{"product_id":"value-collection-239090ps-external-tooth-lock-washer","title":"Value Collection 239090PS External Tooth Lock Washer","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION 239090PS is a zinc-plated, steel external tooth lock washer designed for use with 3\/8 inch screws. The external tooth configuration bites into both the fastener bearing surface and the mating material to resist loosening caused by vibration and torque. Manufactured from Grade 2 steel with a zinc-plated finish for basic corrosion resistance, this washer measures 0.398 inches inside diameter, 0.694 inches outside diameter, and 0.04 inches thick. It is a standard hardware component installed by electricians, HVAC technicians, plumbers, and general mechanical trades wherever a reliable anti-loosening solution is required at a 3\/8 inch fastener location.\u003c\/p\u003e\u003cp\u003eExternal tooth lock washers in this size range are commonly used in panel assemblies, equipment mounting applications, junction boxes, and mechanical enclosures. They are suited for residential and light commercial installations where vibration or thermal cycling could otherwise cause fastener backout. This washer is appropriate for use on steel and other hard mating surfaces that allow the serrated teeth to seat properly and maintain clamping load over time.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eExternal tooth design resists loosening under vibration and dynamic loading\u003c\/li\u003e\n\u003cli\u003eGrade 2 steel construction provides solid mechanical performance for standard fastening applications\u003c\/li\u003e\n\u003cli\u003eZinc-plated finish offers basic corrosion resistance for indoor and protected environments\u003c\/li\u003e\n\u003cli\u003e0.398 inches inside diameter fits standard 3\/8 inch fasteners\u003c\/li\u003e\n\u003cli\u003e0.04 inches thickness suits typical fastener stack-up tolerances\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard external tooth lock washer for use with 3\/8 inch screws and bolts in general mechanical, electrical, and HVAC fastening applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall this washer between the fastener head or nut and the mating surface, with the teeth facing the fastener bearing surface to allow proper bite. Ensure the mating surface is hard enough for the teeth to engage — avoid use on soft materials such as aluminum or plastics where tooth penetration may be inconsistent. Tighten fasteners to the torque specification required by the assembly, not the washer. Follow applicable codes such as NEC for electrical panel work or relevant mechanical codes for equipment mounting.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 0.398 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 0.694 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.04 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTooth Type\u003c\/strong\u003e: External Tooth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Grade 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc-Plated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: 239090PS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51699106873650,"sku":"239090PS","price":8526.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/714996568e8e09591e64fc97eeef0106.jpg?v=1788372332","url":"https:\/\/voomisupply.com\/products\/value-collection-239090ps-external-tooth-lock-washer","provider":"Voomi Supply","version":"1.0","type":"link"}