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.

Custom M18 Stainless Steel Hex Nuts

 

These custom M18 stainless steel hex nuts were manufactured using 304 stainless steel material with a 1.5 6H thread pitch.  The across the flats dimension tolerance was at 26.16MM-27MM and the thickness at 8.42MM-9MM.  Standard chamfers were incorporated on the corners and full certs provided to comply with our customer's requirements.

Custom Countersunk Double End Studs - 304 Stainless Steel

 

We had 5,000 pieces of these custom countersunk double end studs manufactured for our customer that specializes in frozen drink equipment production.  304 stainless steel material was used and the thread was cut on both sides.  Overall length was 41.66MM +/- 0.5 and both threaded sides incorporated 5/16-18 2A thread, at 10.16MM and 15.24MM in length accordingly.  At the maximum diameter point the countersunk shoulder reaches 11.18MM +/-0.2.

Custom Hex Shoulder Standoffs - 316 Stainless Steel

 

We had these custom hex shoulder standoffs manufactured in 316 stainless steel for a physical and accelerator lab in two thread sizes - M3 and M4 thread sizes with 6g thread fit.  The width across the flats on the hex measured 6.8-7MM and the main shoulder diameter measured 5.6MM +/-.05 and the step down shoulder diameter measuring 4.8MM +/- .05.  The internal female M2 X 0.4 thread was tapped to a depth of 4MM min.  Full certs were provided with the parts to meet our customer requirements.  

Custom Long Machine Screws - 302 Stainless Steel

 Almost 20,000 pieces of these custom long machine screws were manufactured for our injection molding customer, made using 302 stainless steel material with plain finish.  4/40 thread was incorporated with 1" of usable thread minimum on each screw.  Overall length was set to 4.625"-4.725" and the head was a standard philips pan head for a #4 machine screw.  Concentricity was the more difficult aspect of these parts, with the combination of length and #4 diameter making it almost impossible to keep the parts straight after packaging.  

Custom 316 Stainless Steel Shoulder Bolts

 

We had approximately 1,300 pieces of these custom 316 stainless steel shoulder bolts produced domestically in the USA with thread locking patch.  The shoulder measured 3/8" by 1" in length and the thread was rolled to 5/16-18.  Full certs were provided with the parts and the lead time was approximately 8-10 weeks from order confirmation.

Custom Locating Dowel Pins For Gear Units

 

We had 500 pieces of these large custom locating dowel pins manufactured domestically in alloy steel material, with heat treat to achieve 47-58 HRC core hardness.  The original drawings were fairly aged and it was difficult to figure out how the transition point between the round and hex portions of the pins should be formed.  We ended up producing samples with two different alternative interpretations and allow the customer to test for the ideal option pictured here.  The round portion of the pin has a diameter of .625" + .0003"/-0" while the hex portion across the flats had to meet .7497 +.0002"/-0".  Overall length was set to 1.4375".  Full certs with FAIR were available with the parts.

Custom Stamped Bent L-Shaped Bolts

These custom stamped bent L-shaped bolts were manufactured with a cold formed/stamped stop shoulder critical to the assembly application.  5/16-18 thread was incorporated underneath the shoulder/flange feature, at approximately 14.42mm in length.  The unthreaded length measures 31mm on the outside and the flange/shoulder diameter is 17.5mm.  Zinc + clear finish was applied to complete the parts after heat treat.  Full certs were available with the parts.

Custom Knurled Nylon Insert Lock Nuts

 

These custom knurled nylon insert lock nuts were manufactured using SAE J995 class 8 material with zinc clear finish.  3/8-24 internal thread was incorporated with a 45 degree chamfer and a .551-.562 across the flats hex was formed over the nylon insert.  Overall length measured at .519 +/-.03" and the knurled portion measured approximately .34" in length.  This was a tricky part to tool for and to produce - it took us two sample runs to finally get everything dialed in.

Custom Large Stainless Steel Pins

 

We had approximately 10,000 pieces of these custom large stainless steel pins manufactured for a customer installation in Italy.  303 stainless steel was used for production and the pins measured .249" in diameter by 5" in overall length.  A slight 45 degree chamfer was added on both sides to remove any sharp edges.  This was a relatively simple part but needed to be manufactured quickly with all delivery to Italy within 75 days from order.