ASTM A563 Hex Nuts
Specification
CHEMICAL & MECHANICAL COMPOSITION
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Detailed Information
The grades A, B, C and D along with the ASTM A563 Grade Dh Nuts are all made up of carbon steel. The grades A and B are hex or heavy hex nuts where all the other grades are heavy hex nuts. The Heavy Hex Nuts ASTM A563 range from ¼ inches to 4 inches depending on the grades. The nuts ranging from ¼ inches to 1 ½ inches fall under the grade A and B mostly. The Nuts ASTM A563 Grade A has hex nuts ranging up to 1 ½ inches and heavy hex nuts ranging up to 4 inches. The materials used have carbon, manganese, phosphorus and sulfur in the composition. The ASTM A563 Nut Dimensions differ with the grade and the strength varies as well. The hardness of the nuts range from 116 HBN for grade A and up to 352 HBN for DH and DH3 grades. The ASTM A563 Coupling Nut is a special type that can connect two bolt ends together. The proof load of the grades varies as well. The grade A plain nuts have 90ksi proof load and galvanized ones have 68ksi. The ASTM A563 Heavy Hex Nut of grades DH and DH3 have proof loads of 175ksi for plain and 150ksi for galvanized nuts. Due to the high tensile and yield strengths of these nuts, the Heavy Hex Jam Nut ASTM A563 types are used in high stress systems such as transportation and construction.
ASTM A563 Nut Thickness varies with the eight different grades that are covered by this ASTM A563 specification. There are eight grades namely, the A, B, C, D, DH, C3 and DH3. Each grade has different type of material and heat treatment. The ASTM A563 Dh Heavy Hex Nuts are made up of carbon steel and can be quenched and tempered.
ASTM Specification of A563 Nuts
- ASTM A193 / A193M – 16 : Standard Specification for High-Temperature Bolting, with Expansion Coefficients Comparable to Austenitic Stainless Steels
- ASTM A1082 / A1082M – 16 : Standard Specification for High Strength Precipitation Hardening and Duplex Stainless Steel Bolting for Special Purpose Applications
- ASTM F2281 : Standard Specification for Stainless Steel and Nickel Alloy Bolts, Hex Cap Screws, and Studs, for Heat Resistance and High Temperature Applications Designation
- ASTM A1014 / A1014M – 16 : Standard Specification for Precipitation-Hardening Bolting (UNS N07718) for High Temperature Service
- ASTM A962 / A962M – 16a : Standard Specification for Common Requirements for Bolting Intended for Use at Any Temperature from Cryogenic to the Creep Range
ASTM A638 / A638M : Standard Specification for Precipitation Hardening Iron Base Superalloy Bars, Forgings, and Forging Stock for High-Temperature Service
ASTM A563 Bolt Chemical Compatibility Chart
Element, max except as shown |
Alloy Group 1, Type 304 |
Alloy Group 2, Type 316 |
Carbon |
0.08% |
0.08% |
Manganese |
2.00% |
2.00% |
Phosphorus |
0.045% |
0.045% |
Sulfur |
0.030% |
0.030% |
Silicon |
1.00% |
1.00% |
Chromium |
18.0 to 20.0% |
16.0 to 18.0% |
Nickel |
8.0 to 10.5% |
10.0 to 14.0% |
Copper |
1.00% |
|
Molybdenum |
2.00 to 3.00% |
Mechanical Analysis of ASTM A563 Lock Nut
Alloy Group |
Condition |
Marking |
Diameter Range |
Tensile, ksi |
Yield, ksi min |
Rockwell Hardness |
1 |
AF |
A563A |
1/4 to 1-1/2 |
65 to 85 |
20 |
B85 max |
A |
A563B |
1/4 to 1-1/2 |
75 to 100 |
30 |
B65 to 95 |
|
CW1 |
A563C |
1/4 to 5/8 |
100 to 150 |
65 |
B95 to C32 |
|
CW2 |
A563D |
3/4 to 1-1/2 |
85 to 140 |
45 |
B80 to C32 |
|
2 |
AF |
A563E |
1/4 to 1-1/2 |
65 to 85 |
20 |
B85 max |
A |
A563F |
1/4 to 1-1/2 |
75 to 100 |
30 |
B65 to 95 |
|
CW1 |
A563G |
1/4 to 5/8 |
100 to 150 |
65 |
B95 to C32 |
|
CW2 |
A563H |
3/4 to 1-1/2 |
85 to 140 |
45 |
B80 to C32 |
Equivalent of Nuts ASTM A563 Grade A:
Alloy Group |
Alloy Designation |
Alloy Type |
1 |
303, 304, 304L, 305, 384, XM1, 18-9LW, 302HQ, 303Se |
Austenitic |
2 |
316, 316L |
Austenitic |
3 |
321, 347 |
Austenitic |
4 |
430, 430F |
Ferritic |
5 |
410, 416, 416Se |
Martensitic |
6 |
431 |
Martensitic |
7 |
630 (17-4) |
Precipitation Hardening |
Dimensional Chart of ASTM A563 Heavy Hex Nuts
Diameter (D) |
Body Diameter (D) |
Across the Flats (F) |
Across the Corners © |
Head Height (H) |
Thread Lengths (T) |
|||||
MAX |
MIN |
MAX |
MIN |
MAX |
MIN |
MAX |
MIN |
<6” |
>6” |
|
1/2 |
0.515 |
0.482 |
0.875 |
0.85 |
1.01 |
0.969 |
0.364 |
0.302 |
1.25 |
1.5 |
5/8 |
0.642 |
0.605 |
1.062 |
1.031 |
1.227 |
1.175 |
0.444 |
0.378 |
1.5 |
1.75 |
3/4 |
0.768 |
0.729 |
1.25 |
1.212 |
1.443 |
1.383 |
0.524 |
0.455 |
1.75 |
2 |
7/8 |
0.895 |
0.852 |
1.438 |
1.394 |
1.66 |
1.589 |
0.604 |
0.531 |
2 |
2.25 |
1 1/8 |
1.149 |
1.098 |
1.812 |
1.756 |
2.093 |
2.002 |
0.78 |
0.658 |
2.5 |
2.75 |
1 1/4 |
1.277 |
1.223 |
2 |
1.938 |
2.309 |
2.209 |
0.876 |
0.749 |
2.75 |
3 |
1 1/2 |
1.531 |
1.47 |
2.375 |
2.3 |
2.742 |
2.622 |
1.036 |
0.902 |
3.25 |
3.5 |
2 |
2.039 |
1.964 |
3.125 |
3.025 |
3.608 |
3.449 |
1.388 |
1.175 |
4.25 |
4.5 |
2 1/4 |
2.305 |
2.214 |
3.5 |
3.388 |
4.041 |
3.862 |
1.548 |
1.327 |
4.75 |
5 |
2 1/2 |
2.559 |
2.461 |
3.875 |
3.75 |
4.474 |
4.275 |
1.708 |
1.479 |
5.25 |
5.5 |
2 3/4 |
2.827 |
2.711 |
4.25 |
4.112 |
4.907 |
4.688 |
1.869 |
1.632 |
5.75 |
6 |
Application of ASTM A563 Lock Nut
- Power Generation
- Petrochemicals
- Gas Processing
- Pharmaceuticals
- Sea Water Equipment