Hobson UNF Hex Nut, Grade 8, Plain, 1"-14, Box of 50

This Hobson UNF hex nut is 1"-14 (UNF thread, Grade 8, plain finish). 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.

Gr means the imperial grade-strength level of a screw or nut, for example Grade 2, Grade 5 or Grade 8. UNF means Unified National Fine Thread and TPI means threads per inch.

Where this product is used

• Fitting to bolts and studs, and to threaded rod cut to length
• Locking up bolted flanges and brackets, with a washer under the nut
• Use in pairs on threaded rod or studs, tightened against each other, to help resist loosening
• Workshop jobs where the part is protected by its surroundings
• Heavy-duty assemblies and machine building where a high-strength fastener is wanted

Features

• Size 1"-14
• UNF thread, hex nut
• Grade 8, plain finish
• Supplied as a box of 50
• Spanner size (A/F)
• Plain (uncoated) steel for dry indoor and machinery use
• Grade 8 alloy steel for heavy-duty work

Key specifications

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. Choose the class or grade to suit the bolt you are fastening, and confirm the pairing with your specification if the joint is load-critical.

A plain finish means bare steel with only a light oil film on it. It will rust quickly in damp conditions. Keep plain parts for dry indoor use, machinery and assemblies that get painted, oiled or enclosed. Outdoors or in damp areas, a hot dip galvanised or 316 stainless alternative is the better choice.

Grade 8 is alloy steel for heavy-duty use (SAE convention). UNF is the fine inch thread: the finer pitch gives more threads per inch and a finer adjustment. It only mates with UNF nuts and tapped holes of the same diameter. For load-critical, structural or lifting joints, confirm the fastener against the engineer's specification. Fasteners are not lifting rated unless marked.

Related nuts: Hobson UNF Hex Nut, Grade 8, Plain, 1/4" to 2", Hobson UNF Hex Nut, Grade 8, Zinc Plated, 1/4" to 2" and Hobson UNF Hex Nut, Grade 8, High Tensile Steel, Zinc, 1/2" and 5/8".