{"id":2538,"date":"2026-10-21T03:41:00","date_gmt":"2026-10-21T03:41:00","guid":{"rendered":"https:\/\/www.sino-alloy.com\/clamp\/product\/mss-sp-58-type-24-u-bolt\/"},"modified":"2026-10-21T03:41:00","modified_gmt":"2026-10-21T03:41:00","slug":"mss-sp-58-type-24-u-bolt","status":"publish","type":"product","link":"https:\/\/www.sino-alloy.com\/clamp\/product\/mss-sp-58-type-24-u-bolt\/","title":{"rendered":"MSS SP-58 Type 24 U-Bolt with Four Hex Nuts"},"content":{"rendered":"

An MSS SP-58 Type 24 U-bolt<\/strong> is a round-bar pipe attachment used to support, guide, or restrain piping at structural steel, channel, brackets, and other drawing-defined interfaces. The standard type identifies the U-bolt form; the installed function depends on pipe clearance, nut position, support geometry, and the piping designer’s load and movement requirements. YOUNGLEE supplies carbon-steel and stainless-steel Type 24 U-bolts with four hex nuts, standard-reference or custom dimensions, and project-specified finishes. Pipe size alone is not sufficient for production: actual pipe outside diameter, rod\/thread size, inside width, tangent or leg length, thread length, finish, loads, temperature, and installation arrangement must be confirmed before manufacture.<\/p>\n

Image note: the featured image is a generated representative catalog visual showing one round steel U-bolt with exactly four hex nuts. It explains the general product form only; it does not verify a project dimension, material grade, finish, load rating, test, certification, inventory, or previous supply.<\/em><\/p>\n

MSS SP-58 Type 24 U-Bolt at a Glance<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n
Selection item<\/th>\nTypical YOUNGLEE supply basis<\/th>\nInformation for Buyer Confirmation<\/th>\n<\/tr>\n<\/thead>\n
Product type<\/td>\nRound-bar U-bolt with two threaded legs and four finished hex nuts; Type 24 basis where specified<\/td>\nApplicable MSS SP-58 edition, approved drawing, quantity, and required documentation<\/td>\n<\/tr>\n
Functions<\/td>\nSupport, guide, or anchor\/restraint duty according to the complete installation design<\/td>\nIntended function, permitted movement, clearance, normal load, side load, uplift, and occasional cases<\/td>\n<\/tr>\n
Materials<\/td>\nCarbon steel; 304\/304L or 316\/316L stainless steel; another grade subject to technical review<\/td>\nMaterial specification, grade, delivery condition, traceability, and certificate requirement<\/td>\n<\/tr>\n
Finishes<\/td>\nPlain, electro-zinc plated, hot-dip galvanized, painted, or another specified system compatible with threads and service<\/td>\nFinish standard, coating thickness, service temperature, corrosion environment, thread allowance, and repair method<\/td>\n<\/tr>\n
Size basis<\/td>\nStandard-reference dimensions or custom geometry to drawing and actual pipe OD<\/td>\nNPS\/DN, actual OD, rod\/thread size, inside width, leg\/tangent length, thread length, bend radius, and tolerance<\/td>\n<\/tr>\n
Hardware<\/td>\nFour matching hex nuts are the common Type 24 supply arrangement; washers or plates can be reviewed where shown on the drawing<\/td>\nNut specification, nut locations, locking method, washers, plate thickness, hole spacing, and installation access<\/td>\n<\/tr>\n
Applications<\/td>\nPower, process, marine, utility, HVAC, and industrial pipe-support assemblies<\/td>\nPipe material, support steel, vibration, temperature, outdoor or marine exposure, and dissimilar-metal isolation<\/td>\n<\/tr>\n
Customization<\/td>\nManufacture to an approved customer drawing, project specification, sample, or fully defined Type 24 requirement<\/td>\nDimensions, tolerances, coating, marking, inspection, testing, packing, and document package<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Customization Note:<\/strong> The configurations above are for selection and quotation reference. Actual dimensions vary with the applicable standard edition, actual pipe OD, support or guide function, plate thickness, installation arrangement, coating system, temperature, loads, and project requirements. YOUNGLEE can manufacture Type 24 U-bolts according to customer drawings, specifications, samples, or confirmed installation conditions. Buyers may specify material, rod diameter, thread, inside width, leg or tangent length, thread length, bend radius, nuts, finish, coating, and inspection requirements subject to technical review.<\/p>\n

