Value Collection MPA996269 Left Hand Hex Jam Nut 1/2-20 Unf

Product Description

The VALUE COLLECTION MPA996269 is a left-hand thread hex jam nut designed for applications where standard right-hand fasteners are not appropriate, such as assemblies subject to counter-clockwise rotation or vibration that would loosen a conventional nut. Manufactured from steel with a zinc clear finish for basic corrosion resistance, this nut follows the 1/2-20 UNF thread standard. Measuring 3/4 inches across the flats and 5/16 inches in height, it is a low-profile jam nut intended for use as a locking or positioning fastener in mechanical assemblies. Installation requires a standard open-end or combination wrench sized to 3/4 inches.

This jam nut is suited for mechanical, HVAC, plumbing support, and general industrial assembly work where a left-hand threaded 1/2-20 UNF fastener is specified. It is appropriate for residential and light commercial applications requiring a steel, zinc-finished fastener in a jam nut profile. Sold in packages of 10, it is a practical stocking item for shops and service vehicles that encounter left-hand threaded assemblies regularly.

Key Features

• Left-hand thread direction prevents loosening in counter-clockwise rotation applications
• 1/2-20 UNF thread standard for precise, fine-pitch engagement
• Steel construction with zinc clear finish for basic corrosion resistance
• Low-profile jam nut design at 5/16 inches high
• 3/4 inches across flats for standard wrench fitment
• Packaged in quantities of 10 for bench stock and service inventory

Compatibility

Designed as a replacement or stocking jam nut for any mechanical assembly requiring a 1/2-20 UNF left-hand threaded fastener in a hex jam nut profile.

Installation Notes

Installation is performed by hand and tool by any qualified mechanic or trade professional. Verify thread direction before installation — left-hand nuts tighten counter-clockwise and loosen clockwise, opposite of standard fasteners. Use a 3/4-inch open-end or combination wrench to seat and torque the nut. Ensure mating threaded rod or shaft is also left-hand threaded to avoid cross-threading damage.