Hotdipped galvanized steel 5/16 in USS flat washers, 100 pieces per pack, Pack of 3 (300 total). Compatible with Hillman 5/16 in USS flat washer specifications. Why choose these washers Durable corrosion resistance: Hotdipped galvanizing provides a protective zinc coating that helps resist rust and extends service life in outdoor and damp environments. Correct fit for 5/16 in fasteners: USS (United States Standard) diameter and thickness ensure proper seating on 5/16 in bolts and screws for consistent load distribution. Bulk quantity for projects: Three packs of 100 washers each provide 300 washers, reducing the need for frequent reordering and making them convenient for large jobs and maintenance supplies. Protects surfaces and connections: Flat washers prevent damage to work surfaces, reduce pullthrough, and help maintain proper clamping pressure. Key attributes Function: Flat washer for load distribution, surface protection, and spacer applications. Compatibility: Sized for 5/16 in USS bolts and screws; compatible with Hillman 5/16 in USS flat washer specifications. Size: 5/16 in inner diameter per USS standard. Material and finish: Hotdipped galvanized steel for added durability and corrosion resistance. Performance: Reliable support for mechanical connections in construction, , and assembly tasks. Practical applications Deck and fence assembly: Use with 5/16 in bolts to secure posts, rails, and hardware while protecting wood and metal surfaces from damage. Equipment and machinery maintenance: lost or worn washers on motors, brackets, and frames to restore even clamping pressure and reduce vibrationrelated loosening. Outdoor hardware and general construction: Ideal for gates, hinges, structural connections, and other outdoor fastenings where a corrosionresistant washer is preferred. What you get Three sealed packs, each containing 100 hotdipped galvanized 5/16 in USS flat washers, for a total of 300 washers ready for professional or DIY projects. Notes Intended for use with 5/16 in USS bolts and screws. Verify bolt diameter and washer inner diameter match for correct fit.