ASTM F432

ASTM F432 Roof & Rocket Bolting Specification

Roof & Rocket Bolts, Double end threaded and slotted steel bars, fully grouted bolts and threaded bars, mechanical anchorage devices used for point anchorage applications

Overview

Adfast Component LTD: High-Quality Ground Support Solutions

Adfast Component LTD proudly offers a wide range of products compliant with ASTM F432 specifications, ensuring top-notch quality and reliability for ground support systems. Our offerings include double-end threaded and slotted steel bars, fully grouted bolts, threaded bars, and mechanical anchorage devices for point anchorage applications. We also specialize in roof truss systems, partially grouted deformed bolts, and formable anchorage devices designed to meet the highest safety standards.

In addition, Adfast Component LTD provides advanced solutions like cable bolt systems, expandable rock bolts, and other frictional anchorage devices. All these products are meticulously designed to deliver superior performance in roof and rock stabilization. Trust Adfast for your construction and mining needs, where quality meets innovation.

Related Specifications

Appropriate Nuts

Bolt, Threaded Bar, or Threaded Slotted Bar Grade	Nut Specification
30 (regular strength)	A194/A194M, Grade 1; A563, Grade B
55 (high strength)	A194/A194M, Grade 1; A563, Grade B
75 (extra high strength)	A194/A194M, Grade 2; A563, Grade C

Chemical Composition

Product	Carbon, max, %		Sulfur, max, %		Phosphorus, max, %
Product	Heat	Product	Heat	Product	Heat	Product
Bolts, threaded bars, and threaded slotted bars^A	0.75	0.79	0.13	^B	0.050	0.058
Steel tapered wedges	0.80	0.84	0.13	^B	0.050	0.058
Hardened spherical, flat, or beveled washers	0.80	0.84	0.050	0.058	0.050	0.058
Spherical or beveled washers	0.80	0.84	0.050	0.058	0.050	0.058
Bearing and header plates	1.00	1.04	0.050	0.058	0.050	0.058
Steel threaded tapered plugs	0.60	0.64	0.13	^B	0.050	0.058
Steel expansion shells	0.30	0.33	0.050	0.058	0.050	0.058
(A) Bars furnished in accordance with Specification A615/A615M may be substituted for these requirements. (B) Check analysis for sulfur if a resulfurized steel is not technically appropriate.

Mechanical Requirements

Designation^A	Nominal Diameter, in^B	Minimum yield strength, psi ^C
33	1.33	60 000
39	1.54	60 000
46	1.81	50 000

Tensile
Load Support
Plug Grade

Grade	Nominal Diameter, in.^C	Yield Point min, psi	Tensile Strength min, psi	Elongation in 8 in. or 200 mm Minimum, %
ASTM F432 Grade 40^D	³/₄ -1¹/₂	40 000	70 000	12
ASTM F432 Grade 55	⁵/₈ -1¹/₂	55 000	85 000	12
ASTM F432 Grade 60^D	⁵/₈ -1¹/₂	60 000	90 000	9
ASTM F432 Grade 75	⁵/₈ -1¹/₂	75 000	100 000	8
ASTM F432 Grade 100	⁵/₈ -1¹/₂	100 000	125 000	6
(A) Designation denotes traditional reference to nominal millimeter diameter measurement as previously established. (B) As measured across bolt diameter perpendicular to the slot as indicated in Fig. 7. (C) Per Specification A1011/A1011M.

