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Stainless Steel 321 Fasteners Manufacturer & Exporter

Stainless Steel 321 Fasteners

SS UNS S32100 Threaded Stud, 321 Steel Structural Bolts, Stainless Steel 321 Plain Washer Stockholder, ASTM A193 SS Threaded Studs in India.

Ranfit Metal & Alloys is a recognized manufacturer of SS 321 Fasteners, which can also be ordered in the same thickness range. Stainless Steel 321 Fasteners has good strength and excellent general corrosion resistance. 321 Stainless Steel Fasteners is supplied in the annealed condition with a typical brinell hardness. 321 SS Fasteners are used because they are not sensitive to inter-granular corrosion after heating within the carbide precipitation range. Alloy Fasteners is developed to provide an 18 - 8 type alloy with improved inter-granular corrosion resistance. Grade 321 Fasteners is commonly used for service in the 1000 Degree F – 1600 Degree F temperature range. Type 321 Fasteners is used in particular applications within the sensitizing temperature range.

Stainless Steel UNS S32100 Fasteners is stabilized by additions of titanium to reduce or prevent carbide precipitation during welding. UNS S32100 Stainless Steel Fasteners is used for instruments and construction parts in the food industry, along with in film and photo industry. These Fasteners are common to the petroleum refining industries. Our Fasteners offers as its main advantage an excellent resistance to inter-granular corrosion following exposure to temperatures in the chromium carbide precipitation range. The 18 / 8 blend of chromium and nickel is tempered with titanium to give Type 321 Fasteners protection from inter-granular corrosion that can occur after heat treatment.

321 Stainless Steel T-Head Bolts, SS DIN 1.4541 Eye Bolts, Stainless Steel 321 Lock Nut, ASME SA193 SS 32100 Allen Cap Screw Manufacturers in India.


Stainless Steel 321 Fasteners Specification

Grade Stainless Stel 321 (S32100)
321 Fasteners Specifications ASTM F593, F594, F1554 / ASME SF593, F594, F1554
321 SS Fasteners size Bolt / Screw Size : M3 - M56 | 3/6" to 2" | Custom Sizes
Nuts Size : M3 - M56 | 3/6" to 2" | Custom Sizes
Washers Size : M3 - M56 | 3/6" to 2" | Custom Sizes
Machine Screws Size : M1.6 - M12
Self Tapping Screw Size : No.2 - No. 14
SS 321 Fasteners Length 3 mm to 200 mm
SS 321 Studs, Bolts, Threads UNF, BSW, BSF, METRIC, UNC, or as required
Standard of Stainless Steel 321 Fasteners DIN : DIN 934, DIN 931, DIN 970, DIN 933
UTS : UNEF, NPT, UNC, UNS, UNF, NPTF
ISO : JIS standards, ISO 4033, ISO 4032,
ANSI – American National Standards Institute
ASME B18.5
ANSI B 28.2.4 1M
as per defined in ASME B16.5 standard SS 321 Stud Bolt length
ANSI B 18.2.4 2M
as per defined in ASME B18.2.2 SS 321 Hex nuts
Form of SS 321 Fasteners Hex, Threading, Square, Round as per Gauge Etc.
Raw materials Source JSPL, Mukund Steel, Tata Steel, Dhamm Steel, Usha Martin,etc.
Threads Configuration ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
Certification Dual Certified As per ASTM & ASME Codes
Dimensions DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
Threads Unless otherwise specified, the threads shall be rolled or cut and tapped horizontally or vertically
Test Certificate of SS 321 Bolting as per EN 10204 / 3.1 Manufacturer Test Certificate
Additional Certifications PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified
Production process M24-M100: hot forging , M2-M24: Cold Froging, for custom-made connecting element machining and CNC
Head drive of SS 321 Bolts Six-Lobe,Phillips,Phillips/Slot, Slotted etc
Packing of SS 321 Fasteners IN BULK: canton, pallet, Small Boxs / carton / pallet, or customer request
Surface Coating Ptfe Coated Stainless Steel 321 Fasteners
Phosphate Coating
Teflon Coating
Zinc Coating
Hot Dipped Galvanizing Coating
Cadmium Coating
Xylon Coating
Stainless Steel 321 Fasteners finishing Stainless steel : Self-Colour, Passivated, Bright Zinc Plated (BZP), Hot Dip Galvanised (HDG), Stainless Steel, Sherardized, some special one like DACROMET Geometry and Mechanically Applied coating ,Dacroment, nickel plated, anodizing, plated zinc-nickel
Zinc (blue, black, yellow, white), black oxide,

