Tap End Stud
Studs & Rods · tap-end stud bolt · tap end stud
Definition: A tap end stud has a short thread at one end to screw into a tapped hole, a longer thread at the other for the nut, and an unthreaded body between.
Anatomy
■ Head■ Shank■ Threads■ Point
Governing standards: ASME B18.31.2
Common Sizes
| Inch | Metric | Head width | Head height |
|---|---|---|---|
| 1/4-20 | M6 | — | 1 to 3 long |
| 3/8-16 | M10 | — | 1-1/2 to 4 long |
| 1/2-13 | M12 | — | 2 to 6 long |
Representative sizes. Full dimensional data lives in the standards listed below.
Grades & Strength
| Grade | Material | Tensile (psi) | Marking |
|---|---|---|---|
| Grade B7 | chromium-molybdenum steel | 125,000 | B7 |
| Grade 5 | medium carbon steel, Q&T | 120,000 | 3 radial lines |
Materials
- Alloy steel (B7)
- Stainless steel
- Zinc-plated steel
Pros & Cons
Pros
- Repeated assembly without wearing the hole
- Locates the part precisely
- Nut end only needs access
Cons
- Hole must be tapped
- Longer install than a bolt
- Tap end can seize over time
Typical Uses
- Flanged joints
- Pumps and valves
- Pressure vessels
- Machinery mounting
Alternatives & Related
- Double-End Stud — Equal threads on both ends
- Hex Bolt — Single fastener for simple joints
Where to Buy
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FAQ
What is a tap end stud?
A stud with a short thread on one end that screws into a tapped hole and a long thread on the other for a nut.
Tap end stud vs double end stud?
A tap end stud has unequal ends — a short tap end and a long nut end — while a double end stud has equal threads on both ends.