Coarse 3/8 Nylon Insert Lock Box/100

Overview The Coarse 3/8 Nylon Insert Lock Nut (03651) is designed for hardware fastening applications requiring resistance to loosening under vibrations and torque. Specification Value MPN 03651 Brand Midwest Fastener Corp Thread Size 3/8 Coarse Insert Type Nylon Package Quantity Box of 100 Weight 3.91 lb Package Dimensions 10.35 x 3.67 x 3.39 in Color Gray Technical Features Nylon insert locking mechanism: The embedded nylon collar creates friction against the bolt thread, resisting loosening caused by vibration and torque without requiring secondary locking hardware. 3/8 coarse thread pattern: Compatible with standard 3/8 coarse-thread fasteners, ensuring broad fitment across common hardware and structural applications. Box quantity of 100: Supplied in bulk packaging, reducing per-unit cost and ensuring sufficient stock for high-volume or repeat fastening tasks. Gray color designation: Provides visual identification for quick sorting and inventory management on the job site. Applications Mechanical assemblies subject to continuous vibration where fastener retention is critical. Structural connections requiring a secondary locking feature integrated directly into the nut. General hardware and construction applications using standard 3/8 coarse-thread bolt patterns. High-volume fastening projects where bulk packaging improves workflow efficiency.