Screws

Machine Screws
Machine screws are standardized in a variety of head styles. Pan head and round head are the most basic where the head of the screw is on top of the work surface. Flat heads and oval heads are used when the head is countersunk into the work surface. Fillister heads are used in counter bored holes. Machine screws are also available with hex heads.

The most popular drive style on the machine screws we sell is slotted. Due to high set-up costs and the lack of volume in high Nickel alloy machine screws we discourage phillips drives. As an alternative we recommend a hex socket drive.

Nickel Systems handles machine screws #4 and larger. Metric sizes start at 3mm. Inventory consists mainly of overruns from previous orders. Current inventory includes parts in Alloy C276 (Hastelloy C®), Alloy 20 (Carpenter 20®), 316 Stainless, 410 Stainless, and 416 Stainless.