FULLY THREADED RODS

ASTM A307 Gr.A

Fully threaded rods under the ASTM A307 Grade A standard are recognized for their strength and durability, boasting a minimum yield strength of 36,000 psi. Available in plain steel, zinc CR+3, and Hot Dip galvanized F2329 coatings, these rods, ranging from 1/4 to 4 inches in nominal diameter, excel in various applications. Widely used in construction and manufacturing, they offer reliable connections with corrosion-resistant options. From anchoring structures to fastening components, these rods ensure robust performance in diverse settings.

ASTM A307 Gr.A Specifications

Diameter Availability: From 1/4 to 4 inches in diameter.

Thread Classes: This grade’s thread classes can range from class 1A to 2A upon manufacturers’s general availability.

Default Lengths: This material is generally supplied in 120 inches (10 feet) lengths. However, it is possible to be supplied in 36 inches (3 feet) and 144 inches (12 feet) upon request. We can also manufacture custom lengths for your projects.

Please validate availability or feasibility with our account managers.

There is currently no coating reference table in ASTM A307-21. However, here’s some informations they gave about coating:

4.5.1 When zinc-coated fasteners are required, the purchaser shall specify the zinc-coating process, for example hot dip, mechanically deposited, or no preference.
4.5.2 When hot-dip is specified, the fasteners shall be zinc-coated by the hot-dip process in accordance with the requirements of Specification F2329/F2329M.
4.5.3 When mechanically deposited is specified, the fasten- ers shall be zinc-coated by the mechanical-deposition process in accordance with the requirements of Class 55 of Specification B695.
4.5.4 When no preference is specified, the supplier may furnish either a hot-dip zinc coating in accordance with Specification F2329/F2329M, or a mechanically deposited zinc coating in accordance with Specification B695, Class 55. Threaded components (rods and nuts) shall be coated by the same zinc-coating process and the supplier’s option is limited to one process per item with no mixed processes in a lot.

Chemical Requirements for Grades A and B Bolts, Studs, and Threaded Rod
Chemical Elements	Heat Analysis	Product Analysis
Carbon, max	0.29	0.33
Manganese, max	1.2	1.25
Phosphorus, max	0.04	0.041
Sulfur, max	See Below	See Below
***Grade A	0.15	^A
***Grade B	0.05	0.051

This table is inspired from ASTM A307-21 Table 1

^A Resulfurized steel is not subject to rejection based on product analysis for sulfur.

5. Chemical Composition
5.1 Grade A and B bolts, studs, and threaded rod shall have a heat analysis conforming to the requirements specified in Table 1 based on the steel producer’s heat analysis.
5.2 The purchaser shall have the option of conducting product analyses on finished bolts in each lot, which shall conform to the product analysis specified in Table 1.
5.3 In case of conflict or for referee purposes, the product analysis shall take precedence.
5.4 Bolts and studs are customarily furnished from stock, in which case individual heats of steel cannot be identified.
5.5 Application of heats of steel to which bismuth, selenium, tellurium, or lead has been intentionally added shall not be permitted for Grade B bolts and studs.
5.6 Chemical analyses shall be performed in accordance with Test Methods, Practices, and Terminology A751.

Hardness Requirements for Bolts, Studs, and Threaded Rod
Grade	Nominal Length, in.	Hardness^A
		Brinell		Rockwell B
		min	max	min	max
	Less than 3 × dia^B	121	241	69	100
	3X dia and longer	…	241	…	100
A	Less than 3 × dia^B	121	212	69	95
B	3X dia and longer	…	212	…	95

This table is inspired by ASTM A307-21 Table 2

^A: As measured anywhere on the surface or through the cross section.
^B: Also bolts with drilled or undersize heads. These sizes and bolts with modified heads shall meet the minimum and maximum hardness as hardness is the only requirement.

