---
title: "What Are Wire Rope Clip (U-Bolt) Used For?"
description: "Wire Rope Clip (U-Bolt) are used for lifting, tensioning and securing loads within a rated working load limit. Catalogued 6 mm to 30 mm."
url: https://engineeringhardware.com/applications/cad-svg-157-ropeclip/
source: Engineering Hardware & Fasteners
---

# What Are Wire Rope Clip (U-Bolt) Used For?

Rigging Hardware · ISO / DIN · Application guide

Typical applications, the industries that specify wire rope clip (u-bolt), and how to choose the right size, material and finish for the joint.

Wire Rope Clip (U-Bolt) are used for lifting, tensioning and securing loads within a rated working load limit. They are manufactured to ISO / DIN, and selection is driven by the working load limit required, the applicable safety factor and the service environment.

- **Primary duty:** Lifting, tensioning and securing loads within a rated working load limit
- **Governing standard:** ISO / DIN
- **Rope diameter range:** 6 mm to 30 mm
- **Category:** Rigging Hardware

Application notes are general engineering guidance. Verify the property class and any approval requirement against your own design calculation.

![What Are Wire Rope Clip (U-Bolt) Used For? application image](https://engineeringhardware.com/wp-content/uploads/2026/06/Wire-Rope-Clip-U-Bolt-—-ISO-DIN-Series-157-—-ISO-DIN.webp)

Wire Rope Clip (U-Bolt) are selected when an assembly calls for lifting, tensioning and securing loads within a rated working load limit. This application guide to the ISO / DIN type covers concrete end-uses, the specification checklist, correct installation, and where an alternative fastener performs better. Stocked across roughly 6 mm to 30 mm, they cover general to heavy-duty work.

## Typical Applications for Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157)

The most common settings where these are specified:

- **General machine building:** fastening covers, brackets, motors and sub-assemblies on production equipment.
- **Maintenance & repair (MRO):** a stocked size for servicing existing plant where the original fastener spec must be matched.
- **Fabrication & metalwork:** bench and on-site assembly of steel frames, enclosures and weldments.

## How to Specify Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157) for Your Application

- **Size:** Select on rope diameter, and confirm it against the mating feature in the assembly. This product spans 6 mm–30 mm; check the full table below for the exact dimensions of each size.
- **Material:** Choose the material and finish for the service environment — plated steel for general use, stainless for corrosion resistance.
- **Environment:** For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
- **Standard:** This is a trade-series article rather than one covered by a published dimensional standard, so dimensions can differ between manufacturers. Quote the dimensions you need — or the part you are replacing — rather than a standard number.

## Where Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157) Are Not the Right Choice

Match the fastener to the load, environment and whether the joint must be reopened; the wrong class or style is the usual cause of joint failure.

Custom manufacturing · Made to drawing

## Need a wire rope clip (u-bolt) outside the standard range?

A non-standard rigging hardware is quoted from the drawing; where one already exists in the catalog, the special is usually a variation on its tooling. Made by hot forging.

Minimum order from 2,000 pieces; samples within 7 days of drawing approval.

[Custom rigging hardware manufacturing](https://engineeringhardware.com/custom/rigging/)[Send a drawing](https://engineeringhardware.com/custom/rigging/#rfq)

## Technical Drawing

Dimensioned line drawing of 6 Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **U-bolt diameter (mm):** M5
- **Saddle width (mm):** 16
- **Bolt thread:** M5
- **Working load limit (kg):** 60

## Dimensions & Specifications (ISO / DIN)

| For rope diameter (mm) | U-bolt diameter (mm) | Saddle width (mm) | Bolt thread | Working load limit (kg) | Reference standard |
| --- | --- | --- | --- | --- | --- |
| 6 | M5 | 16 | M5 | 60 | DIN 1142 / GB/T 5976 |
| 8 | M6 | 20 | M6 | 110 | DIN 1142 / GB/T 5976 |
| 10 | M8 | 26 | M8 | 180 | DIN 1142 / GB/T 5976 |
| 12 | M10 | 32 | M10 | 260 | DIN 1142 / GB/T 5976 |
| 16 | M12 | 38 | M12 | 460 | DIN 1142 / GB/T 5976 |
| 20 | M14 | 45 | M14 | 720 | DIN 1142 / GB/T 5976 |
| 24 | M16 | 55 | M16 | 1050 | DIN 1142 / GB/T 5976 |
| 30 | M20 | 70 | M20 | 1640 | DIN 1142 / GB/T 5976 |

Inside the plant

## Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

1. ![Wire rod feeding into a cold heading machine](https://engineeringhardware.com/wp-content/uploads/2026/08/09-wire-rod-feed-cold-heading-machine.webp) 01 **Cold heading** Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail. Head dimensions and under-head radius checked at set-up and per shift.
2. ![Thread rolling machine producing bolt threads](https://engineeringhardware.com/wp-content/uploads/2026/08/03-thread-rolling-machine-bolt-production.webp) 02 **Thread rolling** Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch. Go / no-go ring gauges to ISO 965 tolerance class 6g.
3. ![Baskets of bolts staged for heat treatment](https://engineeringhardware.com/wp-content/uploads/2026/08/05-heat-treatment-baskets-black-bolts.webp) 03 **Heat treatment** Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it. Core hardness and tensile tested per lot to ISO 898-1.
4. ![Zinc plated bolts in a treatment basket](https://engineeringhardware.com/wp-content/uploads/2026/08/23-zinc-plated-bolts-treatment-basket.webp) 04 **Surface treatment** Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list. Coating thickness and neutral salt spray hours to ISO 9227.

## Frequently Asked Questions

### What are Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157) used for?

Lifting, tensioning and securing loads within a rated working load limit. They are supplied to ISO / DIN.

### Which industries use Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157)?

They are commonly specified in general machine building, maintenance & repair (mro) and fabrication & metalwork, among other sectors.

### How do I choose the right size of Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157)?

Select on rope diameter and on the fit the assembly requires. This product is available from 6 mm to 30 mm; the full dimension table on this page lists each size.

### Are Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157) made to a recognized standard?

Yes — they are manufactured to ISO / DIN, so dimensions are interchangeable between suppliers when you quote the standard on your order.

### Can I get a quote for Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157) in the size and material I need?

Yes. Use the technical drawing and quote form on this page to set the size and options, then send the exact configuration to our team for pricing and lead time.

## Related Pages

Product page: [Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157) — specifications & sizes](https://engineeringhardware.com/fastener/cad-svg-157-ropeclip/)

### Wire Rope Clip (U-Bolt) — ISO / DIN (Series 157) Specification Guides

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