Supplies A Full Range Of 321 Stainless Steel Hex Nuts, Stainless Steel 321 Bolts, SS 321 Bolts, 321 SS Hex Bolts At Factory Price In India
Carries A Complete Line Of Stainless Steel 321 Nuts, 321 SS Stud Bolt Materials, SS 321 Socket Cap Screw, 321 Stainless Steel Bolts In Mumbai, India
One of the reasons for the development of 321 grade of stainless steel was because of its excellent resistance to intergranular corrosion when exposed to a temperature range of 427° C to 816° C during chromium precipitation. The addition of titanium in the alloy of 321 Stainless Steel Fasteners is the reason it is stabilized against chromium carbide formation.

321 Stainless Steel Fasteners Manufacturers In India

321 Stainless Steel Bolts

321 Stainless Steel Studs

321 Stainless Steel Nuts

321 Stainless Steel Hex Bolts

321 Stainless Steel Threaded Rod
Table of Content
- 321 Stainless Steel Fasteners Price List
- 321 Stainless Steel Fasteners Specifications
- Weight Calculator of Stainless Steel UNS S32100 Fasteners
- Dimensions of Stainless Steel 321 Hex Nuts
- 321 Stainless Steel Bolts Dimensions
- 321 Stainless Steel Flat Washer Dimensions
- Size Chart of AISI 321 Stainless Steel Nuts
- Size Chart of 321 Stainless Steel Screws
- Size Chart of SUS321 Stainless Steel Washer
- Dimensions of Stainless Steel 321 Nuts
- Dimensions of SS UNS S32100 Heavy Hex Nuts
- 321 Stainless Steel Bolts Type
- 321 Stainless Steel Studs Types
- 321 Stainless Steel Nuts Types
- 321 Stainless Steel Screws Types
- 321 Stainless Steel Washers Types
- Chemical Composition of 321 Stainless Steel Fasteners
- Stainless Steel 321 Fasteners Mechanical Properties
- 321 Stainless Steel Fasteners Equivalent Grade
- AISI 321 Stainless Steel Fasteners Physical Properties
- Other Types Of SUS321 Stainless Steel Fasteners
- Application of SS 321 Fasteners
Apart from being resistant to intergranular corrosion, SS 321 Socket Cap Screw the is well suited for high temperature applications because the fasteners retain their good mechanical properties like high creep and stress rupture strength even at elevated temperatures.While 304L grade stainless steel fasteners are limited to temperature applications up to 426° C, 321 grade stainless steels can be used up to a maximum of 816° C.
The corrosion resistance for both SS 321 Bolts and 304 are similar in terms of general and localized corrosion. Although prolonged heating of 321 grade at chromium precipitation range may affect the general resistance of the alloy in corrosive media. Similar to ss 304, Stainless Steel 321 Bolts are susceptible to stress related corrosion cracking when exposed to environments containing halide compounds.
The resistance of the alloy of Stainless Steel 321 Nuts is similar to fasteners of the 304 grade or Type 304L, in the presence of chloride ion.In applications where there are crevices present, 100 ppm chloride in aqueous environments is considered to be the limit for both the stabilized alloys like 321 SS Stud Bolt as well as unsterilized alloys. Levels of chloride ion higher than 100 ppm or parts per million can cause either or both crevice corrosion and pitting. In case of applications, where the content of chloride level is high, it is better that stainless steel grades like 316 or higher molybdenum content stainless steel grades be considered.
The SS 321 Screws are not recommended for exposure to brine or salt water. Hence they are not to be used in marine
| Specifications of 321 Stainless Steel Fasteners | ASTM A193 / A193, ASME SA193 / SA194 |
| Standard of 321 Stainless Steel Fasteners | DIN, ASTM, BS and all International Standards |
| Length of 321 Stainless Steel Fasteners | 3 mm to 200 mm |
| 321 Stainless Steel Nuts Size | M3 - M56 | 3/6" to 2" | Custom Sizes |
| 321 Stainless Steel Bolt / Screw Size | M3 - M56 | 3/6" to 2" | Custom Sizes |
| 321 Stainless Steel Machine Screws Size | M1.6 - M12 |
| 321 Stainless Steel Washers Size | M3 - M56 | 3/6" to 2" | Custom Sizes |
| Stainless Steel Grades | SS 321 |
| 321 Stainless Steel Fasteners Type | Nut, Hex Coupling Nut, Hex Nut, Square Nut, Hex Domed Cap Nuts, Hex Head Bolts, Stud Bolts, Socket Hexagon Head Screw, Pan Head Screw, Socket Head Cap Screw, Wing Screw, T-Head Bolts, Foundation Bolts,Screw, Studs, Socket Screw, Hex Set Screw, Cap Screw, Machine Screw, Wing Screw, Spring Washers, Washers, Studs, Marine Anchors, Anchors, Hexagon Nut,U- Bolts, Anchor Bolt, Mushroom Head Square Neck Bolts, J Bolts,Eye Bolt,Structural Bolts, Bolts, Nuts, Sockets, Screws, Allen Cap screw |
India’s Largest SS 321 Screws, SS 321 Bolts, 321 SS Stud Bolt Suppliers In Mumbai, India
321 Stainless Steel Hex Bolt Dimension

