Holo-krome 770407040 M4 X 0.70 Hex Socket Cap Screw

Product Description

The HOLO-KROME 770407040 is a metric hex socket cap screw in M4 x 0.70 thread size with a 40 mm length under head. It is manufactured from Austenitic Grade A4 stainless steel with a bright, uncoated finish, making it well suited for corrosive or washdown environments. The drive is an internal hex socket, requiring an Allen key or hex bit for installation. This fastener is partially threaded and conforms to ISO 4762 and ISO 3506-1 standards. It is used by mechanical contractors, millwrights, equipment service technicians, and industrial maintenance professionals wherever a clean, corrosion-resistant cap screw is specified.

This screw is a standard metric fastener appropriate for light mechanical assemblies, equipment enclosures, machine frames, and similar applications where M4 thread pitch and stainless steel construction are required. The Grade A4 austenitic alloy provides strong resistance to rust and chemical exposure, making it a common choice in food-processing, marine, and outdoor equipment installations. Minimum order quantity is 10 pieces.

Key Features

• M4 x 0.70 thread with 40 mm length under head for precise fitment in metric assemblies
• Austenitic Grade A4 stainless steel construction for corrosion and chemical resistance
• Internal hex socket drive for high torque application with standard Allen keys or hex bits
• Bright uncoated finish — no coating to crack, chip, or introduce dimensional variation
• Partially threaded shank for load-bearing shoulder engagement in clearance-hole applications
• Conforms to ISO 4762 and ISO 3506-1 fastener standards

Compatibility

Designed as an ISO 4762 metric hex socket cap screw for use in any M4 x 0.70 tapped hole requiring a stainless steel fastener. Verify thread engagement depth and clearance hole sizing against the assembly drawing before installation.

Installation Notes

Installation is performed with the appropriately sized hex key or Allen bit driver; use of an undersized key risks rounding the socket. Confirm thread engagement meets a minimum of 1.0 times the screw diameter in the tapped material before final torque. Stainless steel fasteners are susceptible to galling — apply an appropriate anti-seize compound to the threads when installing into stainless steel tapped holes. Follow applicable machinery safety lockout procedures before fastener replacement on live equipment.