Hex Head Bolts

Hex Head Bolts are the the most popular fasteners in chemical industry equipments and heat exchanger equipments.

Actually, a hex head bolt and hex head cap screw are actually very different fasteners in terms of how they are manufactured.

Hex Head Bolt Specifications
•  ASME B18.2.1
•  DIN 931 / ISO 4014
•  DIN 933 / ISO 4017 

Hex Head Cap Screw Sizes
•  #00 – 6″
•  M1.2 – M150

The differerence,

Hex Head Bolts

•  Hex bolts have a flat end and lack the washer facing under the head.
•  Appropriate for when mechanical properties are more important than dimensional tolerances.
Hex Head Cap Screw

•  Features flat washer facing under the bolt head.
•  Precise applications where tight tolerances on the body dimensions are required.
•  Also called a finished hex bolt.

Usually, it’s a set with hex nut

•  DIN934

It also has inch size and standard, heavy hex nuts and jam nuts

•  ASME B18.16.3
•  ASME B18.2.2

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