Hex nuts, inch: #4-40 to 3/4-10 (ASME B18.2.2) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/hex-nuts-inch/  (CC BY 4.0)
Basis: ASME B18.2.2 finished hex nuts and machine screw nuts: width across flats F, thickness H
Catalog version: 2026-10-20

Sizes: see table below
- Threads are plain cylinders at the major diameter, as every thread on this site. The bore is the major diameter.

thread  af_in  thickness_in
1/4-20  0.4375  0.2188
5/16-18  0.5  0.2656
3/8-16  0.5625  0.3281
7/16-14  0.6875  0.375
1/2-13  0.75  0.4375
5/8-11  0.9375  0.5469
3/4-10  1.125  0.6406
#4-40  0.25  0.0938
#6-32  0.3125  0.1094
#8-32  0.3438  0.125
#10-24  0.375  0.125
#10-32  0.375  0.125

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- ASME: ASME B18.2.2 Nuts for general applications (inch) — standard — ASME; dimensions are facts [verify license at link] — https://www.asme.org/codes-standards/find-codes-standards/b18-2-2-nuts-for-general-applications-machine-screw-nuts-hex-square-hex-flange-coupling-nuts-(inch-series)

Free files (CC BY 4.0, Xem Studio; STEP + STL, 12 parts): https://xemstudio.com/files/hardware/hex-nuts-inch/index.json
API: https://xemstudio.com/api/geometry?object=hex-nuts-inch