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Stainless Steel 321 Fasteners

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Stainless Steel 321 Fasteners, ASME SA193 UNS S32100 Hex Bolt, SS 321 Stud Bolt, ASTM A193 Heavy Hex Nut, DIN 1.4541 Allen Bolt, Grade 321 Plain Washer, UNS S32100 Spring Washer.

What does a Stainless Steel 321 Fastener stand for?

Fasteners of the stainless steel 321 grade, which are austenitic and titanium stabilised, exhibit good all-around protection against corrosion. Because of its exceptional susceptibility to a corrosive environment when subjected to temperatures between 427° C and 816° C with chromium precipitation, the 321 grade of stainless steel was developed.

The combination of 321 stainless steel fasteners is stabilized against the development of chromium carbide due to the inclusion of titanium. These fasteners are used in various process conditions to resist corrosion and pitting. It is widely used in electrochemical reactions, especially in manufacturing phosphate-based fertilizers.

How Long Does Stainless Steel Fastener Last?

Depending on the material they are secured to and the amount of use, stainless steel fasteners can survive for many years. Stainless steel fasteners may persist for many years with proper maintenance and upkeep.  A UNS S32100 Stud Bolt can survive at least for 15 years. Tightening and loosening the stainless steel fasteners can reduce the lifespan of the buckle to three years or less in high-use situations when DIN 1.4541 Heavy Hex Bolts are often constricted and loosened.

Characteristics of Stainless Steel 321 Fastener:

  • The material’s minimum yield strength is 205 MPa. This allows the fasteners to be used in applications using high-temperature.
  • The material’s minimum tensile strength is 515Mpa.
  • Sea water and maritime situations won’t cause the 316 fasteners to corrode.
  • The manufacturing process of such fasteners involves heat treatment, surface plating, insert tapping, wire drawing, cold heading, inspection, and packing.
  • Tolerance of ASTM A193 SS 321 Fasteners ranges from +/-0.01mm to +/-0.05mm.

About Stainless Steel 321 Fasteners

Benefits of Stainless Steel 321 Fasteners:

  • Strong resistance to SCC in halide environments
  • Strong resistance to pitting and crevice corrosion
  • High yield strength and tensile strength
  • Strong general resistance to corrosion
  • High thermal conductivity and little thermal expansion
  • Exceptional mechanical toughness
  • A greater ability to withstand corrosive, erosive, and fatigue corrosion

Applications of Stainless Steel 321 Fastener:

Grade 321 PTFE Coated Bolts and screws, Cap fasteners, Metal Forming Screws, Hex Cap Fastenings, and any cold-tipped or hot-welded fasteners are frequently made of stainless steel. Because of its capacity to withstand the corrosive effects of organic acids, it is commonly employed in restaurant management and coloring applications.  Other applications include:

  • Chemical processing: machinery for making phosphoric, sulfuric, inorganic, and organic acids as well as phosphate-based fertilizers  
  • Metallurgical processing: sulfuric acid pickling apparatus  
  • Types of equipment used in the process of oil and gas extraction.  
  • Process equipment for the pharmaceutical industry  
  • Equipment for processing pulp and paper  
  • Pipe systems, condensers, and heat exchangers for saltwater and brackish water

Specification Of Stainless Steel 321 Fasteners

SpecificationsASTM A 193 / ASME SA 193 and DIN, ISO ,JIS ,GB, IS, BS, ASTM and all International Standards
SizeM3 - M100 | 3/6″ - 4″ | Custom Sizes
Fasteners Length3 mm - 200 mm | Custom Sizes
Nuts SizeM3 - M56 | 3/6" to 2" | Custom Sizes
Washers SizeM3 - M56 | 3/6" to 2" | Custom Sizes
DimensionsDIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
Threads ConfigurationASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads and UNF, BSW, BSF, METRIC, UNC, or as required
FormHex, Threading, Square, Round as per Gauge Etc.
HeadHex, Square, Round, Hex flange, Flat, T-head & Triangular etc.
Neck typeHex, Square, Triangular, Oval & Knurled etc.
Manufacturing ProcessPassivation /plain, Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing.
Surface CoatingBlack Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request
PackingIN BULK: carton, pallet, Small Boxes or customer request
Test CertificateAs per EN 10204 / 3.1 Manufacturer Test Certificate, PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified
CertificationDual Certified As per ASTM & ASME Codes
Delivery timeRegular product : 7-15 days, Custom product : 2-4 weeks

