Library › Hardware › Heat-set insert holes: hole cutters and test bosses for every insert…

1/4-20 × 6.4 hole cutter

1/4-20 × 6.4 hole cutter: Ø8.1 × 7.4 (subtract from your part, top at z = 0)

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

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

Dimensions

thread	1/4-20
insert_length_mm	6.4
hole_mm	8.1
hole_depth_mm	7.4
boss_od_mm	14.7

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From the full sheet

Heat-set insert holes: hole cutters and test bosses for every insert size: every size, notes, mating features and sources. How do I model the hole for a heat-set insert?

Other sizes

M2 × 3 hole cutter
M2 × 3 test boss
M2.5 × 4 hole cutter
M2.5 × 4 test boss
M3 × 5.7 hole cutter
M3 × 5.7 test boss
M3 × 3 hole cutter
M3 × 3 test boss
M3 × 4 hole cutter
M3 × 4 test boss
M4 × 8.1 hole cutter
M4 × 8.1 test boss
M4 × 4 hole cutter
M4 × 4 test boss
M5 × 9.5 hole cutter
M5 × 9.5 test boss
M5 × 5.8 hole cutter
M5 × 5.8 test boss
M6 × 12.7 hole cutter
M6 × 12.7 test boss
M8 × 12.7 hole cutter
M8 × 12.7 test boss
M10 × 12.7 hole cutter
M10 × 12.7 test boss
#2-56 × 3.2 hole cutter
#2-56 × 3.2 test boss
#4-40 × 5.7 hole cutter
#4-40 × 5.7 test boss
#4-40 × 3.6 hole cutter
#4-40 × 3.6 test boss
#6-32 × 7.1 hole cutter
#6-32 × 7.1 test boss
#6-32 × 3.8 hole cutter
#6-32 × 3.8 test boss
#8-32 × 8.2 hole cutter
#8-32 × 8.2 test boss
#8-32 × 4.7 hole cutter
#8-32 × 4.7 test boss
#10-24 × 9.5 hole cutter
#10-24 × 9.5 test boss
#10-32 × 9.5 hole cutter
#10-32 × 9.5 test boss
1/4-20 × 12.7 hole cutter
1/4-20 × 12.7 test boss
1/4-20 × 6.4 test boss
5/16-18 × 12.7 hole cutter
5/16-18 × 12.7 test boss
3/8-16 × 12.7 hole cutter
3/8-16 × 12.7 test boss
G1/8 × 12.7 hole cutter
G1/8 × 12.7 test boss