1-1/4-7 Grade 8 Hex Head Cap Screws

1-1/4-7 Grade 8 Hex Head Cap Screws

1-1/4-7 Grade 8 hex head cap screws, USS coarse thread, in lengths from 3" to 12". Available yellow zinc plated and plain (black) (USA and import (Taiwan)). They take a 1-7/8" wrench. Partially threaded lengths have about 2-3/4" of thread (longer on bolts over 6").

Specifications

• Size: 1-1/4-7 (USS coarse)
• Lengths: 3", 3-1/2", 4", 4-1/2", 5", 6", 7", 8", 9", 10", 11", 12"
• Wrench size: 1-7/8"
• 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) & Taiwan

Note: 1-1/4-7 Grade 8 Hex Head Cap Screws are Plain Steel (Black),  Zinc Yellow Plated are available.

Import are High Quality from Taiwan manufactured to SAE J429 Standards.

120,000 psi Proof Load | 130,000 psi (min.) Yield Strength | 150,000 psi (min.) Tensile Strength

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 1-1/4-7 bolt is approx. 2-3/4"
Wrench Size = 1-7/8"

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 1-1/4-7 Grade 8 bolt?
A 1-1/4-7 Grade 8 hex nut, or a Grade 8 / Grade C lock nut in the same coarse thread. Add a hardened 1-1/4" 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.