Equivalent Grades Stainless Steel 321 Fasteners

STANDARDWERKSTOFF NR.UNSJISEN
SS 3211.4541S32100SUS 321X6CrNiTi18-10

Chemical Composition Stainless Steel 321 Fasteners

GradeCMnSiPSCrMoNiFe
SS 3210.08 max2.0 max1.0 max0.045 max0.030 max17.00 - 19.00-9.00 - 12.00-

Mechanical Properties Stainless Steel 321 Fasteners

GradeTensile Strength (MPa) minYield Strength 0.2% Proof (MPa) minElongation (% in 50mm) minHardness
Rockwell B (HR B) maxBrinell (HB)
max
321515 MPa205 MPa40%95217

Dimensions Of Stainless Steel 321 Fasteners

Stainless Steel Bolts Dimensions Chart :

Nominal Size
or Basic
Product
Diameter

Full-Size Body
Diameter,
E
Width Across Flats,
F
Width Across
Corners, G
Head Height, H BasicRadius of
Fillet, R
Nominal Thread
Length for Bolt
Lengths,
LT
inchmmMaxMinBasic
inch
MaxMinMaxMinBasic
inch
MaxMinMaxMin6 in. and
Shoter
Over
6 in.
1⁄40.250.260.2377⁄160.4380.4250.5050.48411⁄640.1880.150.030.010.751
5⁄160.31250.3240.2981⁄20.50.4840.5770.5527⁄320.2350.1950.030.010.8751.125
3⁄80.3750.3880.369⁄160.5620.5440.650.621⁄40.2680.2260.030.0111.25
7⁄160.43750.4520.4215⁄80.6250.6030.7220.68719⁄640.3160.2720.030.011.1251.375
1⁄20.50.5150.4823⁄40.750.7250.8660.82611⁄320.3640.3020.030.011.251.5
5⁄80.6250.6420.60515⁄160.9380.9061.0831.03327⁄640.4440.3780.060.021.51.75
3⁄40.750.7680.72911⁄81.1251.0881.2991.241⁄20.5240.4550.060.021.752
7⁄80.8750.8950.8521 5⁄161.3121.2691.5161.44737⁄640.6040.5310.060.0222.25
111.0220.9761 1⁄21.51.451.7321.65343⁄640.70.5910.090.032.252.5
1 1⁄81.1251.1491.0981 11⁄161.6881.6311.9491.8593⁄40.780.6580.090.032.52.75
1 1⁄41.251.2771.2231 7⁄81.8751.8122.1652.06627⁄320.8760.7490.090.032.753
1 3⁄81.3751.4041.3452 1⁄162.0621.9942.3822.27329⁄320.940.810.090.0333.25
1 1⁄21.51.5311.472 1⁄42.252.1752.5982.4811.0360.9020.090.033.253.5
1 5⁄81.6251.6581.5912 7⁄162.4382.3562.8152.6161 3⁄321.1160.9780.090.033.53.75
1 3⁄41.751.7851.7162 5⁄82.6252.5383.0312.8931 5⁄321.1961.0540.120.043.754
1 7⁄81.8751.9121.8392 13⁄162.8122.7193.2483.0991 1⁄41.2761.130.120.0444.25
222.0391.964332.93.4643.3061 11⁄321.3881.1750.120.044.254.5
2 1⁄42.252.3052.2143 3⁄83.3753.2623.8973.7191 1⁄21.5481.3270.190.064.755
2 1⁄22.52.5592.4613 3⁄43.753.6254.334.1331 21⁄321.7081.4790.190.065.255.5
2 3⁄42.752.8272.7114 1⁄84.1253.9884.7634.5461 13⁄161.8691.6320.190.065.756
333.0812.9614 1⁄24.54.355.1964.95922.061.8150.190.066.256.5
3 1⁄43.253.3353.214 7⁄84.8754.7125.6295.3722 3⁄162.2511.9360.190.066.757
3 1⁄23.53.5893.4615 1⁄45.255.0756.0625.7862 5⁄162.382.0570.190.067.257.5
3 3⁄43.753.8583.7265 5⁄85.6255.4376.4956.1982 1⁄22.5722.2410.190.067.758
444.1113.975665.86.9286.6122 11⁄162.7642.4240.190.068.258.5

