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#3 socket head cap screw envelope

#3 socket head cap screw envelope: head Ø4.09 mm (A max 0.161 in) x 2.51 mm (H max 0.099 in), hex socket 5/64 in across flats x 0.044 in deep (key engagement min), plain Ø2.515 mm shank (D max), example length under the head 0.25 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

size#3
TPI UNC / UNF48 / 56
body D max / min (in)0.0990 / 0.0949
head A max / min (in)0.161 / 0.154
head height H max / min (in)0.099 / 0.095
hex socket nominal5/64 in
key engagement T min (in)0.044
wall min (in)0.034
fillet transition dia max / min (in)0.115 / 0.103
top chamfer max (in)0.008
bottom chamfer max (in)0.007
basic thread length LT (in)—
D max (mm, computed)2.515
head dia x height max (mm, computed)4.09 x 2.51
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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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