Midwest Fasteners Grade 8 Zinc Plated Steel Vibration-Resistant Lock Washer

Midwest Fasteners Grade 8 Zinc Plated Steel Vibration-Resistant Lock Washer

The Midwest Fasteners Grade 8 Zinc Plated Steel Vibration-Resistant Lock Washer is engineered to resist loosening under vibration and help maintain clamp load on bolted connections. Manufactured from Grade 8 steel for higher strength than standard washers, this lock washer is built to pair with matching high-strength fasteners in applications where joint integrity is critical. The zinc plated finish adds a layer of corrosion resistance suited to typical indoor and light outdoor conditions, and the washer is available across a size range from 1/4" x 31/64" up to 5/16" x 19/32" to fit a variety of bolt diameters. Each washer is sold individually to help maintain proper fastener tension in demanding assembly, repair, and maintenance work.

Key Features

• Washer Size Range: Available from 1/4" x 31/64" through 5/16" x 19/32" to match common Grade 8 bolt diameters.
• Grade: Grade 8 steel construction for use with high-strength bolted connections.
• Material & Finish: Steel body with a Zinc Plated finish for added corrosion resistance.
• Type: Lock washer designed to resist loosening from vibration and maintain fastener tension.
• Compatibility: Matched to Grade 8 hardware for applications requiring consistent clamp load retention.
• Finish Consistency: Zinc plating applied uniformly for predictable performance across the batch and across every size option.
• Package: Sold individually (Each).

Technical Specifications

• Product Type: Lock Washer
• Product Finish: Zinc Plated
• Grade: Grade 8
• Country of Origin: China
• Product Material: Steel
• Washer Size Options: 1/4" x 31/64", 3/8" x 11/16", 5/16" x 19/32"

Typical Applications

• Securing Grade 8 bolted connections subject to vibration or dynamic loads
• Machinery and equipment assembly where fastener loosening is a concern
• Structural and mechanical repair work requiring high-strength hardware
• General maintenance tasks involving zinc plated steel fasteners
• Fabrication projects needing reliable clamp load retention across multiple bolt sizes

Why Midwest Fasteners?

Midwest Fasteners manufactures this lock washer from Grade 8 steel with a zinc plated finish, giving contractors and maintenance techs a dependable option for high-strength bolted assemblies across a full range of sizes from 1/4" x 31/64" to 5/16" x 19/32". Consistent sizing, material, and finish make it suitable for professional repair, fabrication, and maintenance work where fastener loosening cannot be tolerated. Choosing a Grade 8 rated washer with a protective zinc finish helps ensure the washer matches the strength class of the bolts and nuts it is paired with, whether the job is routine maintenance or a high-vibration mechanical assembly.