WASHER - 5/16 PLAIN ZINC (Toyota TY1101602)

A worn washer can allow fastener loosening under vibration, leading to component misalignment or detachment. This aftermarket replacement part references Toyota catalog number TY1101602. It is a plain washer with a 5/16-inch inner diameter, made from zinc-plated steel for corrosion resistance. The washer distributes load evenly under a bolt head or nut to prevent surface damage. In a typical application, a missing or crushed washer may cause a fastener to embed into softer material, reducing clamp force. Verify the serial number or application, then call (562) 693-7748. The part is a hardware washer, a simple but essential component for maintaining joint integrity.

Part number variants: TY1101602, ty1101602