{"product_id":"hex-lock-nuts-nylon-insert-grade-c-medium-carbon-phosphate-oil-5-16-18_31nscbb","title":"[100 PKG] Hex Lock Nuts Nylon Insert Grade C Medium Carbon Phosphate Oil 5\/16-18","description":"\u003cdiv\u003e\n\u003cp\u003eSecure, vibration-resistant fastening with a Nylon Insert Hex Lock Nut. These Hex Lock Nuts Nylon Insert Grade C are engineered from Grade C medium carbon steel and finished with black phosphate and oil for durable corrosion resistance in demanding environments. The integral nylon insert provides a reliable locking mechanism that resists loosening under vibration and dynamic loads, making them ideal for automotive, machinery, and equipment assemblies. Threaded to 5\/16-18, they are designed to pair with standard 5\/16-18 bolts for a secure fit.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cb\u003eLocking mechanism:\u003c\/b\u003e Integrated nylon insert prevents loosening from vibration and repeated cycling.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eMaterial:\u003c\/b\u003e Grade C medium carbon steel for dependable strength.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eFinish:\u003c\/b\u003e Black phosphate with oil for corrosion protection and lubricity.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eThread size:\u003c\/b\u003e 5\/16-18 UNC, compatible with standard fasteners.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eType:\u003c\/b\u003e Hex lock nut for easy wrench access with common tools.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eApplications:\u003c\/b\u003e Automotive, industrial machinery, equipment assemblies, and other vibration-prone installations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eTo maximize performance, install with proper torque according to the bolt specification and avoid overtightening. Inspect nylon insert for wear and replace if damaged to maintain locking capability. Store in a dry environment to extend service life.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e \u003cp\u003e\u003cb\u003eThread size:\u003c\/b\u003e 5\/16-18\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Mutual Screw","offers":[{"title":"Default Title","offer_id":50379645583639,"sku":"31NSCBB","price":34.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/1125\/5063\/files\/M18D985BB_45560b6e-f974-4f80-bb1c-d421d6dbcb12.jpg?v=1744922732","url":"https:\/\/mutualscrew.com\/products\/hex-lock-nuts-nylon-insert-grade-c-medium-carbon-phosphate-oil-5-16-18_31nscbb","provider":"Mutual Screw \u0026 Supply","version":"1.0","type":"link"}