Custom Automotive Hex Flange Bolts

 

These custom long automotive hex flange bolts were manufactured for our customer to Grade 10.9 specifications with black zinc finish.  100MM of M13-1.75MM thread was rolled behind a 84MM unthreaded shoulder.  The flange diameter was set to 50MM and the hex above to 19MM across the flats.  Black zinc finish is good for corrosion resistance but is always cosmetically tricky due to the imperfections you get on the surface from the bake process, as well as the tumbling of large parts during packaging and transport.  

Custom Tapered Shoulder Socket Head Bolts

 

These custom tapered shoulder socket head bolts were manufactured using 4140 alloy steel material with 28-32 HRC hardness and zinc clear finish.  The shoulder diameter tapers form 0.78" down to 0.75" and the head diameter was set to 1.00 +/-.015".  Underneath the shoulder approximately .55" of 3/8-24 2A thread was rolled with thread relief allowance of roughly .085".  

Custom Drilled Hole Grade 10.9 Carriage Bolts

 

These custom carriage bolts were produced to our customer's drawing to class 10.9 characteristics with black oxide finish.  Approximately 27MM of M10-1.5MM 6G thread was rolled underneath the square shoulder and a 3MM hole was drilled through one side of the shoulder.  The square shoulder was produced to 10MM across the flats. Under the head a R45 radius was maintained to match the mating washer.

Custom Grade 5 Rounded Hex Nuts

 

These custom grade 5 hex nuts were manufactured with both sides rounded to match the mating fitting internal radius.  Production was done with cold forming process and parts were made to a 17MM across the flats dimension and an overall height of 14MM at the maximum.  M10-1.5 6H thread was tapped with a standard chamfer on each side.  Commercial zinc clear finish was run to complete the parts, with accompanying bake.  

Custom 3/8-24 Slotted Alloy Steel Lock Nuts

 

These custom slotted lock nuts were manufactured using 4140 alloy steel material heat treated to 28-32 HRC.  A 5% taper on the shoulder was required which created some difficulties in modifying the cold heading equipment to meet the required tolerances.  The outside diameter was set to 1.00" and the tapered shoulder reaches 0.75" at its minimum.  Parts were run through black oxide process as the final step in the production process.

Custom T651 Aluminum Precision Machined Anodized Washers

 

These custom precision machined washers were manufactured for our electronics customer using 6061-T651 aluminum material with a flash hard anodize finish.  The ID was set to 1.015-1.005" and OD at 1.625".  One of the corners required a R.062 machined radius and the washer thickness had to be between .125" and .135".  Full certs were provided with the parts.

Custom Socket Drive Partially Threaded Electronics Studs

 

We supplied these custom socket drive partially threaded studs to our electronics customer in 316 stainless steel material with plain finish.  A cold formed socket 3MM hex drive was incorporated on the threaded side and M6-1.0 thread was rolled to a length of 26MM.  The unthreaded side measures 19MM in length and 4MM in diameter with slightly chamfered corners.  

Custom Black Injection Molded ABS Spacer Blocks

 

These custom black injection molded parts were manufactured using recycled ABS material in black for our specialty OEM customer.  They were manually cutting sections of long rods on the production floor prior to our supply of the custom sized part to save time and overall cost for the application.  Dimensionally the parts measured .25" at square cross section and .50" in overall length, with slightly rounded edges. 

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.