ASTM A563M

ASTM A563M Nuts Specification

Carbon Steel & Alloy Steel Metric Nuts for general structural and mechanical uses on bolts, studs, and other externally threaded parts

Related Specifications

Overview

ASTM A563M specification covers metric M1.6 to M100 Carbon Steel & Alloy Steel Imperial Nuts for general structural and mechanical uses on bolts, studs, and other externally threaded parts. rades C3 and DH3 nuts have atmospheric corrosion resistance and weathering characteristics comparable to that of the steels covered in Specifications A242/A242M, A588/A588M, and A709/A709M. The atmospheric corrosion resistance of these steels is substantially better than that of carbon steel with or without copper addition. When properly exposed to the atmosphere, these steels can be used bare (uncoated) for many applications. Steel for nuts shall be made by the open-hearth, basic-oxygen, or electric-furnace process except that steel for Grades O, A, and B nuts may be made by the acid-bessemer process. Nuts may be made cold or hot by forming, pressing, or punching or may be machined from bar stock. Threads shall be formed by tapping or machining.

Suitability Guide

Class of Bolt,^A Screw, or Stud	Nominal Diameter of Bolt/Nut Combination	Surface Finish of Bolt^B	Property Class and Dimensional Style of Nut
			5		9			10		12			8S	8S3	10S	10S3
			H1^C	HH^D	H2^E	HF^F	HH^D	H1^C	HF^F	H2^E	HF^F	HH^D	HH^D	HH^D	HH^D	HH^D
F568M, Class 4.6	M5 to M36	plain	G	H	I	I	H	I	I	I	I	I	I	I	I	I
	M5 to M36	zinc-coated	G	H	H	H	H	H	H	I	I	H	H	H	I	H
	M42 to M100	plain	H	G	H	H	I	H	H	H	H	I	H	H	H	H
	M42 to M100	zinc-coated	H	G	H	H	H	H	H	H	H	I	H	H	H	H
F568, Class 4.8	M1.6 to M16	plain	G	H	I	I	H	I	I	I	I	H	H	H	H	H
F568, Class 4.8	M1.6 to M16	zinc-coated	G	H	H	H	H	H	H	I	I	H	H	H	I	H
F568, Class 5.8	M5 to M24	plain	G	H	I	I	H	I	I	I	I	H	I	I	I	I
F568, Class 5.8	M5 to M24	zinc-coated	G	H	H	H	H	H	H	I	I	H	H	H	I	H
F568, Class 8.8	M16 to M36	plain	H	H	G	I	H	I	I	I	I	H	I	I	I	I
	M16 to M36	zinc-coated	H	H	H	H	H	H	H	G	I	H	H	H	I	H
	M42 to M100	plain	H	H	H	H	G	H	H	H	H	I	H	H	H	H
	M42 to M100	zinc-coated	H	H	H	H	H	H	H	H	H	G	H	H	H	H
F568, Class 8.8.3	M16 to M36	plain	H	H	H	H	H	H	H	H	H	H	H	G	H	I
F568, Class 9.8	M1.6 to M16	plain	H	H	G	I	H	I	I	I	I	H	H	H	H	H
F568, Class 9.8	M1.6 to M16	zinc-coated	H	H	H	H	H	H	H	G	I	H	H	H	I	H
F568, Class 10.9	M5 to M36	plain	H	H	H	H	H	G	I	I	I	H	I	I	I	I
F568, Class 10.9	M42 to M100	plain	H	H	H	H	H	H	H	H	H	G	H	H	H	H
F568, Class 10.9.3	M16 to M36	plain	H	H	H	H	H	H	H	H	H	H	H	H	H	G
F568, Class 12.9	M1.6 to M36	plain	H	H	H	H	H	H	H	G	I	H	H	H	I	I
F568, Class 12.9	M42 to M100	plain	H	H	H	H	H	H	H	H	H	G	H	H	H	H
A325M, Types 1 and 2	M16 to M36	plain	H	H	H	H	H	H	H	H	H	H	G	I	I	I
A325M, Types 1 and 2	M16 to M36	zinc-coated	H	H	H	H	H	H	H	H	H	H	H	H	G	H
A325M, Type 3	M16 to M36	plain	H	H	H	H	H	H	H	H	H	H	H	G	H	I
A490M, Types 1 and 2	M16 to M36	plain	H	H	H	H	H	H	H	H	H	H	H	H	G	I
A490M, Type 3	M16 to M36	plain	H	H	H	H	H	H	H	H	H	H	H	H	H	G
A394, Grade A	M12 to M24	zinc-coated	G	H	H	H	H	H	H	I	I	H	H	H	I	H
A394, Grade B	M12 to M24	zinc-coated	H	H	H	H	H	H	H	G	I	H	H	H	I	H
(A) The term “bolt” includes all types of externally threaded products. (B) “Plain” applies to any bolt that is non-coated or non-plated, or that has a coating or plating of insufficient thickness to require that the nut be overtapped. “Zinc-coated” applies to any bolt that is hot-dip or mechanically zinc-coated or otherwise coated or plated with a coating or plating of sufficient thickness to require the use of overtapped nuts. (C) H1-ANSI B 18.2.4.1M hex nut, Style 1. (D) HH-ANSI B 18.2.4.6M heavy hex nut. (E) H2-ANSI B 18.2.4.2M hex nut, Style 2. (F) HF-ANSI B 18.2.4.4M hex flange nut. (G) Recommended nut class and style. (H) Non-suitable nut. (I) Suitable nut class and style.

