Custom 12 Point Flange Bolts With Internal 3/8-16 Thread

 

We supplied these custom 12 point flange bolts to our automotive customer at 5,000 pieces per size, with size ranging from 12.6MM shoulder diameter X 1.70" to 12.6MM shoulder diameter X 3.2".  4140 alloy steel material was used for the production with heat treatment to reach 39-45HRC hardness.  Black oxide finish was the last step in the production process.  3/8-16 internal thread was tapped on all size configurations to reach a minimum of 18MM in full thread depth.

Custom Automotive 12 Point Bolts - Grade 8

 

We had these custom automotive 12 point bolts manufactured for our aftermarket automotive customer in batches of 20,000-40,000 pieces using 4140 alloy steel material to Grade 8 specifications.  The bolts were finished with either Geomet or Zinc Aluminum and were combined with a Nitrile 70A o-ring to provide a "sealing" effect.  7/16-20 thread was rolled on the part and a .365" X .725" point was incorporated with .125" radius.  The 12 point flange head was cold formed to a height of .350".  Full certs were available with the parts and Level 3 PPAP as well.