ASTM A193 Grade B8m Class 2 Bolts

ASME SA 193 B8m CL1 Studs, Hex Bolt and B8m nuts manufacturer in India

 

ASTM A193 Grade B8M Bolts
ASTM A193 Grade B8M Bolts
ASTM A193 B8M Hex Bolts
ASTM A193 B8M Hex Bolts
SA 193 Grade B8m Studs
SA 193 Grade B8m Studs

 

Manufacturer and supplier of ASTM A193 gr B8m Threaded Rod in Both Metric and Imperial (BSW, BSF, BA, UNC & UNF) Thread Forms in Mumbai

The ASTM A193 B8m Bolts specification covers both alloy steel as well as stainless steel bolting material. The bolting produced from ASTM A193 Grade B8m Bolts are meant to be used for applications in pressure vessels, valves, flanges, and fittings. Typically, the ASTM A193 B8m Class 1 Bolts is used for high temperature or high pressure service, as well as for other special purpose applications. Ferritic steels which fall under the ASTM A193 Grade B8m Class 2 Bolts category must be properly heat treated as, what best suits the high temperature features of each grade. Immediately after rolling or forging, the bolting ASTM A193 B8m Torque material has to be allowed to be cooled.


The cooling of the A193 B8M Equivalent bolts must be done to a temperature below its cooling transformation range. The chemical composition requirements for each alloy A193 Gr B8M Material have been presented in detail in the specification. The steel A193 B8M Bolts must not contain an unspecified element for ordered grade to an extent at which the steel Sa193 B8m bolts conforms to the requirements of another grade for which that particular element is a specified element. The tensile property and hardness property requirements of the A193 B8m Bolts have been discussed in the specification. The tensile strength property requirements of the A193 B8m Cl2 has been highlighted by a full size fasteners, wedge tensile testing. Click on the given link for the A193 B8M Torque Chart

The ASTM A193 B8M specification fasteners such as the A193 B8m Stud Bolts are heavily utilized in industries like petroleum and chemical. The ASTM A193 B8m fasteners often find use in applications that involve the construction industry. Although, the ASTM A193 Gr B8m material is frequently available in national coarse or also referred to as UNC thread pitches, if the ASTM A193 B8m Class 1 Torque are being used in traditional applications, threads are specified in the ASTM A193 B8m Pdf mention 8 threads per inch  or tpi for those fasteners which have a diameter above one inch.

Fasteners from ASTM A193 B8m Class 1 are similar to Grade B8. But instead of being manufactured from AISI 304 grade stainless steel, the A193 B8 Class 1 has been produced from AISI 316 stainless steel grade. The Type 316 ASTM A193 B8m Class 2 Torque stainless offers superior resistance to corrosion as compared to grade 304 stainless steel. This is due to the added molybdenum content in ASTM A193 B8m Cl2. The addition of molybdenum in the A193 Grade B8 also improves resistance to pitting in chloride ion solutions. The A193 B8 Cl2 bolts demonstrate an increased tensile strength even at high temperatures.

ASTM A193 B8m Class 2 316 grade stainless steel is known to be effective in acidic environments. The use of A193 B8m grade of stainless steel proves highly effective in protecting the fasteners against corrosion caused by acids such as  sulfuric, acetic, hydrochloric,  formic, and tartaric, as well as acid sulfates and alkaline chlorides. The additional strain hardening operation performed on the A193 B8 Class 2 fasteners not only increases its tensile strength, but also can demonstrate the A193 B8m Class 2 Properties reduced susceptibility to galling.

A193 B8m Class 1 fasteners have been carbide solution treated, on the other hand A193 B8m Class 2 fasteners have been both carbide solution treated as well as strain hardened. The work hardening that occurs during the manufacturing  process of A193 B8m Cl.2 fasteners tends to increases their tensile strength. Typically, Sa193 B8m Class 2 fasteners are differentiated by a line under the grade symbol. This line under the grade will appear either on the heads of bolts or the ends of threaded rods. In this case, A193 Gr B8m Class 2 fasteners have been marked as B8MSH with the grade symbol being underlined.

