Name: Hex Head Cap Screw, Wear Resistant Finish, Heavy Duty Performance
Brand: Delta Fitt Inc
Availability: InStock
Rating: 5 (16 reviews)

Question 1

What is a hex head cap screw and how is it different from a hex bolt?

Accepted Answer

A hex head cap screw is a threaded fastener with a hexagonal head and a washer face under the head for better load distribution. Unlike a hex bolt, it is typically manufactured with tighter tolerances and is meant to be installed in pre-tapped holes, while hex bolts are usually used with nuts.

Question 2

What are the standard sizes and thread types for hex head cap screws?

Accepted Answer

Hex head cap screws are available in standard sizes ranging from M3 to M64 in metric and #4 to 2 inches in imperial. Common thread types include coarse (UNC) and fine (UNF) in imperial, and metric coarse and metric fine in metric series, depending on the application and load requirements.

Question 3

What standards and specifications apply to hex head cap screws (e.g., ASTM, ISO)?

Accepted Answer

Hex head cap screws are governed by standards such as ASTM A193, ASTM A307, ISO 4014, ISO 4017, DIN 933, and DIN 931. These standards specify dimensions, mechanical properties, material grades, and performance requirements to ensure quality and consistency in industrial applications.