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3/8 socket head cap screw envelope

3/8 socket head cap screw envelope: head Ø14.27 mm (A max 0.562 in) x 9.52 mm (H max 0.375 in), hex socket 5/16 in across flats x 0.182 in deep (key engagement min), plain Ø9.525 mm shank (D max), example length under the head 1.0 in (Xem's choice); no thread, top chamfer, fillet or socket cone

Exact dimensions. True size, no tolerance added. Threads are plain cylinders at the major diameter.

STEP STL free, CC BY 4.0 (credit "Xem Studio")

Dimensions

size3/8
TPI UNC / UNF16 / 24
body D max / min (in)0.3750 / 0.3678
head A max / min (in)0.562 / 0.550
head height H max / min (in)0.375 / 0.368
hex socket nominal5/16 in
key engagement T min (in)0.182
wall min (in)0.143
fillet transition dia max / min (in)0.415 / 0.398
top chamfer max (in)0.040
bottom chamfer max (in)0.010
basic thread length LT (in)1.250
D max (mm, computed)9.525
head dia x height max (mm, computed)14.27 x 9.52
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From the full sheet

Socket head cap screws, inch #0 to 1-1/2 (ASME B18.3): head, hex socket, key engagement — full size table + models #0 to 1: every size, notes, mating features and sources. What are the head diameter, head height and hex key size of a #4-40, #8-32, 1/4-20, 5/8-11 or 1 in socket head cap screw?

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