Chemical Composition

ASTM A563M Chemical Requirements for 5, 9, 8S, 10, 10S and 12 Nuts

Property Class of Nut	Analysis	C	Mn, min	P, max	S, max
5, 9, 8S	heat product	0.55 max 0.58 max	. . . . . .	0.04 0.048	0.15^A . . .
10^B, 10S	heat product	0.55 max 0.58 max	0.30 0.27	0.04 0.048	0.05 0.058
12^B	heat product	0.20-0.55 0.18-0.58	0.60 0.57	0.04 0.048	0.05 0.058
(A) For Classes 5 and 9, a sulfur content of 0.23 % max. is acceptable with the purchasers approval. (B) For Classes 10 and 12, a sulfur content of 0.15 % max. is acceptable provided the manganese is 1.35 % min.

ASTM A563M Chemical Requirements for Classes 8S3 and 10S3 Nuts

Element	Analysis	Steel Analyses for ASTM A563M Class 8S3 Nuts A							ASTM A563M Class 10S3 Nuts
Element	Analysis	N	A	B	C	D	E	F	ASTM A563M Class 10S3 Nuts
C	Heat analysis	. . .	0.33-0.40	0.38-0.48	0.15-0.25	0.15-0.25	0.20-0.25	0.20-0.25	0.20-0.53
C	Product analysis	. . .	0.31-0.42	0.36-0.50	0.14-0.26	0.14-0.26	0.18-0.27	0.19-0.26	0.19-0.55
Mn	Heat analysis	. . .	0.90-1.20	0.70-0.90	0.80-1.35	0.40-1.20	0.60-1.00	0.90-1.20	0.40 min
Mn	Product analysis	. . .	0.86-1.24	0.67-0.93	0.76-1.39	0.36-1.24	0.56-1.04	0.86-1.24	0.37 min
P	Heat analysis	0.07-0.15	0.040 max	0.06-0.12	0.035 max	0.040 max	0.040 max	0.040 max	0.046 max
P	Product analysis	0.07-0.155	0.045 max	0.06-0.125	0.040 max	0.045 max	0.045 max	0.045 max	0.052 max
S	Heat analysis	0.050 max	0.050 max	0.050 max	0.040 max	0.050 max	0.040 max	0.040 max	0.050 max
S	Product analysis	0.055 max	0.055 max	0.055 max	0.045 max	0.055 max	0.045 max	0.045 max	0.055 max
Si	Heat analysis	0.20-0.90	0.15-0.35	0.30-0.50	0.15-0.35	0.25-0.50	0.15-0.35	0.15-0.35	. . .
Si	Product analysis	0.15-0.95	0.13-0.37	0.25-0.55	0.13-0.37	0.20-0.55	0.13-0.37	0.13-0.37	. . .
Cu	Heat analysis	0.25-0.55	0.25-0.45	0.20-0.40	0.20-0.50	0.30-0.50	0.30-0.60	0.20-0.40	0.20 min
Cu	Product analysis	0.22-0.58	0.22-0.48	0.17-0.43	0.17-0.53	0.27-0.53	0.27-0.63	0.17-0.43	0.17 min
Ni	Heat analysis	1.00 max	0.25-0.45	0.50-0.80	0.25-0.50	0.50-0.80	0.30-0.60	0.20-0.40	0.20 minB
Ni	Product analysis	1.03 max	0.22-0.48	0.47-0.83	0.22-0.53	0.47-0.83	0.27-0.63	0.17-0.43	0.17 min
Cr	Heat analysis	0.30-1.25	0.45-0.65	0.50-0.75	0.30-0.50	0.50-1.00	0.60-0.90	0.45-0.65	0.30 min
Cr	Product analysis	0.25-1.30	0.42-0.68	0.47-0.83	0.27-0.53	0.45-1.05	0.55-0.95	0.42-0.68	0.25 min
V	Heat analysis	. . .	. . .	. . .	0.020 min	. . .	. . .	. . .	. . .
V	Product analysis	. . .	. . .	. . .	0.010 min	. . .	. . .	. . .	. . .
Mo	Heat analysis	. . .	. . .	0.06 max	. . .	0.10 max	. . .	. . .	0.15 minB
Mo	Product analysis	. . .	. . .	0.07 max	. . .	0.11 max	. . .	. . .	0.14 min
Ti	Heat analysis	. . .	. . .	. . .	. . .	0.05 max	. . .	. . .	. . .
Ti	Product analysis	. . .	. . .	. . .	. . .	. . .	. . .	. . .	. . .
(A) Class 8S3 nuts may be made of any of the listed steel analyses. Selection of steel analysis shall be the option of the manufacturer. (B) Nickel or molybdenum may be used.

