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 A286 Stainless Steel Castle Nuts

 

These are DFARS compliant custom A286 stainless steel castle nuts manufactured domestically in the USA for our aerospace customer.  They incorporate 7/16-26 2A thread and internal diameter of .328 +/- .005".  The cross slots measure .090 +/-.005" and unthreaded shoulders both measuring .394"+0.000/-.004 in diameter by .063" +/-.01.  Full certs including a FAIR are required as a part of the deliverable package.

Custom Flat Stamped Nuts - M8-1.25 Thread

 

We had slightly over 10,000 pieces of the custom flat stamped nuts manufactured using mild steel material with zinc clear finish.  Outside dimensions measured 22.86mm X 16mm with thickness set to 6mm.  M8-1.25 6h thread was tapped with its center approximately 5.6mm from the edge of the nut.  6mm is probably the maximum thickness to allow stamping for this size nut without exhibiting too much variation in thickness along the profile.

Custom Precision Cam Nuts - Mild Steel With Zinc Plating

 

We had 12,000 pieces of these large custom precision cam nuts manufactured in mild steel for our construction component manufacturer.  Overall length measured 91.7MM and max OD at the base was set to 23.88MM.  M8 X 1.25 6g thread was incorporated on both sides and M12 X 1.75 6h thread was tapped in the center of the base.  Both shoulders were tuned to a 13.37-13.48MM diameter.  Material certs and certificate of conformance was provided 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.