All Thread Rods & Studs Supplier

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All thread rods and studs are used for general-purpose fastening for anything from an anchor bolt to a through bolt. A variety of grades and materials are available, including stainless steel. Threaded rods are available in a variety of strengths. We typically provide low carbon all thread and studs in zinc or galvanized finish. Low carbon all thread (ASTM A307) is used for general applications where a high-strength connection is unnecessary. It is also commonly used for foundation anchor bolts. The most common studs are made from ASTM A193 B7 material. B7 all thread and studs are a heat treated alloy steel used where a higher strength connection is necessary. B7 all thread can be plain finish, zinc, or galvanized.

  • Acme All Thread
  • B-7 All Thread
  • B-7 Studs
  • Galvanized Studs
  • Left Hand All Thread
  • Metric All Thread
  • Nylon All Thread
  • Low Carbon All Thread


All thread rods can be cut and chamfered to studs of specified lengths. These studs can be provided in plain finish, zinc, or galvanized. Typically, B7 studs are set in petroleum and chemical construction applications. This material is used for high-temperature or high-pressure services such as pressure vessels, valves, flanges, and fittings.

Below is a basic summary of a few of the standard grades. ASTM A193 covers many other standard specifications not covered in this description, including B6 and B16.


Bayou City Bolt stocks a full line of US and Metric B7 Studs. Our stock starts at 3/8” diameter and runs through 1-1/2”. Thread pitches include Coarse, Fine, and 8 Thread for the US standard studs. Metric Studs can be had in Coarse or Fine Thread. Other sizes can be cut to length from our B7 All-Thread stock. Most sizes are available, zinc-plated or Xylan-coated as well.

  • B-7 Studs
  • Cylinder Studs


B7 Alloy steel, AISI 4140/4142 quenched and tempered
B8 Class 1 Stainless steel, AISI 304, carbide solution treated.
B8M Class 1 Stainless steel, AISI 316, carbide solution treated.
B8 Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened
B8M Class 2 Stainless steel, AISI 316, carbide solution treated, strain hardened


ASTM A193/A193M Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications
ASTM F593 Standard Specification for Stainless Steel Bolts, Hex Cap Screws, and Studs
ASTM A307 Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile Strength


Grade Size Tensile min ksi Yield min ksi
B7 Up to 2 1/2" 125 105
  2-5/8" - 4" 115 95
  Over 4" 100 75
B8 Class1 All 75 30
B8 Class2 Up To 3/4" 125 100
  7/8" - 1 115 80
  1-1/8" - 1-1/4" 105 65
  1-3/8" - 1-1/2" 100 50
B8M Class 1 All 75 30
B8M Class 2 Up To 3/4" 110 95
  7/8" - 1 100 80
  1-1/8" - 1-1/4" 95 65
  1-3/8" - 1-1/2" 90 50

We offer the lowest minimums in the industry, and sell by the piece or in
bulk - you buy only the fasteners you need!

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