Material: galvanized-steel and plasticBolt Height: 2.75 (70mm)Thread diameter: 0.3" (7.8mm)Package Included :2Pcs x Toilet Seat Bolt2Pcs x Washers2Pcs x Plastic nuts[DURABLE CONSTRUCTION] - The Toilet Seat Screws are made with steel and premium plastic material for long time usage, no slippage, no rusting, and excellent tightly fit. Toilet seat hinge bolts and nuts kit also includes metal washers and plastic down lock nuts for perfect fastening.[USEFUL TOILET HARDWARE] - The galvanized-steel Toilet Seat Hinge Bolts and Screw are much better than the plastic ones. Update your loosing with bolt with the steel toilet seat hinge bolts, there will be no more wobbly toilet seats, and the toilet seat's nut/bolt was never getting lose any more.[WIDE COMPATIBILITY] The toilet seat fastener replacement hinge bolts universally fit for most toilet seat. r, American Standard Toilets and Others.[EASY TO INSTALL] - The Toilet Seat Screws Kit includes all installation parts: galvanized-steel bolts, plastic nuts and metal washers. The universal toilet seat hinge bolts and screws can be installed with a household tools and takes only a few minutes. It's an efficient solution to fix the problem that toilet seat's nut/bolt was getting lose and not fitting tight enough.[SIZE] - The heavy-duty steel toilet bolt screws are about 2.75 inches in length and the thread diameter is approx. 0.3 inches. The toilet seat fixing screws are more stable than normal screws, preventing the toilet lid from sliding, allowing you to sit comfortably on a stable toilet seat.