What Does MSS Type 24 Identify?<\/h2>\n

ANSI\/MSS SP-58 covers pipe hangers and supports, including requirements for materials, allowable stresses, design, manufacture, selection, application, installation, inspection, marking, and documentation. Type 24 is the U-bolt product form. The type number is not a universal part number and does not, by itself, define one material, finish, dimension row, allowable load, or installation function.<\/p>\n

Older catalogs may also refer to MSS SP-69 Type 24. MSS states that the selection and application content of SP-69 was incorporated into SP-58 beginning with the 2009 edition. A purchase order should therefore identify the governing edition and any owner or project additions instead of relying only on \u201cType 24.\u201d<\/p>\n

Public manufacturer catalogs commonly describe a standard Type 24 U-bolt as carbon steel with four hex nuts, while offering zinc finishes, hot-dip galvanizing, stainless steel, plastic coating, longer tangents, longer threads, or non-standard geometry as options. These published series are useful references, but their dimensions and load tables remain supplier-specific until adopted by the buyer’s specification or drawing.<\/p>\n

How Can the Same U-Bolt Act as a Support, Guide, or Restraint?<\/h2>\n
\n\n\n\n\n\n\n\n\n
Installed function<\/th>\nTypical arrangement<\/th>\nKey engineering distinction<\/th>\nInformation for Buyer Confirmation<\/th>\n<\/tr>\n<\/thead>\n
Support attachment<\/td>\nPipe is held to a plate, bracket, beam, or channel that carries the vertical reaction<\/td>\nThe support steel and bearing interface carry load; the U-bolt is only one component of the load path<\/td>\nVertical reactions, plate and holes, support orientation, nut position, and allowable local pipe stress<\/td>\n<\/tr>\n
Guide or non-grip U-bolt<\/td>\nControlled clearance permits axial movement while limiting lateral displacement<\/td>\nInside width, side clearance, vertical clearance, and double-nut setting must preserve the designed movement<\/td>\nCold and hot pipe OD, movement direction, travel, clearances, friction, and guide spacing<\/td>\n<\/tr>\n
Grip clamp<\/td>\nNuts are tightened to develop contact against the pipe or an intermediate sleeve<\/td>\nTightening can create local pipe stress and friction; torque is not universal and must come from the design<\/td>\nRequired grip, installation torque or snug-tight instruction, pipe wall, coating, sleeve, and vibration<\/td>\n<\/tr>\n
Anchor or restraint component<\/td>\nThe assembly is designed to resist specified axial, lateral, uplift, or occasional forces<\/td>\nA U-bolt does not become an anchor merely because four nuts are fitted; the full bracket, welds, bolts, structure, and pipe checks control capacity<\/td>\nAll load combinations, direction, support stiffness, attachment details, structural capacity, and calculation basis<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Customization Note:<\/strong> Function is determined by the complete installed assembly, not by the U-shape alone. Dimensions and technical values are for selection and quotation reference. YOUNGLEE can manufacture grip, non-grip, guide, support, or restraint U-bolts to approved drawings. The buyer should confirm actual pipe OD, movement, clearances, plate geometry, load cases, nut settings, material, finish, and installation instructions.<\/p>\n

Reference Dimensions and Exact Inch Conversions<\/h2>\n

The table below reproduces selected small-size geometry from a publicly available established Type 24 supplier series to explain the dimensional vocabulary. It is not a universal MSS dimension table and not a YOUNGLEE stock list. In this reference, A is rod\/thread size, B is inside width, C is outside width, D is the pipe-centreline-to-leg-end dimension, and E is thread length. The source inch fractions are retained exactly; metric values are calculated directly from those fractions using exactly 25.4 mm per inch.<\/p>\n

