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Govt Certified ASTM A193 Stainless Steel Fasteners manufacturer in India, check Stainless Steel Bolt Grades and weight chart

Stainless steel Fasteners are highly alloyed iron-based family of metals with a minimum content of element chromium ranging between 10% to 11%. Unlike iron, it is an alloy that is resistant to rust, due to the inclusion of chromium. The chemical make-up of different Stainless Steel Bolts and Nuts varies with the change in the content of elements such as copper, nitrogen, aluminium, titanium, nickel, silicon, sulfur, selenium, niobium, and molybdenum. The addition of minerals in a proportion is what imparts the alloy its mechanical properties. For instance, SS Fasteners that have a chromium content of more than 12% tend to react with the oxygen present in the air and forms a self-repairing layer on its surface, thus effectively shielding the component, for example, SS bolts and nuts, from getting worn out by oxidation.

The five classes of Stainless Steel Bolt Grades are classified based on their crystalline structure -

  • Austenitic class
  • Martensitic class
  • Ferritic class
  • Precipitation hardening class
  • Duplex class

A difference in their crystalline structure in conjunction with its properties makes it an alloy that is strong, tough, and corrosion-resistant, especially if compared to low alloy steels or regular carbon steels. Generally, classes like austenitic type prove to be ideal in the fashioning of Stainless Steel Threaded Fasteners & automotive nut bolt. It is because these alloy classes are highly ductile or pliable and can be formed easily by various operations. While martensitic and ferritic steels have good creep strength and hardness properties.

Furthermore, after being furnished with different heat treatment processes, these Stainless Steel Bolt Nut could be used at an elevated temperature. Their use is not limited to only ambient or high-temperature settings, but also in cryogenic applications. These SS Fasteners can be Coated, Coloured or Polished.

Weldability is a property that differs to a certain degree in each Stainless Steel Bolt. Some alloys may have good weldability, while others may not be favourable to weld. In the instance of the former alloys, the welded area may be susceptible to grain boundary precipitates and is more likely to undergo corrosion. To prevent this from occurring, the chemistry for an austenitic alloy grade; for instance, SS 304 Bolt is modified by lowering the content of carbon in the metal. This new grade has the letter L added to its name. So the new metal grade would read alloy 304L, where the letter L is indicative of lower carbon content. However, the modified chemistry does not meet the mechanical properties as the original alloy. Therefore, when the metal is alloyed, nitrogen is combined to its chemistry, thus giving the modified grade 304L metric stainless steel fasteners mechanical properties practically similar to that of the parent SS 304 Fasteners.

In heat-resisting steel grades such as alloy 321 Stainless Steel Nut Bolt, the metal would have stabilizers in the place of either titanium or columbium added to its chemistry. These stabilizers are why the fore mentioned fastener is well suited for use at elevated temperatures. So you can call them as high strength stainless steel bolts or high tensile stainless steel fasteners. Don't forget to ask MTC from your SS Nut Bolt manufacturers in Mumbai, it will help you to choose genuine material for fixing.

Stainless Steel Bolts and Nuts

Stainless Steel Bolts and Nuts

Self-Drilling Stainless Steel Fasteners

Self-Drilling Stainless Steel Fasteners

Stainless Steel Fasteners

Stainless Steel Fasteners

Passivated Stainless Steel Fasteners

Passivated Stainless Steel Fasteners

High strength stainless steel bolts

High strength stainless steel bolts

Stainless Steel Toggle Bolts

Stainless Steel Toggle Bolts

Hot dipped and galvanized Stainless Steel Lag Bolts, Toggle Bolt & SS Nut Bolt manufacturer in India, Check online SS Fasteners Price List Ex Mumbai

Stainless Steel Bolts and Nuts
Stainless Steel Fasteners Price List India

Check standard specification of Stainless Steel J Bolts & Plow Bolts, Buy Coated & Polished SS Fasteners at lowest price in Mumbai, India

