Bremick UNC Hex Nut, Grade 5, Plain, 3/8", Box of 50

A hex nut is the standard six-sided nut. It is turned with a spanner or socket onto a bolt, stud or threaded rod of the same thread form, diameter and pitch. This is one Bremick UNC hex nut (UNC thread, Grade 5, plain finish), size 3/8", supplied as a box of 50.

UNC is Unified National Coarse Thread, and TPI is threads per inch. Threads per inch are shown for each size. Grade is the imperial strength level of a screw or nut, for example Grade 2, Grade 5 or Grade 8. On the Bremick class vs grade chart, Grade 5 is high tensile, alongside metric Class 8.8.

Where this product is used

• Fitting to bolts and studs, and to threaded rod cut to length
• Securing bolted joints in fabrication, maintenance and repair
• Use in pairs on threaded rod or studs, tightened against each other, to help resist loosening
• Dry indoor machinery, tooling and equipment
• Medium-strength machinery and equipment work that needs more than Grade 2
• There is one item, 3/8", so the table and the part number are the only choices to check

Features

• Size 3/8"
• UNC thread, hex nut
• Grade 5, plain finish
• Supplied as a box of 50
• Uncoated plain steel: paint, oil or enclose it for protection
• Grade 5 medium-carbon steel, quenched and tempered

Key specifications

Choosing the finish

Plain (uncoated) steel has no corrosion protection beyond a light oil film, and it rusts quickly once moisture reaches it.

It suits dry indoor jobs, machinery, and assemblies that will be painted, oiled or enclosed. Where the job is outside or damp, move to hot dip galvanised or 316 stainless.

What the grade means

Grade 5 is the medium-carbon, quenched and tempered imperial grade (SAE convention).

UNC is the coarse inch thread, the general-purpose choice; it only mates with UNC nuts and tapped holes of the same diameter.

Fasteners are not lifting rated unless marked.

Choosing the right option

Match the nut to the bolt, stud or rod: thread form, diameter and pitch must all agree. Sizes are nominal thread diameters in inches. Compare the threads per inch with your bolt.

See also: Bremick UNC Hex Nut, Grade 5, High Tensile Steel, Zinc, 1/4" to 3/8", Bremick UNC Hex Nut, Grade 8, High Tensile Steel, Plain, 7/16" to 1-1/2", Bremick UNC Hex Nut, Grade 8, High Tensile Steel, Zinc, 1/2" to 3/4".