Threading
More threading options means faster delivery
With three roll threaders and fourteen cut threaders, Concept Fasteners can thread fasteners for all kinds of projects. Our experienced operators ensure you are delivered quality threaded product that won’t gall or resist a nut, even after galvanizing. Over a century of threading fasteners has resulted in two efficient and cost-effective threading methods capable of handling steel up to 6” in diameter.
Roll Threading (through 1” diameter)
Roll threading is an extrusion process in which steel round bar is forced between two dies to form the threaded portion of a fastener, instead of being removed as in cut threading. In this process, a bolt is manufactured from a reduced diameter round bar. For example, a 1″ diameter bolt is manufactured from .912″ diameter round bar. This “pitch diameter” steel is approximately the midpoint between the major diameter (peaks) and minor diameter (valleys) of the threads. The bolt is “rolled” through a set of threading dies which displace the steel and form the threads. The end result is a fastener with a full 1″ diameter threaded portion but a reduced body diameter (.912″). Roll threading is an extremely efficient process and often results in significant cost savings. Therefore, Concept Fasteners will roll threads whenever possible.
Cut Threading (through 6” diameter)
Cut threading is a process by which steel is cut away from a round bar of steel to form the threads. A 1″ diameter bolt, for example, is produced by cutting threads into a full 1″ diameter body of the bolt. Cut threading is a much more labor-intensive process but provides more flexibility with regard to longer thread lengths and larger diameters.