---
title: "What Are Eye Swing Bolts Used For?"
description: "Eye Swing Bolts (Trade series (rotatable eye swing bolts)) are used for providing a rated lifting or anchoring point on a threaded hole or stud, within a sta…"
url: https://engineeringhardware.com/applications/eye-swing-bolts/
source: Engineering Hardware & Fasteners
---

# What Are Eye Swing Bolts Used For?

Bolts · Trade series (rotatable eye swing bolts) · Application guide

Typical applications, the industries that specify eye swing bolts, and how to choose the right size, material and finish for the joint.

Eye Swing Bolts are used for providing a rated lifting or anchoring point on a threaded hole or stud, within a stated working load limit. They are manufactured to Trade series (rotatable eye swing bolts), and selection is driven by the working load limit required, the applicable safety factor and the service environment.

- **Primary duty:** Providing a rated lifting or anchoring point on a threaded hole or stud, within a stated working load limit
- **Governing standard:** Trade series (rotatable eye swing bolts)
- **Category:** Bolts

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

![What Are Eye Swing Bolts Used For? application image](https://engineeringhardware.com/wp-content/uploads/2026/09/Carbon-Steel-Stainless-Eye-Swing-Bolts.webp)

The primary duty of Eye Swing Bolts is providing a rated lifting or anchoring point on a threaded hole or stud, within a stated working load limit. Below: the sectors that specify them in volume, the checklist used to select the right size and material for the application, installation notes, and the known limits of the type.

## Typical Applications for Eye Swing Bolts

The most common settings where these are specified:

- **Fabrication & metalwork:** bench and on-site assembly of steel frames, enclosures and weldments.
- **Structural steel:** bolting beams, base plates and bracing where a defined preload and property class are required.
- **Automotive & transport:** chassis, suspension and powertrain mounting points subject to vibration.
- **Heavy machinery:** securing gearboxes, frames and guarding on plant that sees shock loads.
- **Energy & infrastructure:** tower, pylon and pipework supports exposed to weather and long service life.

Product catalog

## Related Eye Swing Bolts products

[![High-End Heavy-Duty Eye Bolt Fasteners for Marine Lifting Applications](https://img.engineeringhardware.com/High-End-Heavy-Duty-Eye-Bolt-Fasteners-for-Marine-Lifting-Applications.webp)](https://engineeringhardware.com/product/high-end-heavy-duty-eye-bolt-fasteners-for-marine-lifting-applications/)

Eye Bolts & Lifting Eye Fasteners

### [High-End Heavy-Duty Eye Bolt Fasteners for Marine Lifting Applications](https://engineeringhardware.com/product/high-end-heavy-duty-eye-bolt-fasteners-for-marine-lifting-applications/)

GB · Stainless Steel

**US$2.40 – 7.20**MOQ 1 piece

[![Durable Stainless Steel Eye Bolt with High Tensile Strength Nut](https://img.engineeringhardware.com/Durable-Stainless-Steel-Eye-Bolt-with-High-Tensile-Strength-Nut.webp)](https://engineeringhardware.com/product/durable-stainless-steel-eye-bolt-with-high-tensile-strength-nut/)

Eye Bolts & Lifting Eye Fasteners

### [Durable Stainless Steel Eye Bolt with High Tensile Strength Nut](https://engineeringhardware.com/product/durable-stainless-steel-eye-bolt-with-high-tensile-strength-nut/)

American Eyebolt · Steel

**US$0.35 – 23.98**MOQ 1 piece

[![Customized M12 Rigging Eye Bolt for Chemical Industry Machinery](https://img.engineeringhardware.com/Customized-M12-Rigging-Eye-Bolt-for-Chemical-Industry-Machinery.webp)](https://engineeringhardware.com/product/customized-m12-rigging-eye-bolt-for-chemical-industry-machinery/)

Eye Bolts & Lifting Eye Fasteners

### [Customized M12 Rigging Eye Bolt for Chemical Industry Machinery](https://engineeringhardware.com/product/customized-m12-rigging-eye-bolt-for-chemical-industry-machinery/)

Eye Bolt · DIN, ANSI, GB, JIS, BSW, GOST

**US$0.36 – 1.20**MOQ 100 bags

[![DIN580 Galvanized Eye Bolt Marine German Standard Carbon Steel Lifting Ring Screw Thread M6-M64](https://img.engineeringhardware.com/DIN580-Galvanized-Eye-Bolt-Marine-German-Standard-Carbon-Steel-Lifting-Ring-Screw-Thread-M6-M64.webp)](https://engineeringhardware.com/product/din580-galvanized-eye-bolt-marine-german-standard-carbon-steel-lifting-ring-screw/)

Eye Bolts & Lifting Eye Fasteners

### [DIN580 Galvanized Eye Bolt Marine German Standard Carbon Steel Lifting Ring Screw Thread M6-M64](https://engineeringhardware.com/product/din580-galvanized-eye-bolt-marine-german-standard-carbon-steel-lifting-ring-screw/)

