5/8" x 4" UNC Hex Set Bolt, 316 Stainless Steel - XHSA458UNCX4

Made in 316 (A4) stainless steel, the UNC Hex Set Bolt (Full Thread) is a hex head bolt threaded along its full length (also sold as a hex set screw). The full thread lets it run right up to the head and suits tapped holes and thin joints.

This listing has 82 variants covering sizes 1/4" to 1" and lengths 1/2" to 4". Variants are supplied in packs of 10 to 100, depending on size.

Made from 316 (A4) stainless steel, the grade normally specified for chloride-exposed work such as coastal installations, swimming pools, marine fittings and food-processing plant. 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

• Screwing into tapped holes in machinery, brackets and plates
• Coastal and marine installations
• Thin sections where a partly threaded bolt would not clamp
• Marine, coastal and washdown fittings
• Small sizes for enclosures, instruments and light fittings
• Larger sizes for frames, plant and structural fixings

Features

• Hex head for spanner or socket tightening
• Lengths from 1/2" to 4"
• Pack quantities to suit trade and bulk buying: packs of 10 to 100
• Range covers 1/4" to 1" in 82 variants
• A4 (316) stainless steel with molybdenum, for coastal and chloride-exposed settings
• Threaded full length for tapped holes and thin joints

Key specifications

Selecting the right option

A fully threaded bolt is the usual choice for tapped holes. Where the joint is loaded sideways, a partly threaded hex bolt keeps a plain shank in the shear plane. Use anti-seize on the thread, because stainless threads can gall when tightened. For indoor and general outdoor use where chlorides are not a concern, the A2 (304) version is the lower-cost option: UNC Hex Set Bolt (Full Thread) - 304 Stainless Steel.

Related products

Other versions in this range: Metric Hex Set Bolt (Full Thread) - 304 Stainless Steel and BSW Hex Set Bolt (Full Thread) - 316 Stainless Steel. Matching products: UNC Standard Hex Nut - 316 Stainless Steel, UNC Hex Lock Nut - 316 Stainless Steel and UNC Hex Nylon Insert Lock Nut - 316 Stainless Steel.