\n\n\n\n\n\n\n\n\n
Nominal pipe size<\/th>\nA: rod\/thread<\/th>\nB: inside width<\/th>\nC: outside width<\/th>\nD: centreline to leg end<\/th>\nE: thread length<\/th>\nInformation for Buyer Confirmation<\/th>\n<\/tr>\n<\/thead>\n
NPS 1\/2<\/td>\n1\/4 in (6.35 mm calculated)<\/td>\n15\/16 in (23.8125 mm calculated)<\/td>\n1 3\/16 in (30.1625 mm calculated)<\/td>\n2 3\/4 in (69.85 mm calculated)<\/td>\n2 1\/8 in (53.975 mm calculated)<\/td>\nActual pipe OD, specified clearance, plate elevation, nut engagement, and source series<\/td>\n<\/tr>\n
NPS 3\/4<\/td>\n1\/4 in (6.35 mm calculated)<\/td>\n1 1\/8 in (28.575 mm calculated)<\/td>\n1 3\/8 in (34.925 mm calculated)<\/td>\n2 3\/4 in (69.85 mm calculated)<\/td>\n2 1\/8 in (53.975 mm calculated)<\/td>\nActual pipe OD, specified clearance, plate elevation, nut engagement, and source series<\/td>\n<\/tr>\n
NPS 1<\/td>\n1\/4 in (6.35 mm calculated)<\/td>\n1 3\/8 in (34.925 mm calculated)<\/td>\n1 5\/8 in (41.275 mm calculated)<\/td>\n2 3\/4 in (69.85 mm calculated)<\/td>\n2 1\/8 in (53.975 mm calculated)<\/td>\nActual pipe OD, specified clearance, plate elevation, nut engagement, and source series<\/td>\n<\/tr>\n
NPS 1 1\/4<\/td>\n3\/8 in (9.525 mm calculated)<\/td>\n1 11\/16 in (42.8625 mm calculated)<\/td>\n2 1\/16 in (52.3875 mm calculated)<\/td>\n2 7\/8 in (73.025 mm calculated)<\/td>\n2 1\/2 in (63.5 mm calculated)<\/td>\nActual pipe OD, specified clearance, plate elevation, nut engagement, and source series<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Customization Note:<\/strong> These dimensions are industry-supplier reference values for selection and quotation discussion, not mandatory universal dimensions or a load guarantee. Actual dimensions may vary with the specified Type 24 series, applicable standard edition, actual pipe OD, grip or non-grip design, plate thickness, installation arrangement, finish allowance, and project requirements. YOUNGLEE can manufacture to customer drawings, specifications, samples, or confirmed installation conditions. Buyers may specify rod size, thread form, inside width, leg length, thread length, bend radius, nuts, coating, and other dimensional requirements.<\/p>\n

Why Nominal Pipe Size Is Not the Same as U-Bolt Inside Width<\/h2>\n

NPS or DN is a pipe designation, not the measured outside diameter and not the required U-bolt opening. The same nominal pipe designation may have a defined outside diameter under the selected piping standard, while coatings, wraps, sleeves, temperature, tolerances, and the intended guide clearance change the space required inside the U-bolt. Ordering from NPS alone can therefore create an interference fit or excessive guide clearance.<\/p>\n

For a bare-pipe grip application, the drawing may allow only the clearance necessary for assembly and finish. A guide arrangement needs intentional side and vertical clearance through the complete cold-to-hot movement. A coated or isolated assembly must account for the sleeve or coating thickness on both sides. YOUNGLEE should receive the actual OD and the required installed clearance rather than infer both from the nominal designation.<\/p>\n

Material and Finish Selection<\/h2>\n

Carbon steel is the common basis for standard U-bolts because it is readily formed, threaded, coated, and matched to general structural support steel. The purchase specification should state the material standard and grade; \u201ccarbon steel\u201d alone does not define strength, toughness, heat treatment, chemistry, or traceability. For alloy-steel process-piping attachments, buyers can compare YOUNGLEE’s ASTM A193 Grade B7 U-bolt<\/a>, but that material standard does not replace Type 24 geometry or support design.<\/p>\n