Tensile Requirements for Full-Size Bolts, Studs, and Threaded Rod
Bolt Size, in.	Threads per inch	Stress Area, ^A, in.²	Tensile Strength, lbf^B
			Grade A, Min ^C	Grade B
			Grade A, Min ^C	min^D	max^D
1/4	20	0.0318	1,900	1,900	3,180
5/16	18	0.0524	3,100	3,100	5,240
3/8	16	0.0775	4,650	4,650	7,750
7/16	14	0.1063	6,350	6,350	10,630
1/2	13	0.1419	8,500	8,500	14,190
9/16	12	0.182	11,000	11,000	18,200
5/8	11	0.226	13,550	13,550	22,600
3/4	10	0.334	20,050	20,050	33,400
7/8	9	0.462	27,700	27,700	46,200
1	8	0.606	36,350	36,350	60,600
1 1/8	7	0.763	45,800	45,800	76,300
1 1/4	7	0.969	58,150	58,150	96,900
1 3/8	6	1.55	69,300	69,300	115,500
1 1/2	6	1.405	84,300	84,300	140,500
1 3/4	5	1.90	114000,	114000,	190,000
2	4 1/2	2.50	150,000	150,000	250,000
2 1/4	4 1/2	3.25	195,000	195,000	325,000
2 1/2	4	4.00	240,000	240,000	400,000
2 3/4	4	4.93	295,800	295,800	493,000
3	4	5.97	358,200	358,200	597,000
3 1/4	4	7.10	426,000	426,000	710,000
3 1/2	4	8.33	499,800	499,800	833,000
3 3/4	4	9.66	579,600	579,600	966,000
4	4	11.08	664,800	664,800	1,108,000

This table is inspired from ASTM A307-21 Table 3

^A: Area calculated from the equation:
A_s = 0.7854 [D − (0.9743/n)] ²

where:
A_s = stress area,
D = nominal diameter of bolt, and
n = threads per inch.

^B: 1 lbf = 4.448 N.
^C: Based on 60 ksi (414 MPa).
^D: Based on 60-100 ksi (414-690 MPa).

Tensile Requirements for Machined Specimens
	Grade A	Grade B
Tensile strength, ksi	60 min	60-100
Yield point, min ksi	***	***
Elongation in 2 in., min, %	18	18

This table is inspired from ASTM A307-21

ASTM A193 Gr.B7

Fully threaded rods under the ASTM A193 Grade B7 standard represent a high-strength option, featuring a minimum yield strength of 105,000 psi. This standard, specific to alloy steel, ensures exceptional mechanical properties suitable for demanding applications. Available in plain steel and Hot Dip galvanized coatings, these rods, ranging from 1/4 to 4 inches in nominal diameter, offer robust solutions for construction, machinery, and industrial projects. Their versatility extends to critical applications where elevated strength and reliable performance are paramount. From structural connections to heavy-duty fastening, ASTM A193 Grade B7 threaded rods provide durability and resilience in challenging environments.

ASTM A193 Gr.B7 Specifications

Diameter Availability: From 1/4 to 4 inches in diameter.

Thread Classes: This grade’s thread classes are of 2A class.

Default Lengths: This material is generally supplied in 144 inches (12 feet) lengths. However, it is possible to be supplied in 36 inches (3 feet) upon request. We can also manufacture custom lengths for your projects.

Please validate availability or feasibility with our account managers.

There is currently no coating reference table in ASTM A193-23. However, here’s some informations they gave about coating:

