Value Collection 31487 Flat Washer Vulcanized Fiber 1 in Id 25 Pack

Product Description

The VALUE COLLECTION 31487 is a standard flat washer made from vulcanized fiber with a plain finish. It features a 1 inch inside diameter, a 1.3125 inch outside diameter, and a thickness of 0.062 inches. Vulcanized fiber is a dense, layered material known for its electrical insulating properties, mechanical toughness, and resistance to oils and solvents. This washer is designed to distribute load under a fastener head or nut, provide a seating surface, and serve as an electrical or thermal isolator in fastened assemblies. Electricians, mechanical assemblers, and maintenance technicians commonly install this type of washer in panel, enclosure, and equipment-mounting applications.

This washer is suited for use in electrical enclosures, control panels, switchgear assemblies, and general mechanical assemblies where a non-metallic, insulating washer is required. The vulcanized fiber construction meets MIL-I-24768 and 27 GEE-F (G10 and FR-4) fastener standards, making it appropriate for applications requiring compliance with military or industrial fiber insulation specifications. It is sold in packages of 25 and follows inch-system dimensional standards.

Key Features

• Vulcanized fiber construction provides electrical insulation and mechanical load distribution
• 1 inch inside diameter fits standard 1 inch fastener shanks
• 1.3125 inch outside diameter provides broad bearing surface relative to the fastener size
• 0.062 inch thickness suits tight-clearance assemblies
• Plain finish with no coating, suitable for direct contact with insulating or non-conductive surfaces
• Meets MIL-I-24768 and 27 GEE-F (G10 and FR-4) fastener standards
• Sold in packs of 25 for shop and field stocking

Compatibility

Designed as an OEM-style and replacement flat washer for use with 1 inch nominal fasteners in inch-system assemblies requiring a vulcanized fiber insulating washer per MIL-I-24768 and 27 GEE-F (G10 and FR-4) specifications.

Installation Notes

Installation is performed by electricians, mechanical assemblers, or maintenance technicians working on fastened assemblies. De-energize all circuits and isolate the assembly from power sources before installing washers in electrical enclosures or panel applications. Vulcanized fiber washers should not be over-torqued, as the material can compress and crack under excessive clamp load. Verify dimensional fit against the fastener and mating hardware before final assembly.