Anchor Bolt Specifications

A307A

APPLICATION

This bolt spec is the most commonly used for any general application for bolting. This bolt spec is for bolts, anchor bolts and studs that have a minimum tensile strength of 60 KSI and these bolts are used for general applications.

Grades

AHeaded bolts, threaded rods and bent bolts intended for general applications.
BHeavy hex bolts and studs intended for flanged joints in piping systems with cast iron flanges.
CNonheaded anchor bolts, either bent or straight, intended for structural anchorage purposes. The end of a grade C anchor bolt intended to project from the concrete will be painted green for identification purposes. Permanent marking is a supplemental requirement.

Chemical Properties

ElementGrade AGrade B
Carbon, max0.29%0.29%
Manganese, max1.20%1.20%
Phosphorus, max0.04%0.04%
Sulfur, max0.15%0.05%

Nuts

A563 Grade A hex (NOT HEAVY HEX)

Washers

All A307A Bolts are to be used with standard F844 Washers (SAE + USS)

A193-B7

Application

This bolt spec is commonly used for High pressure connections, Valves, Flanges, Fittings for high temperature use or high pressure service. Primarily used in waterworks projects and pipelines. This bolt spec covers both Heavy Hex Head bolts and Threaded Rod. A193-B7 is High tensile and is one of the strongest grades you can galvanize without getting hydrogen embrittlement. This spec can be a Heavy Hex Bolt, Bent Anchor Bolt, Fully Threaded bolt or Threaded each end bolt.

Grades

B7Alloy steel, AISI 4140/4142 quenched and tempered
B8Class 1 Stainless steel, AISI 304, carbide solution treated.
B8MClass 1 Stainless steel, AISI 316, carbide solution treated.
B8Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened
B8MClass 2 Stainless steel, AISI 316, carbide solution treated, strain hardened

Chemical Properties

ElementB7 (AISI 4140)B8 (AISI 304)B8M (AISI 316)
Carbon0.37 – 0.49%0.08% max0.08% max
Manganese0.65 – 1.10%2.00% max2.00% max
Phosphorus, max0.035%0.045%0.045%
Sulfur, max0.040%0.030%0.030%
Silicon0.15 – 0.35%1.00% max1.00% max
Chromium0.75 – 1.20%18.0 – 20.0%16.0 – 18.0%
Nickel8.0 – 11.0%10.0 – 14.0%
Molybdenum0.15 – 0.25%2.00 – 3.00%

Nuts for B7:

A194-2H Nuts

Washers for B7

F436 hardened Washers – or flat cut washers at customer’s request.

F1554

Application

This Specification covers Anchor Bolts that are Bent, Straight, headed and headless. This sped is for Bolts that are Carbon, Carbon Boron, Alloy or High-strength alloy. This spec is commonly used for Anchoring Structural Supports to concrete foundations, I.E. Columns, column supports, highway signs, street lighting, traffic signals, steel bearing plates and similar applications.

Grades

F1554 Grade 36Low carbon, 36 ksi yield steel anchor bolts
F1554 Grade 55High strength, low alloy, 55 ksi yield steel anchor bolts
F1554 Grade 105Alloy, heat treated, high strength 105 ksi yield steel anchor bolts

Chemical Properties

ElementGrade 36Grades 55
and 105
Sizes up to
3/4		Sizes over
3/4 to 1-1/2		Sizes over
1-1/2 to 4
Carbon0.26%0.27%0.28%
Manganese0.60 – 0.90%0.60 – 0.90%
Phosphorus, max0.04%0.04%0.04%0.040%
Sulfur, max0.05%0.05%0.05%0.050%
Copper, min (when specified)0.20%0.20%0.20%0.20%
A320

Application

A320 is commonly used and best described as a spec for Anchor Bolts being used in cold temperatures that have high impact results in low temperatures. A common application for A320 is for Pressure Valves, flanges, Valves and fittings for low temperatures.

