1/8in Thick Jam Nut

The PRO SHOCK 1/8in thick jam nut (model B201) is a precision-engineered fastener designed for securing shock absorber components and suspension hardware on performance vehicles and custom builds. Jam nuts are essential in automotive assembly work, particularly when you need to lock primary fasteners in place without relying on threadlocker compounds or additional hardware. Whether you're rebuilding a full suspension system, installing coilovers, or fine-tuning damper preload settings, this compact fastener prevents vibration-induced loosening under dynamic load conditions.

The 1/8 inch thickness is engineered to provide optimal bearing surface contact while remaining thin enough to stack efficiently against primary nuts without adding excessive bulk to your suspension assembly. PRO SHOCK's manufacturing tolerances ensure consistent thread engagement and clamping force, critical when dealing with suspension geometry adjustments where even slight fastener movement can alter ride height, camber, or damping characteristics. The compact 1.3 x 0.65 inch profile allows installation in tight suspension spaces where full-sized fasteners create packaging conflicts, making it ideal for coilover perches, lower control arm mounts, and shock tower applications where space is at a premium.

Mechanics and suspension builders working on street, track, or drift platforms benefit from the reliability of this jam nut when assembling adjustable damper systems where repeatability and lock-down security are non-negotiable. This fastener pairs seamlessly with PRO SHOCK suspension components and aftermarket dampers that require secondary locking on adjustable bases or preload rings. Lightweight at 0.03 lbs, the B201 jam nut contributes negligibly to unsprung mass while delivering the mechanical security needed to maintain your suspension tuning between events or service intervals.