Material Price in India
Stainless Steel Split Washer (Box of 100pcs) INR 99/Box
M12 Stainless Steel Washer INR 3/pcs
STAINLESS STEEL STUD WITH NUTS, SIZE: 7/8 X 175 INR 1,546/pcs
SS Nuts and Bolts standard specification

High Tensile Assorted Stainless Steel Bolt Nut in M4- M30 sizes and DIN 912 /933 /931 / ISO 4762/ 4017/ 4014 standard

ASTM/ASME Specifications ASTM A193 / ASME SA 193, ASTM A194 / ASME SA 194
Bolts, Studs Threads UNC, METRIC, BSF, UNF, BSW or Custom
Head drive Phillips, Six-Lobe, Phillips/Slot, Slotted
Stainless Steel Bolts Hex Bolts, Flange Bolts, Square Bolts, T Bolts, Eye Bolts, U Bolts, Lag Bolts, Counter Sunk Bolts, J Bolts, Hex Head Bolts
Stainless Steel Nuts Dome Nut, Square Nut, Coupling Nut, Lock Nut, Hex Head Nut, T Nut, Acorn Nut, Hex Nuts, Wing Nut, Eye Nut, Panel Nut,

BS EN ISO 3506-1

Stainless Steel Bolting ASTM Stainless Steel Nuts ASTM
A193/A320 B8 Class 1 & B8 Class 2 A194 8
A193/A320 B8M Class 1 & B8M Class 2 A194 8M
A193/A320 B8T Class 1 & B8T Class 2 A194 8MA
A193/A320 B8C A194 8T
A193 B6 A194 8C
A453 Grade 660 Class A/B/C/D A194 8A
Types of Stainless Steel Bolts
Stainless Steel Flange Bolts

Stainless Steel Flange Bolts

Marine Grade Stainless Steel Heavy Hex Bolts

Marine Grade Stainless Steel Heavy Hex Bolts

ASTM A193 Stainless Steel Hex Bolts

ASTM A193 Stainless Steel Hex Bolts

High Tensile Stainless Steel Square Bolts

High Tensile Stainless Steel Square Bolts

A193 Stainless Steel U Bolts

A193 Stainless Steel U Bolts

High Strength SS Eye Bolts

High Strength SS Eye Bolts

Stainless Steel Lag Bolts

Stainless Steel Lag Bolts

Marine Grade Stainless Steel Anchor Bolts

Marine Grade Stainless Steel Anchor Bolts

ASTM A193 Stainless Steel Hex Head Bolts

ASTM A193 Stainless Steel Hex Head Bolts

High Tensile Stainless Steel Carriage Bolts

High Tensile Stainless Steel Carriage Bolts

A193 Stainless Steel Allen Cap Bolt

A193 Stainless Steel Allen Cap Bolt

High Strength SS Countersunk Bolts

High Strength SS Countersunk Bolts

Types of SS Threaded Rod and Studs
Stainless Steel Stud Bolts

Stainless Steel Stud Bolts

Marine Grade Stainless Steel Double Ended Studs

Marine Grade Stainless Steel Double Ended Studs

ASTM A193 Stainless Steel Tie Rod

ASTM A193 Stainless Steel Tie Rod

High Tensile Stainless Steel Fully Threaded Studs

High Tensile Stainless Steel Fully Threaded Studs

A193 Stainless Steel Threaded Rod

A193 Stainless Steel Threaded Rod

High Strength SS Unc Stud Bolt

High Strength SS Unc Stud Bolt

Stainless Steel Bolt Shear Strength

Marine grade high strength ASTM A193 bolts are suitable to use between -50 and 400°C temperature, don't forget to compare our prices with other stainless steel bolts & nuts manufacturers in India

METRIC SIZE A1/ A2/ A4-50 (N) A1/ A2/ A4-70 (N) A1/ A2/ A4-80 (N)
M3 2515 3521 4024
M3.5 3390 4646 5424
M4 4390 6146 7024
M5 7100 9940 11360
M6 10050 14070 16080
M7 14450 20230 23120
M8 18300 25620 29280
M10 29000 40600 46400
M12 42150 59010 67440
M14 57500 80500 92000
M16 78500 109900 125600
M18 96000 134400 153600
M20 122500 171500 196000
M22 151500 212100 242400
M24 176500 247100 282400
M27 229500 321300 367200
M30 280500 392700 448800
M33 408500 571900 653600
M36 408500 571900 653600
M39 488000 683200 780800