Chemical Properties

ElementL7 (AISI 4140)L43 (AISI 4340)B8 (AISI 304)B8M (AISI 316)
Carbon0.37 – 0.49%0.38 – 0.43%0.08% max0.08% max
Manganese0.65 – 1.10%0.75 – 1.00%2.00% max2.00% max
Phosphorus, max0.035%0.035%0.045%0.045%
Sulfur, max0.040%0.040%0.030%0.030%
Silicon0.15 – 0.35%0.15 – 0.35%1.00% max1.00% max
Chromium0.75 – 1.20%0.70 – 0.90%18.0 – 20.0%16.0 – 18.0%
Nickel1.65 – 2.00%8.0 – 11.0%10.0 – 14.0%
Molybdenum0.15 – 0.25%0.20 – 0.30%2.00 – 3.00%

Mechanical Properties

Grade Size Tensile,

ksi, min

 Yield,

ksi, min

 Charpy Impact

20-ft-lbf

@ temp

 Elong,

%, min

 RA, %, min
L7 Up to 21/2 125 105 -150° F 16 50
L43 Up to 4 125 105 -150° F 16 50
B8

Class 1

 All 75 30 N/A 30 50
B8M

Class 1

 All 75 30 N/A 30 50
B8

Class 2

 Up to 3/4 125 100 N/A 12 35
7/8 – 1 115 80 N/A 15 35
11/8 – 11/4 105 65 N/A 20 35
13/8 – 11/2 100 50 N/A 28 45
B8M

Class 2

 Up to 3/4 110 95 N/A 15 45
7/8 – 1 100 80 N/A 20 45
11/8 – 11/4 95 65 N/A 25 45
13/8 – 11/2 90 50 N/A 30 45

Recommended Nuts and Washers

A194-L7 or L4 Nuts for the L series of the spec

A194-8, 8C, 8T, 8F, 8M, 8LN, and 8MLN

Washers are to conform to F436

A449

Application

This specification is used for general engineering use and when a bolt requires the specifications of A325 but exceed 1-1/2” in diameter (A325 spec only ranges from ½” – 1-1/2”). A449 range from ¼” – 3” Diameter bolts. There are two types of A449, type 1 and type 3 (there was a type 2 but it was withdrawn in 2003). Similar Specifications are A325 and A490. This Spec can be used for Hvy Hex Bolts and Anchor Bolts.

Type

Type 1 – Plain Carbon Steel, Carbon Boron steel, Alloy steel, or Alloy Baron Steel

Type 3 – Weathering Steel

Chemical Properties

Type 1 Bolts
Element Carbon Steel Carbon Boron Steel Alloy Steel Alloy Boron Steel
Carbon 0.30 – 0.52% 0.30 – 0.52% 0.30 – 0.52% 0.30 – 0.52%
Manganese, min 0.60% 0.60% 0.60% 0.60%
Phosphorus, max 0.040% 0.040% 0.035% 0.035%
Sulfur, max 0.050% 0.050% 0.040% 0.040%
Silicon 0.15-0.30% 0.10 – 0.30% 0.15 – 0.35% 0.15 – 0.35%
Boron 0.0005 – 0.003% 0.0005 – 0.003%
Alloying Elements * *
Type 3 Bolts, Class
Element A B C D E F
Carbon 0.33 – 0.40% 0.38 – 0.48% 0.15 – 0.25% 0.15 – 0.25% 0.20 – 0.25% 0.20 – 0.25%
Manganese 0.90 – 1.20% 0.70 – 0.90% 0.80 – 1.35% 0.40 – 1.20% 0.60 – 1.00% 0.90 – 1.20%
Phosphorus 0.035% max 0.06 – 0.12% 0.035% max 0.035% max 0.035% 0.035%
Sulfur, max 0.040% 0.040% 0.040% 0.040% 0.040% 0.040%
Silicon 0.15 – 0.35% 0.30 – 0.50% 0.15 – 0.35% 0.25 – 0.50% 0.15 – 0.35% 0.15 – 0.35%
Copper 0.25 – 0.45% 0.20 – 0.40% 0.20 – 0.50% 0.30 – 0.50% 0.30 – 0.60% 0.20 – 0.40%
Nickel 0.25 – 0.45% 0.50 – 0.80% 0.25 – 0.50% 0.50 – 0.80% 0.30 – 0.60% 0.20 – 0.40%
Chromium 0.45 – 0.65% 0.50 – 0.75% 0.30 – 0.50% 0.50 – 1.00% 0.60 – 0.90% 0.45 – 0.65%
Vanadium 0.020% min
Molybdenum 0.06% max 0.10% max
Titanium 0.05% max

Recommended Nuts:

TypeNut Class and Finish
¼” – 1-1/2” PLAINB, Hex
1-1/2” – 3” PLAINA, Heavy Hex
¼” X 3” – GALV.DH, Heavy Hex
¼” – 3” – Type 3C3, DH3, Heavy Hex

Recommended Washers for A449 would be F436, type 1 or type 3.

