{"product_id":"value-collection-581759br-hex-socket-cap-screw-7-8-9-unc","title":"Value Collection 581759BR Hex Socket Cap Screw 7\/8-9 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe Value Collection 581759BR is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Manufactured from alloy steel with a black oxide finish, this screw delivers corrosion resistance and a clean matte appearance suited for close-tolerance work. The 7\/8-9 UNC thread profile and 1-3\/4 inch length under head make it appropriate for medium-to-heavy clamping loads. Drive engagement is achieved through a 3\/4-inch internal hex socket, requiring a matching hex key or Allen-type driver. This fastener is partially threaded, providing a stronger grip in the shank area and precise alignment in clearance holes. Machinists, millwrights, and mechanical contractors are the typical installers.\u003c\/p\u003e\n\u003cp\u003eThis cap screw is suited for use in general industrial machinery, heavy equipment, tooling fixtures, and structural mechanical assemblies where a recessed-drive, high-strength fastener is required. The 7\/8-9 UNC coarse thread is widely used in ferrous and alloy steel applications where quick assembly and strong thread engagement are priorities. The black oxide coating also reduces light reflection and provides mild corrosion protection in dry or lightly oiled environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e7\/8-9 UNC coarse thread for fast assembly and strong engagement in alloy steel assemblies\u003c\/li\u003e\n  \u003cli\u003e1-3\/4 inch length under head with partial threading for shank strength and alignment\u003c\/li\u003e\n  \u003cli\u003e3\/4-inch hex socket drive for high-torque input using standard hex keys or drivers\u003c\/li\u003e\n  \u003cli\u003eAlloy steel construction for elevated tensile and shear strength\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish provides a matte appearance and mild corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eMeets ASME\/ANSI B18.3 and ASTM A574 standards for dimensional and mechanical compliance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style or replacement hex socket cap screw for industrial machinery, structural fixtures, and mechanical assemblies requiring a 7\/8-9 UNC partially threaded fastener with a 3\/4-inch hex socket drive.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by machinists, millwrights, or mechanical contractors using a calibrated torque wrench and the appropriate 3\/4-inch hex key or bit. De-energize and lock out all equipment before fastener removal or installation per applicable OSHA lockout\/tagout procedures. Do not substitute a smaller drive tool, as rounding the socket will damage the fastener and require extraction. Inspect thread engagement depth before final torque to ensure proper clamping.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 7\/8-9 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 1-3\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Hex Socket\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Size\u003c\/strong\u003e: 3\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Partially Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ASME\/ANSI B18.3; ASTM A574\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: 581759BR\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51695865200946,"sku":"581759BR","price":63.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c1dcabbce0fb39df5082127f011d64df.jpg?v=1788338904","url":"https:\/\/voomisupply.com\/products\/value-collection-581759br-hex-socket-cap-screw-7-8-9-unc","provider":"Voomi Supply","version":"1.0","type":"link"}