304\/304L and 316\/316L stainless steel can be reviewed for corrosive or hygienic environments. Grade, strength condition, forming route, thread manufacture, galling control, surface finish, and dissimilar-metal contact should be specified. See the related 316 stainless-steel U-bolt clamps<\/a> for a material-focused option.<\/p>\n

Electro-zinc plating is compact and compatible with many indoor and moderate environments. Hot-dip galvanizing provides a thicker zinc layer but changes thread fit; oversize-tapped nuts or another specified post-coating thread system may be required. Galvanized temperature limits and coating acceptance depend on the project. YOUNGLEE’s hot-dip galvanized U-bolt pipe clamps<\/a> illustrate the finish-led selection path. Paint and project coating systems require defined surface preparation, thickness, masking, cure, inspection, and repair.<\/p>\n

Four Hex Nuts and Installation Arrangement<\/h2>\n

Four nuts provide flexibility for positioning a Type 24 U-bolt around a plate or structural member, but their locations must follow the approved drawing. One common arrangement places a nut on each side of the support plate on both legs, allowing the installer to establish position and lock the assembly. Another detail may use both nuts below the plate or omit a pair. The hardware count alone does not define whether the pipe is gripped, guided, or anchored.<\/p>\n

Threads must provide the specified engagement after accounting for plate thickness, washers, nut height, coating, tolerance, and field adjustment. Excessively short threads prevent assembly; threads extending into a high-contact bend zone may create an unintended stress concentration. Installation instructions should define snug-tight, torque, jam-nut, prevailing-torque, or other locking requirements. A universal tightening torque should not be inferred from rod diameter alone.<\/p>\n

When Is a Custom Type 24 U-Bolt Required?<\/h2>\n

A custom drawing is appropriate when the pipe has a nonstandard OD, thick coating, insulation sleeve, special clearance, unusual support plate, extended legs, long threads, metric thread, restricted bend radius, or project-specific material and coating. Custom dimensions are also useful when a guide must maintain a calculated movement envelope or when existing support steel cannot accept a catalog hole pattern.<\/p>\n

Custom does not mean uncontrolled. The drawing should define the reference datums, whether width is measured inside or outside, the leg-length reference, thread start and length, bend radius, straightness, leg parallelism, coating allowance, and inspection method. If the supported member is rectangular rather than round, a square-bend U-bolt for rectangular tubing<\/a> is a different geometry and should not be substituted by widening a round Type 24 U-bolt.<\/p>\n

Manufacturing and Inspection Considerations<\/h2>\n
    \n
  • Verify material identity, rod diameter, heat or lot traceability, and delivery condition before bending and threading.<\/li>\n
  • Control inside width, crown profile, bend radius, leg parallelism, leg length, thread length, and thread form against the approved drawing.<\/li>\n
  • Use forming procedures appropriate to the material and diameter; inspect for cracks, laps, excessive flattening, twist, and surface damage at the crown.<\/li>\n
  • Check nuts and threads before and after coating. Hot-dip-galvanized assemblies require a compatible thread allowance and matched nut system.<\/li>\n
  • Verify coating appearance, thickness or mass where specified, adhesion where applicable, bare spots, drainage marks, thread fit, and approved repair.<\/li>\n
  • Perform dimensional inspection with a template, gauge, or recorded measurements; load testing or special NDE is supplied only when defined by the contract.<\/li>\n
  • Mark and package matched sizes and hardware so threads and finishes remain protected during export handling.<\/li>\n<\/ul>\n