Stainless Steel 321 Fasteners Equivalent Grades

STANDARD WERKSTOFF NR. UNS JIS EN
SS 321 1.4541 S32100 SUS 321 X6CrNiTi18-10

Chemical Composition of SS 321 Fasteners

Grade C Mn Si P S Cr N Ni Ti
SS 321 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 - 19.00 0.10 max 9.00 - 12.00 5(C+N) – 0.70 max

Mechanical Properties of SS 321 Fasteners

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1457 °C (2650 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

Types of Stainless Steel 321 Fasteners

Stainless Steel 321 Nuts

Stainless Steel 321 Bolts

Stainless Steel 321 Washers

Stainless Steel 321 Stud Bolts

Stainless Steel 321 Screws

Stainless Steel 321 Dowel Pins

Stainless Steel 321 Threaded Hanger Bolt

Stainless Steel 321 Hexagon Cap Screw

Stainless Steel 321 Star Washers

Stainless Steel 321 Socket Set Screw

Stainless Steel 321 Eye Bolts

Stainless Steel 321 Square U-Bolts

Stainless Steel 321 Stud Anchor

Stainless Steel 321 Threaded Inserts

Stainless Steel 321 J Bolts

Stainless Steel 321 Square Nuts

Stainless Steel 321 Countersunk Washers

Stainless Steel 321 Barrel Nuts


ASTM A193/A194 SS 321 Fasteners Forms & Availability

Products Size
ASTM A193 / A194 321 SS Stud Bolt ASTM A193 / A194 321 SS Bolts Sizes M3 - M56 | 3/6" to 2"
ASTM A193 / A194 321 SS Punched Washer ASTM A193 / A194 321 Stainless Steel Pan Head Screw
ASTM A193 / A194 321 Stainless Square Nut ASTM A193 / A194 321 SS Insert Nuts
ASTM A193 / A194 321 SS Welding Studs ASTM A193 / A194 321 SS Pan Head Screw
ASTM A193 / A194 321 Stainless Cap Screw ASTM A193 / A194 321 Stainless Foundation Bolts
ASTM A193 / A194 321 SS Threaded Rod ASTM A193 / A194 321 Stainless Hex Head Bolts
ASTM A193 / A194 321 Stainless Nuts ASTM A193 / A194 321 Stainless Washers
ASTM A193 / A194 321 SS Fender Washer ASTM A193 / A194 321 SS Lock Nut
ASTM A193 / A194 321 SS Countersunk Slotted Screw ASTM A193 / A194 321 SS Double Ended Stud

SS 321 Hex Bolt Dimensions

Nominal Size (D) Body Diameter Head Thickness ASTM A193 Acro ASTM A193 The Flats Acro ASTM A193 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

SS 321 Nuts Dimensions

Nominal Size or Basic Major Thread Diameter F G H
Width Across Flats Width Across Corners Thickness
Basic Max Min Max Min Basic Max Min
1/4 .2500 1/2 .500 .488 .577 .556 15/64 .250 .218
5/16 .3125 9/16 .562 .546 .650 .622 19/64 .314 .280
3/8 .3750 11/16 .688 .669 .794 .763 23/64 .377 .341
7/16 .4375 3/4 .750 .728 .866 .830 27/64 .441 .403
1/2 .5000 7/8 .875 .850 1.010 .969 31/64 .504 .464
9/16 .5625 15/16 .938 .909 1.083 1.037 35/64 .568 .526
5/8 .6250 1-1/16 1.062 1.031 1.227 1.175 39/64 .631 .587
3/4 .7500 1-1/4 1.250 1.212 1.443 1.382 47/64 .758 .710
7/8 .8750 1-7/16 1.438 1.394 1.660 1.589 55/64 .885 .833
1 1.0000 1-5/8 1.325 1.575 1.876 1.796 63/64 1.012 .956
1-1/8 1.1250 1-13/16 1.812 1.756 2.093 2.002 1-7/64 1.139 1.079
1-1/4 1.2500 2 2.000 1.938 2.309 2.209 1-7/32 1.251 1.187
1-3/8 1.3750 2-3/16 2.188 2.119 2.526 2.416 1-11/32 1.378 1.460
1-1/2 1.5000 2-3/8 2.375 2.300 2.742 2.622 1-15/32 1.505 1.433
1-5/8 1.6250 2-9/16 2.562 2.481 2.959 2.828 1-19/32 1.632 1.556
1-3/4 1.7500 2-3/4 2.750 2.662 3.175 3.035 1-23/32 1.759 1.679
2 2.0000 3-1/8 3.125 3.025 3.608 3.449 1-31/32 2.013 1.925
2-1/4 2.2500 3-1/2 3.500 3.388 4.041 3.862 2-13/64 2.251 2.155
2-1/2 2.5000 3-7/8 3.875 3.750 4.474 4.275 2-29/64 2.505 2.401
2-3/4 2.7500 4-1/4 4.250 4.112 4.907 4.688 2-45/64 2.759 2.647
3 3.0000 4-5/8 4.625 4.475 5.340 5.102 2-61/64 3.013 2.893
3-1/4 3.2500 5 5.000 4.838 5.774 5.515 3-3/16 3.252 3.124
3-1/2 3.5000 5-3/8 5.375 5.200 6.207 5.928 3-7/16 3.506 3.370
3-3/4 3.7500 5-3/4 5.750 5.562 6.640 6.341 3-11/16 3.670 3.616
4 4.0000 6-1/8 6.125 5.925 7.073 6.755 3-15/16 4.014 3.862

