Grade 5 Hex Nuts - (USS) Coarse Thread

Grade 5 Hex Nuts - (USS) Coarse Thread

Grade 5 hex nuts in USS coarse thread are heat-treated medium carbon steel nuts. They are the matching nut for Grade 5 hex cap screws and standard coarse threaded rod in medium-to-heavy duty work. Coarse thread is the most common choice: it starts quickly, tolerates a little dirt or thread damage, and is less likely to cross-thread. Every size is zinc plated for corrosion resistance.

Specifications

• Strength: SAE Grade 5, heat treated, 120,000 psi proof load
• Thread: USS coarse (UNC)
• Sizes: 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12, 5/8"-11, 3/4"-10, 7/8"-9, 1"-8
• Finish: zinc plated

Common Uses

• Grade 5 coarse thread bolts and cap screws
• Equipment, machinery and structural brackets
• General industrial maintenance

FAQ

How do I know if my bolt is coarse (USS) thread?
Check threads per inch. For example, a 1/2" coarse bolt has 13 threads per inch (1/2"-13), while a 1/2" fine bolt has 20. A thread gauge makes this quick.

Is a Grade 5 nut strong enough for a Grade 5 bolt?
Yes. Grade 5 nuts are designed to match Grade 5 bolts so the bolt, not the nut threads, carries the full clamp load.

Related: Fine thread version | All Grade 5 Hex Nuts | Grade 8 Hex Nuts, Coarse

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