Threaded Studs
- Tap-end Studs
- Double-end Studs
- Single-end Studs
- All Thread Studs
- Collars
- Specials
| Tap-end studs have a short thread on one end, called the tap end which is threaded to a Class NC5 or Class UNC-3A fit. This end is for screwing into a tapped hole. The other nut end is threaded with a Class UNC-2A fit. Length of the stud is measured overall. The tap end has a chamfered point, but the nut end may have either a chamfered or round point, at the manufacturer's option. Tap-end studs are available in four types, as follows: |  |
| Type 1: Unfinished, having a full diameter but no standard body tollerances | |
| Type 2: Finished, having either an undersized body with rolled threads or a full size body with cut threads, at the manufacturer's option. The body portion will be finished to a minimum Class 2A pitch diameter or maximum basic major diameter of the nut-end thread. | |
| Type 3: Finished full-body, having tolerences equal to that on major diameter of Class 2A threads | |
| Type 4: Finished closed-body, milled or ground to tolerances specified by the user. |
| Double-end studs have equal-length threads on each end to accommodate a nut and are threaded to a Class 2A fit. Length of stud is measured overall. Both ends have chamfered points, but round point may be furnished on either or both ends at the manufacturer's option. This style is furnished in the same four types list for tap-end studs. Double-end studs are used for flange bolting or other applications where torquing from both end is necessary or desirable. |  |
| All thread studs are threaded end to end and are often used for flange bolting with two nuts applied. |  |
| Type 1: General purpose. The length of this type is measured end to end. Threads are UNC-2A. | |
| Type 2: Studs for temperature-pressure piping. These studs are made to the dimensional standard requirements of ANS B16.5 and have a length measurement different from all other studs, i.e. the length is measured from first thread to first thread, exclusive of points. Points are flat and chamfered. Threads are UNC-2A for all sizes 1in. and under and 8UN-2A for all sizes over 1in. |