Midwest Fasteners Grade 8 Yellow Zinc Plated Steel Nylon Insert Lock Nut

Midwest Fasteners Grade 8 Yellow Zinc Plated Steel Nylon Insert Lock Nut

Midwest Fasteners' Grade 8 yellow zinc plated steel nylon insert lock nut is built for applications where a standard hex nut isn't enough to keep a bolted connection tight. This family is available across coarse-thread sizes from 5/16"-18 through 1/2"-13, with every size sharing the same Grade 8 rating, steel construction, and yellow zinc finish for a consistent, corrosion-resistant, gold-toned part regardless of which size you order. The nylon insert resists loosening from vibration and repeated load cycling, making this lock nut family a reliable upgrade over a plain hex nut in higher-load fastening work.

Key Features

• Size Range: Coarse-thread sizes from 5/16"-18 through 1/2"-13, selectable per order.
• Material & Finish: Steel body with a yellow zinc finish for corrosion resistance and a gold appearance across every size.
• Grade: Grade 8 rating on every size in the family, suited to higher-strength fastening applications.
• Type: Nylon insert lock nut that resists loosening under vibration and repeated load cycling better than a plain hex nut.
• Thread: Coarse thread across the size range for general-purpose fastening and easier field assembly.
• Consistent Design: The same Grade 8 steel body and nylon insert locking mechanism carries across all available sizes, so performance characteristics stay consistent as you move between sizes.

Technical Specifications

• Product Type: Nylon Insert Lock Nut
• Product Finish: Yellow Zinc
• Grade: Grade 8
• Country of Origin: China
• Product Material: Steel
• Product Color: Gold
• Size Range: 5/16"-18, 3/8"-16, 1/2"-13

Typical Applications

• Securing bolted connections in machinery and equipment subject to vibration
• Automotive and trailer chassis fastening where loosening would be a safety concern
• Structural and fabrication assemblies requiring a Grade 8 rated nut
• General maintenance and repair work across a range of common fastener sizes
• Projects needing a consistent Grade 8 lock nut across multiple hole sizes

Why Midwest Fasteners?

Midwest Fasteners manufactures this lock nut family to Grade 8 specifications in steel with a yellow zinc finish, giving contractors and maintenance techs a consistent, corrosion-resistant fastener for vibration-prone assemblies across sizes from 5/16"-18 to 1/2"-13. The nylon insert design delivers a dependable locking action without relying on thread deformation, and the Grade 8 rating supports demanding, higher-load fastening work regardless of which size you need for the job on any assembly where a plain hex nut would eventually back off.