Finished hex nuts are the most common type of nut. Finished refers to the dimensional standard. Except for some smaller sizes, the width across the flats of the hex is one-and-a-half times the nominal diameter. Thickness of finished hex nuts is approximately 90% of the nominal diameter.
In modern terminology, these parts are usually referred to as regular nuts or simply hex nuts. However, as we at Nickel Systems are old-timers in the fastener business, we still refer to these parts as finished hex nuts.
Nickel Systems maintains an inventory of hex nuts in Hastelloy® (Alloys C276, C22, B2), Carpenter® 20 (Alloy 20), Inconel® 600 (Alloy 600), AL6XN®, Duplex 2205, Nitronic® 60 (A194 8S – Finished Pattern), 317L Stainless, 18-8 Stainless and 316 Stainless in stock at all times. Other alloys currently maintained in hex nut inventory include Nickel 200, 330 Stainless, Hastelloy® B3 and 904L.