SKU: ALL18259-50
UPC: 848238078213
MPN: ALL18259-50
The ALLSTAR PERFORMANCE 1/2-20 LH Steel Jam Nuts 50-pack is an essential fastening component for engine builders, fabricators, and mechanics working on high-performance applications. Left-hand threaded jam nuts are critical for secure, vibration-resistant fastening on rotating shafts and custom-built assemblies where standard right-hand threads won't suffice. This 50-piece bulk pack ensures you'll have enough for multiple projects without frequent reordering.
Manufactured from hardened steel, these 1/2-20 LH jam nuts deliver reliable clamping force and thread engagement in demanding automotive environments. The left-hand configuration (LH) means the threads turn counter-clockwise for tightening, preventing unintended loosening on counter-rotating components like alternators and water pumps. Steel construction provides superior durability compared to nylon-insert alternatives, making these nuts ideal for engine compartment heat and fuel system applications.
Professionals and enthusiasts undertaking engine modifications or custom fuel system installations benefit most from maintaining a stocked supply of these jam nuts. They work best paired with matching 1/2-20 LH bolts and studs for a secure assembly. Ensure compatibility with your specific applications, especially in vintage builds where thread specifications may vary.
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