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FULL THREAD STUDS

Full Thread Studs

Full thread studs are made by cutting all thread rod to length or roll-threading pitch diameter cut blanks. One important consideration in ordering full useable thread studs is specifying the length. There are two standards. One is measuring the overall length of the part (this is how we typically supply our studs full-form). The other is measuring from the first full-form useable thread on one end to the first full thread on the other. As studs are generally chamfered on both ends, the first-to-first measurement will be 1 to 2 pitches less than the overall. First-to-first measurements are usually specified in high temperature and high pressure applications, particularly where ASTM A193 is specified.

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Specifications

Nickel Systems stocks a wide range of full thread studs in various nominal diameters & lengths. Use our specifications & technical data below to select your specific stud.

Download our Full Thread Studs Dimensioning Table

Dimensions

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Nominal Size Diameter, D Threads Per Inch Umax = 2 Thread Pitches = 2P
UNC UNF 8UN UNC Threads UNF Threads 8UN Threads
1/4 0.2500 20 28 — 0.100 0.071 —
5/16 0.3125 18 24 — 0.111 0.083 —
3/8 0.3750 16 24 — 0.125 0.083 —
7/16 0.4375 14 20 — 0.143 0.100 —
1/2 0.5000 13 20 — 0.154 0.100 —
9/16 0.5625 12 18 — 0.167 0.111 —
5/8 0.6250 11 18 — 0.182 0.111 —
3/4 0.7500 10 16 — 0.200 0.125 —
7/8 0.8750 9 14 — 0.222 0.143 —
1 1.0000 8 12 — 0.250 0.167 —
1 1/8 1.1250 7 12 8 0.286 0.167 0.250
1 1/4 1.2500 7 12 8 0.286 0.167 0.250
1 3/8 1.3750 6 12 8 0.333 0.167 0.250
1 1/2 1.5000 6 12 8 0.333 0.167 0.250
1 5/8 1.6250 — — 8 — — 0.250
1 3/4 0.1750 5 — 8 0.400 — 0.250
1 7/8 1.8750 — — 8 — — 0.250
2 2.0000 4 1/2 — 8 0.444 — 0.250
2 1/4 2.2500 4 1/2 — 8 0.444 — 0.250
2 1/2 2.5000 4 — 8 0.500 — 0.250
2 3/4 2.7500 4 — 8 0.500 — 0.250
3 3.0000 4 — 8 0.500 — 0.250
3 1/4 3.2500 4 — 8 0.500 — 0.250
3 1/2 3.5000 4 — 8 0.500 — 0.250
3 3/4 3.7500 4 — 8 0.500 — 0.250
4 4.0000 4 — 8 0.500 — 0.250

For common nominal sizes, full thread studs are typically stocked in 1/8″ increments up to 1″ long, in 1/4″ increments from 1″ to 6″ long & in 1/2″ increments from 6″ to 10″ long.

Full Thread Studs Specifications

  • STANDARD (ASME/ANSI)
  • METRIC (IFI)
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FULL THREAD STUDS Available Materials

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Product Overview

Get our product definition, description, related info & applications.

What is a Full Threaded Stud

A full thread stud is a metal alloy rod that has threads over its entire body. Unlike bolts or screws, it does not have a head. They can be connected with a nut or screwed into a tapped hole.

Other names include:

  • Threaded Rod
  • All-Thread Rod
  • Continuous Thread Stud
  • Flange Stud Bolt
  • Stud Bolt
  • Redi-rod
  • Threaded Bar

Key characteristics include:

  • Continuous threads along its full body
  • No head
  • Various thread types including UNC, UNF, Metric, & Acme

Distinction from other Stud Types

Be sure not to confuse full threaded studs with:

  • Double end studs which have threads on both ends but a plain unthreaded section in the middle.
  • Tap-end studs that have different threaded end lengths.
  • Partially threaded rods which only have one end threaded.

Applications & Industries

Below are examples of applications & industries that use full thread studs in exotic alloy material.

High-Temperature Fastening in Boilers and Turbines

  • Use: Secure components exposed to extreme heat and pressure (e.g., turbine casings, heat exchangers).

  • Materials: Inconel 718, Incoloy 800, Incoloy 825

  • Industries: Power generation, petrochemical, nuclear energy.

Corrosion-Resistant Assembly in Chemical Processing

Marine and Subsea Equipment

Cryogenic and Low-Temperature Assemblies

Aerospace Engine and Structural Fastening

Nuclear Reactor and Radiation-Exposed Assemblies

  • Use: Hold together internal reactor structures or radiation-shielded components.

  • Materials: Inconel 718, Hastelloy C-276, Stainless 316L.

  • Industries: Nuclear energy, medical isotopes, research labs.

Downhole and Wellhead Fastening in Harsh Environments

Nickel Systems stocks and supplies a wide range of exotic alloy full threaded studs, ready for fast delivery. If you’re sourcing for critical operations or need custom sizes, our sales team is here to help.

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Product Samples

Check out our full thread stud sample products:

Full Thread Stud 2507 Super Duplex Material

 

a picture of a full thread stud 2507 super duplex material

 

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Industries We Serve

Nickel Systems provides high quality exotic grade materials that hold up in the toughest, most severe heat and corrosive environments. With our large inventory of specialty fasteners in stock, we are always ready to answer the call to serve the most challenging applications.

Nickel Systems stocks all thread rod in Hastelloy® C276 (Alloy C276), Carpenter® 20 (Alloy 20), Duplex 2205, 316 Stainless and 18-8 Stainless, which can be cut to length and shipped in short order. We can also supply studs to A193 specs (B8, B8C, B8M, B8R, B8S, B8T), Monel® (Alloy 400, Alloy 500), AL6XN®, Nitronic® (50 and 60) and other non ferrous materials.

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