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Bungee / shock cord diameters (1/8 to 5/8 in) and the hook sizes that go with them
What diameters does bungee (shock) cord come in, and what size hook goes with each? · Standard part · basis: Aircraft Spruce shock cord list, Albright's Supply cord and coil-hook sizes, Paracord Planet hook set; numbers only; hook / cord pairing as each shop lists it
Also called: bungee cord sizes, shock cord diameters, bungee cord diameter 3/8, bungee hook size for 1/4 cord, shock cord 1/8, 5/16 shock cord hook, bungee cord 1/2 inch, mil-c-5651 shock cord, bungee cord thickness mm, bungee hooks 3/8, elastic shock cord sizes, what size hook for 3/16 shock cord
Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features
- sizes
- 17 in table
Notes
- Shock (bungee) cord is elastic cord: rubber strands inside a braided cover, sold by nominal diameter. Aircraft Spruce's shock cord is cotton-covered natural rubber to MIL-C-5651D Type I in the 'certifiable' sizes 1/4, 3/8, 1/2, 5/8 in, plus 1/8 and 5/16 in; Albright's lists 1/8, 3/16, 1/4, 5/16 and 3/8 in. The two lists agree on 1/8, 1/4, 5/16, 3/8; 3/16 is only on Albright's and 1/2, 5/8 only on Aircraft Spruce. Diameters are nominal and no diameter tolerance is printed.
- Hooks: the two shops that pair hooks with a cord do not agree on every size. Paracord Planet's 10-piece wire hook set pairs a 1/4 in hook with 3/16 cord, a 5/16 in hook with 5/16 cord, a 3/8 in hook with 5/16 cord, a 1/2 in hook with 1/2 cord. Albright's metal coil hooks are 1/4 x 2-7/8 (for 1/4 in cord), 3/8 x 2-7/8 (for 3/8 cord) and 1/2 x 2-7/8 (for 1/2 cord), and one plastic adjustable hook is listed for 3/16, 1/4 and 5/16 cord. So the 1/4 in hook fits 1/4 in cord at Albright's but 3/16 in cord at Paracord Planet, and the 3/8 in hook is for 3/8 cord at Albright's but for 5/16 cord at Paracord Planet: both are shown, and the hook size is a trade size, not a measured hole. Aircraft Spruce sells shock-cord fasteners separately in 1/4 and 3/8 in.
- No hook dimension other than Albright's 2-7/8 in coil-hook length is printed in any source read (wire gauge, opening and throat are not given), so no hook drawing exists. The hook / cord pairing is the only mating data.
- Bungee cord with hooks as ready-made 'bungee cords' (lengths 10 to 48 in, hook coating) was not tabulated: no length table with a source was read.
- Rope: double-braid-rope-polyester-nylon-diameters. Paracord: paracord-types-mil-c-5040. Rubber O-ring cord: o-ring-cord-stock-sizes.
Bungee / shock cord diameters (1/8 to 5/8 in) and the hook sizes… size chart
| source | cord diameter (in) | mm | spec / type | hook paired with it | note |
|---|---|---|---|---|---|
| Aircraft Spruce shock cord | 1/8 in | 3.17 | type not stated | — | PN 06-12100 |
| Aircraft Spruce shock cord | 3/16 in | — | — | — | not listed |
| Aircraft Spruce shock cord | 1/4 in | 6.35 | MIL-C-5651D Type I (certifiable size) | — | PN 06-12200; fastener for 1/4 in is PN 06-12800, sold separately |
| Aircraft Spruce shock cord | 5/16 in | 7.94 | Type III (spec not given) | — | PN 06-12300 |
| Aircraft Spruce shock cord | 3/8 in | 9.52 | MIL-C-5651D Type I (certifiable size) | — | PN 06-12400; fastener for 3/8 in is PN 06-12900, sold separately |
| Aircraft Spruce shock cord | 1/2 in | 12.70 | MIL-C-5651D Type I (certifiable size) | — | PN 06-12500 |
| Aircraft Spruce shock cord | 5/8 in | 15.88 | MIL-C-5651D Type I (certifiable size) | — | PN 06-12600 |
| Albright's Supply bungee / shock cord | 1/8 in | 3.17 | — | — | listed |
