Xem Studiomeasured geometry

Library › Hardware › Fasteners ·

Set screws (grub screws), M3–M8 (ISO 4026)

What size set screw holds a 5 mm shaft coupler or pulley? · Hardware · basis: ISO 4026 flat point, hex socket

Long Earth Society build part. Lock gears, discs and flywheels to shafts. The engines · all LES parts

sizes
5 in table

Notes

  • Headless; the whole length is thread. Used to lock pulleys, couplers and collars onto shafts: use two at 90° and seat one on the shaft's D-flat.
  • Hex keys: M3 1.5, M4 2, M5 2.5, M6 3, M8 4 mm. Cup and dog points exist; flat point is the common one in printer kits.

Sizes

threadhex_key_mmcommon_lengths_mm
M31.53, 4, 5, 6, 8, 10
M42.04, 5, 6, 8, 10, 12
M52.55, 6, 8, 10, 12
M63.06, 8, 10, 12, 16
M84.08, 10, 12, 16, 20

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

McMaster-CarrSocket head screws (free STEP/IGES/STL per part, for your own design use; no redistribution)STEP, IGES, STL, PDFMcMaster-Carr site terms: personal design use, no redistribution verify
WikipediaScrewwebCC BY-SA 4.0 (text)

Free files

★ Free files 27 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

set-m3x3ISO 4026 M3 × 3 flat point, 1.5 mm keySTEP · STL
set-m3x4ISO 4026 M3 × 4 flat point, 1.5 mm keySTEP · STL
set-m3x5ISO 4026 M3 × 5 flat point, 1.5 mm keySTEP · STL
set-m3x6ISO 4026 M3 × 6 flat point, 1.5 mm keySTEP · STL
set-m3x8ISO 4026 M3 × 8 flat point, 1.5 mm keySTEP · STL
set-m3x10ISO 4026 M3 × 10 flat point, 1.5 mm keySTEP · STL
set-m4x4ISO 4026 M4 × 4 flat point, 2.0 mm keySTEP · STL
set-m4x5ISO 4026 M4 × 5 flat point, 2.0 mm keySTEP · STL
set-m4x6ISO 4026 M4 × 6 flat point, 2.0 mm keySTEP · STL
set-m4x8ISO 4026 M4 × 8 flat point, 2.0 mm keySTEP · STL
set-m4x10ISO 4026 M4 × 10 flat point, 2.0 mm keySTEP · STL
set-m4x12ISO 4026 M4 × 12 flat point, 2.0 mm keySTEP · STL
set-m5x5ISO 4026 M5 × 5 flat point, 2.5 mm keySTEP · STL
set-m5x6ISO 4026 M5 × 6 flat point, 2.5 mm keySTEP · STL
set-m5x8ISO 4026 M5 × 8 flat point, 2.5 mm keySTEP · STL
set-m5x10ISO 4026 M5 × 10 flat point, 2.5 mm keySTEP · STL
set-m5x12ISO 4026 M5 × 12 flat point, 2.5 mm keySTEP · STL
set-m6x6ISO 4026 M6 × 6 flat point, 3.0 mm keySTEP · STL
set-m6x8ISO 4026 M6 × 8 flat point, 3.0 mm keySTEP · STL
set-m6x10ISO 4026 M6 × 10 flat point, 3.0 mm keySTEP · STL
set-m6x12ISO 4026 M6 × 12 flat point, 3.0 mm keySTEP · STL
set-m6x16ISO 4026 M6 × 16 flat point, 3.0 mm keySTEP · STL
set-m8x8ISO 4026 M8 × 8 flat point, 4.0 mm keySTEP · STL
set-m8x10ISO 4026 M8 × 10 flat point, 4.0 mm keySTEP · STL
set-m8x12ISO 4026 M8 × 12 flat point, 4.0 mm keySTEP · STL
set-m8x16ISO 4026 M8 × 16 flat point, 4.0 mm keySTEP · STL
set-m8x20ISO 4026 M8 × 20 flat point, 4.0 mm keySTEP · STL

Plain text: sheet.txt · JSON: /api/geometry?object=set-screws-metric

Set screws (grub screws), M3–M8 (ISO 4026), isometric render of a generated part
Render of set-m4x6 from the free STEP; not to scale.

Fits with

GT2 timing pulleys, 16T–60T (2 mm pitch), isometric render of a generated part
GT2 timing pulleys, 16T–60T (2 mm pitch)7 sizes★ 7 files
Flexible shaft couplers, 5–10 mm bores, isometric render of a generated part
Flexible shaft couplers, 5–10 mm bores6 sizes★ 6 files
NEMA 17 stepper motor, isometric render of a generated part
NEMA 17 stepper motor42.3×42.3 mm★ 3 files
Socket head cap screws, M2–M8 (ISO 4762 / DIN 912), isometric render of a generated part
Socket head cap screws, M2–M8 (ISO 4762 / DIN 912)7 sizes★ 47 files

Questions

What set screw do GT2 pulleys use?

M3 × 3 or M3 × 4, two per pulley at 90°, 1.5 mm hex key.

What size set screw for a 5 mm to 8 mm coupler?

M4 × 5 or M4 × 6, 2 mm hex key; most aluminium couplers come with them.