5/8 (18) UNF x 5 1/2 Inch Hex Bolt, Bright Zinc Plated Grade 8.8 (ASME B18.2.1)

5/8 UNF Bolt

5/8 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 from grade 5 (8.8) steel with a bright zinc plating (BZP) which offers a mid-level resistance to corrosion.

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 to get the job done and widely used across many industries by DIY enthusiasts and professional alike.

5/8 UNF bolt specification

• Thread diameter (TD): 5/8 (18) UNF
  
• Thread per inch (TPI): 18
  
• Length (L): 5 1/2 inch
  
• Thread length (TL): 1.750 inch max
  
• Head width (HW): 0.938 inch max
  
• Head height (HH): 0.403 inch max
  
• Material: Grade 5 (8.8) steel
  
• Finish: BZP bright zinc plated

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.

Don’t forget the UNF hex nuts!

Do you need the UNF hex nuts to go with the bolts? If so, take a look at our BZP 5/8 UNF hex nut.