 

Specification List of ASTM A193 Grade B8M Bolts

Standard DIN, UNI, ISO, JIS, GB, IS, BS, ASME, ANSI, ASTM and all International Standards
Size M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M14, M16, M20, M24, M30, M36 to M160
Length 3 mm to 200 mm
Studs Threads: METRIC, BSW, BSF, UNC, UNF or as required
Standard:

ANSI - American National Standards Institute

  • ANSI B 18.2.4 2M
  • ANSI B 28.2.4 1M
  • Length are defined in ASME B16.5 standard
  • ASME B18.5

DIN: 931, 933, 934, 970

UTS - Unified Thread Standard : UNC, UNF, UNEF, UNS, NPT, NPTF

ISO - International Organization for Standardization : ISO 4032, ISO 4033, JIS standards

Bolts In Form of:

Hex, Square, Round, Threading as per Gauge Etc.

Head drive: Phillips, Slotted, Phillips/Slot, Six-Lobe, etc
Thread Metric Coarse
Test Certificate: Manufacturer Test Certificate as per EN 10204 / 3.1
finishing: Zinc (yellow, white, blue, black), black oxide, , Geometry, Dacroment, anodizing, nickel plated, plated zinc-nickel, Stainless steel: Passivated, Self-Colour, Hot Dip Galvanised (HDG), Bright Zinc Plated (BZP), Sherardized, Mechanically Applied coating and some special one like DACROMET
Production process M2-M24: Cold Froging, hot forging M24-M100, machining and CNC for Customized connecting element
Bolts types Hex Bolts, Flange Bolts, Hex Head Bolts, Lag Bolts, Square Bolts, Eye Bolts, U Bolts, T Bolts, Counter sunk Bolts etc.
Nut types Hex Head Nut, Eye Nut, Dome Nut, Wing Nut, T Nut, Panel Nut, Lock Nut, Coupling Nut, Square Nut, Acorn Nut etc.
Screws types Hex Head Cap Screws, Socket Set Screws, Anchor Screws, Blind Rivet, Socket Head Screws, Concrete Screws, Shoulder Screws, Panel Screws, Threaded Screws, Machine Screws etc.
Washers Types Machine Washers, Flat Washer, Star Washers, Sealing Washer, Lock Washer, Split Washer
Packing: IN BULK: canton, pallet, Small Boxs / carton / pallet, or customer request

Different ASTM A193 B8M Hex Bolts Types

Stainless Steel A193 B8m Bolts and Set Screws

Stainless Steel A193 B8m Bolts and Set Screws

ASTM A193 Grade B8m Socket Head Screws

ASTM A193 Grade B8m Socket Head Screws

Stainless Steel Grade B8m Nuts

Stainless Steel Grade B8m Nuts

ASTM A193 Gr B8m Washers

ASTM A193 Gr B8m Washers

316 Stainless Steel B8m Threaded Rod

316 Stainless Steel B8m Threaded Rod

ASTM A193 B8m Class 2 Machine Screws

ASTM A193 B8m Class 2 Machine Screws

SA 193 Grade B8m Class 2 Self Tapping Screws

SA 193 Grade B8m Class 2 Self Tapping Screws

ASTM A193 B8m Class 1 Self Drilling Screws

ASTM A193 B8m Class 1 Self Drilling Screws

 

We Stock and Supplies ASME SA193 B8M Nuts as per international standards, See A193 B8M Bolt Torque Chart and Yield Strength,

 

SA 193 Grade B8m Studs Price in India

Price list of ASTM A193 B8M Bolts manufacturer in India ASTM A193 B8m Nuts & Bolts Price in India (INR)
S.S. 316 HEX BOLTS, STAINLESS STEEL A193 GR. B8M, M16 X 80 MM LONG (FULL THREAD) WITH 1 HEAVY HEX NUT AND 2 P 225/set

Chemical Properties of A193 B8m Bolts

Element B7 B8M B8MM
Carbon 0.37 - 0.49% 0.08% max 0.08% max
Manganese 0.65 - 1.10% 2.00% max 2.00% max
Phosphorus, max 0.035% 0.045% 0.045%
Sulfur, max 0.040% 0.030% 0.030%
Silicon 0.15 - 0.35% 1.00% max 1.00% max
Chromium 0.75 - 1.20% 18.0 - 20.0% 16.0 - 18.0%
Nickel 8.0 - 11.0% 10.0 - 14.0%
Molybdenum 0.15 - 0.25% 2.00 - 3.00%

 

Compare A193 B8M Heavy Hex Bolts Price List, before buying A193 B8M Material

 

