Custom Long Socket Head Machine Screws - 8-32 & 8-36 Thread In 4140 Alloy Steel

 

These custom long socket head machine screws were manufactured domestically using 4140 alloy steel material with heat treatment to reach 37-44 Rc hardness.  Two sizes were produced together in this run: 8-32 X 5.43" length with thread length of 5/8" and 8-36 (an odd thread pitch requested for this one) X 6-3/8" with the same 5/8" thread length requirement.  The thread was cut rather than rolled for these parts and the hex drive was broached.  

Custom Long 316 Stainless Steel Screws - 8-32 X 3 Socket Head Cap Screws

These are custom long 316 stainless steel screws at 8-32 X 3 in dimensions, manufactured domestically at a small batch of approximately 40 pieces.  The parts were completed in a relatively quick turnaround time-frame of approximately 4 weeks from order, especially considering the holiday timing.  To allow for the small quantity and speed the hex socket drive was broached instead of using a cold headed approach.  You can see evidence of this at the inside of the recess drive where you would see machining marks instead of the typical clean concave interior seen in cold headed parts.  The partial thread was also cut rather than rolled to allow for the short production run option.

Custom Extra Long Hex Bolts - Partially Threaded 3/8-16 X 14" In 307A Material With Zinc Clear Finish

These are custom extra long hex bolts we have supplied our customer for many years, with shipments of approx 20,000 pcs at a time every 2-3 years.  307A steel material is used with zinc clear finish and all parts are manufactured overseas.  1.5" to 1.688" of thread is rolled on each part and the hex head height is set to .226-.268 inches.  R0.01-0.03 underneath the head is critical for our customer's application, allowing the head to lay as flat as possible against the mating part.