These custom dual shoulder screws were manufactured domestically using 316 stainless steel material with plain finish for our medical device customer. M4-0.7 thread was incorporated at the end of the custom screw with a ball point. Two raised shoulders were incorporated with the outside diameter of both at .153 +/- .005" - the captive areas between the shoulders were set to an outside diameter of .133 +/- .005". The head measured .270" X .198" with a standard slotted drive.
These custom internally threaded socket head screws were manufactured domestically using 304 stainless steel material with plain finish. Outside thread was M12-1.75 and the internal thread was set to M8-1.25, threaded all the way through. 10MM X 4MM deep hex socket drive was incorporated with a broach process. For very high volume production this part would likely be made using a cold headed process instead for the hex drive.
We supply five different size configurations of these custom slotted internally & externally threaded studs to our construction customer. 45K plain steel material is used to produce the parts, with plain and light oil finish. This specific slotted stud incorporates 1/4-20 internal thread and 1/2-13 external thread. Both sides are slotted and an extended outer chamfer is required on one side to allow easier installation and removal in the application. While the different variations have other external thread diameters and length they share the same 1/4-20 internal thread requirement.