Mechanical Characteristics of ASTM A193 Gr B8m Washers

Grade Size Tensile ksi, min Yield, ksi, min Elong, %, min RA % min
B7 Up to 2-1/2 125 105 16 50
2-5/8 - 4 115 95 16 50
4-1/8 - 7 100 75 18 50
B8M Class 1 All 75 30 30 50
B8MM Class 1 All 75 30 30 50
B8M Class 2 Up to 3/4 125 100 12 35
7/8 - 1 115 80 15 35
1-1/8 - 1-1/4 105 65 20 35
1-3/8 - 1-1/2 100 50 28 45
B8MM Class 2 Up to 3/4 110 95 15 45
7/8 - 1 100 80 20 45
1-1/8 - 1-1/4 95 65 25 45
1-3/8 - 1-1/2 90 50 30 45

ASTM A193 B8M Bolts Stock List

ASTM A193 B8m Bolts Stainless Steel Bolts B8m ASTM Foundation Bolts
Stainless Steel A193 B8m Hex Bolts ASTM A193 B8m Cl2 T-Head Bolts
ASTM A193 Grade B8m Heavy Hex Bolts SA193 Gr B8m Class 1 Tap Bolts
Stainless Steel Grade B8m Flange Bolts ASTM A193 B8m Cl1 Machine Bolts
ASTM A193 Gr B8m Square Bolts A193 B8m Stainless T-Head Bolts
316 Stainless Steel B8m Eye Bolts ASTM A193 B8m Class 2 Nace Hex Bolts Din 933
ASTM A193 B8m Class 2 Hex Head Bolts Stainless Steel B8m ASTM Hex Bolts Din 931
SA 193 Grade B8m Class 2 Round Head Bolts ASTM A193 B8m Hex Bolts Din 934
ASTM A193 B8m Class 1 Plow Bolts Stainless Steel A193 B8m Hex Bolts Din 6914
Stainless Steel Bolts B8m ASTM Shoulder Bolts ASTM A193 Grade B8m Hex Bolts Din 912
ASTM A193 B8m Cl2 Carriage Bolts Stainless Steel Grade B8m Hex Bolts Din 601
SA193 Gr B8m Class 1 Elevator Bolts ASTM A193 Gr B8m Asme B18.2.1 Heavy Hex Bolts
ASTM A193 B8m Cl1 Step Bolts 316 Stainless Steel B8m Hexagon Flange Bolts Din6921
A193 B8m Stainless J Bolts ASTM A193 B8m Class 2 Eye Bolts Din 444
ASTM A193 B8m Class 2 Nace Hanger Bolts SA 193 Grade B8m Class 2 Eye Bolts Din 580
Stainless Steel B8m ASTM Draw Bolts ASTM A193 B8m Class 1 Eye Bolts Din 444 B
ASTM A193 B8m Anchor Bolts Stainless Steel Bolts B8m ASTM Eye Bolts Din 444 Lb
Stainless Steel A193 B8m Stove Bolts ASTM A193 B8m Cl2 Hex Head Bolts Din 933
ASTM A193 Grade B8m Lag Bolts SA193 Gr B8m Class 1 Hex Head Bolts Din 931
Stainless Steel Grade B8m 12 point Bolts ASTM A193 B8m Carriage Bolts Din 607
ASTM A193 Gr B8m Anchor Bolts A193 B8m Stainless Shoulder Bolts Din 7379
316 Stainless Steel B8m Structural Bolts ASTM A193 B8m Class 2 Nace Shoulder Bolts Din 9841
ASTM A193 B8m Class 2 Sex Bolts Stainless Steel B8m ASTM Carriage Bolts Din 603
SA 193 Grade B8m Class 2 Socket Bolts Stainless Steel Grade B8m Wedge Anchor Bolts
ASTM A193 B8m Class 1 Mushroom Head Square Neck Bolts Stainless Steel A193 B8m Elevator Bolts Din 15237
ASTM A193 B8m Cl1 Hex Head Socket Bolts Din 912 ASTM A193 Grade B8m Anchor Bolts Din 799

Stainless Steel A193 B8m Fasteners Sizes

SA193 Gr B8m Class 1 Bolts Type SIZE PROPERTY CLASS TENSILE STRENGTH STANDARD
ASTM A193 B8m Hex Head Bolts / Screws M4 to M80 10.9 1040N / mm2 min ISO 4017 (Full Thread), ISO 4014 (Half Thread)

 

A trusted supplier & exporter of ASME SA193 B8M Bolts buy many Petrochemical, Oil & Gas companies

 