Stainless Steel Stud Bolts Dimensions Chart :

Nominal Size
Diameter, D
inch
Tap End Full
Thread Length,
BM
Umax = 2PMinimum Nut End
Full Thread Length,
Bmin
NominalMin.Max.UNC & NC-5
Thread
UNF Thread8UN ThreadL ≤ 1010
L > 16
1/40.3750.3500.4000.1000.071...0.7501.0001.500
5/160.4690.4400.4980.1110.083--0.8751.1251.625
3/80.5630.5320.5940.1250.083--1.0001.2501.750
7/160.6560.6200.6920.1430.100--1.1251.3751.875
1/20.7500.7080.7920.1540.100--1.2501.5002.000
9/160.8440.8020.8960.1670.111--1.3751.6252.125
5/80.9380.8920.9830.1820.111--1.5001.7502.250
3/41.1.251.0751.1750.2000.125--1.7502.0002.500
7/81.3131.2581.3680.2220.143--2.0002.2502.750
11.5001.4381.5620.2500.167--2.2502.5003.000
1 1/81.6881.6251.7500.2860.1670.2502.5002.7503.250
1 1/41.8751.8131.9380.2860.1670.2502.7503.0003.500
1 3/82.0632.0002.1250.3330.1670.2503.0003.2503.750
1 1/22.2502.1882.3130.3330.1670.2503.2503.5004.000
1 5/82.4382.3752.500----0.2503.5003.7504.250
1 3/42.6252.5632.6880.400--0.2503.7504.0004.500
1 7/82.8132.7502.875----0.2504.0004.2504.750
23.0002.9253.0750.444--0.2504.2504.5005.000
2 1/43.3753.3003.4500.444--0.2504.7505.0005.500
2 1/23.7503.6753.8250.500--0.2505.2505.5006.000
2 3/44.1254.0504.2000.500--0.2505.7506.0006.500
34.5004.4254.5750.500--0.250--6.5007.000
3 1/44.8754.7754.9750.500--0.250--7.0007.500
3 1/25.2505.1505.3500.500--0.250--7.5008.000
3 3/45.6255.5255.7250.500--0.250--8.0008.500
46.0005.9006.1000.500--0.250--8.5009.000

Stainless Steel Nuts Dimensions :