Stainless Steel Bolts Permitted Shear Stress chart

Type Finish Specification & Condition Dia (in.) 0.2% Yield Stress (ksi) Min. Tensile Requirement Shear Stress (ksi)
Tensile Strength (ksi) No Threads in Shear Plane Threads in Shear Plane
302
304
316
Hot Finished Condition A (Annealed) in ASTM A276-71
Class 1 (solution treated) in ASTM A193-71
all 30 75 15 10.5
302
304
316
Cold Finished Condition A (Annealed) in ASTM A276-71 45 90 18 12.6
302
304
316
Cold Finished Condition B (cold-worked) in ASTM A276-71
Class 2 (solution treated and strain hardened) in ASTM A193-71*
100 125 25 17.5
SS Fasteners manufacturing process
SS Fasteners manufacturing process
Preload and Tightening Torque Table of Stainless Steel Fasteners
Thread Coefficient of friction Preload (Kn) Property Class/ Grade Tightening Torque (Nm) class Min Breaking Torque
A1-50 (303) A2-70 (304) A4-80 (316) A1-50 (303) A2-70 (304) A4-80 (316) A1-50 (303) A1-70 (303) A4-80 (316)
M1.6 0.1 0.4 0.55 0.55 0.1 0.1 0.2 0.15 0.2 0.24
0.2 0.3 0.35 0.35 0.1 0.2 0.35
0.3 0.2 0.3 0.3 0.2 0.25 0.45
M2.0 0.1 0.5 0.6 0.6 0.15 0.2 0.3 0.3 0.4 0.48
0.2 0.4 0.5 0.5 0.25 0.3 0.4
0.3 0.25 0.36 0.36 0.4 0.4 0.55
M2.5 0.1 0.65 0.9 0.9 0.25 0.45 0.6 0.6 0.9 0.96
0.2 0.4 0.5 0.5 0.45 0.6 0.65
0.3 0.3 0.3 0.3 0.6 0.75 0.8
M3.0 0.1 0.9 1 1 0.85 1 1.3 1.1 1.6 1.8
0.2 0.6 0.65 0.65 1 1.1 1.6
0.3 0.4 0.45 0.45 1.25 1.35 1.85
M4.0 0.1 1.08 2.97 2.97 0.8 1.7 2.3 2.7 3.8 4.3
0.2 1.12 2.4 2.4 1.3 2.6 3.5
0.3 0.9 1.94 1.94 1.5 3 4.1
M5.0 0.1 2.26 4.85 4.85 1.6 3.4 4.6 5.5 7.8 8.8
0.2 1.83 3.93 3.93 2.4 5.1 6.9
0.3 1.49 3.19 3.19 2.8 6.1 8
M6.0 0.1 3.2 6.85 6.85 2.8 5.9 8 9.3 13 15
0.2 2.59 5.54 5.54 4.1 8.8 11.8
0.3 2.09 4.49 4.49 4.8 10.4 13.9
M8.0 0.1 5.86 12.6 12.6 6.8 14.5 19.3 23 32 37
0.2 4.75 10.2 10.2 10.1 21.4 28.7
0.3 3.85 8.85 8.85 11.9 25.5 33.9

 

