{"product_id":"holo-krome-76542-hex-socket-cap-screw-m20-x-2-50-alloy-steel","title":"Holo-krome 76542 Hex Socket Cap Screw M20 X 2.50 Alloy Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HOLO-KROME 76542 is a metric hex socket cap screw used in mechanical assemblies, structural joints, and equipment maintenance applications requiring a high-strength fastener. It features an M20 x 2.50 thread size with a 180 mm length under the head and is partially threaded, making it well-suited for clamped-joint applications where thread engagement is intentionally limited. The screw is manufactured from alloy steel to a Grade 12.9 material specification and finished with a black oxide coating that provides mild corrosion resistance and a low-reflectance surface. Licensed HVAC, plumbing, electrical, and mechanical technicians regularly use this fastener when servicing or assembling industrial equipment frames, equipment mounts, and enclosures.\u003c\/p\u003e\n\u003cp\u003eThis fastener is designed for use in metric-dimensioned equipment and machinery. The M20 thread size and 180 mm body length suit it to medium-to-heavy structural connections found in commercial HVAC unit frames, pump housings, electrical enclosure mounting, and general industrial assembly. A hex socket drive requires a standard hex key or Allen-style driver, allowing installation in confined clearances where a wrench cannot be used. The partial threading is particularly useful in applications requiring a shoulder or grip-length fit between mating components.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM20 x 2.50 metric thread with 180 mm length under head\u003c\/li\u003e\n  \u003cli\u003eGrade 12.9 alloy steel construction for high tensile and proof load strength\u003c\/li\u003e\n  \u003cli\u003eBlack oxide finish for mild corrosion resistance and reduced surface reflectance\u003c\/li\u003e\n  \u003cli\u003ePartially threaded body suited to clamped-joint and grip-length applications\u003c\/li\u003e\n  \u003cli\u003eHex socket drive allows installation in restricted-access locations\u003c\/li\u003e\n  \u003cli\u003eMeets ANSI B1.13M, DIN 912, ISO 4762, and ISO 898-1 fastener standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style and general-service replacement hex socket cap screw for metric-threaded applications requiring an M20 x 2.50 Grade 12.9 fastener conforming to DIN 912 or ISO 4762 dimensional standards.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified mechanic or tradesperson familiar with metric fastener torque requirements for Grade 12.9 alloy steel hardware. Always verify thread engagement depth and confirm mating threads are clean and free of debris before driving the screw. Use a properly sized hex key or socket driver rated for the drive size to avoid rounding the socket recess. Follow applicable equipment manufacturer specifications and relevant codes for fastener torque and joint preload.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: M20 x 2.50\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 180 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThreading\u003c\/strong\u003e: Partially Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Hex Socket\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: 12.9\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black Oxide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFastener Standards\u003c\/strong\u003e: ANSI B1.13M, DIN 912, ISO 4762, ISO 898-1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161501\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: HOLO-KROME\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 76542\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HOLO-KROME","offers":[{"title":"Default Title","offer_id":51742875844914,"sku":"76542","price":59.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e2816fc3ea1a0de3ebbded6c00312548_4b2a5f72-1416-4947-ae41-5c31c24e62a3.jpg?v=1788840120","url":"https:\/\/voomisupply.com\/products\/holo-krome-76542-hex-socket-cap-screw-m20-x-2-50-alloy-steel","provider":"Voomi Supply","version":"1.0","type":"link"}