3.2 Coatings are prohibited unless specified by the purchaser (See Supplementary Requirements S13 and S14). When coated bolting components are ordered the purchaser should take special care to ensure that Appendix X2 is thoroughly understood.
S13 Coatings on Bolting Components
S13.1 It is the purchaser’s responsibility to specify in the purchase order all information required by the coating facility. Examples of such information may include but are not limited to the following:
S13.1.1 Reference to the appropriate coating specification and type, thickness, location, modification to dimensions, and hydrogen embrittlement relief.
S13.1.2 Reference to Specifications A153/A153M, B633, B695, B696, B766, or F1941/F1941M, F2329/F2329M, or Test Method F1940, or other standards.
X2 Coating And Application Limits
X2.1 Use of coated bolting components at temperatures above approximately one-half the melting point (Fahrenheit or Celsius) of the coating is not recommended unless consideration is given to the potential for liquid and solid metal embrittlement, or both. The melting point of elemental zinc is approximately 780 °F [415 °C]. Therefore, application of zinc-coated bolting components should be limited to tempera- tures less than 390 °F [210 °C]. The melting point of cadmium is approximately 600 °F [320 °C]. Therefore, application of cadmium-coated bolting components should be limited to temperatures less than 300 °F [160 °C].

A193 Gr. B7 Chemical Requirements composition, percent)^A
Chemical Elements	Composition	Analysis variation^B
Carbon	0.38 – 0.48^D	0.02
Manganese	0.75 – 1.00	0.04
Phosphorus	0.035	0.005
Sulfur	0.040	0.005
Silicon	0.15 – 0.35	0.02
Chromium	0.80 – 1.10	0.05
Nickel	***	***
Molybdenum	0.15 – 0.25	0.02
Copper	***	***
Niobium^F	***	***
Titanium	***	***
Vanadium Aluminum	***	***
Nitrogen	***	***

This table is inspired by ASTM A193-23 Table 1

^A Values are maximums unless a range or a minimum is indicated. Where ellipses appear in this table, there is no requirement and the element need not be determined or reported. The intentional addition of Bi, Se, Te, and Pb is not permitted.

^B Product Analysis—Individual determinations sometimes vary from the specified limits as shown in the tables. The several determinations of any individual element in a heat may not vary both above and below the specified range. Product variation limits are over for maximums, over or under for ranges, and under for minimums, unless otherwise indicated.

^D For bar sizes over 3 1⁄2 in, inclusive, the carbon content may be 0.50 % max. For the B7M grade, a minimum carbon of 0.28 % is permitted, provided that the required tensile properties are met in the section sizes involved, the use of AISI 4130 or 4130H is allowed.

A193 Gr.B7 Mechanical Requirements
Diameter, in.	Min tempering temperature, °F	Tensile Strength, min ksi	Yield Strength, min, 0.2% offset, ksi	Elongation in 4D, min, %	Reduction of Area, min, %	Hardness, max
2 1/2 and under	1,100	125	105	16	50	321 HBW or 35 HRC
over 2 1/2 to 4	1,100	115	95	16	50	321 HBW or 35 HRC
over 4 to 7	1,100	100	75	18	50	321 HBW or 35 HRC

ASTM F1554 Gr.55

Fully threaded rods under the ASTM F1554 Grade 55 standard are recognized for their reliability, boasting a minimum yield strength of 55,000 psi. Available in plain steel and Hot Dip galvanized coatings, these rods, ranging from 1/2 to 4 inches in nominal diameter, offer sturdy solutions for construction and structural applications. The Grade 55 designation indicates a specific level of strength and ductility suitable for anchor bolts, threaded rods, and other fastening elements. Whether in plain steel for general applications or Hot Dip galvanized for enhanced corrosion resistance, these rods ensure secure connections in diverse environments, making them well-suited for construction projects and infrastructure development.

*ASTM F1554 Gr.55 fully threaded rod are not a regular product. Please ask our account managers for current availability.

ASTM F1554 Gr.55 Specifications

Diameter Availability: From 1/4 to 4 inches in diameter.

Thread Classes: This grade’s thread classes are of 2A class by default. (11.1.1: When an anchor bolt class is not specified, Class 2A shall be furnished.)

Default Lengths: This material is generally supplied in 144 inches (12 feet) lengths. If required, we can also manufacture custom lengths for your projects.

Please validate availability or feasibility with our account managers.