Thread Coefficient of friction Preload (Kn) Property Class/ Grade Tightening Torque (Nm) class Min Breaking Torque
A1-50 (303) A2-70 (304) A4-80 (316) A1-50 (303) A2-70 (304) A4-80 (316) A1-50 (303) A1-70 (303) A4-80 (316)
M10.0 0.1 9.32 20 20 13.7 30 39.4 46 65 74
0.2 7.58 16.2 16.2 20.3 44 58
0.3 6.14 13.1 13.1 24 51 69
M12.0 0.1 13.6 29.1 29.1 23.6 50 67 80 110 130
0.2 11.1 23.7 23.7 34.8 74 100
0.3 9 19.2 19.2 41 88 117
M14.0 0.1 18.7 40 40 37.1 79 106 210 290 330
0.2 15.2 32.6 32.6 56 119 159
0.3 12.3 26.4 26.4 66 141 188
M.16.0 0.1 25.7 55 55 56 121 161      
0.2 20.9 44.9 44.9 86 183 245      
0.3 17 36.4 36.4 102 218 291      
M18.0 0.1 32.2 69 69 81 174 232      
0.2 26.2 56.2 56.2 122 260 346      
0.3 21.1 45.5 45.5 144 380 411      
M20.0 0.1 41.3 88.6 88.6 114 224 325      
0.2 33.8 72.4 72.4 173 370 494      
0.3 27.4 58.7 58.7 205 439 586      
M22.0 0.1 50 107 107 148 318 424      
0.2 41 88 88 227 488 650      
0.3 34 72 72 272 582 776      
M24.0 0.1 58 142 142 187 400 534      
0.2 47 101 101 284 608 810      
0.3 39 83 83 338 724 966      

 

Thread Coefficient of friction Preload (Kn) Property Class/ Grade Tightening Torque (Nm) class
A1-50 (303) A1-50 (303)
M27.0 0.1 75 275
0.2 61 421
0.3 50 503
M33.0 0.1 91 374
0.2 75 571
0.3 61 680
M36.0 0.1 114 506
0.2 94 779
0.3 76 929
M39.0 0.1 135 651
0.2 110 998
0.3 89 1189
  0.1 162 842
0.2 133 1300
0.3 108 1553
Stainless Steel Bolt grades
Stainless Steel Group Grades Tensile Strength range
Austenitic Stainless Steel Bolts 302, 303, 304, 304L, 316, 32, 347 and 348 80,000 - 150,000 PSI
Martensitic Stainless Steel Bolts 410, 416, 420 and 431 180,000 and 250,000 PSI
Ferritic Stainless Steel Bolts 30 and 430F 65,000 - 87,000 PSI
18-8 Stainless Steel Bolts    
305 Stainless Steel Bolts    
Stainless Steel
  • 303, 304, 310, 316, 317, 321, 347, 410, 420, 431, 904L
  • A2-50, A2-70, A2-80, A4-50, A4-70, A4-80, A4-100, A193 / A320 B8, B8M
 

