Gibraltar 63602G M8 Standard Flat Washer Black Oxide

Product Description

The GIBRALTAR 63602G is a metric M8 standard flat washer manufactured from case-hardened 1010 steel with a black oxide finish. It measures 9 mm inside diameter, 19 mm outside diameter, and 3 mm thick, converting to approximately 0.35 inches ID, 0.75 inches OD, and 0.12 inches thick. The case-hardening process increases surface hardness and wear resistance, while the black oxide coating provides mild corrosion resistance and a consistent dark appearance. This washer is used to distribute fastener load across a bearing surface and is suited for metric fastener assemblies in mechanical, structural, and industrial applications. Installation is performed by mechanical tradespeople and assembly technicians working with M8 fasteners.

The 63602G is appropriate for use wherever an M8 screw or bolt requires a standard flat washer to spread clamp load, protect the mating surface, or provide a consistent seating plane. Typical applications include equipment assembly, structural steel connections, and general mechanical fastening in metric-spec assemblies. The black oxide finish makes it a practical choice in applications where a dark, low-reflectance fastener component is preferred. Sold individually, with a minimum order quantity of 10 pieces.

Key Features

• Case-hardened 1010 steel construction for improved surface hardness and durability
• Black oxide finish for mild corrosion resistance and uniform dark appearance
• Standard flat washer geometry: 9 mm ID, 19 mm OD, 3 mm thick
• Metric sizing for M8 screw applications
• Distributes fastener load to protect mating surfaces and reduce stress concentration

Compatibility

Designed as a standard flat washer for M8 metric fasteners in general mechanical and structural assembly applications.

Installation Notes

Install over the M8 fastener shank before seating the nut or bolt head against the bearing surface. Ensure the washer sits flat with no debris between it and the mating surface. Follow applicable torque specifications for the M8 fastener being used as defined by the assembly drawing or relevant mechanical standard. No special tools are required beyond standard hand or power wrenching equipment.