SA 320 Grade B8M Hex Bolt manufacturer in India

ASTM A320 B8M bolts manufacturer in India

Leading supplier of ASTM A320 GR B8M socket head cap screws and A320 B8M eye bolt with extensive inventory in Mumbai

ASTM A320 B8M bolts

ASTM A320 B8M bolts

SA 320 Grade B8M hex bolt

SA 320 Grade B8M hex bolt

A320 GR B8M socket head cap screws

A320 GR B8M socket head cap screws

SA 320 GR B8M hex cap screws and SA 320 B8M machine bolts for Sour Service as per ISO 15156, NACE MR0175 specification

Table of Content

ASTM A320 B8M bolts specifications

ASTM A320 B8M bolts specifications

Dimensions Length Size Forms
ANSI B18.2.1, B18.3, DINΒ 931/ 933 12 -1200MM M10 – M110 Nuts, Bolts, Washers, Screw
Head Drive Iso Standard Head type: Coating
Phillips/Slot, Phillips, Slotted, Six-Lobe ISO 4033, ISO 4032 Hex, round, flat, hex flange, square PTFE, zinc plated, black phosphate, hot dip galvanized
International Standard Thread Diameter Application
BS, UNI, ANSI, ISO, IS, JIS, GB, ASME, ASTM DIN BSW, METRIC, UNF, UNC, BSF, custom 1/4β€³ – 2β€³ chemical and petrochemical plants, and power generation
Check A320 GR B8M socket head bolts and ASTM A 320 GR B8M heavy hex head bolt thread type and metric sizes

Types of SA 320 Grade B8M bolt

A320 B8M eye bolt

A320 B8M eye bolt

  • Sizes: M10 – M110
  • Length: 12 -1200MM

SA 320 GR B8M hex cap screws

SA 320 GR B8M hex cap screws

  • Thread type : Metric, Metric course, UNF, BA, BSF, UNC, UN8, BSW

SA 320 B8M machine bolts

SA 320 B8M machine bolts

  • Temperature range: -200-750Β°C
  • Diameter: 1/4″ – 2″

A320 GR B8M socket head bolts

A320 GR B8M socket head bolts

  • Coatings: zinc plating, hot dip galvanising, PTFE
  • Yield strength(ksi [MPa]): 30 [205]

ASTM A 320 GR B8M heavy hex head bolt

ASTM A 320 GR B8M heavy hex head bolt

  • Tensile strength(ksi [MPa]): 75 [515]
  • Head type: Hex, round, hex flange, flat, square

ASTM A320 Grade B8M heavy hex bolts

ASTM A320 Grade B8M heavy hex bolts

  • Hardness: 223 HBW or 96 HRC
  • Equivalent to: AISI 316 stainless steel
ASTM A320 Grade B8M heavy hex bolts and SA320 B8M square bolts for corrosion, wear, stress & fatigue conditions

Chemical composition of ASTM A320 B8M hex bolts

Elements Composition, % A
S31600(316)
Sulfur, maximum 0.030, maximum
Silicon 1.00
Nickel 10.0 – 14.0
Carbon, maximum 0.08
Manganese 2.00
Phosphorus, maximum 0.045
Chromium 16.0 – 18.0
Molybdenum 2.00 – 3.00

ASTM A320 GR B8M socket head cap screws mechanical properties

Tensile Strength, minimum, ksi [MPa] Elongation in 2 inch or 50milimeter, minimum, % Yield Strength minimum, ksi [MPa] (0.2% offset) Reduction of Area, minimum, % Hardness, maximum
HRC HBW
75 [515] 30 30 [205] 50 96 223
Bolt Grade Nuts Washers
B8M Class 1 A194 Grade 8M SS316

SA 320 GR B8M hex cap screws impact test requirements

Size of Specimen, milimeter Test Temperature minimum impact value required for average of each set of three specimens, ft-lbf [J] minimum impact value permitted for one specimen only of a set, ft-lbf [J]
Β°F Β°C
10 X 10 20 [27] 15 [20]
10 X 7.5 16 [22] 12 [16]

SA320 B8M hex bolt grade material

A320 B8M Class 1 AISI 316, carbide solution treated

A320 GR B8M washer sizes

Sizes Outer Dia in Inch Inner Dia in Inch Thickness in Inch
3/16 9/16 1/4 3/64
1/4 3/4 5/16 1/16
5/16 7/8 3/8 5/64
3/8 1 7/16 5/64
7/16 1-1/4 1/2 5/64
1/2 1-3/8 9/16 7/64
9/16 1-1/2 5/8 7/64
5/8 1-3/4 11/16 9/64
3/4 2 13/16 5/32
7/8 2-1/4 15/16 1/64
1 2-1/2 1-1/16 11/64
1-1/8 2-3/4 1-1/4 11/64
1-1/4 3 1-3/8 11/64
1-3/8 3-1/4 1-1/2 3/16
1-1/2 3-1/2 1-5/8 3/16
1-5/8 3-3/4 1-3/4 3/16
1-3/4 4 1-7/8 3/16
2 4-1/2 2-1/8 3/16
2-1/2 4-1/2 2-5/8 3/16
3 5-1/2 3-1/8 9/32

