Stainless Steel Turnbuckles — Marine Grade Rigging Screws
316 stainless steel turnbuckles from 3/16" to 1-1/2", with working loads from 100 to 17,000 lb. Jaw, eye,…
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A stainless steel eye bolt threads into a structure and gives you a ring to lift from or tie off to. The eye carries the load; the shank holds it in place.
The stainless steel eye bolt range comes in four build tiers: wire-formed types, forged shoulder and plain types, cast machinery types, and a metric series. Load-rated sizes use 316 non-magnetic stainless steel and meet ASME B30.26-2010 Section 26-2.0, running from 1/4" to 1" with working loads of 500 to 9,370 lb.
Product Features
- Light duty to heavy duty in one line. Wire-formed sizes run 3/16" to 3/4" at 100–2,000 lb; forged load-rated sizes run 1/4" to 1" at 500–9,370 lb; a metric series covers M6 to M24.
- Load-rated to a recognised standard. Shoulder and plain eye bolts are forged in 316-NM and built to ASME B30.26-2010 Section 26-2.0.
- Stamped for inspection. Load-rated stainless steel eye bolts carry forged markings for grade, size and working load in tons.
- Machined for a snug fit. The shank and the underside of the shoulder are machined so the bolt seats square when tightened.
- Supplied ready to fit. One nut and one washer come with each eye bolt, with extras available from stock.
- Clear safety basis. Ultimate load is five times the working load. A straight, inline pull is what the rating assumes.
- Large sizes on request. Hot-dip galvanised drop-forged eye bolts reach 1-1/2" and 24,000 lb.
Stainless Steel Eye Bolt Specifications
Material: 304 stainless for wire-formed types; 316 stainless for cast types; 316-NM stainless for forged load-rated types.
Thread form: UNC (inch) or metric.
Typical sizes (forged shoulder eye bolt):
| Thread size | Thread | Working load (lb) | Unit weight (lb) |
|---|---|---|---|
| 1/4" | 1/4"-20 | 500 | 0.06 |
| 5/16" | 5/16"-18 | 800 | 0.12 |
| 3/8" | 3/8"-16 | 1,200 | 0.20 |
| 1/2" | 1/2"-13 | 2,150 | 0.30 |
| 5/8" | 5/8"-11 | 3,440 | 0.60 |
| 3/4" | 3/4"-10 | 5,140 | 0.94 |
| 7/8" | 7/8"-9 | 7,130 | 2.32 |
| 1" | 1"-8 | 9,370 | 2.56 |
Larger hot-dip galvanised drop-forged types extend to 1-1/2", with working loads to 24,000 lb.
Not published in this range: surface finish (electropolish/passivation) process notes, pack quantities, and load-derating factors for 30°/45°/60° sling angles. Ask us for these against a specific order.
Applications
- Lifting and rigging. A lift point for slings and shackles, from light-duty to heavy-duty work.
- Marine and boat fitting. Bow and stern eyes and deck tie-down points.
- Concrete and precast lifting. Edge lifting in shear, using cast-in lifting eyes.
- Outdoor and marine structures. Fixed attachment points that sit in salt spray and damp.
This fitting is part of our stainless steel marine hardware range. See also stainless steel turnbuckles, or send us your specification for a size and quantity quote.
Frequently Asked Questions
How much can a 1/2" shoulder eye bolt hold?
2,150 lb working load, in the forged 316-NM shoulder range.
Can an eye bolt take a side pull?
The rating assumes a straight, inline pull. Any angle needs a reduction, so check the derating table for the job.
What is the safety factor?
Ultimate load is five times the working load.
What is the difference between a shoulder eye bolt and a plain eye bolt?
A shoulder type passes load through a machined shoulder face, so it seats more firmly. A plain type has a simpler shape for tighter spaces.