{"product_id":"value-collection-31-nu-25c-hex-lock-nut-1-4-20-18-8-ss","title":"Value Collection 31-NU-25C Hex Lock Nut 1\/4-20 18-8 Ss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 31-NU-25C is a 1\/4-20 UNC heavy hex lock nut with a nylon insert locking mechanism, manufactured from 18-8 stainless steel with a bright, uncoated finish. The nylon insert compresses against mating threads under torque, creating mechanical resistance to loosening from vibration and thermal cycling. At 3\/8 inches tall with a 1\/2-inch width across flats, this fastener is sized for standard 1\/4-20 threaded assemblies. It is installed by licensed tradespeople and maintenance professionals across HVAC, plumbing, and general mechanical applications where stainless corrosion resistance is required.\u003c\/p\u003e\n\u003cp\u003eThis lock nut is suited for indoor and outdoor installations where fastener corrosion is a concern, including equipment mounting, panel assembly, and mechanical connections exposed to moisture or mild chemicals. The 18-8 stainless steel grade provides solid resistance to rust and oxidation without a surface coating. The right-hand thread direction follows standard UNC fastener convention. Applications span residential and light commercial mechanical systems, structural brackets, and equipment frame assemblies requiring reliable thread retention.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eNylon insert locking style resists loosening from vibration and thermal cycling\u003c\/li\u003e\n  \u003cli\u003e18-8 stainless steel construction for corrosion resistance without a coating\u003c\/li\u003e\n  \u003cli\u003e1\/4-20 UNC thread size with right-hand thread direction\u003c\/li\u003e\n  \u003cli\u003eHeavy hex profile: 3\/8 inches height, 1\/2 inches width across flats\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish — no additional surface treatment to degrade or peel\u003c\/li\u003e\n  \u003cli\u003eWidth across points of 0.556 inches for precise socket or wrench fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard UNC replacement or service fastener for any 1\/4-20 threaded application requiring a nylon insert hex lock nut in 18-8 stainless steel.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall using a standard hex wrench or socket sized to 1\/2 inches across flats. Power down or de-energize any associated equipment before accessing fastener assemblies in electrical or mechanical enclosures. Nylon insert lock nuts are single-use by design — the nylon deforms on first installation and may not retain full locking force if removed and reused. Follow applicable mechanical and structural codes for the specific trade application.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNut Type\u003c\/strong\u003e: Heavy Hex Lock Nut\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLocking Style\u003c\/strong\u003e: Nylon Insert\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: 18-8 Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Bright \/ Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsert Material\u003c\/strong\u003e: Nylon\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth Across Flats\u003c\/strong\u003e: 0.489 to 0.503 inches (nominal 1\/2 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth Across Points\u003c\/strong\u003e: 0.556 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.015 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 31-NU-25C\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51691805114674,"sku":"31-NU-25C","price":995.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/400a4e0254e5faae61c5aedb699aee59.jpg?v=1788289956","url":"https:\/\/voomisupply.com\/products\/value-collection-31-nu-25c-hex-lock-nut-1-4-20-18-8-ss","provider":"Voomi Supply","version":"1.0","type":"link"}