A320 GRB8M flange bolts torque chart

Size range in Inch Clamp Load in lbs TPI Proof Load in lbs Torque Tightening (ft lbs)
Galv + Waxed Galv Plain
1⁄4 2,513 20 3,350 5 13 10
5⁄16 4,125 18 5,500 11 27 21
3⁄8 6,113 16 8,150 19 48 38
7⁄16 8,363 14 11,150 30 76 61
1⁄2 11,175 13 14,900 47 116 93
9⁄16 14,325 12 19,100 67 168 134
5⁄8 17,813 11 23,750 93 232 186
3⁄4 26,288 10 35,050 164 411 329
7⁄8 36,375 9 48,500 265 663 530
1 47,738 8 63,650 398 995 796
11⁄8 60,075 7 80,100 563 1,408 1,126
11⁄8 62,201 8 82,934 583 1,458 1,166
11⁄4 76,313 7 101,750 795 1,987 1,590
11⁄4 78,754 8 105,006 820 2,051 1,641
13⁄8 90,975 6 121,300 1,042 2,606 2,085
13⁄8 97,119 8 129,492 1,113 2,782 2,226
11⁄2 110,663 6 147,550 1,383 3,458 2,767
11⁄2 117,515 8 156,687 1,469 3,672 2,938
13⁄4 149,625 5 199,500 2,182 5,455 4,364
13⁄4 163,800 8 218,400 – – 4,778
2 196,875 41⁄2 262,500 3,281 8,203 6,563
2 218,138 8 290,850 – – 7,271
21⁄4 255,938 41⁄2 341,250 4,799 11,997 9,598
21⁄4 280,351 8 373,801 – – 10,513
21⁄2 315,000 4 420,000 6,563 16,406 13,125
21⁄2 349,650 8 466,200 – – 14,569
23⁄4 351,263 4 468,500 8,050 20,124 16,100
23⁄4 386,888 8 515,851 – – 17,732
3 425,363 4 567,150 10,634 26,585 21,268
3 463,838 8 618,451 – – 23,192
31⁄4 505,875 4 674,500 13,701 34,252 27,402
31⁄4 547,913 8 730,550 – – 29,679
31⁄2 593,513 4 791,350 17,311 43,277 34,622
31⁄2 638,401 8 851,201 – – 37,240
33⁄4 688275 4 917700 21,509 53,771 43,017
33⁄4 736,725 8 982,300 – – 46,045
4 789450 4 1052600 26,315 65,788 52,630
4 841,463 8 1,121,950 – – 56,098

A320 B8M SS 316 bolt standard

Stud Bolt Set Screws / Hex Bolt Socket Cap screws Hex Nuts
BS4882 DIN 931 DIN 912 DIN 934
DIN 976 DIN 933 DIN 6912 BS 1768
ISO 4017 BS 2470 ISO 4033
BS 1768 DIN 7984 BS 1769
UNI 5731 ANSI B18.3 BS 1083
UNI 5739 ISO 4762 BS 3692
ISO 4014 UNI 5931 ISO 4032
BS 1769 BS 4168 ANSI B18.2.2
BS 3692
ANSI B18.2.1

Weight chart of ASTM A 320 Grade B8M heavy hex head bolt

Pipe Sizes Thread metric Size U-Bolt Clamp Thread Length (K) S (Max) Maximum Load
up to 3400C		 Item Weight
Nominal Sizes Outside Dia (A)
NB milimeter milimeter milimeter kN kg
15 21.3 M8 15NB 25 7 0.68 0.07
20 26.7 M8 20NB 25 10 0.54 0.08
25 33.4 M8 25NB 25 10 0.43 0.08
32 42.2 M8 32NB 25 10 0.34 0.09
40 48.3 M10 40NB 35 16 0.60 0.18
50 60.3 M10 50NB 35 16 0.48 0.20
65 76.1 M12 65NB 45 19 0.70 0.34
80 88.9 M16 80NB 50 19 1.50 0.70
100 114.3 M16 100NB 50 19 1.17 0.81
125 141.3 M16 125NB 50 19 0.94 0.91
150 168.3 M20 150NB 55 19 1.52 1.69
175 193.7 M20 175NB 55 19 1.32 1.85
200 219.1 M20 200NB 55 19 1.17 2.07
225 244.5 M20 225NB 60 19 1.05 2.18
250 273.0 M20 250NB 60 22 0.94 2.43
300 323.9 M20 300NB 60 22 0.79 2.75
350 355.6 M24 350NB 65 22 1.25 4.38
400 406.4 M24 400NB 65 22 1.09 4.92
450 457.2 M24 450NB 70 22 0.97 5.32
500 508.0 M24 500NB 70 22 0.87 5.87
550 559.0 M24 550NB 70 22 0.73 6.34
600 609.6 M24 600NB 70 22 0.67 6.81
650 660.4 M24 650NB 70 24 0.62 7.20
700 711.2 M30 700NB 80 24 1.18 12.49
750 762 M30 750NB 80 24 1.10 13.22
800 812.8 M30 800NB 80 24 1.04 13.95
850 863.6 M30 850NB 80 24 0.98 14.68
900 914.4 M30 900NB 80 24 0.93 15.41
1000 1016.0 M30 1000NB 80 24 1.56 24.94

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