Midwest Fasteners Class 8 Zinc Plated Steel Coarse Thread Nylon Insert Lock Nut

Midwest Fasteners Class 8 Zinc Plated Steel Coarse Thread Nylon Insert Lock Nut

The Midwest Fasteners Class 8 nylon insert lock nut is a zinc plated, coarse thread steel lock nut built for applications where vibration or repeated movement can back a standard hex nut off its thread. This family is available across a range of metric nut sizes from 4mm-0.7 up to 14mm-2.0, covering 4mm-0.7, 5mm-0.8, 6mm-1.0, 8mm-1.25, 10mm-1.5, 12mm-1.75, and 14mm-2.0 thread pitches, so the right size is available for a wide range of coarse-thread bolts and screws. Across every size in the range, the nylon collar grips the mating thread to resist loosening, while the zinc finish gives the steel body corrosion resistance for general shop, equipment, and fabrication use. Every size in this line is manufactured in China and finished in a silver zinc coating for a clean, consistent appearance across a production run.

Key Features

• Size Range: Available in 4mm-0.7, 5mm-0.8, 6mm-1.0, 8mm-1.25, 10mm-1.5, 12mm-1.75, and 14mm-2.0 coarse thread sizes to fit common metric bolts and threaded rod.
• Material & Finish: Steel construction with a zinc plated, silver-finish coating for added corrosion resistance over bare steel.
• Thread: Coarse thread pitch for fast engagement and compatibility with standard coarse-thread bolts and screws.
• Type: Nylon insert lock nut design uses an internal nylon collar to create friction against the mating thread, resisting loosening from vibration.
• Grade: Class 8 steel for dependable mechanical performance in general fastening work.
• Color: Silver finish for a clean, uniform look on assembled hardware across every size in the family.

Technical Specifications

• Product Type: Nylon Insert Lock Nut
• Product Finish: Zinc
• Country of Origin: China
• Product Material: Steel
• Product Color: Silver
• Nut Size Range: 4mm-0.7 to 14mm-2.0

Typical Applications

• Securing bolted connections subject to vibration, such as equipment, machinery and vehicle assemblies
• General fabrication and metalworking projects requiring a self-locking nut
• Maintenance and repair work where a standard hex nut has previously backed off
• Shop and jobsite assemblies using coarse-thread bolts or threaded rod across a range of metric sizes

Why Midwest Fasteners?

Midwest Fasteners builds this Class 8 zinc plated nylon insert lock nut family with consistent steel construction and a uniform zinc finish across every metric size, from 4mm-0.7 through 14mm-2.0, so contractors, fabricators and maintenance techs get reliable fit and locking performance every time. The coarse thread pitch and Class 8 rating make it a dependable choice for general fastening work where a standard nut would risk loosening over time.