There is currently no coating reference table in ASTM F1554-20. However, section 7 give some details about coating:

7. Protective Coatings
7.1 Zinc, Hot Dip or Mechanically Deposited:
7.1.1 When zinc-coated anchor bolts are required, the purchaser shall specify the coating process, for example, hot dip, mechanically deposited, or no preference. When no preference is specified, the supplier may furnish bolts coated with either process. The supplier’s option is limited to one process per item, with no mixed processes in a lot.
7.1.2 When hot-dip zinc coated anchor bolts are specified, the anchor bolts and nuts shall be zinc-coated in accordance with the requirements of Specification F2329/F2329M.
7.1.3 When mechanically deposited zinc coated anchor bolts are provided, the anchor bolts and nuts shall be zinccoated in accordance with the requirements of Specification B695, Class 55.
7.1.4 Unless otherwise specified, when zinc-coated washers are required, the washers shall be hot-dip zinc-coated in accordance with Specification F2329/F2329M, or mechanically deposited zinc coated in accordance with Specification B695, Class 55. The coating process for the washers need not be the same as that for the anchor bolts and nuts.
7.2 Other Coatings:
7.2.1 When indicated on the inquiry and purchase order, coatings other than those in 7.1 shall be as agreed upon by the purchaser and supplier.

ASTM F1554 Product Marking
Grade	Color
36	Blue
55	Yellow
55 (Weldable^A)	Yellow (projecting end) & White (encased end)
105	Red

This table is inspired from ASTM F1554-20 Section 18 (Product Marking)

^A: See S1

^S1. Weldable Grade 55 Bars and Anchor Bolts

^S1.1 The material described in this section is intended for welding. This supplemental section, by chemical composition restrictions and by a carbon equivalent formula, helps to provide assurance of weldability.

^S1.2 Welding technique is of fundamental importance when bolts produced to this supplementary section are welded. See Note 2.

^S1.3 These supplementary requirements supersede conflicting provisions of the general specification.

^S1.4 Chemical Composition:

^S1.4.1 Steel shall conform to the following limitations: (See table S1.4.1 below)

^S1.4.2 Carbon Equivalent—In addition to the requirements specified in S1.4.1, the analysis shall provide a carbon equivalent (CE) meeting the following requirements:

^S1.4.2.1 For alloy or low-alloy steel, the carbon equivalent shall not exceed 0.45 % when calculated as follows: (See calculus S1.4.1 below)

^S1.4.2.2 For carbon steel, the carbon equivalent shall not exceed 0.40 % when calculated as follows: (See calculus S1.4.2.2 below)

^S1.5 Marking – See 18.1.

Calculus S1.4.2.1

Calculus S1.4.2.2

S.1.41 – Steel shall conform to the following limitations:
Chemical Elements	Heat Analysis	Product Analysis
Carbon, max, %	0.30	0.33
Manganese, max %	1.35	1.41
Phosphorus, max, %	0.040	0.048
Sulfur, max, %	0.050	0.058
Silicon, max, %	0.50	0.55

This table is inspired from ASTM F1554-20 Section S.1.41

Chemical Composition Requirements for ASTM F1554 Gr.55 & Gr.105
Chemical Elements	Heat Analysis	Product Analysis
Carbon, max, %	***	***
Manganese, max %	***	***
Phosphorus, max, %	0.04	0.048^†
Sulfur, max, %	0.05	0.058
Copper, min, % (When specified)	0.20	0.18

This table is inspired from ASTM F1554-20 Table 1

^†Editorially corrected in April 2016.

The table below only apply for Weldable Grade 55 Bars and Anchor Bolts as per supplementary Requirements S1.

