Heat-set threaded inserts, inch: #2-56 to 3/8-16 and G1/8 (CNC Kitchen sizes) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/heat-set-inserts-inch/  (CC BY 4.0)
Basis: CNC Kitchen dimension poster (L, insert Ø D1, hole Ø D2, min wall W, blind hole ≥ L + 1); geometry drawn by Xem Studio from those numbers
Catalog version: 2026-10-20

Sizes: see table below
- Drawn as: lead-in pilot at the tip Ø over the bottom 15 % of the length, two knurl bands at the insert Ø with a relief groove between, thread as a plain bore at the minor diameter (threads not modelled). Knurl texture is not drawn: the insert Ø is the knurl's outside.
- Print the hole at the listed hole Ø, at least the insert length + 1 mm deep for a blind hole (room for displaced plastic), and keep at least W of wall around it. Press the insert in with a soldering iron and insert tip at the plastic's printing temperature until its top is flush.

thread  variant  length_mm  insert_od_mm  hole_mm  min_hole_depth_mm  min_wall_mm  min_boss_od_mm
#2-56  standard  3.2  3.6  3.2  4.2  1.3  5.8
#4-40  standard  5.7  4.6  4.0  6.7  1.6  7.2
#4-40  short  3.6  4.6  4.0  4.6  1.6  7.2
#6-32  standard  7.1  5.4  4.8  8.1  1.8  8.4
#6-32  short  3.8  5.4  4.8  4.8  1.8  8.4
#8-32  standard  8.2  6.3  5.7  9.2  2.1  9.9
#8-32  short  4.7  6.3  5.7  5.7  2.1  9.9
#10-24  standard  9.5  7.1  6.5  10.5  2.6  11.7
#10-32  standard  9.5  7.1  6.5  10.5  2.6  11.7
1/4-20  standard  12.7  8.7  8.1  13.7  3.3  14.7
1/4-20  short  6.4  8.7  8.1  7.4  3.3  14.7
5/16-18  standard  12.7  10.2  9.7  13.7  4.5  18.7
3/8-16  standard  12.7  12.5  12.0  13.7  6.0  24.0
G1/8  standard  12.7  12.5  12.0  13.7  6.0  24.0

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- CNC Kitchen: Threaded insert dimensions and design guidelines poster: L, D1 (insert Ø), D2 (hole Ø), W (min wall); blind hole min. L + 1 mm — PDF — maker's sheet; dimensions cited, nothing copied — https://cdn.shopify.com/s/files/1/0654/4821/4767/files/Poster_Dimensions-Guidlines.pdf?v=1751444185

Free files (CC BY 4.0, Xem Studio; STEP + STL, 14 parts): https://xemstudio.com/files/hardware/heat-set-inserts-inch/index.json
API: https://xemstudio.com/api/geometry?object=heat-set-inserts-inch