    Information Required for Quotation<\/h2>\n
    \n\n\n\n\n\n\n\n\n\n\n\n
    Quotation input<\/th>\nWhy it matters<\/th>\nInformation for Buyer Confirmation<\/th>\n<\/tr>\n<\/thead>\n
    Standard and function<\/td>\nDefines whether the item is a Type 24 support, guide, grip clamp, or restraint component<\/td>\nMSS SP-58 edition, project specification, drawing number, function, and movement<\/td>\n<\/tr>\n
    Pipe definition<\/td>\nControls the required opening and contact condition<\/td>\nNPS or DN, actual OD, material, wall\/schedule, coating or sleeve thickness, and tolerance<\/td>\n<\/tr>\n
    U-bolt geometry<\/td>\nDefines fit with pipe and support steel<\/td>\nRod\/thread size, inside width, leg\/tangent length, thread length, bend radius, and dimensional datum<\/td>\n<\/tr>\n
    Support interface<\/td>\nControls nut position, hole spacing, usable thread, and field access<\/td>\nPlate or channel dimensions, thickness, hole diameter and spacing, washers, nut arrangement, and access<\/td>\n<\/tr>\n
    Loads and service<\/td>\nControls material, size, restraint function, and engineering review<\/td>\nNormal, side, axial, uplift, occasional and dynamic loads; temperature, vibration, movement, and corrosion environment<\/td>\n<\/tr>\n
    Material and finish<\/td>\nControls strength, forming, corrosion protection, thread fit, and compatibility<\/td>\nMaterial standard\/grade, nut material, coating specification, thickness, color if relevant, and dissimilar-metal isolation<\/td>\n<\/tr>\n
    Quality and supply<\/td>\nDefines acceptance and deliverables<\/td>\nInspection, test, certificates, traceability, marking, quantity, packing, and required approval documents<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Customization Note:<\/strong> The quotation inputs above define the complete U-bolt and support interface. YOUNGLEE can manufacture standard-reference and custom Type 24 U-bolts to approved drawings, specifications, samples, or confirmed installation conditions. Final material, rod size, thread, inside width, leg length, thread length, bend radius, nuts, coating, tolerances, inspection, and documentation remain subject to technical review.<\/p>\n

    Frequently Asked Questions<\/h2>\n

    Does Type 24 mean the U-bolt has one fixed dimension table?<\/h3>\n

    No. Type 24 identifies the U-bolt product form. Published manufacturer series can differ in size range, rod size, width, leg length, thread length, finish, hardware, and load basis. Use the contract edition, approved series, and drawing.<\/p>\n

    Are four nuts always installed in the same positions?<\/h3>\n

    No. Four hex nuts are a common supply arrangement, but their positions depend on the support plate and intended function. The approved installation drawing must show which nuts locate, clamp, or lock the assembly.<\/p>\n

    Can a Type 24 U-bolt be used as a non-grip guide?<\/h3>\n

    Yes, when the inside width, vertical setting, and nut positions provide the required clearance while limiting lateral movement. Thermal travel and guide spacing must be determined by the piping design.<\/p>\n

    Does the standard type number establish load capacity?<\/h3>\n

    No. Capacity depends on material, rod\/thread size, temperature, geometry, thread engagement, nut system, installation, support structure, load direction, and interaction of simultaneous loads. Submit the project reactions for review.<\/p>\n

    What should be sent for a custom quotation?<\/h3>\n

    Send the drawing and standard edition together with actual pipe OD, rod\/thread size, inside width, leg length, thread length, plate geometry, nut arrangement, material, finish, loads, temperature, quantity, inspection, and documentation requirements.<\/p>\n

    Request an MSS Type 24 U-Bolt Quotation<\/h2>\n

    Send YOUNGLEE the applicable MSS SP-58 edition, support drawing, NPS or DN, actual pipe OD, rod diameter and thread, inside width, leg or tangent length, thread length, bend radius, material grade, nut arrangement, support plate, coating, function, movement, loads, service temperature, corrosion environment, quantity, inspection, and document requirements. YOUNGLEE will review the complete installation and manufacture the MSS SP-58 Type 24 U-bolt to the approved drawing or confirmed standard-reference series.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Custom MSS SP-58 Type 24 pipe U-bolts with four hex nuts for support, guide or restraint duties. Specify actual pipe OD, geometry, loads, material and finish.<\/p>\n","protected":false},"featured_media":2537,"template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_cat":[85],"product_tag":[],"_links":{"self":[{"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/product\/2538"}],"collection":[{"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/media\/2537"}],"wp:attachment":[{"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/media?parent=2538"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/product_cat?post=2538"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.sino-alloy.com\/clamp\/wp-json\/wp\/v2\/product_tag?post=2538"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}