ASTM / DIN Specification of Stainless Steel 321 Fasteners

ASTM A193 ASTM A194 ASTM F2281
ASTM A193M ASTM A194M ASTM A962
ASTM A320 ASTM F593-13a ASTM A962M
ASTM A320M ASTM F594-15
DIN 580 DIN 6914 DIN 6921
DIN 582 DIN 3570 DIN 603
DIN 444 DIN 7990 DIN 2510
DIN 939 DIN 1B DIN 976
DIN 933 DIN 529 DIN 912
DIN 931 DIN 6325

Stainless Steel 321 Fasteners Standard

Hexagon Bolt / Set Screws Stud Bolt Hexagon Nuts Socket Cap screws
DIN 931 BS4882 DIN 934 DIN 912
DIN 933 DIN 976 BS 1768 DIN 6912
BS 1768 BS 1769 DIN 7984
UNI 5731 BS 1083 ANSI B18.3
UNI 5739 BS 3692 ISO 4762
ISO 4014 ISO 4032 UNI 5931
ISO 4017 ISO 4033 BS 2470
BS 1769 ANSI B18.2.2 BS 4168
BS 3692
ANSI B18.2.1
Socket & Slotted Set Screws Socket & Slotted Countersunk Screws Studs Washers
DIN 913 DIN 963 DIN 938 DIN 125
DIN 914 DIN 7991 DIN 939 DIN 9021
DIN 915 BS 4168 DIN 2510 BS 4320
DIN 916 BS 1981 BS 4439 BS 3410
DIN 551 BS 483 BS 2693
DIN 553 BS 2470 Spring Washers
DIN 438 DIN 127
BS 4168 BS 4464
BS 1802

SS 321 Flat Washer Dimension Chart

Size Inside Diameter Outside Diameter Thickness
#2 3/32" 1/4" .020"
#4 1/8" 5/16" 1/32"
#8 3/16" 7/16" 3/64"
#10 7/32" 1/2" 3/64"
#6 5/32" 3/8" 3/64"
1/4 9/32" 5/8" 1/16"
3/8 13/32" 13/16" 1/16"
7/16 15/32" 59/64" 1/16"
1/2 17/32" 1-1/16" 3/32"
9/16 19/32" 1-3/16" 3/32"
5/16 11/32" 11/16" 1/16"
1-3/4 1-7/8" 4" 3/16"
5/8 21/32" 1-5/16" 3/32"
3/4 13/16" 1-1/2" 9/64"
7/8 15/16" 1-3/4" 9/64"
1" 1-1/16" 2" 9/64"
1-1/8 1-3/16" 2-1/4" 9/64"
1-1/4 1-5/16" 2-1/2" 5/32"
1-1/2 1-7/16" 3" 3/16"
1-5/8 1-3/4" 3-3/4" 3/16"
2 2-1/8" 4-1/2" 3/16"

