B7 Studs

Attractive Mediaz on December 11, 2021

B7 Studs

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Alloy Steel, AISI 4140/4142 Quenched and Tempered

These Grade B7 threaded rods meet the pressure and temperature requirements of ASTM A193 and are often used to secure pressure tanks, valves, and flanges.
Zinc yellow-chromate plated steel threaded rods resist corrosion in wet environments.


Blue PTFE-coated steel threaded rods are chemical resistant and have a slippery surface to thread on smoothly. Black-oxide steel threaded rods have a dark surface color and are corrosion resistant in dry environments.

Grade Appropriate A194 2H Heavy Hex Nut

Grade Size Tensile Ksi,min Yield,ksi,min Elong,%,min RA%min HBW HRC
B7 Up to 2-1/2 125 105 16 50 321 max 35 max
2-5/8-4 115 95 16 50
4-1/8-7 100 75 18 50

Hex Head Cap Screws

Attractive Mediaz on December 11, 2021

Hex Head Cap Screws

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Grade 5

Available Grades: Grade 5, Grade 8, 18-8 Stainless Steel, 316 Stainless Steel, Brass, Silicon Bronze, 8.8, 10.9 and other specialty alloys and stainless available upon request.

Made from Grade 5 steel, these screws are suitable for fastening most machinery and equipment. Dimensions meet ASME B18.2.1 specifications. Grade 5 steel hex head screws are marked with three radial lines. Length is measured from under the head.
Black-oxide steel screws are mildly corrosion resistant in dry environments. Zinc-plated steel screws resist corrosion in wet environments. Black ultra-corrosion-resistant-coated steel screws resist chemicals and withstand 1,000 hours of salt spray per ASTM B117. To maintain corrosion resistance, use these screws with black ultra-corrosion-resistant-coated nuts and washers.
Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.
Screws that meet ASTM A449 or SAE J429 comply with specifications and testing requirements for material quality.

Technical Specs

Item Hex Head Cap Screw Drive Size 1/2 in
Material Steel Tensile Strength 120,000psi
Material Grade/Class Grade 5 Rockwell Hardness HRC25
Finish Chrome Plated Dimensional Standards ASME B18.2.1
Thread Size Coarse Material Quality Standards SAE j429
Thread Direction Right Hand System of Measurement Inch
Faster Length 5/8 in Overall Length 5/8 in
Minimum Thread Length 5/8 in Thread Fit 2A
Head Width 1/2 in Thread Style Fully Threaded
Head Height 13/64 in Type Hex Head Cap Screw
Drive Hex Head Style Hex

Grade 5 Hex Head Cap Screws

Grade 5 Steel. Plain or Plated. National Coarse Thread.

DIAMETER THREAD
LENGTH 1⁄4-20 5⁄16-18 3⁄8-16 7⁄16-14 1⁄2-13 9⁄16-12 5⁄8-11 3⁄4-10 7⁄8-91-81 1⁄8-71 1⁄4-71 1⁄-6
3⁄8 S
1⁄2 S S S
5⁄8 S S S
3⁄4 S S S S S
7⁄8 S S S S S
1 S S S S S S S S
1 1⁄4 S S S S S S S S
1 1⁄2 S S S S S S S S S S
1 3⁄4 S S S S S S S S S S
2 S S S S S S S S S S
2 1⁄4 S S S S S S S S S S
2 1⁄2 S S S S S S S S S S S* S* S*
2 3⁄4 S S S S S S S S S S
3 S S S S S S S S S S S* S* S*
3 1⁄4 S S S S S S S S S
3 1⁄2 S S S S S S S S S S S* S* S*
3 3⁄4 S S S S S S S S S S* S* S*
4 S S S S S S S S S S S* S* S*
4 1⁄2 S S S S S S S S S S S* S* S*
5 S S S S S S S S S S S* S* S*
5 1⁄2 S S S S S S S S S S* S* S*
6 S S S S S S S S S S* S* S*
6 1⁄2 S S S S S S S S S S* S* S*
7 S S S S S S S S S S* S* S*
7 1⁄2 S S S S S S S S S S* S* S*
8 S S S S S S S S S S* S* S*
9 S* S* S*
10 S* S* S*
11 S* S* S*
12 S* S* S*

S-Denotes normally stocked

Unlisted items may be available

Grade 5 Hex Head Cap Screws

Grade 5 Steel. Plain or Plated. National Fine Thread.

