7/16-20 x .875 12pt Bolt w/LH Threads

The 7/16-20 x .875 12pt Bolt w/LH Threads from JESEL is a precision fastener engineered for high-performance engine builds, particularly in racing and military small-arms platforms where left-hand thread orientation prevents unintended loosening under vibration. This specialized bolt serves applications demanding consistent clamping force and reliability in extreme conditions—from competition engines to tactical weapon systems where standard right-hand fasteners would fail due to rotational stress or assembly requirements.

Constructed with a 12-point head design, this bolt distributes load across a wider contact surface than conventional hex fasteners, reducing stress concentration and improving grip security in tight engine compartments or confined firearm assemblies. The 7/16-inch diameter with 20 threads-per-inch pitch and .875-inch length provides the fine thread engagement necessary for precision alignment and vibration resistance, while the left-hand thread orientation ensures compatibility with components specifically designed for counter-clockwise assembly—a critical detail in piston rod bolts, compensators, and specialized weapon components.

Operators, gunsmiths, and engine builders working with JESEL or similar precision systems must verify thread direction before installation to prevent damage and ensure safety. This fastener is ideal for those rebuilding or maintaining competition engines, AR-platform uppers with specialized components, or precision bolt assemblies where stock fasteners are insufficient. Always reference your platform's technical manual to confirm left-hand thread compatibility before ordering.