Custom Grade 8 Torx Round Head Bolts With Black Zinc

 

These custom grade 8 round head bolts were manufactured for our automotive customer to Grade 8 specification with black zinc finish.  Black zinc finish is always tricky for the grade 8 parts because it requires a bake process to limit risk of hydrogen embrittlement.  The bake process creates slight imperfections in the plating which is more apparent with the black.  The head was cold formed with T50 torx drive and the approximately 3 inches of 7/16-20 was rolled.  A .37" X .20" dog point was incorporated at the end with rounded corners.

Custom Grade 8 Automotive Countersunk Hex Flange Bolts

 

These custom grade 8 countersunk hex flange bolts were manufactured for our automotive after market manufacturing customer with zinc yellow finish.  Partial 1/2-13 thread was rolled and the length under the hex (inclusive of the countersunk portion) was set to 2-3/4".  Full certs were made available with the parts.

Custom Grade 8 Torx Flat Head Dog Point Screws

 

These custom grade 8 flat head screws were manufactured for our automotive aftermarket component manufacturing customer - the dog point was incorporated to allow for better ease of use and the finish was plain thermal black oxide.  5/16-18 thread was rolled with an overall length (including the head height) of .875".  Certs were made available upon request but no PPAP was required for this application.

Custom Grade 5 Left Hand Thread Hex Head Bolts

 

We manufactured these custom left hand thread hex head bolts for our customer to grade 5 requirements in plain thermal black oxide finish.  They measured LH 3/4-10 x 2" in length with the hex head measuring 1.100-1.125" across the flats.  Head height was set to .483-.455".  Full certs were made available with the parts.

Custom A286 Socket Head Captive Shoulder Screws

 

These custom A286 socket head captive shoulder screws were manufactured domestically with full certs and FAIR using DFARS compliant A286 material hardened to minimum ultimate tensile strength of 1100 MPA.  The captive shoulder diameter was set to 1.64mm +0/-.05, 2-56 thread length at 3.78", and overall length under the head at 9.04mm +0/-0.76.  Parts were finished with Passivation per AMS2700, Method 1, Type 2, Class 4.