**All measurements in millimeters**
NOMINAL SIZE (D) | BODY DIAMETER | HEAD THICKNEASTM A193 | ACROASTM A193 THE FLATS | ACROASTM 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 |
321 Stainless Steel Nuts Size Chart
Nut Size (mm) | Diameter* (mm) | Height (mm) | ||
|---|---|---|---|---|
Hex Nut | Jam Nut | Nylock Nut | ||
2 | 4 | 1.6 | 1.2 | - |
2.5 | 5 | 2 | 1.6 | - |
3 | 5.5 | 2.4 | 1.8 | 4 |
4 | 7 | 3.2 | 2.2 | 5 |
5 | 8 | 4 | 2.7 | 5 |
6 | 10 | 5 | 3.2 | 6 |
7 | 11 | 5.5 | 3.5 | - |
8 | 13 | 6.5 | 4 | 8 |
10 | 17 | 8 | 5 | 10 |
12 | 19 | 10 | 6 | 12 |
14 | 22 | 11 | 7 | 14 |
16 | 24 | 13 | 8 | 16 |
18 | 27 | 15 | 9 | 18.5 |
20 | 30 | 16 | 10 | 20 |
* This is the diameter across the flats. It is also the size of wrench to use. | ||||


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" |

**All measurements in millimeters**
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 | 7/16 | .438 | .428 | .505 | .488 | 7/32 | .226 | .212 |
5/16 | .3125 | 1/2 | .500 | .489 | .577 | .557 | 17/64 | .273 | .258 |
3/8 | .3750 | 9/16 | .562 | .551 | .650 | .628 | 21/64 | .337 | .479 |
7/16 | .4375 | 11/16 | .688 | .675 | .794 | .768 | 3/8 | .385 | .365 |
1/2 | .5000 | 3/4 | .750 | .736 | .866 | .840 | 7/16 | .448 | .427 |
9/16 | .5625 | 7/8 | .875 | .861 | 1.010 | .982 | 31/64 | .496 | .473 |
5/8 | .6250 | 15/16 | .938 | .922 | 1.083 | 1.051 | 35/64 | .559 | .535 |
3/4 | .7500 | 1-1/8 | 1.125 | 1.088 | 1.299 | 1.240 | 41/64 | .665 | .617 |
7/8 | .8750 | 1-5/16 | 1.312 | 1.269 | 1.516 | 1.447 | 3/4 | .776 | .724 |
1 | 1.0000 | 1-1/2 | 1.500 | 1.450 | 1.732 | 1.653 | 55/64 | .887 | .831 |
1-1/8 | 1.1250 | 1-11/16 | 1.688 | 1.631 | 1.949 | 1.859 | 31/32 | .999 | .939 |
1-3/8 | 1.3750 | 2-1/16 | 2.062 | 1.994 | 2.382 | 2.273 | 1-11/64 | 1.206 | 1.138 |
1-1/2 | 1.500 | 2-1/4 | 2.250 | 2.175 | 2.598 | 2.480 | 1-9/32 | 1.ASTM A194 GR. 8 | 1.245 |
1-5/8 | 1.6250 | 2-7/16 | 2.438 | 2.356 | 2.815 | 2.686 | 1-25/64 | 1.429 | 1.353 |
1-3/4 | 1.7500 | 2-5/8 | 2.625 | 2.538 | 3.031 | 2.893 | 1-1/2 | 1.540 | 1.460 |
