One-piece eye bolts turned from solid bar, bent-eye bolts, DIN 444 style swing bolts — in the threads, eye sizes and materials no catalog stocks. Metric fine, Whitworth, 316L, titanium. Two pieces are a normal order.
Eye bolts split into two worlds, and an honest supplier tells you which one your job belongs to before quoting:
Hoisting machinery, engines, molds — anything that swings over people. That is drop-forged, heat-treated shoulder eye bolt territory (ASME B18.15, rigged per ASME B30.26, marked WLL). Buy them from a rigging supplier. We don't machine rated lifting eyes — and if you ask us to quote one, we'll say exactly that.
Guying and tensioning, cable terminations, tie-down points, fixtures and positioning, architectural rigging, covers and hatches, replacements for unrated originals. Here the problem is never load rating — it's that the geometry you need doesn't exist in a catalog. That's a machining job.
| Pattern | How it's made | Typical use |
|---|---|---|
| One-piece machined | Turned and milled from solid bar — eye, shank and thread with no weld or bend seam | Clean geometry, stainless/titanium, exact eye ID |
| Bent-eye (open or closed) | Formed from rod; closed eyes welded on request | Cable ends, guy wires, hooks and lashing points |
| Swing / articulated (DIN 444 style) | Machined eye pivoting on a pin | Clamping levers, quick-release closures, autoclave doors |
| Shoulder-pattern, unrated | Machined shoulder seats against the face | Positioning, alignment and fixture points |
| Lag-thread eye screws | Machined eye with wood/lag thread | Timber structures, architectural |
| Eye studs / fully threaded | Thread the full shank length, eye on top | Adjustable tensioning, turnbuckle ends |
Every dimension floats: eye inside diameter, shank length, thread size and pitch are whatever the drawing says — including combinations that exist in no standard, like a 28 mm eye on an M12×1.25 fine thread, or a BSW thread for a hundred-year-old machine, matched from your sample the same way as any replacement bolt.
| Attribute | Range |
|---|---|
| Threads | Metric coarse & fine M5–M36, UNC/UNF ¼"–1¼", BSW/BSF, left-hand on request |
| Eye inside diameter | 6–60 mm, independent of thread size |
| Shank length | To 500 mm+, fully or partially threaded |
| Materials | Stainless A2-70 (304), A4-80 (316L), titanium Grade 5, brass, C45 / 42CrMo4 steel |
| Finish | Plain, passivated, black oxide, zinc; polished for architectural work |
| Documentation | EN 10204 3.1 material certificate and dimensional report on request |
Catalog stainless eyes stop at standard lengths and a mill finish. We machine the exact shank, thread and eye ID in 316L, polished, with matching coupling nuts or turnbuckle ends if the run needs them.
DIN 444 style swing bolts in fine pitch are a turning job. Send one worn original; we measure eye, pin bore and thread, and machine replacements in A4 — plus spares in the same run.
Pre-metric threads are routine here: we gauge the Whitworth thread from your sample and machine the eye to the original drawing dimensions — one piece if that's all you need.
Matched counterparts: eye nuts, clevis ends, pins and U-bolts can be machined in the same material and finish, so a rigging or tensioning run arrives as one consistent, certified package.
Not for load-rated overhead lifting — that calls for drop-forged, WLL-marked eye bolts to ASME B18.15/B30.26 from a rigging supplier, and we'll say so if asked. Machined eye bolts are for guying, tensioning, tie-down, fixtures and architectural work where geometry, not rating, is the problem.
Yes — machined eye, precision shank, metric coarse or fine, stainless or steel, including non-standard lengths and replacements measured from a worn sample.
One-piece from solid bar, bent-eye open or closed, DIN 444 swing bolts, unrated shoulder-pattern, lag-thread eye screws and fully threaded eye studs — with eye ID, shank and thread all to your print.
One piece. No tooling, no minimum — two stainless eye bolts in an odd thread is a normal order here.
A drawing, sketch or the old eye bolt. Key dimensions: thread size and pitch, shank length, eye inside diameter, material or environment. Quote in 24 hours.
Drawing, dimensions or the worn original. Engineers reply in 24h.
// Qty & price
1 pc
Sample price
Confirm fit before a run
3–50
Unit price drops
Setup cost shared
50+
Best price
All tiers quoted upfront
Odd threads, exact eye sizes, 316L or titanium — machined to your print or measured from the worn original. Quote in 24 hours.