1/2 (20) UNF x 3 1/2 Inch Hex Bolt, A2 Stainless Steel (ASME B18.2.1)

1/2 UNF Bolt

UNF bolt with a hex head allowing you to apply the required torque easily with a range of conventional tools.

A part threaded bolt with a ‘unified fine thread’ (UNF) manufactured in A2 stainless steel for high corrosion resistance. This makes them a versatile choice for both internal and external applications.

The unthreaded shank below the hex head adds overall strength making this hex head bolt more resistant to vibration and shear forces when installed into the correctly drilled hole.

Engineered for durability and strength, these corrosion resistant stainless-steel hex bolts are widely used across many industries by DIY enthusiasts and professional alike.

1/2 UNF bolt specification

• Thread diameter (TD): 1/2 (20) UNF
  
• Thread per inch (TPI): 20
  
• Length (L): 3 1/2 inch
  
• Thread length (TL): 1.500 inch max
  
• Head width (HW): 0.750 inch max
  
• Head height (HH): 0.323 inch max
  
• Material: A2 stainless steel

Versatile, widely used, and part of a growing range of hex bolts held in stock at competitive prices.

Quantities start from just one to as many as you require to get the job done.

Do you need a FULLY THREADED bolt?

If you require a fully threaded bolt, take a look at our stainless steel 1/2 UNF x 3 1/2 inch hex set screw, which has the thread running up to the underside of the head