Midwest Fasteners Fine Thread Zinc Plated Steel Hex Jam Nut

Midwest Fasteners Fine Thread Zinc Plated Steel Hex Jam Nut

The Midwest Fasteners Fine Thread Zinc Plated Steel Hex Jam Nut is a low-profile, fine-thread hex nut built from steel and finished with a zinc plating for corrosion resistance. This family is available in 8 fine-thread sizes, ranging from 1/4"-28 x 1/2" up through 3/4"-16 x 1-1/4", so you can match the exact bolt or stud diameter on the job. Jam nuts are thinner than a standard hex nut, making them ideal for locking against a primary nut or fitting to resist loosening under vibration, or for applications where a slim-profile fastener is required.

Key Features

• Size Range: Offered in 8 fine-thread sizes from 1/4"-28 x 1/2" to 3/4"-16 x 1-1/4", covering the most common fastener diameters used in assembly and repair work.
• Type: Hex Jam Nut, a thin-profile hex nut used as a locking nut against a primary nut or fitting.
• Material & Finish: Steel construction with a zinc plated finish for corrosion resistance and a clean silver appearance.
• Thread: Fine thread pitch across every size in the family, for finer adjustment and increased resistance to loosening under vibration versus coarse thread.
• Color: Silver zinc finish for a consistent, corrosion-resistant appearance across fastener assemblies, regardless of size selected.
• Country of Origin: Manufactured in China to Midwest Fasteners' specifications.

Technical Specifications

• Product Size: 1/4" - 3/4"
• Product Type: Jam Nut
• Product Material: Steel
• Finish: Zinc Plated
• Product Color: Silver
• Thread Type: Fine
• Country of Origin: China
• Available Sizes: 1/4"-28 x 1/2", 5/16"-24 x 9/16", 3/8"-24 x 5/8", 7/16"-20 x 25/32", 1/2"-20 x 27/32", 9/16"-18 x 1, 5/8"-18 x 1-1/16", 3/4"-16 x 1-1/4"

Typical Applications

• Locking a primary hex nut in place to prevent loosening from vibration in machinery or equipment assemblies.
• Fine-thread fastening applications in automotive, equipment, and maintenance repair work.
• Low-profile nut applications where a standard hex nut height is too tall for the assembly.
• General fabrication and maintenance tasks requiring a zinc plated steel fine-thread nut.
• Matching a specific stud or bolt diameter from the available fine-thread size range for a precise locking fit.

Why Midwest Fasteners?

Midwest Fasteners builds its hex jam nuts from steel with a consistent zinc plated finish across the entire fine-thread size range, giving maintenance techs and fabricators a dependable locking nut for professional and DIY projects alike. The fine thread pitch and low-profile hex design make this jam nut family a practical choice wherever a standard nut height won't fit or where an extra locking element is needed against vibration, no matter which of the 8 available sizes your assembly calls for.