SS 321 Plain Washer Dimension

Size Inside Diameter Outside Diameter Thickness
3/16 1/4" 9/16" 3/64"
1/4 5/16" 3/4" 1/16"
3/8 7/16" 1" 5/64"
7/16 1/2" 1-1/4" 5/64"
1/2 9/16" 1-3/8" 7/64"
9/16 5/8" 1-1/2" 7/64"
5/8 11/16" 1-3/4" 9/64"
3/4 13/16" 2" 5/32"
5/16 3/8" 7/8" 5/64"
7/8 15/16" 2-1/4" 1/64"
1 1-1/16" 2-1/2" 11/64"
1-1/8 1-1/4" 2-3/4" 11/64"
1-1/4 1-3/8" 3" 11/64"
1-3/8 1-1/2" 3-1/4" 3/16"
1-5/8 1-3/4" 3-3/4" 3/16"
1-3/4 1-7/8" 4" 3/16"
2 2-1/8" 4-1/2" 3/16"
2-1/2 2-5/8" 4-1/2" 3/16"
3 3-1/8" 5-1/2" 9/32"
1-1/2 1-5/8" 3-1/2" 3/16"

Stainless Steel 321 Washers Sizes

Size USS SAE
Inside Diameter
(A)
Outside Diameter
(B)
Thickness
(C)
Inside Diameter
(A)
Outside Diameter
(B)
Thickness
(C)
#2 - - - 3/32" 1/4" 0.020"
#4 - - - 1/8" 5/16" 0.032"
#6 - - - 5/32" 3/8" 0.049"
#8 - - - 3/16" 7/16" 0.049"
#10 - - - 7/32" 1/2" 0.049"
#12 - - - 1/4" 9/16" 0.065"
1/4" 5/16" 0.734" 0.065" 9/32" 5/8" 0.065"
5/16" 3/8" 7/8" 0.083" 11/32" 11/16" 0.065"
3/8" 7/16" 1" 0.083" 13/32" 13/16" 0.065"
7/16" 1/2" 1-1/4" 0.083" 15/32" 15/16" 0.065"
1/2" 9/16" 1-3/8" 0.109" 17/32" 1-1/16" 0.095"
9/16" 5/8" 1-15/32" 0.109" 19/32" 1-5/32" 0.095"
5/8" 11/16" 1-3/4" 0.134" 21/32" 1-5/16" 0.095"
3/4" 13/16" 2" 0.148" 13/16" 1-15/32" 0.134"
7/8" 15/16" 2-1/4" 0.165" 15/16" 1-3/4" 0.134"
1" 1-1/16" 2-1/2" 0.165" 1-1/16" 2" 0.134"
1-1/8" 1-1/4" 2-3/4" 0.165" - - -
1-1/4" 1-3/8" 3" 0.165" - - -
1-3/8" 1-1/2" 3-1/4" 0.180" - - -
1-1/2" 1-5/8" 3-1/2" 0.180" - - -
1-5/8" 1-3/4" 3-3/4" 0.180" - - -
1-3/4" 1-7/8" 4" 0.180" - - -
2" 2-1/8" 4-1/2" 0.213" - - -