Metric Stainless Steel Fasteners grades

 Steel Composition   Stainless Steel Grade Class Minimum Tensile Strength in MPa
A Austenitic 1 18-8 50 500 (soft)
2 18-8 70 700 (cold-worked)
4 316 80 800 (high strength)
F Ferritic 1 430 45 450 (soft)
60 600 (cold-worked)
C Martensitic 1 410 50 500 (soft)
4 416,416Se 70 700 (hardened and tempered)
    110 1100 (hardened and tempered) (ASTM metric only)
3 431 80 800 (hardened and tempered)
    120 1200 (hardened and tempered) (ASTM metric only)
P Precipitation-Hardening (ASTM metric only) 1 630 (17/4) 90 900
SS Bolt Torque Value comparison with other non ferrous fasteners
Bolts Sizes18-8 Grade
Torque in-lbs
316 Grade
Torque in-lbs
Silicon Bronze
in-lbs
Monel Alloy
in-lbs
Brass
in-lbs
Aluminum 2024-T4
in-lbs
4-405.25.54.85.34.32.9
4-486.66.96.16.75.43.6
5-407.78.17.17.86.34.2
5-449.49.88.79.67.75.1
6-329.610.18.99.87.95.3
6-4012.112.711.212.39.96.6
8-3219.820.718.420.216.210.8
8-36222320.422.418.012.0
10-2422.823.821.225.918.613.8
10-3231.733.129.334.925.919.2
1/4-2075.278.868.885.361.545.6
1/4-289499871067757
5/16-1813213812314910780
5/16-2414214713116011686
3/8-16236247219266192143
3/8-24259271240294212157
7/16-14376393349427317228
7/16-20400418371451327242
1/2-1343454048.735.226
1/2-20454742513727
9/16-12565953654734
9/16-18626558715138
5/8-119296861117660
5/8-18103108961238567
3/4-1012713111815310482
3/4-1612412911514910280
7/8-9194202178231159124
7/8-14193201177230158124
1 - 8286299265344235184
1 - 14259270240311212166
Bolts Sizes18-8 Grade
Torque in-lbs
316 Grade
Torque in-lbs
Silicon Bronze
in-lbs
Monel Alloy
in-lbs
Brass
in-lbs
Aluminum 2024-T4
in-lbs
Fasteners Indian Standard Code
  • IS 1367 - Alloy Steel and Low Carbon High Tensile Bolts, Nuts, Studs, to meet technical specifications as above physical and chemical.
  • IS 3757 - High Tensile Friction Grip Bolts.
  • IS 6623 - High Tensile Friction Grip Nuts.
  • IS 6649 - High Tensile Friction Grip Washers.
  • IS 6639 - Hexagon Bolts for Steel structure.
  • IS 6610 - Heavy washer for Steel structure.
  • IS 3640 - Hexagon Fit Bolts.
  • Bolts- IS 1364, IS 3757, IS 3640, IS 6639.
  • Studs- IS 1862.
  • Nuts- IS 1364, IS 6623.
  • Washers- IS 6648, IS 6610, IS 2016.
  • Threads as per IS 4218.
German DIN Standard SS Nut Bolt
  • DIN 931 & 933 - For High Tensile Bolts.
  • DIN 939– For High Tensile Studs.
  • DIN 934 - For High Tensile Nuts and other German Standards.
  • Metric Hex Nuts (DIN 934)
  • Metric Hex Thin Nuts (DIN 439)
  • Metric Nyloc Hex Nuts (DIN 982)
  • Metric Nyloc Hex Thin Nuts (DIN 985)
  • Metric Dome Nuts (DIN 1587)
  • Metric Dome Nyloc Nuts (DIN 986)
  • Metric Flange Nuts (DIN 6923)
  • Metric Wing Nuts (DIN 315)
  • Metric Square Nuts (DIN 557)
  • Metric Lifting Eye Nuts (DIN 582)
  • Metric Form A Washers (DIN 125)
  • Metric Form B Washers (DIN 125/B)
  • Metric Form C Washers
  • Metric Type M Washers
  • Metric Penny Washers
  • Metric DIN 9021 Washers
  • Metric Washers for Cheesehead (DIN 433)
  • Metric Shakeproof (int) Washers (DIN 6797)
  • Metric Spring Washers (DIN 7980)
  • Metric Spring Wave Washers (DIN 137)
Hex Bolts / Set ScrewsStud Bolts and Threaded RodHexagon NutCap screws
DIN 931 / 933BS4882DIN 934DIN 912 /6912 / 7984
BS 1768DIN 976BS 1768ANSI B18.3
UNI 5731BS 1769ISO 4762
UNI 5739BS 1083UNI 5931
ISO 4014BS 3692BS 2470
ISO 4017ISO 4032BS 4168
BS 1769ISO 4033 
BS 3692ANSI B18.2.2 
ANSI B18.2.1

Socket & Slotted Set Screws Socket & Slotted Countersunk Screws Studs Washers
DIN      
913 DIN 963 / 7991 DIN 938 / 939 / 2510 DIN 125/ 9021
914 BS 4168 BS 4439 BS 4320
915 BS 1981 BS 2693 BS 3410
916 BS 483    
551 BS 2470  
553   Spring Washers
438 DIN 127
BS 4168 BS 4464
BS 1802
ISO Standard for Stainless Steel Bolt
Product Type Metric Specification Scope
DIN standard ISO standard ASME /ANSI
HCS 931 4014 B18.2.3.1M Partially Threaded
933 4017 Fully Threaded
960 8765 Partially Threaded (Fine)
961 8676 Partially Threaded (Fine)
Hex Nuts 934 4032 B18.2.4.1M (style 1) Classes 6, 8, & 10
SHCS 912 4762 B18.3.1  
BHSHCS N/A 7380 B18.3.4M  
FHSCS N/A 7991 B18.3.5  
British Standards (BS) for Stainless Steel Bolts and Nuts
  • BS 1083 - Alloy steel High Tensile Fasteners.
  • BS 3132 & BS 4395 - High Tensile friction Grip Bolts, Nuts and Washers.
Stainless Steel Bolt Nut Chemical Composition

