- Gears and pulleys
- Shaft collars
- Adjusting rings
- Locking bushes

Product Overview & Description
M3 x 6mm Grub Screw – Grade 12.9 Black Oxide is a metric fastener selected for compact mechanical assemblies, maintenance and general engineering use.
Key specifications
- Thread / size: M3
- Length: 6 mm
- Thread pitch: 0.50 mm
- Material: High Tensile Alloy Steel
- Head style: Headless / Set Screw
- Drive: Internal Hex (Allen)
- Finish / coating: Black Oxide
- Strength grade: 12.9
- Recommended tool: 1.5 mm Allen key
Typical applications
- Gears and pulleys
- Shaft collars
- Adjusting rings
- Locking bushes
Headless grub screw for locking one component against another. M3 coarse pitch is 0.50 mm.
Technical Specifications & Dimensions
Engineered fastener properties, thread tolerances, and tooling standards.
Thread SizeM3
Length6 mm
MaterialHigh Tensile Alloy Steel
Head StyleHeadless / Set Screw
Drive StyleInternal Hex (Allen)
Finish / CoatingBlack Oxide
Thread Pitch0.50 mm
Strength Grade12.9
Fastener TypeGrub / Set Screw
Family / Series CodeGRB-M3-129-BLK
Thread DirectionRight Hand
Thread CoverageFully Threaded
Recommended Tool1.5 mm Allen key
Engineering & Application Notes
Headless grub screw for locking one component against another. M3 coarse pitch is 0.50 mm.
Applications, Installation & Handling
Practical engineering instructions, driver tooling advice, and care recommendations.
1 grub screw
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