{"product_id":"midland-industries-28321j-jam-nut-7-8-20-unef-brass","title":"Midland Industries 28321J Jam Nut 7\/8-20 Unef Brass","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MIDLAND INDUSTRIES 28321J is a brass jam nut designed for bulkhead fitting applications requiring a 7\/8-20 UNEF threaded connection. Jam nuts serve as locking fasteners, threading against a primary nut or fitting to prevent loosening under vibration or pressure. This part is machined from brass, offering corrosion resistance and reliable performance in fluid and gas handling systems. At 0.04 pounds, it is a compact component measuring approximately 0.25 inches in height and 1.05 inches in length. Plumbers, pipefitters, and HVAC technicians install jam nuts as part of bulkhead assemblies in panel installations, tank fittings, and instrumentation connections.\u003c\/p\u003e\n\u003cp\u003eThe 28321J is suited for bulkhead section installations where a secondary locking nut is required to secure a fitting through a panel or wall. The 7\/8-20 UNEF thread designation indicates a fine-pitch unified extra-fine thread, commonly found in instrumentation, hydraulic, and specialty plumbing fittings. This part fits residential and light commercial applications wherever a brass bulkhead jam nut of this thread size is specified. It is sold individually with a minimum order quantity of one.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e7\/8-20 UNEF fine-pitch thread for precise, secure engagement\u003c\/li\u003e\n  \u003cli\u003eBrass construction provides corrosion resistance in fluid and gas service\u003c\/li\u003e\n  \u003cli\u003eCompact profile at 0.25 inches height for tight panel clearances\u003c\/li\u003e\n  \u003cli\u003eDesigned for bulkhead section applications requiring a secondary locking nut\u003c\/li\u003e\n  \u003cli\u003eLightweight at 0.04 pounds for easy handling and installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or service component for bulkhead fitting assemblies requiring a 7\/8-20 UNEF threaded brass jam nut.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by a licensed plumber, pipefitter, or qualified HVAC technician. Before servicing any bulkhead fitting, shut off fluid or gas supply and depressurize the line. Thread the jam nut onto the fitting by hand before tightening with an appropriate open-end or box wrench to avoid cross-threading. Do not overtighten brass fittings, as brass can deform under excessive torque.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 7\/8-20 UNEF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: UNEF Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Brass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 1.05 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 1.15 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.04 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCategory\u003c\/strong\u003e: Brass Fittings - Bulkhead Jam Nuts and Lock Washers\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: MIDLAND INDUSTRIES\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 28321J\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MIDLAND INDUSTRIES","offers":[{"title":"Default Title","offer_id":67949335937330,"sku":"28321J","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/59ed7312d35e8aa23ed5728d5406e5fc.jpg?v=1791689249","url":"https:\/\/voomisupply.com\/products\/midland-industries-28321j-jam-nut-7-8-20-unef-brass","provider":"Voomi Supply","version":"1.0","type":"link"}