{"product_id":"value-collection-1-kn-31c-k-lock-hex-nut-5-16-18-ss-18-8","title":"Value Collection 1-KN-31C K-lock Hex Nut 5\/16-18 Ss 18-8","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 1-KN-31C is a K-Lock hex nut with an integrated external tooth lock washer, manufactured from 18-8 stainless steel. This one-piece fastener combines a standard UNC hex nut with a serrated lock washer that bites into the mating surface under torque, resisting loosening caused by vibration. The 5\/16-18 thread size covers a wide range of light structural and mechanical assembly applications. At 0.328 inches overall height and a 0.5-inch width across flats, it fits standard 1\/2-inch drive or wrench tooling. The uncoated 18-8 stainless construction provides corrosion resistance suitable for outdoor and wet-environment installations. Licensed tradespeople and maintenance technicians reach for this hardware when a reliable locking fastener is needed without a separate lock washer component.\u003c\/p\u003e\u003cp\u003eThis fastener is suited for residential and light commercial mechanical, electrical, and plumbing panel assemblies, equipment mounting, and any application requiring vibration-resistant fastening in corrosive or high-humidity environments. The external tooth design creates multiple contact points around the washer perimeter, making it a practical choice for grounding connections, sheet metal assemblies, and equipment enclosures where a smooth bearing surface is not required. Sold in a minimum order quantity of 25 pieces per order.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eOne-piece K-Lock design combines hex nut and external tooth lock washer — no separate washer needed\u003c\/li\u003e\n\u003cli\u003e5\/16-18 UNC thread for compatibility with standard fractional fastener applications\u003c\/li\u003e\n\u003cli\u003e18-8 stainless steel construction resists corrosion in wet and outdoor environments\u003c\/li\u003e\n\u003cli\u003eExternal tooth lock washer digs into mating surface to resist vibration-induced loosening\u003c\/li\u003e\n\u003cli\u003eUncoated finish — no plating to crack, chip, or add galvanic incompatibility concerns\u003c\/li\u003e\n\u003cli\u003eCompact 0.328-inch height suits space-constrained assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with 5\/16-18 UNC threaded fasteners in standard fractional mechanical and electrical assemblies where an external tooth locking washer interface is appropriate.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires a standard 1\/2-inch wrench or socket. Power down or de-energize any equipment before fastening hardware on electrical enclosures or panels, in accordance with NFPA 70 (NEC) lockout\/tagout requirements. Do not overtorque stainless steel fasteners, as galling can occur — apply an anti-gall lubricant when assembling stainless-to-stainless joints. Ensure the tooth washer face contacts the workpiece surface directly for effective locking action.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNut Type\u003c\/strong\u003e: K-Lock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLock Washer Type\u003c\/strong\u003e: External Tooth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Height\u003c\/strong\u003e: 0.328 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWasher Outside Diameter\u003c\/strong\u003e: 0.5781 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: 18-8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.0118 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: VALUE COLLECTION\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1-KN-31C\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51701143241010,"sku":"1-KN-31C","price":1717.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3e56682a0960754609d53360e40f3f3e.jpg?v=1788398782","url":"https:\/\/voomisupply.com\/products\/value-collection-1-kn-31c-k-lock-hex-nut-5-16-18-ss-18-8","provider":"Voomi Supply","version":"1.0","type":"link"}