As per DIN 267 Part 11

Grade AISI Stainless Steel Bolts & Nuts Chemical Composition (% maxima unless stated)
C Si Mn P S Cr Mo Ni Cu
A1 SS 202 0.12 1.0 6.5 0.20 0.15-0.35 16,0 - 19,0 0.7 5,0 - 10,0 1.75-2.25
A2 SS 304 0.08 1.0 2.0 0.05 0.03 15,0 - 20,0 0.0 8,0 - 19,0 4.0
A3 SS 321 0.08 1.0 2.0 0.05 0.03 17,0 - 19,0 0.0 9,0 - 12,0 1.0
A4 SS 316 0.08 1.0 2.0 0.05 0.03 16,0 - 18,5 2,0 - 3,0 10,0 - 15,0 4.0
C1 SS 410 0.09-0.15 1.0 1.0 0.05 0.03 11,5 - 14,0 - 1 -
C3 SS 431 0.17-0.25 1.0 1.0 0.04 0.03 16,0 - 18,0 - 1,5 - 2,5 -
C4 SS 416 0.08-0.15 1.0 1.5 0.06 0.15-0.35 12,0 - 14,0 0.6 1 -
F1 SS 430 0.12 1.0 1.0 0.04 0.03 15,0 - 18,0 0.0 1 -

SS Bolts, Studs and Screws Mechanical Properties
Stainless Steel Bolts Grade Class Tensile Stress Rm MPa
(N/mm2) minimum
Yield Strength Rp 0.2 Mpa
(N/mm2) minimum
AL Minimum Elongation Diameter
A2/ A4 Stainless Steel 70 700 450 0.4d =<M20
A2/ A4 Stainless Steel 80 800 600 0.3d =<M20
Stainless Steel Bolts Equivalent Grade
British (BS)FrenchGerman (EN)ItalianJapanese (SUS)SwedishUSA (SS)
304S21Z12CN17.081.4310X12CrNi 17 07SUS30114 23 31301
304S31SUS30214 23 32302
304S15304S16Z8CN18.091.4301X5CrNi 18 10SUS30114 23 33304
304S11Z2CN18.101.4306X2CrNi 18 11SUS304L14 23 52304L
305S19Z8CN18.12X8CrNi 18 12SUS305305
309S24Z15CN24.13X16CrNi 23 14SUS309309
310S24Z12CN25.201.4845Z22CrNi 25 20SUS310S14 23 61310
315S1614 23 40
316S31316S33Z6CND17.111.44011.4436X8CrNiMo 17 13SUS31614 23 4314 23 47316
316S11316S13Z2CND17.121.44041.4435X2CrNiMo 17 12SUS316L14 23 5314 23 48316L
317S12Z2CND19.151.4435X2CrNiMo 18 16SUS317L14 23 67317L
317S161.4436SUS31714 23 66317
320S31320S33Z8CND17.121.45711.457314 23 50
321S31Z6CNT18.121.4541X6CrNiTi 18 11SUS32114 23 37321
347S31Z6CNNb18.111.4558X6CrNiNb 18 11X8CrNiNb 18 11SUS34714 23 38347
403S17Z6C131.4000X6Cr13SUS40314 23 01403
405S17Z6CA131.4002Z6CrA1 13SUS405405
409S191.4512409
430S17Z8C171.4016X8Cr 17SUS43014 23 20430
434S17Z8CD17.011.4113X8CrMo 17SUS43414 23 25434
410S21Z12C131.40061.4024X12Cr 13SUS41013 23 02410
410S45Z30C13X30Cr 13SUS420JS14 23 04420