Mechanical Requirements

5,9 Nuts
10,12 Nuts
8S, 8S3, 10S, 10S3, 10S Nuts
Proof Load

Nominal Diameter	Property Class
	5					5 (overtapped)					9
	Proof Load Stress, MPa	Hardness				Proof Load Stress, MPa	Hardness				Proof Load Stress, MPa	Hardness
		Rockwell		Vickers			Rockwell		Vickers			Rockwell		Vickers
		min	max	min	max		min	max	min	max		min	max	min	max
M1.6 to M2.5 M3 to M4	520	B70	C30	130	302	. . .	. . .	. . .	. . .	. . .	. . . 900	. . . B85	. . . C30	. . . 170	. . . 302
M5 and M6	580	B70	C30	130	302	465	B70	C30	130	302	915	B89	C30	188	302
M8 and M10	590	B70	C30	130	302	470	B70	C30	130	302	940	B89	C30	188	302
M12 to M16	610	B70	C30	130	302	490	B70	C30	130	302	950	B89	C30	188	302
M20 to M36	630	B78	C30	146	302	500	B78	C30	146	302	920	B89	C30	188	302
M42 to M100	630	B70	C30	128	302	500	B70	C30	128	302	920	B89	C30	188	302

Nominal Diameter	Property Class
	10					12					12 (Overtapped)
	Proof Load Stress, MPa	Hardness				Proof Load Stress, MPa	Hardness				Proof Load Stress, MPa	Hardness
		Rockwell		Vickers			Rockwell		Vickers			Rockwell		Vickers
		min	max	min	max		min	max	min	max		min	max	min	max
M1.6 to M2.5						. . .	. . .	. . .	. . .	. . .	. . .	. . .	. . .	. . .
M3 to M4	1040	C26	C36	272	353	1150	C26	C36	272	353
M5 and M6											920	C26	C36	272	353
M8 and M10						1160	C26	C36	272	353	930	C26	C36	272	353
M12 to M16	1050	C26	C36	272	353	1190	C26	C36	272	353	950	C26	C36	272	353
M20 to M36	1060	C26	C36	272	353	1200	C26	C36	272	353	960	C26	C36	272	353
M42 to M100	. . .	. . .	. . .	. . .	. . .	1200	C26	C36	272	353	960	C26	C36	272	353

Property Class
8S and 8S3					10S and 10S3					10 S (Overtapped)
Proof Load Stress, MPa	Hardness				Proof Load Stress, MPa	Hardness				Proof Load Stress, MPa	Hardness
	Rockwell		Vickers			Rockwell		Vickers			Rockwell		Vickers
	min	max	min	max		min	max	min	max		min	max	min	max

