Always customer-oriented, and it's our ultimate target to be not only the most reliable, trustable and honest supplier, but also the partner for our customers for Hot Sale for China Heavy Hex Nut ASTM A193/A194m ASME SA194/SA194m Grade 2h Grade 8 Grade 8m GB6170 Gh20364, We welcome new and aged prospects from all walks of life to call us for upcoming business enterprise associations and attain mutual accomplishment! Always customer-oriented, and it's our ultimate target to be not only the most reliable, trustable and honest supplier, but also the partner for our customers for China Nut, Heavy Hex Nut, When you are keen on any of our goods following you view our product list, be sure to feel free to make contact with us for inquiries. You'll be able to send us emails and get in touch with us for consultation and we shall respond to you as soon as we're able to. If it's convenient, you could find out our address in our web site and come to our enterprise. or additional information of our products by yourself. We're generally ready to build lengthy and steady co-operation relations with any possible shoppers within the associated fields.

ASTM A563M 10S Metric Heavy Hex Nuts

Dimension Standard: ASME B18.2.4.6M

Metric Size: M12-M36

Other Available Material Grade:

ASTM A563M 5, 10, 12, 8S, 10S and so on

Finish: Plain, Black Oxide, Zinc Plated, Zinc Nickel Plated, Cadmium Plated, PTFE etc.

Packing: Bulk about 25 kgs each carton, 36 cartons each pallet

Advantage: High Quality, Competitive Price, Timely Delivery,Technical Support, Supply Test Reports

Please feel free to contact us for more details.

ASTM A563

The ASTM A563 specification covers the chemical and mechanical requirements for carbon and alloy steel nuts used on bolts, studs, and externally threaded fasteners. The charts below address over tapping allowances for hot-dip galvanized nuts, grade marking requirements, and mechanical requirements.

According to the A563 specification, “The requirements for any grade of nut may, at the supplier’s option, and with notice to the purchaser, be fulfilled by furnishing nuts of one of the stronger grades specified herein unless such a substitution is barred in the inquiry and purchase order”. This is important because some nut grades are not readily available in certain sizes and finishes. Additionally, the specification allows for the substitution of ASTM A194 grade 2H nuts in lieu of A563 grade DH nuts due to the lack of availability of grade DH nuts in nominal sizes 3/4″ and larger.

Hot-dip galvanized nuts must be tapped oversize to allow for the added thickness of the zinc on the threads of the externally threaded fastener. These allowances are addressed in the chart below.

Various nut styles exist and to some degree are determined by their grade. These styles include hex, heavy hex, square, jam, coupling, and sleeve.

A563 Grades

A	Carbon steel, hex or heavy hex
B	Carbon steel, hex or heavy hex
C	Carbon steel, quenched and tempered, heavy hex
D	Carbon steel, quenched and tempered, heavy hex
DH	Carbon steel, quenched and tempered, heavy hex
C3	Weathering steel, quenched and tempered, heavy hex
DH3	Weathering steel, quenched and tempered, heavy hex

A563 Mechanical Properties

Grade	Style	Size, in.	Proof Load, ksi		Hardness, HBN
			Plain	Galvanized
A	Hex	1/4 - 1-1/2	90	68	116 - 302
	Heavy Hex	1/4 - 4	100	75	116 - 302
B	Heavy Hex	1/4 - 1	133	100	121 - 302
	Heavy Hex	1-1/8 - 1-1/2	116	87	121 - 302
C / C3	Heavy Hex	1/4 - 4	144	144	143 - 352
D	Heavy Hex	1/4 - 4	150	150	248 - 352
DH / DH3	Heavy Hex	1/4 - 4	175	150	248 - 352
For UNC, 8UN, 6UN, and Coarse Pitch Threads

A563 Chemical Properties

Element	Grades O, A, B, C	D**	DH**
Carbon	0.55% max	0.55% max	0.20 - 0.55%
Manganese, min		0.30%	0.60%
Phosphorus, max	0.12%	0.04%	0.04%
Sulfur, max	0.15%*	0.05%	0.05%
* For grades O, A and B a sulfur content of 0.23% max is acceptable with the purchasers approval
** For grades D and DH a sulfur content of 0.05 - 0.15% is acceptable provided the manganese is 1.35% min

Element	Classes for Grade C3*							DH3
	A	B	C	D	E	F	N
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%		0.20 - 0.53%
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%		0.40% min
Phosphorus	0.040% max	0.06 - 0.12%	0.035% max	0.040% max	0.040% max	0.040% max	0.07 - 0.15%	0.046% max
Sulfur, max	0.050%	0.050%	0.040%	0.050%	0.040%	0.040%	0.050%	0.050%
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%	0.20 - 0.90%
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%	0.25 - 0.55%	0.20% min
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%	1.00% max	0.20% min**
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%	0.30 - 1.25%	0.45% min
Vanadium			0.020% min
Molybdenum		0.06% max		0.10% max				0.15% min**
Titanium				0.05% max
* Selection of a class shall be at the option of the manufacturer
** Nickel or Molybdenum may be used.

