GRADE 8 ALLOY STEEL CONSTRUCTION – Manufactured from quenched and tempered alloy steel to deliver high strength for demanding fastening applications where standard nuts are not sufficient. ENGINEERED HIGH-STRENGTH PERFORMANCE – Rated with a minimum tensile strength of 150,000 PSI, supporting secure clamping in heavy machinery, automotive, and industrial assemblies. NYLON INSERT LOCKING DESIGN – Integrated nylon insert grips the mating fastener threads to help prevent loosening caused by vibration and movement during operation. 3/8-16 USS COARSE THREAD – Standard 3/8-16 USS coarse thread provides compatibility with common bolts and machine screws used in mechanical and equipment applications. YELLOW CHROMATE ZINC COATING WITH BULK PACK – Yellow chromate zinc finish supports corrosion resistance and easy Grade 8 identification; bulk pack supports shop inventory, maintenance work, and repair operations. Grade 8 nylon insert lock nuts engineered for high-strength fastening applications where vibration resistance and secure thread retention are required.

Specifications
Thread size: 3/8-16 USS coarse thread
Nut type: Nylon insert lock nut (Nylock)
Grade: Grade 8
Material: Quenched and tempered alloy steel
Minimum tensile strength: 150,000 PSI
Finish: Yellow chromate zinc coating
Quantity: 50 pieces

Performance & Application Explanation
These Grade 8 Nylock hex nuts combine hardened alloy steel strength with a nylon insert that resists loosening due to vibration and operational movement. The nylon insert grips the fastener threads to help maintain clamp load in dynamic environments such as heavy machinery, automotive systems, and mechanical assemblies. The 3/8-16 USS coarse thread supports compatibility with common Grade 8 bolts and cap screws.

The quenched and tempered alloy steel construction delivers high tensile strength for demanding applications, while the yellow chromate zinc coating adds corrosion resistance and allows quick visual identification of Grade 8 hardware during installation and inspection.

B2B Use Cases
Commonly used in automotive repair, heavy machinery, equipment fabrication, agricultural machinery, and industrial maintenance environments where high-strength, vibration-resistant fasteners are required.

Quality & Trust Reassurance
Manufactured for consistent thread engagement, hardened strength, and dependable locking performance. Designed to meet the expectations of professional mechanics, fabricators, and maintenance teams working in high-load applications.