Heat-Set Insert Hole Size Chart

Install-hole diameter, pocket depth and minimum wall for 15 metric and imperial screw sizes. The pocket bore is smaller than the insert on purpose - displaced plastic fills the knurling.

Size	Pocket bore	Depth	Min wall
Metric
M2-0.4	3.2 mm	4.44 mm	1.6 mm
M2.5-0.45	4 mm	6.58 mm	2 mm
M3-0.5	4 mm	6.5 mm	2 mm
M4-0.7	5.7 mm	8.94 mm	2.9 mm
M5-0.8	6.5 mm	10.55 mm	3.2 mm
M6-1.0	8.1 mm	13.72 mm	4 mm
M8-1.25	9.7 mm	15.29 mm	4.8 mm
Imperial
#2-56	0.126 in	0.228 in	0.063 in
#4-40	0.157 in	0.259 in	0.079 in
#6-32	0.189 in	0.29 in	0.095 in
#8-32	0.224 in	0.352 in	0.112 in
#10-24	0.256 in	0.415 in	0.128 in
#10-32	0.256 in	0.415 in	0.128 in
1/4-20	0.319 in	0.54 in	0.16 in
1/4-28	0.319 in	0.54 in	0.16 in

Standard insert series; pocket bore per CNC Kitchen. Extra series (e.g. VORON) are in the app. Printed-hole error measurements: the open dataset. Pocket patterns that survive a machine you do not control: the printed holes that fit guide.

Metric and imperial clearances follow published mechanical-engineering references · heat-set pockets per CNC Kitchen · bearing housing seats follow published fit tables. Reference only - verify before you cut.

Heat-set insert hole size chart