Stainless Steel 321 Stud Bolt Size Chart

 Class 150 Flanges ASME B16.5 (Stud bolt sizes) Length of Stud Bolts 
NPS Outside Diameter of Flange The diameter of Bolt Circle The diameter of Bolt Holes Number of Bolts Diameter of Bolts Raised Face
0.06 in
Ring Joint
1/2 3 1/2 2 3/8 5/8 4 1/2 2 1/4
3/4 3 7/8 2 3/4 5/8 4 1/2 2 1/2
1 4 1/4 3 1/8 5/8 4 1/2 2 1/2 3
1 1/4 4 5/8 3 1/2 5/8 4 1/2 2 3/4 3 1/4
1 1/2 5 3 7/8 5/8 4 1/2 2 3/4 3 1/4
2 6 4 3/4 3/4 4 5/8 3 1/4 3 3/4
2 1/2 7 5 1/2 3/4 4 5/8 3 1/2 4
3 7 1/2 6 3/4 4 5/8 3 1/2 4
3 1/2 8 1/2 7 3/4 8 5/8 3 1/2 4
4 9 7 1/2 3/4 8 5/8 3 1/2 4
5 10 8 1/2 7/8 8 3/4 3 3/4 4 1/4
6 11 9 1/2 7/8 8 3/4 4 4 1/2
8 13 1/2 11 3/4 7/8 8 3/4 4 1/4 4 3/4
10 16 14 3/4 1 12 7/8 4 1/2 5
12 19 17 1 12 7/8 4 3/4 5 1/4
14 21 18 3/4 1 1/8 12 1 5 1/4 5 3/4
16 23 1/2 21 1/4 1 1/8 16 1 5 1/4 5 3/4
18 25 22 3/4 1 1/4 16 1 1/8 5 3/4 6 1/4
20 27 1/2 25 1 1/4 20 1 1/8 6 1/4 6 3/4
24 32 29 1/2 1 1/4 20 1 1/4 6 3/4 7 1/4
Class 300 Flanges ASME B16.5 Length of Stud Bolts 
NPS Outside Diameter of Flange The diameter of Bolt Circle The diameter of Bolt Holes Number of Bolts Diameter of Bolts Raised Face
0.06 in
Ring Joint
1/2 3 3/4 2 5/8 5/8 4 1/2 2 1/2 3
3/4 4 5/8 3 1/4 3/4 4 5/8 3 3 1/2
1 4 7/8 3 1/2 3/4 4 5/8 3 3 1/2
1 1/4 5 1/4 3 7/8 3/4 4 5/8 3 1/4 3 3/4
1 1/2 6 1/8 4 1/2 7/8 4 3/4 3 1/2 4
2 6 1/2 5 3/4 8 5/8 3 1/2 4
2 1/2 7 1/2 5 7/8 7/8 8 3/4 4 4 1/2
3 8 1/4 6 5/8 7/8 8 3/4 4 1/4 4 3/4
3 1/2 9 7 1/4 7/8 8 3/4 4 1/4 5
4 10 7 7/8 7/8 8 3/4 4 1/2 5
5 11 9 1/4 7/8 8 3/4 4 3/4 5 1/4
6 12 1/2 10 5/8 7/8 12 3/4 4 3/4 5 1/2
8 15 13 1 12 7/8 5 1/2 6
10 17 1/2 15 1/4 1 1/8 16 1 6 1/4 6 3/4
12 20 1/2 17 3/4 1 1/4 16 1 1/8 6 3/4 7 1/4
14 23 20 1/4 1 1/4 20 1 1/8 7 7 1/2
16 25 1/2 22 1/2 1 3/8 20 1 1/4 7 1/2 8
18 28 24 3/4 1 3/8 24 1 1/4 7 3/4 8 1/4
20 30 1/2 27 1 3/8 24 1 1/4 8 8 3/4
24 36 32 1 5/8 24 1 1/2 9 10

ANSI and/or ASME Standards Stainless Steel 321 Fasteners(inch series)

ASME B18.1.1 Small Solid Rivets ASME B18.8.1 Clevis Pins and Cotter Pins
ASME B18.1.2 Large Rivets ASME B18.8.2 Taper Pins, Dowel Pins, Straight Pins, Grooved Pins and Spring Pins
ASME B18.2.1 Square and Hex Bolts and Screws ASME B18.9 Plow Bolts
ASME B18.2.2 Square and Hex Nuts ASME B18.10 Track Bolts and Nuts
ASME B18.2.6 Fasteners for use in Structural Applications ASME B18.11 Miniature Screws
ASME B18.3 Socket Cap, Shoulder and Set Screws ASME B18.13 Screws and Washer Assemblies (Sems)
ASME B18.5 Round Head Bolts ASME B18.15 Forged Eyebolts
ASME B18.6.2 Slotted Head Cap Screws, Square Head Set Screws, and Slotted Headless Set Screws ASME B18.17 Wing Nuts, Thumb Screws and Wing Screws
ASME B18.6.3 Machine Screws and Machine Screws Nuts ASME B18.21.1 Lock Washers
ASME B18.6.4 Thread Forming and Thread Cutting Tapping Screws and Metallic Drive Screws ASME B18.22.1 Plain Washers
ASME B18.7 General Purpose Semi- Tubular Rivets, Full Tubular Rivets, Split Rivets and Rivet Caps ASME B18.23.1 Beveled Washers

Other Types of SS 321 Fasteners

Stainless Steel 321 Nuts SS 321 Thread Rolling Screw
Stainless Steel 321 Hex Set Screw Grade 321 SS Industrial Fasteners
SS JIS SUS 321 Coupling Nut UNS S32100 Stainless Steel Wing Nuts
321 Stainless Steel Mushroom Head Square Neck Bolts ASTM A193 SS 321 Allen Cap Screw Stockists
Grade 321 Stainless Steel Hex Head Bolt SS UNS S32100 Socket Cap Screw
ANSI B18.2 Stainless Steel 321 Carriage Bolt 321 Stainless Steel Flange Bolt
Stainless Steel 321 Elevator Bolt ASME SA193 321 Stainless Steel Machine Bolt
SS DIN 1.4541 Fasteners Supplier SS EN X6CrNiTi18-10 Bolted Joints
ASTM A193 Stainless Steel 321 Bolted Joints 321 Stainless Steel Fastener Supplier
Stainless Steel 321 Flat Washers SS DIN 1.4541 Machine Fasteners Dealer

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