1/2-13 Grade 8 Hex Head Cap Screws
1/2-13 Grade 8 Hex Head Cap Screws
1/2-13 Grade 8 hex head cap screws, USS coarse thread, in lengths from 3/4" to 12". Available yellow zinc plated and plain (black) (USA and import (Taiwan)). They take a 3/4" wrench. Partially threaded lengths have about 1-1/4" of thread (longer on bolts over 6").
Specifications
- Size: 1/2-13 (USS coarse)
- Lengths: 3/4", 1", 1-1/4", 1-1/2", 1-3/4", 2", 2-1/4", 2-1/2", 2-3/4", 3", 3-1/2", 4", 4-1/2", 5", 6", 7", 8", 9", 10", 11", 12"
- Wrench size: 3/4"
- Grade: SAE J429 Grade 8, 6 radial lines on the head
- Strength: 150,000 psi min. tensile, 130,000 psi min. yield
- Finish: yellow zinc plated and plain (black)
- Origin: USA and import (Taiwan)
Made in North America (USA / Canada)
The length of a cap screw is measured from the under-head bearing surface to the extreme end of the screw.
(FT)=Full Thread | (PT)=Partial Thread
Thread Length on a 1/2-13 bolt is approx. 1-1/4"
Wrench Size = 3/4"
Stock Photos - to verify Thread Length, goto:
Common Uses
- Heavy equipment and machinery
- Truck, trailer and suspension work
- High load and high vibration joints
FAQ
What nut fits a 1/2-13 Grade 8 bolt?
A 1/2-13 Grade 8 hex nut, or a Grade 8 / Grade C lock nut in the same coarse thread. Add a hardened 1/2" flat washer under the nut.
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.
Full thread or partial thread?
Short lengths are fully threaded (FT). Longer lengths are partially threaded (PT), with a smooth shank under the head. Thread length on a partially threaded bolt is about twice the diameter plus 1/4" for lengths up to 6", and twice the diameter plus 1/2" for longer lengths.
Related: All Grade 8 Coarse | Grade 8 Fine Thread | Grade 8 Hex Nuts | Grade 8 SAE Flat Washers | Grade 8 Split Lock Washers
Free shipping on orders over $100, and orders placed before noon EST ship the same day. Purchase orders are accepted from government agencies, schools, hospitals, municipalities and companies with established credit with The Nutty Company, Inc.
