# Screw eyes, cup hooks and square-bend (L) screw hooks: overall length, thread length, wire diameter, eye and hook size (maker tables)

> What are the length, thread length and wire diameter of a screw eye, a cup hook or an L (square-bend) screw hook?

- Category: Hardware › Fasteners
- Kind: Standard part
- Basis: National Hardware screw eyes (AIH distributor pages), Lee Valley's shouldered cup hooks and Lexco's square-bend screw hooks, as printed; maker / distributor numbers only, there is no standard behind these
- Page: https://xemstudio.com/objects/screw-eyes-cup-hooks-and-screw-hooks/ · JSON: https://xemstudio.com/api/geometry?object=screw-eyes-cup-hooks-and-screw-hooks · Plain text: https://xemstudio.com/objects/screw-eyes-cup-hooks-and-screw-hooks/sheet.txt
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**Exact dimensions.** True size, with no tolerance added.

## Notes

- There is no common standard for screw eyes, cup hooks and screw hooks: each maker lists its own sizes, usually as a size number plus lengths. The rows below are the products read, not a size system; check your own part.
- Screw eyes: National Hardware pages (via AIH) print length, thread length and eye inside diameter, in inches (decimal as printed); only N118-927 prints a width (0.1 in), which is not called wire diameter on the page. Wire diameter is therefore not listed for screw eyes.
- Cup hooks: Lee Valley's shouldered cup hooks list depth (the hook length without the screw), eye ID, screw length and wire thickness (2 to 3.3 mm). Other sellers' cup hooks were read (Bearwood lists only 1/2 to 1-1/2 in sizes) and print no wire or thread data, so they are not on this page.
- L / J hooks: Lexco's square-bend screw hooks list overall length L, thread length T, wire diameter D and hook length C in inches (as printed). Items 10503 and 10567 print identical dimensions (the finish differs); 10511 repeats 10571 and is shown once.
- No file: wire hooks and eyes are formed wire, and the bend radii and thread form are not published as numbers in any source read, so a model would be invented. McMaster-Carr lists screw eyes and hooks with per-part STEP; its category pages could not be read in full here and are not linked.

## Sizes

| type | item | overall length (in) | thread length / screw length (in) | wire diameter | eye or hook size | note |
|---|---|---|---|---|---|---|
| screw eye (National Hardware via AIH) | N118-968 medium screw eye | 0.95 | 0.31 | not listed (N118-927 prints width 0.1) | eye inside dia 1/4 | — |
| screw eye (National Hardware via AIH) | N118-927 screw eye | 1-1/8 | 0.44 | not listed (N118-927 prints width 0.1) | eye inside dia 0.28 | — |
| screw eye (National Hardware via AIH) | N119-198 large screw eye | 2.19 | 0.94 | not listed (N118-927 prints width 0.1) | eye inside dia 0.61 | — |
| screw eye (National Hardware via AIH) | N324-665 large screw eye | 1.94 | 3/4 | not listed (N118-927 prints width 0.1) | eye inside dia 0.53 | — |
| screw eye (National Hardware via AIH) | N220-434 large screw eye | 2.62 | 1.12 | not listed (N118-927 prints width 0.1) | eye inside dia 0.72 | — |
| shouldered cup hook (Lee Valley 53691) | depth 1/2 | — | screw length 1/4 | 2 mm | eye ID 1/4 | depth = hook length not including the screw |
| shouldered cup hook (Lee Valley 53691) | depth 3/4 | — | screw length 7/16 | 2.4 mm | eye ID 3/8 | depth = hook length not including the screw |
| shouldered cup hook (Lee Valley 53691) | depth 1 | — | screw length 7/16 | 2.5 mm | eye ID 1/2 | depth = hook length not including the screw |
| shouldered cup hook (Lee Valley 53691) | depth 1-1/4 | — | screw length 11/16 | 3.3 mm | eye ID 3/4 | depth = hook length not including the screw |
| shouldered cup hook (Lee Valley 53691) | depth 1-1/2 | — | screw length 11/16 | 3.3 mm | eye ID 13/16 | depth = hook length not including the screw |
| square-bend (L) screw hook (Lexco) | item 10571 | 1 | 7/16 | 0.080 | hook length C 5/16 |  |
| square-bend (L) screw hook (Lexco) | item 10507 | 1-13/16 | 11/16 | 0.135 | hook length C 9/16 |  |
| square-bend (L) screw hook (Lexco) | item 10505 | 2-1/4 | 7/8 | 0.160 | hook length C 5/8 |  |
| square-bend (L) screw hook (Lexco) | item 10503 (10567 prints the same dimensions) | 2-5/8 | 1 | 0.192 | hook length C 11/16 |  |
| square-bend (L) screw hook (Lexco) | item 10501 | 3-1/16 | 1-3/8 | 0.225 | hook length C 3/4 |  |