DIAMETER THREAD
LENGTH 1⁄4-28 5⁄16-24 3⁄8-24 7⁄16-20 1⁄2-20 9⁄16-18 5⁄8-18 3⁄4-16 7⁄8-141-14
1⁄2 S S S
5⁄8 S S S
3⁄4 S S S S S
7⁄8 S S S S S
1 S S S S S S S S
1 1⁄4 S S S S S S S S
1 1⁄2 S S S S S S S S S
1 3⁄4 S S S S S S S S S
2 S S S S S S S S S S
2 1⁄4 S S S S S S S S S S
2 1⁄2 S S S S S S S S S S
2 3⁄4 S S S S S S S S S S
3 S S S S S S S S S S
3 1⁄4 S S S S S S S S S
3 1⁄2 S S S S S S S S S S
3 3⁄4 S S S S S S S S S
4 S S S S S S S S S S
4 1⁄2 S S S S S S S S S S
5 S S S S S S S S S S
5 1⁄2 S S S S S S S S S S
6 S S S S S S S S S
6 1⁄2 S S S S
7 S S S S S S S S S
7 1⁄2 S S S S S S S S
8 S S S S S S S S S

S-Denotes normally stocked

Unlisted items may be available

Grade 8

High-tensile Grade 8 hex cap screws are stronger than grades 2 or 5 steel and are commonly used in motors, generators, plumbing applications, automotive suspensions, and construction. These screws hold fast in high-stress areas. Grade 8 steel has 150,000 psi tensile strength and meets ASME B18.2.1 dimensional standards and SAE J429 material quality standards. They come in a zinc yellow, or black oxide finish, or may be armor plated for corrosion resistance. Black oxide screws work well in dry environments, zinc-coated screws resist corrosion in wet environments, and armor-plated screws resist saltwater and acids.

Grade 8 Steel. Plain or Zinc/Yellow Plated. National Coarse Thread.

HEX HEAD CAP SCREWS

Grade 8 Steel. Plain or Zinc/Yellow Plated. National Coarse Thread.

DIAMETER THREAD
LENGTH 1⁄4-20 5⁄16-18 3⁄8-16 7⁄16-14 1⁄2-13 9⁄16-12 5⁄8-11 3⁄4-10 7⁄8-91-81 1⁄8-71 1⁄4-71 1⁄2-6
1⁄2 S S S
5⁄8 S S S
3⁄4 S S S
7⁄8 S S S S
1 S S S S S S
16 S S S S S S S S
18 S S S S S S S S
1 S S S S S S S S S S
1 1⁄4 S S S S S S S S S S
1 1⁄2 S S S S S S S S S S
1 3⁄4 S S S S S S S S S S
2 s S S S S S S S S S S S S
2 1⁄4 S S S S S S S S S S S S S
2 1⁄2 S S S S S S S S S S S S S
2 3⁄4 S S S S S S S S S S S S S
3 S S S S S S S S S S S S S
3 1⁄4 S S S S S S S S S S S S S
3 1⁄2 S S S S S S S S S S S S S
3 1⁄4 S S S S S S S S S S S S S
4 S S S S S S S S S S S S S
4 1⁄2 S S S S S S S S S S S S
5 S S S S S S S S S S S S
5 1⁄2 S S S S S S S S S S S S
6 S S S S S S S S S S S S

S-Denotes normally stocked

Unlisted items may be available

HEX HEAD CAP SCREWS

Grade 8 Steel. Plain or Zinc/Yellow Plated. National Fine Thread.

