Value Collection 330490BR Jam Nut 3/4-16 Unf Grade 2 Zinc-plated

Product Description

The VALUE COLLECTION 330490BR is a 3/4-16 UNF jam nut machined from Grade 2 steel with a zinc-plated finish. Jam nuts are thin hex nuts used to lock a standard nut in place or secure a threaded fastener where minimal vertical clearance is available. This nut measures 1-1/8 inches across the flats and 0.4219 inches in height, with a right-hand thread direction conforming to Unified National Fine (UNF) standards. At 0.03 pounds, it is well suited for general mechanical and structural fastening applications where a Grade 2 steel fastener meets the load requirements.

This jam nut is used across a broad range of mechanical assembly, maintenance, and fabrication tasks in industrial, commercial, and trade settings. Common applications include HVAC equipment assembly, plumbing and piping support structures, electrical enclosure mounting, and general sheet metal or structural work. The fine 3/4-16 thread pitch provides precise adjustment and strong locking capability, making it a practical choice for lock-nut installations on threaded rod, bolts, and adjustment mechanisms where vibration resistance is needed.

Key Features

• 3/4-16 UNF right-hand thread for precise engagement and secure locking
• Grade 2 steel construction provides adequate tensile strength for general-purpose fastening
• Zinc-plated finish offers basic corrosion resistance in dry or mildly humid environments
• Low-profile jam nut geometry at 0.4219 inches height for tight-clearance installations
• 1-1/8 inch width across flats fits standard 1-1/8 inch hex wrenches and sockets

Compatibility

Designed as a general-purpose replacement or stock jam nut for any threaded fastener application requiring a 3/4-16 UNF right-hand thread pattern with a 1-1/8 inch hex profile.

Installation Notes

Install using a 1-1/8 inch open-end wrench, box wrench, or socket. Tighten the jam nut against the primary nut or seating surface while holding the primary fastener stationary to prevent co-rotation. Inspect threads for damage or contamination before installation. Grade 2 steel is not rated for high-temperature or high-stress structural connections governed by ASTM or SAE specifications requiring higher material grades.