Socket Low Head Cap Screw, 1/4-20 x 5/8", Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse Thread, 1/4 inch Hexagonal Allen Bolt, Length: 5/8 inch

Premium Grade 8 alloy steel socket head cap screws engineered for professionals who demand maximum strength and reliability. These 1/4-20 x 5/8 inch allen bolts deliver 150,000 PSI tensile strength, far exceeding Grade 5 and Grade 2 fasteners for critical mechanical assemblies, automotive applications, and precision equipment. Superior Grade 8 Construction Manufactured from heat-treated alloy steel to SAE J429 Grade 8 specifications, these hex socket cap screws provide exceptional holding power and resistance to stripping under high torque loads. The fully threaded 5/8" length ensures maximum engagement in tapped holes and compatibility with standard hex nuts across countless machinery, robotics, CNC equipment, and industrial applications. Low Profile Design for Tight Spaces The compact socket head design features a recessed hexagonal drive that sits lower than traditional hex bolts, making these low head cap screws ideal for confined spaces, recessed mounting, and applications where clearance is limited. Install easily with a standard 3/16" Allen key or hex driver, eliminating the need for external wrenches and allowing access in tight quarters impossible for conventional fasteners. Professional Black Oxide Finish Industrial-grade black oxide coating provides corrosion resistance for indoor and workshop environments while maintaining precise dimensional tolerances. The uniform matte black finish reduces glare, enhances appearance on visible installations, and adds lubricity for smoother threading during installation of these precision fasteners. Versatile Applications Perfect for machine building, automotive modifications, 3D printers, electronics enclosures, bicycle assembly, tooling fixtures, jigs, clamps, and equipment repair. The 1/4-20 coarse thread (UNC) is North America's most common 1/4" thread specification, ensuring broad compatibility with existing tapped holes, threaded inserts, and standard hardware. Bulk 100-Piece Value Pack Professional quantity socket cap bolt package eliminates frequent reordering for machinists, mechanics, fabricators, maintenance departments, and serious DIYers. Cost-effective bulk pricing delivers premium Grade 8 strength at exceptional value for production runs, repair shops, and projects requiring multiple matching high-strength fasteners. Specifications: 1/4" diameter, 20 threads per inch, 5/8" fully threaded length, 3/16" hex socket, Grade 8 alloy steel, black oxide finish, ASME B18.3 compliant.

• LOW PROFILE HEX SOCKET DESIGN - Compact socket head cap screw with recessed hexagonal drive allows for installation in confined spaces and applications with limited clearance, providing secure fastening where standard hex head bolts cannot fit
• PRECISION MACHINED GRADE 8 SOCKET CAP SCREWS - CNC-manufactured from premium Grade 8 alloy steel bar stock with strict quality control, these 1/4-20 allen bolts feature accurate head dimensions, concentric socket alignment, and uniform thread pitch for reliable 150,000 PSI performance
• LOW CLEARANCE INSTALLATION CAPABILITY - Socket head cap design requires minimal overhead clearance for hex key access, ideal for installing Grade 8 strength fasteners in enclosed spaces, under panels, between components, and other tight-access applications impossible with wrench-driven fasteners
• PRECISION 1/4-20 COARSE THREADING - Standard UNC (Unified National Coarse) 5/8 inch fully threaded length ensures compatibility with tapped holes and hex nuts, providing reliable engagement and easy installation with 3/16" Allen key or hex key driver
• LONG-LASTING BLACK OXIDE PROTECTION - Chemical conversion coating on Grade 8 alloy steel provides superior adhesion compared to plating, won't chip or flake during installation, offers moderate corrosion resistance for non-extreme environments, and enhances oil retention for improved lubrication. Black Oxide is not a protective finish and will rust if exposed to moisture. Stainless Steel material is recommended for environments with moisture