DIAMETER THREAD
LENGTH 1⁄4-28 5⁄16-24 3⁄8-24 7⁄16-20 1⁄2-20 9⁄16-18 5⁄8-18 3⁄4-16 7⁄8-141-41 1⁄8-121 1⁄4-121 1⁄2-12
3⁄8 S
1⁄2 S S S
5⁄8 S S S
3⁄4 S S S S S
7⁄8 S S S S S
1 S S S S S S S S
1 1⁄4 S S S S S S S S
1 1⁄2 S S S S S S S S S S
1 3⁄4 S S S S S S S S S S
2 S S S S S S S S S S
2 1⁄4 S S S S S S S S S S
2 1⁄2 S S S S S S S S S S S* S* S*
2 3⁄4 S S S S S S S S S S
3 S S S S S S S S S S S* S* S*
3 1⁄4 S S S S S S S S S
3 1⁄2 S S S S S S S S S S S* S* S*
3 3⁄4 S S S S S S S S S S* S* S*
4 S S S S S S S S S S S* S* S*
4 1⁄2 S S S S S S S S S S S* S* S*
5 S S S S S S S S S S S* S* S*
5 1⁄2 S S S S S S S S S S* S* S*
6 S S S S S S S S S S* S* S*
6 1⁄2 S S S S S S S S S S* S* S*
7 S S S S S S S S S S* S* S*
7 1⁄2 S S S S S S S S S S* S* S*
8 S S S S S S S S S S* S* S*
9 S* S* S*
10 S* S* S*
11 S* S* S*
12 S* S* S*

S-Denotes normally stocked

Unlisted items may be available

B16 Studs

Attractive Mediaz on December 11, 2021

B16 Studs

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ASTM A193 Grade B16
Stud Bolts

ASTM A193 Grade B16 stud bolts are high strength fasteners manufactured from heat treated Chromium-Molybdenum-Vanadium steel, quenched and tempered. Added Vanadium allows for operating temperatures higher than that of B7 stud bolts.
Dimensional specifications are governed by ASME B18.31.2. Grade markings consists of both the grade symbol “B16″ and the manufacturer’s identification mark on one end of each stud 3/8″ diameter and larger. Manufacturer’s marking may be placed on other end if insufficient space. Inch series fasteners meeting ASTM A193 Grade B16 specifications are typically used in the power and petrochemical industries on boilers, turbines, and other pressurized equipment with elevated temperatures. ASTM A193 covers the requirements for high temperature and high pressure bolting. A193 B16 all thread studs having diameters above 1” are most common in 8UN thread pitches.

Grade Appropriate Nut – A194 GR7 Heavy Hex Nut

B8 STUDS

Attractive Mediaz on December 11, 2021

B8 STUDS

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Class 1 Stainless Steel, AISI 304, Carbide Solution Treated.
Class 2 Stainless Steel, AISI 304, Carbide Solution Treated, Strain Hardened

ASTM A193 Grade B8 studs are manufactured from AISI 304 stainless steel, and tested to meet A193. Dimensional specifications are governed by ASME B18.31.2. Grade markings consists of both the grade symbol “B8″ and the manufacturer’s identification mark on one end of each stud 3/8″ diameter and larger. Manufacturer’s marking may be placed on other end if insufficient space. A193 grade B8 all thread studs having diameters above 1” are most common 8UN (8 threads per inch). For use in pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. A320 grade B8 studs available for low temperature service.

A193 Mechanical Properties (Grade Appropriate Nut – A194 Heavy Hex Nut)

Grade Size Tensile Ksi,min Yield,ksi,min Elong,%,min RA%min HBW HRC
B8 Class 1 ALL 75 30 30 50 223 max 35 max
B8 Class 2 Up to 3/4 125 100 12 35 321 max 35 max
7/8-1 115 80 15 35
1-1/8- 1-1/4 105 65 20 35
1-3/8- 1-1/2 100 50 28 45

B8M STUDS

Attractive Mediaz on December 11, 2021

B8M STUDS

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Class 1 Stainless Steel, AISI 316, Carbide Solution Treated

ASTM A193 Grade B8 studs are manufactured from AISI 304 stainless steel, and tested to meet A193. Dimensional specifications are governed by ASME B18.31.2. Grade markings consists of both the grade symbol “B8″ and the manufacturer’s identification mark on one end of each stud 3/8″ diameter and larger. Manufacturer’s marking may be placed on other end if insufficient space. A193 grade B8 all thread studs having diameters above 1” are most common 8UN (8 threads per inch). For use in pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. A320 grade B8 studs available for low temperature service.