S.1.41 – Steel shall conform to the following limitations:
Chemical Elements	Heat Analysis	Product Analysis
Carbon, max, %	0.30	0.33
Manganese, max %	1.35	1.41
Phosphorus, max, %	0.040	0.048
Sulfur, max, %	0.050	0.058
Silicon, max, %	0.50	0.55

This table is inspired from ASTM F1554-20 Section S.1.41

Axial Tensile Properties for Full-Size Tests of F1554-20 Gr.55 Anchor Bolts
Nominal Diam.	Threads/in.	Stress Area, ^B, in.².	Tensile Load, lbf	Yield min, lbf
1/2	13 UNC	0.1419	10,600 – 13,500	7,800
5/8	11 UNC	0.226	17,000 – 21,500	12,400
3/4	10 UNC	0.334	25,000 – 31,700	18,400
7/8	9 UNC	0.462	34,600 – 43,900	25,400
1	8 UNC	0.606	45,400 – 57,600	33,300
1 1/8	7 UNC	0.763	57,200 – 72,500	42,000
1 1/4	7 UNC	0.969	72,700 – 92,100	53,300
1 1/2	6 UNC	1.405	105,000 – 133,000	77,300
1 3/4	5 UNC	1.90	142,000 – 180,000	104,500
2	4 1/2 UNC	2.50	188,000 – 238,000	138,000
2 1/4	4 1/2 UNC	3.25	244,000 – 309,000	179,000
2 1/2	4 UNC	4.00	300,000 – 380,000	220,000
2 3/4	4 UNC	4.93	370,000 – 468,000	271,000
3	4 UNC	5.97	448,000 – 567,000	328,000
3 1/4	4 UNC	7.10	532,000 – 674,000	390,000
3 1/2	4 UNC	8.33	625,000 – 791,000	458,000
3 3/4	4 UNC	9.66	724,000 – 918,000	531,000
4	4 UNC	11.08	831,000 – 1,053,000	609,000

This table is inspired by ASTM F1554-20 Table 2.

^B: Stress areas extracted from ASME B 1.1.

Tensile Properties for Bars and Machined Specimens for F1554 Gr.55
Tensile strength, KSI	75 – 95
Yield strength, min, ksi (0.2% offset)	55
Elongation in 8 in. , min, %^A	18
Elongation in 2 in. min, %^A	21
Reduction of Area, min, %	30

This table is inspired from ASTM F1554-20 Table 3

^A: Elongation in 8 in. applies to bars. Elongation in 2 in. applies to machined
specimens.

ASTM F1554 Gr.105

Fully threaded rods under the ASTM F1554 Grade 105 standard represent a robust and high-strength option, featuring a minimum yield strength of 105,000 psi. Available in plain steel and Hot Dip galvanized coatings, these rods, ranging from 1/2 to 4 inches in nominal diameter, provide exceptional performance for critical applications in construction and structural engineering. The Grade 105 designation signifies superior strength and durability, making these rods suitable for demanding environments where high tensile strength is essential. Whether in plain steel for general use or Hot Dip galvanized for enhanced corrosion resistance, ASTM F1554 Grade 105 threaded rods offer reliable solutions for heavy-duty fastening and anchoring applications.

*ASTM F1554 Gr.105 fully threaded rod are not a regular product. Please ask our account managers for current availability.

ASTM F1554 Gr.105 Specifications

Diameter Availability: From 1/4 to 4 inches in diameter.

Thread Classes: This grade’s thread classes are of 2A class by default. (11.1.1: When an anchor bolt class is not specified, Class 2A shall be furnished.)

Default Lengths: This material is generally supplied in 144 inches (12 feet) lengths. If required, we can also manufacture custom lengths for your projects.

Please validate availability or feasibility with our account managers.