ASTM A193 B8m Class 2 Bolt Dimensions

Hex Bolt Dimension

NOMINAL SIZE (D)
BODY DIAMETER
HEAD THICKNESS
ACROSS THE FLATS
ACROSS BOLTS CORNERS
D (MAX)
D (MIN)
H (MAX)
H (MIN)
F (MAX)
F (MIN)
C (MAX)
C (MIN)
m10
10.00
9.78
6.63
6.17
17.00
15.73
18.48
17.77
m12
12.00
11.73
7.76
4.24
19.00
17.73
20.78
20.03
m14
14.00
13.73
9.09
8.51
22.00
20.67
24.25
23.35
m16
16.00
15.73
10.32
9.68
24.00
23.67
27.71
26.75
m20
20.00
19.67
12.88
12.12
30.00
29.16
34.64
32.95
m24
24.00
23.67
15.44
14.56
36.00
35.00
41.57
39.55
m30
30.00
29.67
19.48
17.92
46.00
45.00
53.12
50.85
m36
36.00
35.61
23.38
21.63
55.00
53.80
63.51
60.79
m42
42.00
41.38
26.97
25.03
65.00
62.90
75.06
71.71
m48
48.00
47.38
31.07
28.93
75.00
72.60
86.60
82.76
m56
56.00
55.26
36.2
33.80
85.00
82.20
98.15
93.71
m64
64.00
63.26
41.32
38.68
95.00
91.80
109.70
104.65
m72
72.00
71.26
46.45
43.55
105.00
101.40
121.24
115.60
m80
80.00
79.26
51.58
48.42
115.00
111.00
132.72
126.54
m90
90.00
89.13
57.74
54.26
130.00
125.50
150.11
143.07
m100
90.00
99.13
63.9
60.10
145.00
140.00
167.43
159.60

Dimensions Table of A193 B8m Heavy Hex Bolts

Heavy Hex Bolts Dimensions

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
1.022
0.976
1.625
1.575
1.876
1.796
0.7
0.591
2.25
2.5
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 3/8
1.404
1.345
2.188
2.119
2.526
2.416
0.94
0.81
3
3.25
1 1/2
1.531
1.47
2.375
2.3
2.742
2.622
1.036
0.902
3.25
3.5
1 3/4
1.785
1.716
2.75
2.662
3.175
3.035
1.196
1.054
3.75
4
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
3
3.081
2.961
4.625
4.475
5.34
5.102
2.06
1.815
6.25
6.

Size Chart of A193 B8m Bolts

NOM., DIA. PITCH, mm DIAMETER, mm DIAMETER, inch NUT, Size
M10 1.5 10 0.3937 17
M12 1.75 12 0.4724 19
M14 2 14 0.5512 22
M16 2 16 0.6299 24
M18 2.5 18 0.7087 27
M20 2.5 20 0.7874 30
M22 2.5 22 0.8661 32
M24 3 24 0.9449 36
M27 3 27 1.063 41
M30 3.5 30 1.1811 46
M33 3.5 33 1.2992 50
M36 4 36 1.4173 55
M39 4 39 1.5354 60
M42 4.5 42 1.6535 65
M45 4.5 45 1.7717 70
M48 5 48 1.8898 75
M52 5 52 2.0472 80
M56 5.5 56 2.2047 85
M60 5.5 60 2.3622 90
M64 6 64 2.5197 95
M68 6 68 2.6772 100
M72 6 72 2.8346 105
M76 6 76 2.9921 110
M80 6 80 3.1496 115
M85 6 85 3.3464 120
M90 6 90 3.5433 130
M100 6 100 3.937 145
M110 6 110 4.3307 155
M125 6 125 4.9212 180
M140 6 140 5.5118 200
M160 6 160 6.2992 230

Torque Chart of ASME SA193 B8m Bolts

BOLT, DIA
Torque FT-LBS
30% Initial, Torque
70%, Torque
100% Final, Torque
1/2
16
36
52
9/16
23
53
75
5/8
31
73
104
3/4
55
129
184
7/8
71
166
237
1
107
249
356
1.1/8
127
297
424
1.1/4
179
417
596
1.3/8
186
435
622
1.1/2
246
574
821
1.9/16
168
392
560
1.5/8
191
445
636
1.3/4
240
561
801
1.7/8
298
696
994
2
366
853
1219
2.1/4
529
1234
1762
2.1/2
733
1709
2442
2.3/4
986
2300
3285
3
1289
3008
4297

 