A193 Mechanical Properties (Grade Appropriate Nut- A194 Grade 8M Heavy Hex Nut

Grade Size Tensile Ksi,Min Yield,Ksi,Min Elong,%,min RA%min HBW HRC
BBM Class 1 ALL 75 30 30 50 223 max 96 max
B8M Class 2 Up to 3/4 110 95 15 45 321 max 35 max
7/8-1 100 80 20 45
1-1/8- 1-1/4 95 65 25 45
1-3/8- 1-1/2 90 50 30 45

anchor bolt

Attractive Mediaz on December 11, 2021

anchor bolt

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ANCHOR BOLTS

Steel

Plain finish

DIAMETER THREAD
LENGTH 1/2 3/4
6 S S
8 S S
10 S S
12 S S
14 S
16 S
18 S

Also available in hot dipped Galvanized

S-denotes normally stocked | Unlisted items may be available

A325

Attractive Mediaz on December 10, 2021

A325

STRUCTURAL BOLT

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A325 and A490 *Dimensions and Tolerances

Grip Determination
Bolt Size Inches To Determine Required Bolt Length Add to Grip Inches
1⁄2 11⁄16
5⁄8 7⁄8
3⁄4 1
7⁄8 1 1⁄8
1 1 1⁄4
1 1⁄8 1 1⁄2
1 1⁄4 1 5⁄8
1 3⁄8 1 3⁄4
1 1⁄2 1 7⁄8

Also Available In Hot Dipped Galvanized

A325 Dimensions

Bolt Diameter Bolt Diameter Width Across Flats Width Across Corners Height Thread Length
Max Basic Max Min Max Min Basic Max Min Basic
1/2 0.515 7⁄8 0.875 0.850 1.010 0.969 5⁄16 0.323 0.302 1.00
5/8 0.642 1/1⁄16 1.062 1.031 1.227 1.175 25⁄64 0.403 0.378 1.25
3/4 0.768 1/1⁄4 1.250 1.212 1.443 1.383 15⁄32 0.483 0.455 1.38
7/8 0.895 1/7⁄16 1.438 1.394 1.660 1.589 35⁄64 0.563 0.531 1.50
1 1.022 1/5⁄8 1.625 1.575 1.876 1.796 39⁄64 0.627 0.591 1.75
1/1⁄8 1.149 1/13⁄16 1.812 1.756 2.093 2.002 11⁄16 0.718 0.658 2.00
1/1⁄4 1.277 2 2.00 1.938 2.309 2.209 25⁄32 0.813 0.749 2.00
1/3⁄8 1.404 2/3⁄16 2.188 2.119 2.526 2.416 27⁄32 0.878 0.810 2.25
1/1⁄2 1.531 2/3⁄8 2.375 2.300 2.742 2.622 15⁄16 0.974 0.902 2.25

A490

Attractive Mediaz on December 10, 2021

A490

STRUCTURAL BOLT

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A325 and A490 *Dimensions and Tolerances

Available in hot dipped galvanized and specialty corrosion resistant coatings upon request.

Bolt size in, Inches To Determine Required Bolt Length Add to Grip, in Inches
1⁄2 11⁄16
5⁄8 7⁄8
3⁄4 1
7⁄8 1 1⁄8
1 1 1⁄4
1 1⁄8 1 1⁄2
1 1⁄4 1 5⁄8
1 3⁄8 1 3⁄4
1 1⁄2 1 7⁄8

Also Available In Hot Dipped Galvanized

A325 Dimensions

Bolt Diameter Bolt Diameter Width Across Flats Width Across Corners Height Thread Length
Max Basic Max Min Max Min Basic Max Min Basic
1/2 0.515 7⁄8 0.875 0.850 1.010 0.969 5⁄16 0.323 0.302 1.00
5/8 0.642 1/1⁄16 1.062 1.031 1.227 1.175 25⁄64 0.403 0.378 1.25
3/4 0.768 1/1⁄4 1.250 1.212 1.443 1.383 15⁄32 0.483 0.455 1.38
7/8 0.895 1/7⁄16 1.438 1.394 1.660 1.589 35⁄64 0.563 0.531 1.50
1 1.022 1/5⁄8 1.625 1.575 1.876 1.796 39⁄64 0.627 0.591 1.75
1/1⁄8 1.149 1/13⁄16 1.812 1.756 2.093 2.002 11⁄16 0.718 0.658 2.00
1/1⁄4 1.277 2 2.00 1.938 2.309 2.209 25⁄32 0.813 0.749 2.00
1/3⁄8 1.404 2/3⁄16 2.188 2.119 2.526 2.416 27⁄32 0.878 0.810 2.25
1/1⁄2 1.531 2/3⁄8 2.375 2.300 2.742 2.622 15⁄16 0.974 0.902 2.25