Custom Knurled Hardware - Test Knurling Samples For Custom 41L40 Steel Plate Bolts

Over the years we have provided countless custom knurled hardware pieces - below is a snapshot of a custom bolt we are working on producing for a customer that is intended to be hammered into a predrilled steel plate.  We noticed that the spec calls out for diamond knurling but realized that probably won't work for the intended purpose, which is to keep the bolt from spinning after being inserted.

Custom Knurled Shoulder Machine Screws Made To Print - 1/4-20 X 1-1/4 Round Head In Grade 5.1 Zinc Yellow

These are custom knurled shoulder machine screws manufactured domestically in the USA in grade 5.1 steel material with zinc and yellow finish.  Production was run at a relatively small quantity of 4,000 pieces, which was split into two shipments approximately 4 months apart to our OEM customer.  Material certs and dimensional test reports were provided to our customer with the parts, as well as the standard certificate of conformance.  Our internal part number is M111957-2.