1" UNC Hex Lock Nut, 304 Stainless Steel - XLNA21UNC

Made in 304 (A2) stainless steel, the UNC Hex Lock Nut is a hex lock nut. A lock nut is designed to resist loosening under vibration better than a plain hex nut.

The range runs to 9 variants, covering sizes 1/4" to 1". Variants are supplied in packs of 25 to 100, depending on size.

Made from 304 (A2) stainless steel, a standard austenitic grade with good everyday corrosion resistance. It is a sound choice away from the coast; in chloride-exposed settings, step up to 316 (A4). UNC (Unified National Coarse) is the coarse inch-based thread. Small sizes are given as a number and threads per inch, such as 8-32 or 10-24, and larger sizes as fractions of an inch.

Austenitic stainless steel is generally non-magnetic, although cold-worked parts can show weak magnetism. Use stainless washers and nuts with stainless fasteners, so the whole joint is made of the same material.

Where this product is used

• Vibrating machinery, frames and guards
• Kitchen, bathroom and laundry fixtures
• Larger sizes for frames, plant and structural fixings
• Food and beverage equipment
• Indoor architectural and joinery work
• General workshop and maintenance use

Features

• Range covers 1/4" to 1" in 9 variants
• Pack quantities to suit trade and bulk buying: packs of 25 to 100
• Designed to resist loosening under vibration
• Hex form for spanner or socket tightening
• A2 (304) stainless steel for indoor, fresh water and general outdoor use
• Inch sizing matches imported UNC equipment

Key specifications

Selecting the right option

The supplier does not state the locking method (for example nylon insert or all-metal) for this listing, so check a sample if the locking method matters for your use. Match the thread system, diameter and pitch to the bolt. Use anti-seize on the thread. For coastal or chloride-exposed use, choose the A4 (316) version: UNC Hex Lock Nut - 316 Stainless Steel.

Related products

Other versions in this range: Hex Inox Lock Nut A4 (316) and Metric Hex Lock Nut - 316 Stainless Steel. Often used with: UNC Hex Bolt - 304 Stainless Steel and UNC Hex Set Bolt (Full Thread) - 304 Stainless Steel.