A354BD

Application

These specs are used when a heat treated alloy bolt is required, these specs can be used in any form of bolt, Headed Bolt, Anchor Bolt (threaded each end or fully threaded) or bent bolt. A354BD is very similar to A490.

Grade

A354 grade BD bolts are higher in strength than A354 grade BC and equal in strength to ASTM A490 bolts. Unlike ASTM A490 however, the A354 BD specification is unrestricted in its configuration. Since A490 bolts are heavy hex structural bolts and do not exceed 1-1/2″ diameter, specification A354 BD should be considered for anchor bolts, threaded rods, other styles of headed bolts, and bolts larger than 1-1/2″ diameter where similar mechanical properties are desired. A354 grade BD does not require a magnetic particle test as is required by the A490 specification.

Chemical Properties

ElementSizes 1/4 to 1-1/2Sizes above 1-1/2
Carbon0.30 – 0.53%0.35 – 0.53%
Phosphorus, max0.035%0.035%
Sulfur, max0.040%0.05%

Bolt Specifications

A325

APPLICATION

These bolts are intended for use in structural connections. ASTM A325 specifications are manufactured in the diameters ranging from ½” – 1-1/2” Ø. A325 structural bolts have two different types, Type 1 and Type 3 (there was type 2 but it was withdrawn in November 1991). Similar ASTM Specifications are: A449 and A490.

 Types

Type 1 – Medium Carbon, Carbon Boron, or Medium Carbon Alloy Steel

Type 3 – Weathering Steel

Chemical Properties

Type 1 Bolts
ElementCarbon SteelCarbon Boron SteelAlloy SteelAlloy Boron Steel
Carbon0.30 – 0.52%0.30 – 0.52%0.30 – 0.52%0.30 – 0.52%
Manganese, min0.60%0.60%0.60%0.60%
Phosphorus, max0.040%0.040%0.035%0.035%
Sulfur, max0.050%0.050%0.040%0.040%
Silicon0.15-0.30%0.10 – 0.30%0.15 – 0.35%0.15 – 0.35%
Boron0.0005 – 0.003%0.0005 – 0.003%
Alloying Elements**

Recommended Nuts:

TypeNut Class and Finish
1, PLAINA563-C, C3, D DH, DH3 – PLAIN
1, ZINC COATED (GALV)A563-DH, ZINC COATED (GALV)
1, COATED TO F1136, GRADE 3A563-DH – F1136 GRADE 5
3, PLAINA563-C3, DH3 – PLAIN

*PLEASE NOTE A SUITABLE SUBSTITUTE NUT FOR A325 TYPE 1 IS A194 GR. 2H

Recommended Washers:

TypeWasher Class and Finish
1, PLAINF436 PLAIN
1, ZINC COATED (GALV)F436 ZINC COATED (GALV)
1, COATED TO F1136, GRADE 3F436 – F1136 GRADE 3
3, PLAINF436 TYPE 3 – PLAIN
A449

Application

This specification is used for general engineering use and when a bolt requires the specifications of A325 but exceed 1-1/2” in diameter (A325 spec only ranges from ½” – 1-1/2”). A449 range from ¼” – 3” Diameter bolts. There are two types of A449, type 1 and type 3 (there was a type 2 but it was withdrawn in 2003). Similar Specifications are A325 and A490. This Spec can be used for Hvy Hex Bolts and Anchor Bolts.

Type

Type 1 – Plain Carbon Steel, Carbon Boron steel, Alloy steel, or Alloy Baron Steel