There is currently no coating reference table in ASTM F1554-20. However, section 7 give some details about coating:

7. Protective Coatings
7.1 Zinc, Hot Dip or Mechanically Deposited:
7.1.1 When zinc-coated anchor bolts are required, the purchaser shall specify the coating process, for example, hot dip, mechanically deposited, or no preference. When no preference is specified, the supplier may furnish bolts coated with either process. The supplier’s option is limited to one process per item, with no mixed processes in a lot.
7.1.2 When hot-dip zinc coated anchor bolts are specified, the anchor bolts and nuts shall be zinc-coated in accordance with the requirements of Specification F2329/F2329M.
7.1.3 When mechanically deposited zinc coated anchor bolts are provided, the anchor bolts and nuts shall be zinccoated in accordance with the requirements of Specification B695, Class 55.
7.1.4 Unless otherwise specified, when zinc-coated washers are required, the washers shall be hot-dip zinc-coated in accordance with Specification F2329/F2329M, or mechanically deposited zinc coated in accordance with Specification B695, Class 55. The coating process for the washers need not be the same as that for the anchor bolts and nuts.
7.2 Other Coatings:
7.2.1 When indicated on the inquiry and purchase order, coatings other than those in 7.1 shall be as agreed upon by the purchaser and supplier.

ASTM F1554 Product Marking
Grade	Color
36	Blue
55	Yellow
55 (Weldable^A)	Yellow (projecting end) & White (encased end)
105	Red

Calculus S1.4.2.1

Calculus S1.4.2.2

S.1.41 – Steel shall conform to the following limitations:
Chemical Elements	Heat Analysis	Product Analysis
Carbon, max, %	0.30	0.33
Manganese, max %	1.35	1.41
Phosphorus, max, %	0.040	0.048
Sulfur, max, %	0.050	0.058
Silicon, max, %	0.50	0.55

This table is inspired from ASTM F1554-20 Section S.1.41

Chemical Composition Requirements for ASTM F1554 Gr.55 & Gr.105
Chemical Elements	Heat Analysis	Product Analysis
Carbon, max, %	***	***
Manganese, max %	***	***
Phosphorus, max, %	0.04	0.048^†
Sulfur, max, %	0.05	0.058
Copper, min, % (When specified)	0.20	0.18

This table is inspired from ASTM F1554-20 Table 1

^†Editorially corrected in April 2016.

Axial Tensile Properties for Full-Size Tests of F1554-20 Gr.105 Anchor Bolts
Nominal Diam.	Threads/in.	Stress Area, ^B, in.².	Tensile Load, lbf	Yield min, lbf
1/2	13 UNC	0.1419	17,700 – 21,300	14,900
5/8	11 UNC	0.226	28,200 – 33,900	23,700
3/4	10 UNC	0.334	41,800 – 50,100	35,100
7/8	9 UNC	0.462	57,800 – 69,300	48,500
1	8 UNC	0.606	75,800 – 90,900	63,600
1 1/8	7 UNC	0.763	95,400 – 114,400	80,100
1 1/4	7 UNC	0.969	121,000 – 145,000	102,000
1 1/2	6 UNC	1.405	176,000 – 216,000	148,000
1 3/4	5 UNC	1.90	238,000 – 285,000	200,000
2	4 1/2 UNC	2.50	312,000 – 375,000	262,000
2 1/4	4 1/2 UNC	3.25	406,000 – 488,000	341,000
2 1/2	4 UNC	4.00	500,000 – 600,000	420,000
2 3/4	4 UNC	4.93	616,000 – 740,000	518,000
3	4 UNC	5.97	746,000 – 896,000	627,000
3 1/4	4 UNC	7.10	—	—
3 1/2	4 UNC	8.33	—	—
3 3/4	4 UNC	9.66	—	—
4	4 UNC	11.08	—	—

This table is inspired by ASTM F1554-20 Table 2.

^B: Stress areas extracted from ASME B 1.1.

Tensile Properties for Bars and Machined Specimens for F1554 Gr.105
Tensile strength, KSI	125 – 150
Yield strength, min, ksi (0.2% offset)	105
Elongation in 8 in. , min, %^A	12
Elongation in 2 in. min, %^A	15
Reduction of Area, min, %	45

This table is inspired from ASTM F1554-20 Table 3

^A: Elongation in 8 in. applies to bars. Elongation in 2 in. applies to machined
specimens.

OTHER GRADES

Boulons Plus can supply other grades and types but does not stock them. Please ask our account managers for availability and lead time.