Grade 8 Hex Tap Full Thread Bolts (USS) Coarse
Grade 8 hex tap bolts, threaded to the head, in USS coarse thread: 3/8-16, 1/2-13, 5/8-11, 3/4-10 and 1"-8, from 2" to 6" long. Choose a size below.
Specifications
- Grade: SAE J429 Grade 8, 150,000 psi min. tensile, 6 radial lines on the head
- Thread: USS coarse, full thread
- Sizes: 3/8-16, 1/2-13, 5/8-11, 3/4-10, 1"-8
- Finish: yellow zinc plated unless otherwise noted
Common Uses
- High strength tapped holes
- Heavy equipment and machinery
- Joints that need full length thread
FAQ
What is a tap bolt?
A tap bolt is a hex bolt threaded all the way to the head. It is used in tapped holes and where the joint needs thread along the full length, such as with a nut close to the head.
How do I know a bolt is Grade 8?
Grade 8 bolts have 6 radial lines on the head, plus the manufacturer's mark. Grade 5 has 3 lines and Grade 2 has none.
How tight should I torque these bolts?
Torque depends on grade, size, thread and lubrication. Use the Bolt Tightening Torque Chart (PDF) on this page as a starting point.
Related: Grade 8 Tap Bolts Fine Thread | Grade 8 Hex Cap Screws | Grade 8 Hex Nuts | Grade 8 USS Flat Washers
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