Type 3 – Weathering Steel

Chemical Properties

Type 1 Bolts
ElementCarbon SteelCarbon Boron SteelAlloy SteelAlloy Boron Steel
Carbon0.30 – 0.52%0.30 – 0.52%0.30 – 0.52%0.30 – 0.52%
Manganese, min0.60%0.60%0.60%0.60%
Phosphorus, max0.040%0.040%0.035%0.035%
Sulfur, max0.050%0.050%0.040%0.040%
Silicon0.15-0.30%0.10 – 0.30%0.15 – 0.35%0.15 – 0.35%
Boron0.0005 – 0.003%0.0005 – 0.003%
Alloying Elements**
Type 3 Bolts, Class
Element A B C D E F
Carbon 0.33 – 0.40% 0.38 – 0.48% 0.15 – 0.25% 0.15 – 0.25% 0.20 – 0.25% 0.20 – 0.25%
Manganese 0.90 – 1.20% 0.70 – 0.90% 0.80 – 1.35% 0.40 – 1.20% 0.60 – 1.00% 0.90 – 1.20%
Phosphorus 0.035% max 0.06 – 0.12% 0.035% max 0.035% max 0.035% 0.035%
Sulfur, max 0.040% 0.040% 0.040% 0.040% 0.040% 0.040%
Silicon 0.15 – 0.35% 0.30 – 0.50% 0.15 – 0.35% 0.25 – 0.50% 0.15 – 0.35% 0.15 – 0.35%
Copper 0.25 – 0.45% 0.20 – 0.40% 0.20 – 0.50% 0.30 – 0.50% 0.30 – 0.60% 0.20 – 0.40%
Nickel 0.25 – 0.45% 0.50 – 0.80% 0.25 – 0.50% 0.50 – 0.80% 0.30 – 0.60% 0.20 – 0.40%
Chromium 0.45 – 0.65% 0.50 – 0.75% 0.30 – 0.50% 0.50 – 1.00% 0.60 – 0.90% 0.45 – 0.65%
Vanadium 0.020% min
Molybdenum 0.06% max 0.10% max
Titanium 0.05% max

Recommended Nuts:

TypeNut Class and Finish
¼” – 1-1/2” PLAINB, Hex
1-1/2” – 3” PLAINA, Heavy Hex
¼” X 3” – GALV.DH, Heavy Hex
¼” – 3” – Type 3C3, DH3, Heavy Hex

Recommended Washers for A449 would be F436, type 1 or type 3.

A490

Application

These bolts are intended for use in structural connections. ASTM A325 specifications are manufactured in the diameters ranging from ½” – 1-1/2” Ø. A325 structural bolts have two different types, Type 1 and Type 3 (there was type 2 but it was withdrawn in 2002). Similar ASTM Specifications are: A449 and A325.

Grades

Type 1 – Medium Carbon, Carbon Boron, or Medium Carbon Alloy Steel

Type 3 – Weathering Steel

Chemical Properties

Type 1 Bolts
ElementSizes 1/2 to 1-3/8Size 1-1/2
Carbon, max0.30 – 0.48%0.35 – 0.53%
Phosphorus, max0.040%0.040%
Sulfur, max0.040%0.040%
Alloying Elements**

Recommended Nuts:

TypeNut Class and Finish
1, PLAINA563- DH, DH3 – PLAIN
1, COATED TO F1136, GRADE 3A563-DH – F1136 GRADE 5
3, PLAINA563- DH3 – PLAIN

*PLEASE NOTE A SUITABLE SUBSTITUTE NUT FOR A325 TYPE 1 IS A194 GR. 2H

Recommended Washers:

TypeWasher Class and Finish
1, PLAINF436 PLAIN
1, COATED TO F1136, GRADE 3F436 – F1136 GRADE 3
3, PLAINF436 TYPE 3 – PLAIN
A307B

Application:

A307B Bolts are commonly used for flange joints in piping systems with cast iron flanges. A307B Bolts have a tensile strength range of 60-100 KSI. These are very similar to A307 Grade A, only the head dimensions are different; A307A uses a standard Hex head where as the A307B Bolts use a Heavy hex head. This spec ranges in diameters of ¼” – 4”.

Grades

AHeaded bolts, threaded rods and bent bolts intended for general applications.
BHeavy hex bolts and studs intended for flanged joints in piping systems with cast iron flanges.
CNonheaded anchor bolts, either bent or straight, intended for structural anchorage purposes. The end of a grade C anchor bolt intended to project from the concrete will be painted green for identification purposes. Permanent marking is a supplemental requirement.

Chemical Properties

ElementGrade AGrade B
Carbon, max0.29%0.29%
Manganese, max1.20%1.20%
Phosphorus, max0.04%0.04%
Sulfur, max0.15%0.05%

Recommended Nuts

All A307B Bolts are to be used with A563 Grade A Nuts.

Recommended Washers

All A307B Bolts are to be used with standard F844 Washers (SAE + USS)

A354BD

Application

These specs are used when a heat treated alloy bolt is required, these specs can be used in any form of bolt, Headed Bolt, Anchor Bolt (threaded each end or fully threaded) or bent bolt. A354BD is very similar to A490.

