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7/8 socket head cap screw envelope

7/8 socket head cap screw envelope: head Ø33.32 mm (A max 1.312 in) x 22.22 mm (H max 0.875 in), hex socket 3/4 in across flats x 0.432 in deep (key engagement min), plain Ø22.225 mm shank (D max), example length under the head 2.0 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

size7/8
TPI UNC / UNF9 / 14
body D max / min (in)0.8750 / 0.8647
head A max / min (in)1.312 / 1.293
head height H max / min (in)0.875 / 0.864
hex socket nominal3/4 in
key engagement T min (in)0.432
wall min (in)0.333
fillet transition dia max / min (in)0.963 / 0.933
top chamfer max (in)0.100
bottom chamfer max (in)0.020
basic thread length LT (in)2.250
D max (mm, computed)22.225
head dia x height max (mm, computed)33.32 x 22.22
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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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