Holo-krome 770508090 M5x0.8 Socket Cap Screw 90mm

Product Description

The HOLO-KROME 770508090 is a metric hex socket cap screw designed for precision fastening in industrial, mechanical, and trade applications. This cap screw features an M5 x 0.80 thread profile with a 90 mm length under the head and a partially threaded shank. It is manufactured from Austenitic Grade A4 stainless steel in a bright, uncoated finish, offering corrosion resistance suitable for demanding environments. Drive engagement is via an internal hex socket, requiring a standard hex key or Allen driver. Torque is applied cleanly without external wrench clearance, making it well-suited for recessed or close-tolerance assemblies where a low-profile fastening solution is needed.

This cap screw is applicable across a wide range of mechanical and trade installations, including HVAC equipment mounting, plumbing fixture assemblies, electrical enclosure fabrication, and general equipment maintenance. The A4 stainless steel grade makes it appropriate for use in wet, outdoor, or corrosive service environments. Partial threading on the shank provides a shoulder bearing surface, useful in applications requiring alignment or where clamping load distribution matters. It is typically installed by mechanical technicians, millwrights, or trade professionals working with metric-standard fastener systems.

Key Features

• M5 x 0.80 metric thread size with 90 mm length under head
• Partially threaded shank for shoulder bearing and alignment support
• Austenitic Grade A4 stainless steel construction for corrosion resistance
• Bright, uncoated finish — no added coating to affect thread fit
• Internal hex socket drive — compatible with standard hex key tooling
• Conforms to fastener standards ISO 3506-1 and ISO 4762

Compatibility

Designed as an ISO 4762 and ISO 3506-1 compliant metric hex socket cap screw, suitable for use in any application requiring an M5 x 0.80 partially threaded cap screw in Grade A4 stainless steel.

Installation Notes

Installation requires a properly sized metric hex key or bit driver matched to the M5 socket head. Power down or de-energize any associated equipment before fastening into electrical or mechanical assemblies. Do not mix metric and unified thread standards in the same assembly. When installing into corrosive or wet service locations, verify that mating tapped holes or nuts are also stainless steel or a compatible non-reactive material to avoid galvanic issues.