Nominal Diameter (in.)/Thread /in.	Thread Stress Area, in.²	Grade
		40^B		55		60^B		75		100
		Yield lbs ^C	Ultimate lbs ^C	Yield lbs ^C	Ultimate lbs ^C	Yield lbs ^C	Ultimate lbs ^C	Yield lbs ^C	Ultimate lbs ^C	Yield lbs ^C	Ultimate lbs ^C
⁵/₈ -11	0.226	^D	^D	12 400	19 200	13 600	20 300	17 000	22 600	22 600	26 300
³/₄ -10	0.334	13 400	23 400	18 400	28 400	20 000	30 100	25 100	33 400	33 400	41 800
⁷/₈ -9	0.462	18 500	32 300	25 400	39 300	27 700	41 600	34 700	46 200	46 200	57 800
1-8	0.606	24 200	42 400	33 300	51 500	36 400	54 500	45 500	60 600	60 600	75 800
1¹/₈ -7	0.763	30 500	53 400	42 000	64 900	45 800	68 700	57 200	76 300	76 300	95 400
1¹/₄ -7	0.969	38 800	67 800	53 300	82 400	58 100	87 200	72 700	96 900	96 900	121 100
1³/₈ -6	1.155	46 200	80 900	63 500	96 200	69 300	104 000	86 600	115 500	115 500	144 400
1¹/₂ -6	1.405	56 200	98 400	77 300	119 400	84 300	126 500	105 400	140 500	140 500	175 600
(A) Tests of bolts and threaded bars shall be performed using full-diameter products. (B) Information for Gr 40 and 60 only applies to deformed bars. (C) Required yield and tensile loads shown are calculated by multiplying thread stress areas times the yield point and tensile strength values shown in Table 3. Thread stress area is calculated from the mean root and pitch diameters of adrenal threads as follows: (D) 5/8 in. Gr 40 products are not covered.

Nominal Diameter, in.	Thread Stress Area, min, in.²	Grade 55
Nominal Diameter, in.	Thread Stress Area, min, in.²	Yield Load, min, lbf ^B	Ultimate Tensile Load, min, lbf ^B
1	0.606	30 000	46 400
1¹/₄	0.969	48 000	74 200
1³/₈	1.155	57 200	88 400
1¹/₂	1.405	69 600	107 500
(A) Tests of bolts, threaded bars, and threaded slotted bars shall be performed using full-diameter products. (B) Required yield and tensile loads shown are calculated by multiplying thread stress areas times the yield point and tensile strength values shown in Table 2. Thread stress area is calculated from the mean of the mean root and pitch diameters of Class 3 external threads as follows: where: A_s = stress area, in.² D = nominal diameter, in., and n = number of threads per inch.

Nominal Diameter, in.	Grade 1		Grade 2		Grade 3		Grade 4
Nominal Diameter, in.	MNSL^A	MUL^B	MNSL^A	MUL^B	MNSL^A	MUL^B	MNSL^A	MUL^B
¹/₂	7.0	14.2	10.7	17.0	13.5	19.9	16.3	22.7
⁵/₈	12.4	22.6	17.0	27.1	21.5	31.6	26.0	36.1
³/₄	18.4	33.4	25.1	40.1	31.7	46.8†	38.4	53.4†
⁷/₈	25.4†	46.2	34.7	55.4	40.0	64.7	40.0	73.9
1	33.3	60.6	40.0	72.7	40.0	84.8	40.0	96.9
1¹/₈	40.0	76.3	40.0	91.6	40.0	106.8	40.0	122.0
1¹/₄	40.0	96.9	40.0	116.3	40.0	135.7	40.0	155.0†
1³/₈	40.0	115.5†	40.0	138.6	40.0	161.7	40.0	184.8
1¹/₂	40.0	140.5†	40.0	168.6	40.0	196.7	40.0	224.8
(A) MNSL-Minimum Non-Seizure Load (1000 lb). (B) MUL-Minimum Ultimate Load (1000 lb).

Dimensions

Load Support
Washer Dimension

Designation^A	Nominal Diameter, in.^B	Minimum Ultimate Load, lbs	OD tolerance, in.	Length Tolerance, in. ^C
33	1.33	20 000	± 0.03	+¹/₄ , –¹/₂
39	1.54	23 000	+ 0.02,-0.04	+¹/₄ , –¹/₂
46	1.81	32 500	± 0.03	+¹/₄ , –¹/₂
(A) Designation denotes traditional reference to nominal millimeter diameter measurement as previously established. (B) As measured across bolt diameter perpendicular to the slot as indicated in Fig. 7 (C) Bolt length is measured end-to-end (actual friction stabilizer tubing length).