Eye Bolt · DIN

**US$0.24 – 120.00**MOQ 100 pieces

[![Precision Cartridge Dual Mechanical Seal with Lifting Eye Bolts](https://img.engineeringhardware.com/Precision-Cartridge-Dual-Mechanical-Seal-with-Lifting-Eye-Bolts.webp)](https://engineeringhardware.com/product/precision-cartridge-dual-mechanical-seal-with-lifting-eye-bolts/)

Eye Bolts & Lifting Eye Fasteners

### [Precision Cartridge Dual Mechanical Seal with Lifting Eye Bolts](https://engineeringhardware.com/product/precision-cartridge-dual-mechanical-seal-with-lifting-eye-bolts/)

DIN, GB, ANSI · Stainless Steel

**US$19.20 – 433.20**MOQ 100 pieces

[![Xqx Premium Sturdy Eye Bolt JIS B1168](https://img.engineeringhardware.com/Xqx-Premium-Sturdy-Eye-Bolt-JIS-B1168.webp)](https://engineeringhardware.com/product/xqx-premium-sturdy-eye-bolt-jis-b1168/)

Eye Bolts & Lifting Eye Fasteners

### [Xqx Premium Sturdy Eye Bolt JIS B1168](https://engineeringhardware.com/product/xqx-premium-sturdy-eye-bolt-jis-b1168/)

According to Buyer's Demand · JIS

**US$0.36**MOQ 100 pieces

[View all Eye Bolts & Lifting Eye Fasteners →](https://engineeringhardware.com/fastener-products/bolts/eye-bolts-lifting-eye-fasteners/) [Full product catalog](https://engineeringhardware.com/products/)

## How to Specify Eye Swing Bolts for Your Application

- **Size:** Match the size to the mating part — see the dimension table below for each option.
- **Strength class:** Choose the property class (e.g. 8.8, 10.9, 12.9 or A2/A4 stainless) for the load and environment, and tighten to the matching torque so the joint relies on preload, not friction.
- **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 product is supplied to Trade series (rotatable eye swing bolts). Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

## Installation & Assembly Practice

- Tighten to the torque for the size and property class with a calibrated wrench — the joint is held by preload, not by the thread friction alone.
- Ensure at least one full thread projects beyond the nut after tightening, and never re-use a bolt that has been tightened into yield.
- Under slotted or oversized holes, fit a hardened washer so the preload does not relax into the hole edge.

## Common Selection Mistakes with Eye Swing Bolts

- Specifying class 12.9 "to be safe" in a corrosive environment — high classes are more sensitive to hydrogen embrittlement and stress corrosion; 8.8 hot-dip galvanized often outlasts them outdoors.
- Choosing a length that puts the shear plane through the threaded portion when a plain shank (partially threaded bolt) was available.
- Mixing stainless bolts with plated-steel nuts: the joint loses its corrosion logic and can gall or seize.

## Where Eye Swing Bolts Are Not the Right Choice

Not for permanent joints that will never be opened (a rivet or weld is cheaper), and not where the head must sit flush — use a countersunk screw instead.

Custom manufacturing · Made to drawing

## Need a eye swing bolts outside the standard range?

Dimensions, material, finish and form are specified from the drawing — a bolt outside the standard range is a variation on existing tooling rather than a new design. Made by cold heading or hot forging.

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

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

## Technical Drawing

Dimensioned line drawing of rotatable oval eye Eye Swing Bolts to Trade series (rotatable eye swing bolts). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Material:** carbon steel
- **Nut supplied:** with matching nut
- **Typical use:** machinery fixtures

## Dimensions & Specifications (Trade series (rotatable eye swing bolts))

| Eye form | Material | Nut supplied | Typical use |
| --- | --- | --- | --- |
| rotatable oval eye | carbon steel | with matching nut | machinery fixtures |
| rotatable oval eye | carbon steel | bolt only | clamps and jigs |
| rotatable oval eye | stainless steel | with matching nut | adjustable tension structures |

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

### Which industries use Eye Swing Bolts?

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

### How do I choose the right size of Eye Swing Bolts?

Match the size to the mating part using the dimension table on this page.

### How tight should Eye Swing Bolts be torqued?

Tighten to the torque for the size and property class so the joint is held by bolt preload. The size pages and torque reference table give recommended values; use a calibrated torque wrench for anything structural.

### What material should Eye Swing Bolts be for outdoor use?

For damp, coastal or chemical environments specify A4 (316) stainless or a suitably coated steel. For indoor or dry use, A2 (304) stainless or zinc-plated steel is normally adequate.

### Can I get a quote for Eye Swing Bolts 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: [Eye Swing Bolts — specifications & sizes](https://engineeringhardware.com/fastener/eye-swing-bolts/)

### Eye Swing Bolts Specification Guides

### Related Fastener Applications