Know the Delivery strength of your supplier first

France, Europe, Thailand, Qatar ASTM a193 b8M hex bolt
Indonesia, Philippines, Belgium, Dammam -KSA ASTM A193 B8M Class2 Thread rod Stud Bolt with 2 Nut
USA, Bangladesh, Finland, Malaysia DIN912 ASTM A193 B8M Allen Cap Head or Hex Socket Head Bolt
Germany, Thailand, Malaysia, Czechia M26 hex head bolt m8 hex bolt colored b8 b8m hex bolt
South Africa, Singapore, Singapore, Bahrain ASTM A193 Grade B8m Full Thread Stud Bolts And Nuts For Pipe Flange
Saudi Arabia (KSA), Kuwait, Brazil, South Africa M30 M36 M38 astm a193 grade b8m bolts
Malaysia, Hong Kong, UAE, Oman ASTM A193 B8 B8m CL2 Threaded Rod
Australia, UK, Nigeria, Philippines B8m standard hex head bolts stud bolt M3*18
Turkey, Norway, Malaysia, United Arab Emirates (UAE) ASTM A193 B8M Rectangle Square Head Bolts
Italy, Iran, Singapore, Chile ASTM A193 B8m Stud Bolt Full Thread
Malaysia, Russia, Dubai, Netherlands m8x50 torque limiting astm a193 b8m bolt
Europe, Malaysia, UAE, United Kingdom -UK 8mm 10mm stud bolt astm a193 b8m
South Korea, NY 12203 (USA), Malaysia, Singapore Astm a193 b8m hex bolt

 

Recommended Nuts & Washers of A193 B8M Material

Bolting Grade Nut Grade Washer Grade
ASTM A193 Grade B8M, B8MA, B8M2, B8M3 ASTM A194 Grade 8M, 8MA SS 316

 

Raw Material of ASTM A193 Gr B8m Studs

Grade Tensile Class Raw Material Description
B8M Class 1 AISI 316 Stainless Steel, Carbide Solution Treated
B8M Class 2 AISI 316 Stainless Steel, Carbide Solution Treated and Strain Hardened

 

Temperature Range of SA193 B8m Bolts

SPEC
GRADE
TEMPERATURE deg F (deg C)
650
700
750
800
850
900
950
1000
1050
1100
343
371
399
427
454
482
510
538
566
593
ASTM A193
B6
21.2
21.2
21.2
19.5
15.6
12
ASTM A193
B7(*)
ASTM A193
B7M
25
25
23.6
21
17
12.5
8.5
4.5
ASTM A193
(*)
20
20
20
18.5
16.2
12.5
8.5
4.5
ASTM A193
B8-CL1
11.2
11
10.8
10.5
10.3
10.1
9.9
ASTM A193
B8-CL2
25
ASTM A193
(* *)
25
25
25
25
23.5
20.5
16
11
6.3
2.8
ASTM A193
B16
ASTM A320
L7
25
25
BS
B17B
20
19.8
19.8
19.8
19.7
19.7
19.6
19.4
19.3
16.6
ASTM 453
660
20.2
20.1
20
19.9
19.9
19.9
19.8
19.8

 

Marking of ASME SA193 B8M Bolt

Class Manufacturer's Mark Grade Symbol
Class 1 Raaj Sagar B8M
Class 1B B8Y or B8MN
Class 1D B95
Class 2 B8MSH

 

