M4 12.9 Self Colour Socket Cap Bolts DIN 912

Product Description

M4 Grade 12.9 Self Colour Socket Cap Bolts With Shank

High-strength M4 socket head cap bolts manufactured from property class 12.9 steel with a self-colour, unplated finish. These fasteners have an internal hexagon drive and an unthreaded shank, making them suitable for machinery, automotive equipment, tooling and other highly loaded engineering assemblies.

• Thread size: M4
• Standard pitch: 0.7mm metric coarse
• Property class: 12.9
• Finish: Self colour / unplated
• Head style: Cylindrical socket head
• Drive: Internal hexagon
• Nominal hex key size: 3mm
• Construction: Part threaded with an unthreaded shank
• Available lengths: 30mm to 80mm
• Dimensional standard: DIN 912 / ISO 4762 pattern

Shank lengths are calculated by subtracting the listed 20mm thread length from the nominal overall length. Verify critical dimensions against the supplied fastener before use.

Property Class 12.9

Property class 12.9 provides very high tensile strength for demanding engineering applications. Correct tightening torque and preload depend on the joint design, mating-thread strength, lubrication and operating conditions. Seek qualified engineering guidance for safety-critical assemblies.

Self-Colour Finish

Self-colour steel is unplated and offers little inherent corrosion protection. Store these bolts in dry conditions and consider a suitable protective oil, coating or plated alternative where moisture or corrosive exposure is expected.

Useful Guides and Matching Components

• Matching metric nuts
• Washers
• Metric and imperial thread guide
• Fastener technical information

Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.