DIMENSIONAL SPECIFICATIONS: Thread Size: 5/16"-18 (Coarse Thread); Head Dia: 0.65"; Screw Length: 1 inch (measured from the flat top of the head to the tip of the threads). Please verify your required length using this method before ordering to ensure a perfectly flush fit PREMIUM 304 STAINLESS STEEL (ASME COMPLIANT): Manufactured to strict ASME B18.6.3 standard specifications for machine screws. Forged entirely from 100% solid 304 (18-8) stainless steel, offering superior tensile strength and lifetime resistance against oxidation, rust, and chemical corrosion in damp environments UNIVERSAL 5/16"-18 HEAVY-DUTY FIT (ALL SCENARIOS): The massive 5/16"-18 thread provides exceptional shear strength for heavy mechanical and structural hardware. Choose short lengths for thick metal fabrication, truck bed rails, and heavy router table plates; standard lengths for custom automotive bumpers, agricultural equipment, and large woodworking vises; or extended lengths for bolting heavy industrial machinery frames, structural brackets, and thick lumber. TRUE FLUSH MOUNT & HIGH TORQUE DRIVE: Engineered with a standard 82-degree countersunk Flat Head that sits perfectly flush with the mounting surface, eliminating snag hazards and providing a sleek, aerodynamic profile. The deep Hex Socket (Allen) drive handles significantly higher torque than Phillips screws, completely eliminating cam-out and stripped heads during assembly INSTALLATION & ATTENTION TIPS: A large 3/16" Hex Key (Allen Wrench) is highly recommended for all 5/16"-18 lengths. Warning: Because the 5/16" head is exceptionally wide, ensure your pre-drilled holes are deeply and precisely countersunk at an 82-degree angle to achieve a flawless flush finish. When threading into other stainless steel nuts, using an anti-seize lubricant is mandatory to prevent thread galling (cold welding) under extreme tension PREMIUM FLAT HEAD SOCKET CAP SCREWS
Engineered for precision and high torque, these ASME B18.3 compliant fasteners feature a standard 82-degree countersink for a perfectly flush mount. The deep hex (Allen) drive handles extreme tension and prevents stripping.

100% Solid 304 Stainless Steel (18-8)
Delivers lifetime rust and corrosion resistance. Ideal for robotics, woodworking jigs, PC builds, and heavy machinery.

⚠️ CRITICAL MEASUREMENT NOTE:
Industry standards dictate that the specified length INCLUDES the head. Measure from the flat top surface down to the tip of the threads to ensure an exact fit for your project.