Gibraltar 63601G M6 Flat Washer Case Hardened Steel

Product Description

The GIBRALTAR 63601G is a standard flat washer designed for use with M6 metric screws. Manufactured from case-hardened 1010 steel with a black oxide finish, this washer distributes fastener load across a wider surface area and helps prevent pull-through, surface damage, and fastener loosening under vibration. The black oxide coating provides a moderate level of corrosion resistance while maintaining close dimensional tolerances. With a 7mm inside diameter, 16mm outside diameter, and 3mm thickness, it meets standard metric fastening requirements and is commonly installed by electricians, HVAC technicians, plumbers, and mechanical contractors working on equipment assemblies and structural fastening applications.

This washer is suited for general-purpose metric fastening in both light commercial and residential applications. It is commonly used in equipment panel assembly, pipe support bracketing, conduit mounting, and mechanical component fastening wherever an M6 bolt or screw requires load distribution. The case-hardened construction makes it appropriate for higher-clamping-force applications where a standard mild steel washer may deform under torque. The black oxide finish blends with dark hardware and equipment enclosures.

Key Features

• Case-hardened 1010 steel construction resists deformation under clamping load
• Black oxide finish provides corrosion resistance and a low-reflectance appearance
• 7mm inside diameter fits M6 metric screws and bolts
• 16mm outside diameter provides effective load distribution across the fastening surface
• 3mm thickness adds rigidity for use in high-torque metric fastening applications
• Metric system dimensioning consistent with ISO hardware standards

Compatibility

Designed as a standard flat washer for use with M6 metric fasteners in general mechanical, electrical, and plumbing equipment assembly applications.

Installation Notes

Installation does not require specialized tools beyond a standard metric wrench or socket set. Always de-energize electrical equipment and shut off fluid systems before disassembling any fastened assembly. Follow applicable NEC or IPC requirements when fastening within electrical enclosures or plumbing supports. Do not substitute this metric washer in applications specifying SAE or USS inch-series hardware.