## Where the files are

- American Industrial Hardware (AIH): [National Hardware N118-968 medium screw eye: length, thread length, eye inside diameter](https://aih.com/Product/NAT118968) — web — Distributor page; numbers only
- American Industrial Hardware (AIH): [National Hardware N118-927 screw eye: length, thread length, eye inside diameter](https://aih.com/Product/NAT118927) — web — Distributor page; numbers only
- American Industrial Hardware (AIH): [National Hardware N119-198 large screw eye: length, thread length, eye inside diameter](https://www.aih.com/Product/NAT119198) — web — Distributor page; numbers only
- American Industrial Hardware (AIH): [National Hardware N324-665 large screw eye: length, thread length, eye inside diameter](https://aih.com/Product/NAT324665) — web — Distributor page; numbers only
- American Industrial Hardware (AIH): [National Hardware N220-434 large screw eye: length, thread length, eye inside diameter](https://www.aih.com/Catalog/Hardware/Hardware-Supplies/Screw-Eyes/NAT220434) — web — Distributor page; numbers only
- Lee Valley: [Shouldered cup hooks 53691: depth, eye ID, screw length, wire thickness](https://www.leevalley.com/en-us/shop/hardware/hooks/screw-hook/53691-shouldered-cup-hooks?p=1) — web — Maker page; numbers only
- Lexco Cable: [Square bend screw hooks item 10501: overall length, thread length, wire diameter, hook length](https://catalog.lexcocable.com/printitem/cable-fittings-hardware-hooks/square-bend-screw-hooks/10501?plpver=10) — web — Maker catalog page; numbers only
- Lexco Cable: [Square bend screw hooks item 10503: overall length, thread length, wire diameter, hook length](https://catalog.lexcocable.com/printitem/cable-fittings-hardware-hooks/square-bend-screw-hooks/10503?plpver=10) — web — Maker catalog page; numbers only
- Lexco Cable: [Square bend screw hooks item 10505: overall length, thread length, wire diameter, hook length](https://catalog.lexcocable.com/printitem/cable-fittings-hardware-hooks/square-bend-screw-hooks/10505?plpver=10) — web — Maker catalog page; numbers only
- Lexco Cable: [Square bend screw hooks item 10507: overall length, thread length, wire diameter, hook length](https://catalog.lexcocable.com/printitem/cable-fittings-hardware-hooks/square-bend-screw-hooks/10507?plpver=10) — web — Maker catalog page; numbers only
- Lexco Cable: [Square bend screw hooks item 10511: overall length, thread length, wire diameter, hook length](https://catalog.lexcocable.com/printitem/cable-fittings-hardware-hooks/square-bend-screw-hooks/10511?plpver=10) — web — Maker catalog page; numbers only
- Lexco Cable: [Square bend screw hooks item 10567: overall length, thread length, wire diameter, hook length](https://catalog.lexcocable.com/printitem/cable-fittings-hardware-hooks/square-bend-screw-hooks/10567?plpver=10) — web — Maker catalog page; numbers only
- Lexco Cable: [Square bend screw hooks item 10571: overall length, thread length, wire diameter, hook length](https://catalog.lexcocable.com/printitem/cable-fittings-hardware-hooks/square-bend-screw-hooks/10571?plpver=10) — web — Maker catalog page; numbers only

## Questions

**What is the wire diameter of a Lexco 3 in square-bend screw hook?**

Item 10501 is 3-1/16 in long overall with a 1-3/8 in thread and 0.225 in wire; the 2-5/8 in item 10503 has 0.192 in wire.

**How long is the screw on a 1 in shouldered cup hook?**

Lee Valley's 1 in deep shouldered cup hook has a 7/16 in screw length, 1/2 in eye ID and 2.5 mm wire.

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