{"product_id":"value-collection-zmsch90158-o-ring-4-75-in-id-nbr-dash-158","title":"Value Collection ZMSCH90158 O-ring 4.75 in Id Nbr Dash 158","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VALUE COLLECTION ZMSCH90158 is a Dash 158 O-ring made from Nitrile Butadiene Rubber (Buna-N), one of the most widely used elastomers in sealing applications. It measures 4.75 inches inside diameter, 4.938 inches outside diameter, and 0.094 inches thick with a round cross section. Rated at 90 durometer (extra hard), this O-ring delivers excellent compression set resistance along with strong tear and abrasion resistance. It is sold in a package of 25 units. Plumbers, HVAC technicians, and industrial maintenance professionals install this part wherever a reliable petroleum-compatible seal is required.\u003c\/p\u003e\u003cp\u003eThis O-ring is suited for residential and commercial applications involving petroleum-based fluids and oils. The Buna-N compound performs across a wide temperature range of -40 to 250 degrees F, making it appropriate for hydraulic systems, fuel lines, pneumatic fittings, and general-purpose fluid sealing in mechanical and HVAC equipment. It conforms to SAE and MIL-Spec standards, giving technicians confidence in consistent dimensional and material quality across production lots.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBuna-N (Nitrile Butadiene Rubber) material with excellent resistance to petroleum products\u003c\/li\u003e\n\u003cli\u003e90 durometer extra-hard rating for high-compression sealing applications\u003c\/li\u003e\n\u003cli\u003eOperating temperature range: -40 to 250 degrees F\u003c\/li\u003e\n\u003cli\u003eRound cross section, Dash 158 designation for standard groove compatibility\u003c\/li\u003e\n\u003cli\u003eMeets SAE and MIL-Spec standards\u003c\/li\u003e\n\u003cli\u003eSold in a package of 25 for job-lot efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eCompatible with petroleum products and petroleum-based fluids. Designed as a standard Dash 158 O-ring replacement for any application requiring a 4.75-inch ID Buna-N seal. Note: Buna-N is not compatible with ozone, direct sunlight exposure, or equipment that generates ozone such as motors and certain electrical devices.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eO-ring installation should be performed by a qualified plumber, HVAC technician, or mechanical maintenance professional. Always de-pressurize and lock out the system before removing the existing seal. Lightly lubricate the O-ring with a compatible lubricant prior to seating to prevent nicking or tearing during installation. Do not overstretch or twist the O-ring when placing it into the groove.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 4.75 inches (120.32 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e: 4.938 inches (125.42 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness\u003c\/strong\u003e: 0.094 inches (2.62 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross Section Shape\u003c\/strong\u003e: Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDash Number\u003c\/strong\u003e: 158\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Buna-N (Nitrile Butadiene Rubber)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 90 Durometer (Extra Hard)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Working Temperature\u003c\/strong\u003e: -40 degrees F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Working Temperature\u003c\/strong\u003e: 250 degrees F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Fluid Types\u003c\/strong\u003e: Petroleum Products\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: SAE, MIL-Spec\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFDA Approved\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.39 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: ZMSCH90158\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51696033038642,"sku":"ZMSCH90158","price":17.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e63e5be40384736fb1f090e4d0cdd585_12e2a0fa-2317-4e22-9250-e16c00d307fc.jpg?v=1788339856","url":"https:\/\/voomisupply.com\/products\/value-collection-zmsch90158-o-ring-4-75-in-id-nbr-dash-158","provider":"Voomi Supply","version":"1.0","type":"link"}