ASTM A193 B8M Bolts Weight Chart

MM THREADS AS PER IS 1363/67
APPROXIMATE WEIGHT IN KGS FOR 100 NOS
LENGTH DIAMETER
M 5 M 6 M 8 M 10 M 12 M 14 M 16 M 18 M 20 M 22
16 mm 0.448 0.743 1.590 3.211
20 mm 0.598 0.812 1.711 3.411 4.892
25 mm 0.660 0.897 1.871 3.660 5.252 8.170
30 mm 0.737 1.010 2.070 3.912 5.574 9.690 10.707 18.657
35 mm 0.804 1.120 2.271 4.223 5.974 10.000 11.416 16.026 19.608
40 mm 0.881 1.230 2.470 4.533 6.410 10.288 12.107 16.667 20.747
45 mm 0.958 1.340 2.671 4.840 6.859 10.504 12.821 17.241 21.739
50 mm 1.030 1.450 2.870 5.155 7.299 11.261 13.624 17.857 22.727 28.409
55 mm 1.560 3.071 5.464 7.740 11.628 14.409 18.868 23.810 30.120
60 mm 1.670 3.270 5.774 8.183 12.255 15.244 20.000 25.126 32.051
65 mm 1.781 3.472 6.083 8.621 12.626 16.026 21.008 26.455 34.014
70 mm 1.890 3.671 6.394 9.058 12.987 16.835 22.124 27.778 35.461
75 mm 2.000 3.873 6.702 9.506 13.228 17.606 23.256 29.070 39.063
80 mm 2.111 4.072 7.013 10.000 13.889 18.248 24.510 30.303 40.000
90 mm 4.472 7.634 10.917 14.925 19.841 26.042 33.113 41.667
100 mm 4.873 8.251 11.820 16.340 21.459 27.778 35.714 46.296
110 mm 8.881 12.723 17.730 23.041 31.250 38.168 47.170
120 mm 9.506 13.624 18.797 24.631 32.895 40.984 50.000
130 mm 10.101 14.535 20.000 26.316 34.722 43.478 52.632
140 mm 10.707 15.432 20.833 27.933 35.461 46.296 55.556
150 mm 11.312 16.340 22.222 29.412 37.594 48.544 58.824
160 mm 11.905 17.241 24.272 31.056 40.984 50.505 61.728
170 mm 12.500 18.116 32.680 53.191 64.935
180 mm 13.123 19.011 26.882 34.247 55.556 67.568
190 mm 13.736 19.920 35.971 58.140 70.423
200 mm 14.327 20.833 29.586 37.594 49.020 60.976 73.529
220 mm 15.528 22.624 40.650 65.789 79.365
240 mm 16.722 24.510 43.860 71.429 84.746
250 mm 17.301 25.381 45.455 74.627 87.719
260 mm 17.921 26.316 47.170 76.923 90.909
280 mm 19.157 28.090 50.505 81.967 98.039
300 mm 20.325 29.940 53.763 87.719 104.167
320 mm 31.646 56.818 92.593
340 mm 33.557 60.241 98.039
360 mm 35.211 63.291 104.167
380 mm 37.037 66.667 108.696
400 mm 39.063 69.444 113.636

 

ASTM A193 B8M Nuts Weight Chart

Size Finished Hex Heavy Hex Finished Jam Heavy Hex Jam Square Heavy Square
1/2″ Nut 3.75 6.54 2.62 4.00 5.78 7.87
5/8″ Nut 7.33 11.9 4.93 6.96 10.8 14.3
3/4″ Nut 11.9 19.3 7.70 11.0 15.4 23.5
7/8″ Nut 19.0 29.7 12.0 16.7 24.5 36.2
1″ Nut 28.3 42.5 17.6 23.5 36.3 51.5
11/8″ Nut 40.3 59.2 24.7 32.4 52.5 72.4
11/4″ Nut 54.3 78.6 36.1 45.8 70.6 95.5
13/8″ Nut 73.0 102 47.9 59.3 94.5 125.0
11/2″ Nut 94.3 131 60.9 74.8 122 161
15/8″ Nut 162 91.6
13/4″ Nut 151 204 100 114
17/8″ Nut 241 134
2″ Nut 224 299 140 165
21/4″ Nut 419 227
21/2″ Nut 564 332
23/4″ Nut 738 429
3″ Nut 950 545
31/4″ Nut 1194 651
31/2″ Nut 1526 851
33/4″ Nut 1812 1005
4″ Nut 2180 1200

 

Threads Per Inch and Tensile Stress Areas

Nominal Size, inch. Coarse Threads - UNC Fine Threads - UNF 8 Thread Series - 8UN
Threads / inch Stress AreaA, in2 Threads / inch Stress AreaA, in2 Threads / inch Stress AreaA, in2
1/4 20 0.0318 28 0.0364 -- --
5/16 18 0.0524 24 0.0580 -- --
3/18 16 0.0775 24 0.0878 -- --
7/16 14 0.1063 20 0.1187
1/2 13 0.1419 20 0.1599
9/16 12 0.1820 18 0.2030
5/8 11 0.2260 18 0.2560
3/4 10 0.3340 16 0.3730
7/8 9 0.4620 14 0.5090
1 8 0.6060 12 0.6630
1 1/8 7 0.7630 12 0.8560 8 0.790
1 1/4 7 0.9690 12 1.0730 8 1.000
1 3/8 6 1.1550 12 1.3150 8 1.233
1 1/2 6 1.4050 12 1.5810 8 1.49