Manufactures & Suppliers of Pipes, Tubes, Flanges, Pipe Fitting & Fasteners

Natron Steel Pipe Tube is a leading manufacturer of stainless steel hex bolts, offering a variety of grades to suit different requirements. Our range includes stainless steel hex bolts, crafted primarily from 18/8 grade austenitic stainless steel for reliable performance. These bolts generally consist of carbon, manganese, phosphorus, sulfur, along with 18% chromium and 8% nickel, although specific compositions may vary by grade.

316 Stainless Steel Hex Bolts, 304 Stainless Steel Hex Bolts, Stainless Steel Heavy Hex Bolt, Stainless Steel Hex Head Bolt Supplier in Mumbai, India.

Stainless steel hex bolts provide excellent torque strength and are easy to install with standard tools. For applications that require high corrosion resistance, such as those in seawater and marine environments, our stainless steel hex bolts are an ideal choice, specifically designed to resist chloride-induced stress corrosion cracking. The molybdenum content in 316-grade bolts enhances these corrosion-resistant properties. However, SS hex bolts remain the most popular due to their balanced strength, corrosion resistance, and cost-effectiveness.


Various specifications and material grades are available, including the stainless steel hex bolt A2-70, designed for specialized applications. Bolt sizes range from ¼ inch to 2 ½ inches, with dimensions varying across standards.


Stainless Steel Hex Bolts Specification

Product name Stainless Steel Hex Bolts
Standard ISO 4017, DIN931, GB5783, DIN, ASTM, ANSI, JIS, EN, AS
DIN Standard B.S. DIN933 DIN931 DIN934 DIN912 DIN603 DIN6923
Surface
Passivation /plain
Size M2 - M100
Diameter M3-M60
Length 6mm-500mm
Head Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc
Neck type Hex, Square, Triangular, Oval & Knurled etc
Drive type Phil, Slotted, Hex socket, Torx & square slot etc
Stainless Steel Hex Bolts Application Wind tower, Nuclear power, Railway, Automotive industry, Construction, Electronic industry
Dimensions ASME B18.6.3 **Exception: screws 6 inches and shorter are fully threaded.
Drive Style

Type I

Stainless Steel Hex Bolts Material 18-8 Stainless Steel, stainless steel ss 304/ SS316 A2/A4, SS201, SS303, SS304, SS316, SS316L, SS904L, A2-70; A4-70; A4-80
Thread Requirements ASME B1.1, UNC & UNF, Class 2A (Fastenal will inspect and accept parts with a 1A no-go gauge)
Finish Per ASTM A380/A380M
Finishing Zinc Plated (Yellow, White, Blue, Black), Hop Dip Galvanized (HDG) phosphorization, Black Oxide, Geomet, Dacroment, anodization, Nickel plated, Zinc-Nickel plated, Brass Plated, Tin Plated, Black Plated, Copper Plated, Gold Plated, Salt fog test
Others OEM, ODM, ±0.03MM tolerance
Surface treatment of stainless steel Hex Bolts
  • Passivation
  • Polish
  • Anodizing
  • Sand blasting
  • Electroplating (color, blue, white, black zinc, Ni, Cr, tin, copper, silver)
  • Black oxide coating
  • Heat-disposing
  • Hot-dip galvanizing
  • Rust preventive oil
Coatings Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request
Tolerance +/-0.01mm to +/-0.05mm

Stainless Steel Hex Bolts are externally threaded fasteners featuring a six-sided head, intended for use with a wrench for secure installation. These bolts can come with either partial or full threading and are available with hexagonal caps or tap heads. The SS 304 Hex Bolt, a sturdy bolt with a hex head, is commonly used to join wood-to-wood or metal-to-wood connections. Due to its tendency to spin during tightening, it’s necessary to secure the bolt head with a socket or wrench while using a second wrench on the nut.


The A2-70 Hex Head Bolt is an acid-resistant austenitic stainless steel grade that has been cold-worked to achieve a minimum tensile strength of 700N/mm² (MPa). Stainless Steel Hex Bolts possess a range of valuable properties, making them ideal for use in manufacturing components and parts across numerous industrial applications.