Grade

A354 grade BD bolts are higher in strength than A354 grade BC and equal in strength to ASTM A490 bolts. Unlike ASTM A490 however, the A354 BD specification is unrestricted in its configuration. Since A490 bolts are heavy hex structural bolts and do not exceed 1-1/2″ diameter, specification A354 BD should be considered for anchor bolts, threaded rods, other styles of headed bolts, and bolts larger than 1-1/2″ diameter where similar mechanical properties are desired. A354 grade BD does not require a magnetic particle test as is required by the A490 specification.

Chemical Properties

ElementSizes 1/4 to 1-1/2Sizes above 1-1/2
Carbon0.30 – 0.53%0.35 – 0.53%
Phosphorus, max0.035%0.035%
Sulfur, max0.040%0.05%
A354BC

Application

These specs are used when a heat treated alloy bolt is required, these specs can be used in any form of bolt, Headed Bolt, Anchor Bolt (threaded each end or fully threaded) or bent bolt.  A354BC is very similar to A325.

Grades
Lower in strength than grade BD

Chemical Properties

ElementSizes 1/4 to 1-1/2Sizes above 1-1/2
Carbon0.30 – 0.53%0.35 – 0.53%
Phosphorus, max0.035%0.035%
Sulfur, max0.040%0.05%
A193-B7

Application

This bolt spec is commonly used for High pressure connections, Valves, Flanges, Fittings for high temperature use or high pressure service. Primarily used in waterworks projects and pipelines. This bolt spec covers both Heavy Hex Head bolts and Threaded Rod. A193-B7 is High tensile and is one of the strongest grades you can galvanize without getting hydrogen embrittlement. This spec can be a Heavy Hex Bolt, Bent Anchor Bolt, Fully Threaded bolt or Threaded each end bolt.

Grades

B7Alloy steel, AISI 4140/4142 quenched and tempered
B8Class 1 Stainless steel, AISI 304, carbide solution treated.
B8MClass 1 Stainless steel, AISI 316, carbide solution treated.
B8Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened
B8MClass 2 Stainless steel, AISI 316, carbide solution treated, strain hardened

Chemical Properties

ElementB7 (AISI 4140)B8 (AISI 304)B8M (AISI 316)
Carbon0.37 – 0.49%0.08% max0.08% max
Manganese0.65 – 1.10%2.00% max2.00% max
Phosphorus, max0.035%0.045%0.045%
Sulfur, max0.040%0.030%0.030%
Silicon0.15 – 0.35%1.00% max1.00% max
Chromium0.75 – 1.20%18.0 – 20.0%16.0 – 18.0%
Nickel8.0 – 11.0%10.0 – 14.0%
Molybdenum0.15 – 0.25%2.00 – 3.00%

Nuts for B7:

A194-2H Nuts

Washers for B7

F436 hardened Washers – or flat cut washers at customer’s request.

A394
SAE J429 GR. 5/GR. 8

Application

SAE J429 is a spec that in intended for use in the automotive industry and similar industries. There are different types of grades for this spec that covers bolts, anchor bolts and studs – 1, 2, 3, 4, 5, 5.1, 5.2, 8, 8.1 and 8.2 in diameters up to 1-1/2”. Most commonly used and manufactured are Grade 5 and 8. Grade 2 is very similar to A307 and usually offered as A307 instead of Gr. 2.

 Chemical Requirements

GradeMaterialCarbon, %Phosphorus, %Sulfur, %Grade Marking
1Low or Medium Carbon Steel0.55 max0.030 max0.050 maxNone
2Low or Medium Carbon Steel0.15 – 0.550.030 max0.050 maxNone
5Medium Carbon Steel0.28 – 0.550.030 max0.050 max
8Medium Carbon Alloy Steel0.28 – 0.550.030 max0.050 max

Mechanical Properties

GradeNominal Size, inchesFull Size Proofload, psiYield Strength, min, psiTensile Strength, min, psiElong, min, %RA, min, %Core Hardness, RockwellTempering Temperature, min
11/4 thru 1-1/233,00036,00060,0001835B7 to B100N/A
21/4 thru 3/455,00057,00074,0001835B80 to B100N/A
Over 3/4 thru 1-1/233,00036,00060,0001835B70 to B100
51/4 thru 185,00092,000120,0001435C25 to C34800F
Over 1 thru 1-1/274,00081,000105,0001435C19 to C30
81/4 thru 1-1/2120,000130,000150,0001235C33 to C39800F

Nuts

Standard J995Finish Hex Nuts and Standard SAE or USS Washers is recommended.