Custom slotted fillister screws we supplied to our aerospace customer at 100 pieces - ASTM A582 DFARS compliant 303 stainless steel material (Italy Melt) was used for the domestic manufacturing. 2-56 thread was incorporated at .25-.37" in length, with the overall length underneath the head at .625 +0/-.030". The head height measures .070-.095" and the slot depth is set at .033-.043". Head diameter was set between .145" and .161". Full certs were provided with the parts per our customers usual requirements.
These are custom hex flange screws we supplied to our automotive customer in grade 10.9. The size and thread pitch is relatively common in the marketplace but the 10.9 class is a tricky find. With the large volume required we had the parts domestically produced with black phosphate finish. Measuring M12 X 1.75 X 30MM the hex flange head measured 23-25MM in flange diameter and 14.5-15.0MM across the flats. Head height was set to 12MM +/-1MM, inclusive of the flange. Full certs were available to the customer upon request.
Approximately 34,000 pieces of these custom bead blast flat socket screws were supplied to our customer in the defense manufacturing sector. Half the parts were set at 1.29" length while the other half set to 1.695" length. The same 1/4-28 thread was incorporated on both parts and the socket drive was cold headed. A spherical readius shape was incorporated into the top of the flat head, which is difficult to discern in the photos shown. The head height measured .097" and the head diameter at .375". Glass bead blast process was used to add the matte sand finish desired by our customer.
We supplied our customer a short run supply of these custom slotted pins with partial 6-32 thread. Just over 200 pieces were produced domestically using 304 stainless steel material. The 6-32 thread length was set at 0.18" and all other dimensions were derived from the samples our customer provided us. These parts were relatively simple without any special services or paperwork requirements.