Stainless Steel Hex Bolts Dimensions

Bolt Size A (max) B C (min) D E F
Thread Length
for Bolt Length
max min 6" and
shorter
over 6"
1/4" 0.260 7/16 0.484 11/64 0.03 0.01 0.750 1.000
5/16" 0.324 1/2 0.552 7/32 0.03 0.01 0.875 1.125
3/8" 0.388 9/16 0.620 1/4 0.03 0.01 1.000 1.250
7/16" 0.452 5/8 0.687 19/64 0.03 0.01 1.125 1.375
1/2" 0.515 3/4 0.826 11/32 0.03 0.01 1.250 1.500
5/8" 0.642 15/16 1.033 27/64 0.06 0.02 1.500 1.750
3/4" 0.768 1-1/8 1.240 1/2 0.06 0.02 1.750 2.000
7/8" 0.895 1-5/16 1.447 37/64 0.06 0.02 2.000 2.250
1" 1.022 1-1/2 1.653 43/64 0.09 0.03 2.250 2.500
1-1/8" 1.149 1-11/16 1.859 3/4 0.09 0.03 2.500 2.750
1-1/4" 1.277 1-7/8 2.066 27/32 0.09 0.03 2.750 3.000
1-3/8" 1.404 2-1/16 2.273 29/32 0.09 0.03 3.000 3.250
1-1/2" 1.531 2-1/4 2.480 1 0.09 0.03 3.250 3.500
1-3/4" 1.785 2-5/8 2.893 1-5/32 0.12 0.04 3.750 4.000
2" 2.039 3 3.306 1-11/32 0.12 0.04 4.250 4.500
2-1/4" 2.305 3-3/8 3.719 1-1/2 0.19 0.06 4.750 5.000
2-1/2" 2.559 3-3/4 4.133 1-21/32 0.19 0.06 5.250 5.500
2-3/4" 2.837 4-1/8 4.546 1-13/16 0.19 0.06 5.750 6.000
3" 3.081 4-1/2 4.959 2 0.19 0.06 6.250 6.500
3-1/4" 3.335 4-7/8 5.372 2-3/16 0.19 0.06 6.750 7.000
3-1/2" 3.589 5-1/4 5.786 2-5/16 0.19 0.06 7.250 7.500
3-3/4" 3.858 5-5/8 6.198 2-1/2 0.19 0.06 7.750 8.000
4" 4.111 6 6.612 2-11/16 0.19 0.06 8.250 8.500

SS Hex Bolt Weight Chart Table

LENGTH in mm DIAMETER (METRIC)
M5 M6 M12 M8 M10 M16 M14 M20 M18 M22
16 0.448 0.743 1.590 3.211
20 0.598 0.812 4.892 1.711 3.411
25 0.660 0.897 5.252 1.871 3.660 8.170
30 0.737 1.010 5.574 2.070 3.912 10.707 9.690 18.657
35 0.804 1.120 5.974 2.271 4.223 11.416 10.000 19.608 16.026
40 0.881 1.230 6.410 2.470 4.533 12.107 10.288 20.747 16.667
45 0.958 1.340 6.859 2.671 4.840 12.821 10.504 21.739 17.241
50 1.030 1.450 7.299 2.870 5.155 13.624 11.261 22.727 17.857 28.409
55 1.560 7.740 3.071 5.464 14.409 11.628 23.810 18.868 30.120
60 1.670 8.183 3.270 5.774 15.244 12.255 25.126 20.000 32.051
65 1.781 8.621 3.472 6.083 16.026 12.626 26.455 21.008 34.014
70 1.890 9.058 3.671 6.394 16.835 12.987 27.778 22.124 35.461
75 2.000 9.506 3.873 6.702 17.606 13.228 29.070 23.256 39.063
80 2.111 10.000 4.072 7.013 18.248 13.889 30.303 24.510 40.000
90 10.917 4.472 7.634 19.841 14.925 33.113 26.042 41.667
100 11.820 4.873 8.251 21.459 16.340 35.714 27.778 46.296
110 12.723 8.881 23.041 17.730 38.168 31.250 47.170
120 13.624 9.506 24.631 18.797 40.984 32.895 50.000
130 14.535 10.101 26.316 20.000 43.478 34.722 52.632
140 15.432 10.707 27.933 20.833 46.296 35.461 55.556
150 16.340 11.312 29.412 22.222 48.544 37.594 58.824
160 17.241 11.905 31.056 24.272 50.505 40.984 61.728
170 18.116 12.500 32.680 53.191 64.935
180 19.011 13.123 34.247 26.882 55.556 67.568
190 19.920 13.736 35.971 58.140 70.423
200 20.833 14.327 37.594 29.586 60.976 49.020 73.529
220 22.624 15.528 40.650 65.789 79.365
240 24.510 16.722 43.860 71.429 84.746
250 25.381 17.301 45.455 74.627 87.719
260 26.316 17.921 47.170 76.923 90.909
280 28.090 19.157 50.505 81.967 98.039
300 29.940 20.325 53.763 87.719 104.167
320 31.646 56.818 92.593
340 33.557 60.241 98.039
360 35.211 63.291 104.167
380 37.037 66.667 108.696
400 39.063 69.444 113.636