12 Point Flange Bolts - (USS) Coarse
12 point flange bolts in USS coarse thread, from 1/4-20 to 3/4-10 and 1/2" to 4" long. They are 170,000 psi high tensile alloy steel with a thermal black and oil finish. The compact 12 point head with a built-in flange fits tight spaces where a hex head won't. Choose a size below.
Specifications
- Head: 12 point with flange
- Material: high tensile alloy steel, 170,000 psi min. tensile
- Thread: USS coarse (UNC)
- Sizes: 1/4-20, 5/16-18, 3/8-16, 7/16-14, 1/2-13, 5/8-11, 3/4-10
- Finish: thermal black with oil
Common Uses
- Racing and performance engines
- Aircraft ground support and machinery
- Tight spaces and counterbored holes
FAQ
Why a 12 point head?
A 12 point head is smaller than a hex head for the same bolt, so it fits tight spaces and counterbores, and the 12 points let a wrench grip from more angles. Use a 12 point socket.
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: 12 Point Flange Bolts Fine Thread | Grade 8 Flange Bolts | Grade 8 Hex Nuts | Socket Head Cap Screws
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.