| Albright's Supply bungee / shock cord | 3/16 in | 4.76 | — | plastic adjustable hook (one size, fits 3/16, 1/4, 5/16) | listed |
| Albright's Supply bungee / shock cord | 1/4 in | 6.35 | — | metal coil hook 1/4 x 2-7/8 in | listed |
| Albright's Supply bungee / shock cord | 5/16 in | 7.94 | — | plastic adjustable hook (see above) | listed |
| Albright's Supply bungee / shock cord | 3/8 in | 9.52 | — | metal coil hook 3/8 x 2-7/8 in | listed |
| Albright's Supply (hook only) | 1/2 in | 12.70 | — | metal coil hook 1/2 x 2-7/8 in (cord diameter not on the cord list) | hook listed for 1/2 in cord |
| Paracord Planet wire hooks, 10 pc | 3/16 in cord | 4.76 | — | 1/4 in wire hook | hook listed as fitting |
| Paracord Planet wire hooks, 10 pc | 5/16 in cord | 7.94 | — | 5/16 in wire hook | hook listed as fitting |
| Paracord Planet wire hooks, 10 pc | 5/16 in cord | 7.94 | — | 3/8 in wire hook (a reviewer says it is not large enough for 3/8 cord) | hook listed as fitting |
| Paracord Planet wire hooks, 10 pc | 1/2 in cord | 12.70 | — | 1/2 in wire hook | hook listed as fitting |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| cord diameter 3/16 in | 3/16 in (4.76 mm) | 1/4 in wire hook (Paracord Planet 10-piece set) or Albright's plastic adjustable hook | designed | all |
| cord diameter 1/4 in | 1/4 in (6.35 mm) | 1/4 x 2-7/8 in metal coil hook (Albright's); Aircraft Spruce 1/4 in shock-cord fastener PN 06-12800 | designed | all |
| cord diameter 5/16 in | 5/16 in (7.94 mm) | 5/16 in or 3/8 in wire hook (Paracord Planet), plastic adjustable hook (Albright's) | designed | all |
| cord diameter 3/8 in | 3/8 in (9.52 mm) | 3/8 x 2-7/8 in metal coil hook (Albright's); Aircraft Spruce 3/8 in fastener PN 06-12900 | designed | all |
| cord diameter 1/2 in | 1/2 in (12.7 mm) | 1/2 in wire hook (Paracord Planet) or 1/2 x 2-7/8 in metal coil hook (Albright's) | designed | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Aircraft Spruce | Shock cord 1/8, 1/4, 5/16, 3/8, 1/2, 5/8 in; MIL-C-5651D Type I; certifiable sizes 1/4, 3/8, 1/2, 5/8 | web | Publisher's page; dimensions are facts |
| Albright's Supply | Bungee / shock cord 1/8, 3/16, 1/4, 5/16, 3/8 in and metal coil hooks 1/4, 3/8, 1/2 x 2-7/8 in, plastic adjustable hook | web | Publisher's page; dimensions are facts |
| Paracord Planet | Wire shock cord hooks, 10 pieces: 1/4 in hook for 3/16 cord, 5/16 for 5/16, 3/8 for 5/16, 1/2 for 1/2 | web | Publisher's page; dimensions are facts |
| McMaster-Carr | Bungee cord hooks (free STEP/IGES per part, for your own design use; no redistribution) | STEP, IGES, PDF | McMaster-Carr site terms: personal design use, no redistribution verify |
Xem scan
File coming
No downloadable true-size file yet: the published figures do not fix the whole shape, and Xem never guesses a number. A measured scan is planned; request it and it moves up.
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=bungee-shock-cord-diameters-and-hooks
Fits with
Questions
What diameters does shock cord come in?
1/8, 3/16, 1/4, 5/16, 3/8, 1/2 and 5/8 in across Aircraft Spruce and Albright's; MIL-C-5651D Type I certifiable sizes are 1/4, 3/8, 1/2, 5/8 in.
What hook goes on 1/4 inch shock cord?
Albright's lists a 1/4 x 2-7/8 in metal coil hook for 1/4 in cord; Paracord Planet pairs its 1/4 in hook with 3/16 in cord.
What hook goes on 5/16 inch shock cord?
Paracord Planet pairs both its 5/16 in and 3/8 in hooks with 5/16 in cord; Albright's plastic adjustable hook also fits 5/16 in.