M12 to M361075B89C381883721245C26C382723721165C26C38272372

Nominal Diameter and Thread Pitch	Thread Stress Area, mm²	Property Class of Nut
Nominal Diameter and Thread Pitch	Thread Stress Area, mm²	5	5 (over- tapped)	9	10	12	12 (over- tapped)	8S and 8S3	10S and 10S3	10S (over- tapped)
M1.6 x 0.35	1.27	0.66	. . .	. . .	1.32	. . .	. . .	. . .	. . .	. . .
M2 x 0.4	2.07	1.08	. . .	. . .	2.15	. . .	. . .	. . .	. . .	. . .
M2.5 x 0.45	3.39	1.76	. . .	. . .	3.53	. . .	. . .	. . .	. . .	. . .
M3 x 0.5	5.03	2.62	. . .	4.53	5.23	. . .	. . .	. . .	. . .	. . .
M3.5 x 0.6	6.78	3.53	. . .	6.10	7.05	. . .	. . .	. . .	. . .	. . .
M4 x 0.7	8.78	4.57	. . .	7.90	9.13	. . .	. . .	. . .	. . .	. . .
M5 x 0.8	14.2	8.23	6.60	13.0	14.8	16.3	13.1	. . .	. . .	. . .
M6 x 1	20.1	11.7	9.35	18.4	20.9	23.1	18.5	. . .	. . .	. . .
M8 x 1.25	36.6	21.6	17.2	34.4	38.1	42.5	34.0	. . .	. . .	. . .
M10 x 1.5	58.0	34.2	27.3	54.5	60.3	67.3	53.9	. . .	. . .	. . .
M12 x 1.75	84.3	51.4	41.3	80.1	88.5	100	80.1	90.6	105	98.2
M14 x 2	115	70.2	56.4	109	121	137	109	124	143	134
M16 x 2	157	95.8	76.9	149	165	187	149	169	195	183
M20 x 2.5	245	154	123	225	260	294	235	263	305	285
M22 x 2.5	303	. . .	. . .	. . .	. . .	. . .	291	326	377	353
M24 x 3	353	222	177	325	374	424	339	379	439	411
M27 x 3	459	. . .	. . .	. . .	. . .	. . .	. . .	493	571	535
M30 x 3.5	561	353	281	516	595	673	539	603	698	654
M36 x 4	817	515	409	752	866	980	784	878	1020	952
M42 x 4.5	1120	706	560	1030	. . .	1340	1080	. . .	. . .	. . .
M48 x 5	1470	920	735	1350	. . .	1760	1410	. . .	. . .	. . .
M56 x 5.5	2030	1280	1020	1870	. . .	2440	1950	. . .	. . .	. . .
M64 x 6	2680	1690	1340	2470	. . .	3220	2570	. . .	. . .	. . .
M72 x 6	3460	2180	1730	3180	. . .	4150	3320	. . .	. . .	. . .
M80 x 6	4340	2730	2170	3990	. . .	5210	4170	. . .	. . .	. . .
M90 x 6	5590	3520	2800	5140	. . .	6710	5370	. . .	. . .	. . .
M100 x 6	6990	4400	3500	6430	. . .	8390	6710	. . .	. . .	. . .

Dimensions

Nut Diameter	Diametral Allowance, μm
M5	156
M6	200
M8	255
M10	310
M12	365
M14 and M16	420
M20 and M22	530
M24 and M27	640
M30	750
M36	860
M42	970
M48	1080
M56	1190
M64 to M100	1300

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.

Dimensional Standards

B18.2.4.1M Metric Hex Nuts
B18.2.4.6M Metric Heavy Hex Nuts

Certification

Testing Standards

E18 Test Methods for Rockwell Hardness of Metallic Materials
E21 Test Methods for Elevated Temperature Tension Tests of Metallic Materials
E709 Guide for Magnetic Particle Testing
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

Threading Specs

Supplementary Requirements

S1	Supplementary Lubricant Requirements for Nuts
S2	Lubricant Dye
S3	Lubricant Placement

Product

Precision Components

Contract Manufacturing

Fastener

Resources

materials

Technical