A563 Grade Identification Markings

Grade Identification Marking	Specification	Material	Nominal Size, In.	Proof Load Stress, ksi	Hardness Rockwell		See Note
					Min	Max
	ASTM A563 Grade O	Carbon Steel	1/4 - 1-1/2	69	B55	C32	2,3
	ASTM A563 Grade A	Carbon Steel	1/4 - 1-1/2	90	B68	C32	2,3
	ASTM A563 Grade B	Carbon Steel	1/4 - 1	120	B69	C32	2,3
			>1 - 1-1/2	105
	ASTM A563 Grade C	Carbon Steel, may be Quenched and Tempered	1/4 - 4	144	B78	C38	4
	ASTM A563 Grade C3	Atmospheric Corrosion Resistant Steel, may be Quenched and Tempered	1/4 - 4	144	B78	38	4,6
	ASTM A563 Grade D	Carbon Steel, may be Quenched and Tempered	1/4 - 4	150	B84	C38	5
	ASTM A563 Grade DH	Carbon Steel, Quenched and Tempered	1/4 - 4	175	C24	C38	5
	ASTM A563 Grade DH3	Atmospheric Corrosion Resistant Steel, Quenched and Tempered	1/4 - 4	175	C24	C38	4,6
NOTES:     1.In addition to the indicated grade marking, all grades, except A563 grades O, A, and B, must be marked for manufacturer identification.     2.Nuts are not required to be marked unless specified by the purchaser. When marked, the identification marking shall be the grade letter O, A, or B.     3.Properties shown are those of nonplated or noncoated coarse thread nuts.     4.Properties shown are those of coarse thread heavy hex nuts.     5.Properties shown are those of coarse thread heavy hex nuts. Other nuts styles and fine threads may apply.     6.The nut manufacturer, at his option, may add other markings to indicate the use of atmospheric corrosion resistant steel. Inch Fastener Standards. 7th ed. Cleveland: Industrial Fasteners Institute, 2003. n-80-n-81.

Thread Dimensions and Oversizing Allowances

For Nuts: Hot Dipped Galvanized per Specification F2329

Nominal Nut Size, in. and Pitch	Diametral Allowance, in.	Pitch Diameter
		Min	Max
0.250 - 20	0.016	0.2335	0.2384
0.312 - 18	0.017	0.2934	0.2987
0.375 - 16	0.017	0.3514	0.3571
0.437 - 14	0.018	0.4091	0.4152
0.500 - 13	0.018	0.4680	0.4745
0.562 - 12	0.020	0.5284	0.5352
0.625 - 11	0.020	0.5860	0.5932
0.750 - 10	0.020	0.7050	0.7127
0.875 - 9	0.022	0.8248	0.8330
1.000 - 8	0.024	0.9428	0.9516
1.125 - 8	0.024	1.0678	1.0768
1.125 - 7	0.024	1.0562	1.0656
1.250 - 8	0.024	1.1928	1.2020
1.250 - 7	0.024	1.1812	1.1908
1.375 - 8	0.027	1.3208	1.3301
1.375 - 6	0.027	1.2937	1.3041
1.500 - 8	0.027	1.4458	1.4553
1.500 - 6	0.027	1.4187	1.4292
1.750 - 5	0.050	1.6701	1.6817
2.000 - 4.5	0.050	1.9057	1.9181
2.250 - 4.5	0.050	2.1557	2.1683
2.500 - 4	0.050	2.3876	2.4011
2.750 - 4	0.050	2.6376	2.6513
3.000 - 4	0.050	2.8876	2.9015
3.250 - 4	0.050	3.1376	3.1517
3.500 - 4	0.050	3.3876	3.4019
3.750 - 4	0.050	3.6376	3.6521
4.000 - 4	0.050	3.8876	3.9023
Inch Fastener Standards. 7th ed. Cleveland: Industrial Fasteners Institute, 2003. B-173.

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Always customer-oriented, and it's our ultimate target to be not only the most reliable, trustable and honest supplier, but also the partner for our customers for Hot Sale for China Heavy Hex Nut ASTM A193/A194m ASME SA194/SA194m Grade 2h Grade 8 Grade 8m GB6170 Gh20364, We welcome new and aged prospects from all walks of life to call us for upcoming business enterprise associations and attain mutual accomplishment! Hot Sale for China Nut, Heavy Hex Nut, When you are keen on any of our goods following you view our product list, be sure to feel free to make contact with us for inquiries. You'll be able to send us emails and get in touch with us for consultation and we shall respond to you as soon as we're able to. If it's convenient, you could find out our address in our web site and come to our enterprise. or additional information of our products by yourself. We're generally ready to build lengthy and steady co-operation relations with any possible shoppers within the associated fields.