QA1 Jam Nut - 5/8-18 Left Hand - 15/16 Hex 3/8in Wide - Steel - 5 Pack

With a 15/16 hex size and a 3/8 inch width, these steel jam nuts from QA1 are built for a secure hold. They feature a 5/8-18 left-hand thread, making them a specific choice for certain applications where a reverse thread is needed to lock down components. This pack comes with five individual nuts, offering a practical solution for projects requiring multiple fasteners of this type.

Crafted from steel, these jam nuts are well-built to withstand the forces they'll encounter in engine component applications. The left-hand thread is a notable design choice, often used in situations where a standard right-hand thread might loosen under vibration or rotational forces. Having a dedicated jam nut ensures that your primary fastener stays in place, maintaining critical adjustments.