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M10 set / grub screw size

5 mm Allen key
hex key size for M10 set screw

M10 set screw — Heavy shaft collars, pulleys, gears.

Full specification

SystemMetric coarse
Nominal diameter10 mm
Thread pitch1.5 mm
Allen key / hex socket5 mm
Tap drill8.5 mm
Clearance hole11 mm
Common grade / class12.9
Typical torque35 Nm (25.8 ft·lb)

About M10 set screws

Heavy shaft collars, pulleys, gears.

Set screws (also called grub screws) are headless screws with a hexagonal socket. They are used to secure an object within or against another object. Common applications include securing pulleys, gears, and collars to shafts.

Grade 12.9 indicates high-strength alloy steel for demanding applications.

Frequently asked questions

What size Allen key fits M10 set screw?
M10 set screw uses a 5 mm Allen key.
What is the torque for M10 set screw?
Typical torque for M10 set screw in 12.9 is about 35 Nm (25.8 ft·lb).
What are set screws used for?
M10 set screws are used in heavy shaft collars, pulleys, gears.