Value Collection 330070PS Hex Jam Nut 5/16-18 Unc Grade 2

Product Description

The VALUE COLLECTION 330070PS is a 5/16-18 UNC hex jam nut manufactured from Grade 2 steel with a zinc-plated finish. Jam nuts are thin hex nuts used to lock a standard nut in place or to secure a fitting in applications where a full-height nut is not required. This nut features right-hand threading, measures 1/2 inch across the flats, and stands 3/16 inch tall. The zinc coating provides basic corrosion resistance suitable for general indoor and light outdoor fastening applications. Installation requires only a standard wrench sized to the 1/2-inch flat width.

This jam nut is suited for general mechanical assembly, maintenance, and repair work across plumbing, HVAC, electrical enclosure, and light structural applications. It is commonly used as a locknut on threaded rod, valve stems, and machine components where axial position must be fixed. The 5/16-18 UNC thread is one of the most common inch-series coarse thread sizes encountered in trade and industrial settings, making this nut a standard stocking item for field technicians and shop assembly alike.

Key Features

• 5/16-18 UNC right-hand thread for compatibility with standard inch-series coarse-threaded fasteners
• Grade 2 steel construction for general-purpose mechanical strength
• Zinc-plated finish provides basic corrosion resistance for indoor and light-duty outdoor use
• Jam nut profile at 3/16 inch height allows use as a locknut or in tight axial-clearance applications
• 1/2 inch across flats fits standard open-end and box wrenches

Compatibility

Designed as a general-purpose replacement or stocking jam nut for any application using 5/16-18 UNC right-hand threaded fasteners.

Installation Notes

Install with a standard wrench sized to the 1/2-inch flat width. When used as a locknut, thread the jam nut against a primary nut and tighten the two nuts against each other to prevent loosening under vibration. Do not use impact tools on jam nuts, as the reduced height makes them prone to rounding or cracking under high-impact torque. Verify thread engagement and seating before applying load.