Bolt Size, in.	Nominal Outside Dimension, (O. D.) in.	Inside Diameter, (I. D.) in.	Thickness, in. (T)

⁵/₈2¹¹/₁₆ to ²⁷/₃₂0.122 to 0.177³/₄2¹³/₁₆ to ³¹/₃₂0.122 to 0.177⁷/₈2¹⁵/₁₆ to 1⁵/₃₂0.132 to 0.177121¹/₈ to 1⁹/₃₂0.132 to 0.1771¹/₈2¹/₂1¹/₄ to 1¹³/₃₂0.132 to 0.1771¹/₄2¹/₂1³/₈ to 1¹⁷/₃₂0.132 to 0.1771¹/₂31⁵/₈ to 1²⁵/₃₂0.132 to 0.177

Coating Specifications

Renowned Brands

Bolting Components Marking

Product Shall be Marked with our manufacturing trade mark Adfast Component LTD along with the designated Grade.
Grade and manufacturer’s identification symbols shall be applied to one end of studs and to the heads of bolts and screws of all sizes. (If the available area is inadequate, the grade symbol may be marked on one end and the manufacturer’s identification symbol marked on the other end.) For bolts and screws smaller than 1⁄4 in. [6 mm] in diameter and studs smaller than 3⁄8 in. [10 mm] in diameter and for 1⁄4 in. [6 mm] in diameter studs requiring more than a total of three symbols, the marking shall be a matter of agreement between the purchaser and the manufacturer.

Grade Headed Plain Bolts	Nominal Product Size	Manufacturer’s Symbol^C	Diameter^D	Grade^E	Length in Inches (or Millimetres)
ASTM F432 Grade GR 40^F	³/₄ – diameter and over	yes	yes	none	yes
ASTM F432 Grade GR 55	⁵/₈ – diameter and over	yes	yes		yes
ASTM F432 Grade GR 60^F	⁵/₈ – diameter and over	yes	yes		yes
ASTM F432 Grade GR 75	⁵/₈ – diameter and over	yes	yes		yes
ASTM F432 Grade GR 100	⁵/₈ – diameter	yes	yes		yes
mark (A) No marks are required on the beveled washers, threaded couplings, or extensions. (B) No other markings may be used to designate additional specifications and will be defined in the manufacturer’s literature. (C) Enter alpha numerical symbol (D) Enter numerical value of bolt or bar diameter measured in eighths, for example, 5. Numerical value of non-full-dimension bar to have numerical value and specific manufacturer designation. Numerical value of full dimension deformed bars to be placed in a circle, for example: (E) Grades greater than 100 psi are to be produced in 20 000-psi increments and marked as follows: 2 for 120 psi, 4 for 140, etc. (F) Grade 40 and 60 only apply to deformed bar. (G) Marking editions noted in Note D of F432-10 shall be implemented as manufacturing tooling changes occur by agreement between the Mine Safety and Health Administration (MSHA) and manufacturers.

Dimensional Standards

ASME Nut Dimensional Standards

B18.2.2 Imperial Square, Hex, Heavy Hex, Lock, Heavy Hex Lock Nuts
B18.22.1 Type A Plain Washers
B18.22.1 Type B Plain Washers

Certification

Testing Standards

E18 Test Methods for Rockwell Hardness of Metallic Materials
E21 Test Methods for Elevated Temperature Tension Tests of Metallic Materials
E112 Test Methods for Determining Average Grain Size
E139 Test Methods for Conducting Creep, Creep-Rupture,and Stress-Rupture Tests of Metallic Materials
E150 Recommended Practice for Conducting Creep and Creep-Rupture Tension Tests of Metallic Materials Under Conditions of Rapid Heating and Short Times
E151 Recommended Practice for Tension Tests of Metallic Materials at Elevated Temperatures with Rapid Heating and Conventional or Rapid Strain Rates
E292 Test Methods for Conducting Time-for-Rupture Notch Tension Tests of Materials
E328 Test Methods for Stress Relaxation for Materials and Structures
E566 Practice for Electromagnetic (Eddy Current) Sorting of Ferrous Metals
E709 Guide for Magnetic Particle Testing
F606/F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets
F1940 Test Method for Process Control Verification to Prevent Hydrogen Embrittlement in Plated or Coated Fasteners
A962/A962M Specification for Common Requirements for Bolting Intended for Use at Any Temperature from Cryogenic to the Creep Range
A788/A788M for Steel Forgings, General Requirements

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Precision Components

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