Nominal
Size

inch
Basic Major
Diameter of
Thread
Width Across Flats,
F
Width Across
Corners,
G
Thickness Heavy
Hex Nuts,
H
Thickness Heavy
Hex Jam Nuts,
H1
Maximum Runout of
Bearing Surface to
Thread
Axis, FIM
Heavy HEX NUTSHeavy Hex
Jam Nuts
Specified Proof load
Basic
inch
Min.MaxMin.MaxBasic
inch
Min.MaxBasic
inch
Min.MaxUp to
150,000 psi
150,000 psi
and Greater
All Strength
Levels
1/40.25001/20.4880.5000.5560.57715/640.2180.25011/640.1560.1880.0170.0110.017
5/160.31259/160.5460.5620.6220.65019/640.2800.31413/640.1860.2200.0200.0120.020
3/80.375011/160.6690.6880.7630.79423/640.3410.37715/640.2160.2520.0210.0140.021
7/160.43753/40.7280.7500.8300.86627/640.4030.44117/640.2470.2850.0220.0150.022
1/20.50007/80.8500.8750.9691.01031/640.4640.50419/640.2770.3170.0230.0160.023
9/160.562515/160.9090.9381.0371.08335/640.5260.56821/640.3070.3490.0240.0170.024
5/80.62501 1/161.0311.0621.1751.22739/640.5870.63123/640.3370.3810.0250.0180.025
3/40.75001 1/41.2121.2501.3821.44347/640.7100.75827/640.3980.4460.0270.0200.027
7/80.87501 7/161.3941.4381.5891.66055/640.8330.88531/640.4580.5100.0290.0220.029
11.00001 5/81.5751.6251.7961.87663/640.9561.01235/640.5190.5750.0310.0240.031
1 1/81.12501 13/161.7561.8122.0022.0931 7/641.0791.13939/640.5790.6390.0330.0270.033
1 1/41.250021.9382.0002.2092.3091 7/321.1871.25123/320.6870.7510.0350.0300.035
1 3/81.37502 3/162.1192.1882.4162.5261 11/321.3101.37825/320.7470.8150.0380.0330.038
1 1/21.50002 3/82.3002.3752.6222.7421 15/321.4331.50527/320.8080.8800.0410.0360.041
1 5/81.62502 9/162.4812.5622.8282.9591 19/321.5561.63229/320.8680.9440.0440.0380.044
1 3/41.75002 3/42.6622.7503.0353.1751 23/321.6791.75931/320.9291.0090.0480.0410.048
1 7/81.87502 15/162.8442.9383.2423.3921 27/321.8021.8861 1/320.9891.0730.0510.0440.051
22.00003 1/83.0253.1253.4493.6081 31/321.9252.0131 3/321.0501.1380.0550.0470.055
2 1/42.25003 1/23.3883.5003.8624.0412 13/642.1552.2511 13/641.1551.2510.0610.0520.061
2 1/22.50003 7/83.7503.8754.2754.4742 29/642.4012.5051 29/641.4011.5050.0680.0580.068
2 3/42.75004 1/44.1124.2504.6884.9072 45/642.6472.7591 37/641.5221.6340.0740.0640.074
33.00004 5/84.4754.6255.1025.3402 61/642.8933.0131 45/641.6431.7630.0810.0700.081
3 1/43.250054.8385.0005.5155.7743 3/163.1243.2521 13/161.7481.8760.0870.0750.087
3 1/23.50005 3/85.2005.3755.9286.2073 7/163.3703.5061 15/161.8702.0060.0940.0810.094
3 3/43.75005 3/45.5625.7506.3416.6403 11/163.6163.7602 1/161.9902.1340.1000.0870.100
44.00006 1/85.9256.1256.7557.0733 15/163.8624.0142 3/162.1122.2640.1070.0930.107

Stainless Steel Washer Dimensions Chart :

Nominal SizeTClipped Width E, Min.
I.D.O.D.StandardExtra Thick
[Note (1)]Max.Min.Max.Min.Max.Min.Max.Min.[Note (2)]
1214.4142725.74.63.110810.5
1618.4183432.44.63.110814
2022.5224240.44.63.110817.5
2224.5244442.44.63.410819.2
2426.5265048.44.63.410821
2730.53056S4.14.63.410823.6
3033.6336058.14.63.410826.2
3639.6397270.14.63.410831.S
4245.6458481.87.24.610836.7
4852.7529592.87.24.610842
5662.762107104.88.76.110849
6470.770118115.88.76.110856
7278.778130127.58.76.110863
8086.986142139.58.76.110870
9096.996159156.58.76.110878.7
100107.9107176173.58.76.110887.5

Different Types Of Stainless Steel 321 Fasteners

Different Types Of Bolts
Different Types Of Studs Bolts
Different Types Of Nuts
Different Types Of Washer
Different Types Of Screw

Application of Stainless Steel 321 Fasteners

Testing of Stainless Steel 321 Fasteners

Packing of Stainless Steel 321 Fasteners

Destination Of Stainless Steel 321 Fasteners

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