2 | 2.0000 | 3 | 3.000 | 2.900 | 3.464 | 3.306 | 1-23/32 | 1.763 | 1.675 |
2-1/4 | 2.2500 | 3-3/8 | 3.375 | 3.263 | 3.897 | 3.719 | 1-15/16 | 1.986 | 1.890 |
2-1/2 | 2.5000 | 3-3/4 | 3.750 | 3.625 | 4.330 | 4.133 | 2-5/32 | 2.209 | 2.105 |
2-3/4 | 2.7500 | 4-1/8 | 4.125 | 3.988 | 4.763 | 4.546 | 2-3/8 | 2.431 | 2.319 |
Bolt Size | USS | SAE | ||||
OD (in.) | ID (in.) | Thickness | OD (in.) | ID (in.) | Thickness | |
1/8 (#6) | - | - | - | 0.375 | 0.156 | .036/.065 |
5/32 (#8) | - | - | - | 0.438 | 0.188 | .036/.065 |
3/16 (#10) | 0.560 | 0.250 | .036/.065 | 0.500 | 0.220 | .036/.065 |
7/32 (#12) | - | - | - | 0.562 | 0.250 | .051/.080 |
1/4 (#14) | 0.734 | 0.312 | .051/.080 | 0.625 | 0.281 | .051/.080 |
5/16 | 0.875 | 0.375 | .064/.104 | 0.688 | 0.344 | .051/.080 |
3/8 | 1.000 | 0.438 | .064/.104 | 0.812 | 0.406 | .051/.080 |
7/16 | 1.250 | 0.500 | .064/.104 | 0.922 | 0.469 | .051/.080 |
1/2 | 1.375 | 0.562 | .086/.132 | 1.062 | 0.531 | .074/.121 |
9/16 | 1.469 | 0.625 | .086/.132 | 1.156 | 0.594 | .074/.121 |
5/8 | 1.750 | 0.688 | .108/.160 | 1.312 | 0.656 | .074/.121 |
3/4 | 2.000 | 0.812 | .122/.177 | 1.469 | 0.812 | .108/.160 |
7/8 | 2.250 | 0.938 | .136/.192 | 1.750 | 0.938 | .108/.160 |
1 | 2.500 | 1.062 | .136/.192 | 2.000 | 1.062 | .108/.160 |
1 1/8 | 2.750 | 1.250 | .136/.192 | 2.250 | 1.250 | .108/.160 |
1 1/4 | 3.000 | 1.375 | .136/.192 | 2.500 | 1.375 | .136/.192 |
1 3/8 | 3.250 | 1.500 | .153/.213 | 2.750 | 1.500 | .136/.213 |
1 1/2 | 3.500 | 1.625 | .153/.213 | 3.000 | 1.625 | .153/.213 |
1 5/8 | 3.750 | 1.750 | .153/.213 | - | - | - |
1 3/4 | 4.000 | 1.875 | .153/.213 | - | - | - |
1 7/8 | 4.250 | 2.000 | .153/.213 | - | - | - |
2 | 4.500 | 2.125 | .153/.213 | - | - | - |
2 1/4 | 4.750 | 2.375 | .320/.248 | - | - | - |
2 1/2 | 5.000 | 2.625 | .210/.280 | - | - | - |
2 3/4 | 5.250 | 2.875 | .228/.410S | - | - | - |
3 | 5.500 | 3.125 | .249/.327 | - | - | - |

Nominal | Thread. | Hex Socket Size | Body diameter and Head height | Head Dia | Soc. length | ||
Size | Pitch | Max | Min | Max | Min | ||
J | D /H | A | K | ||||
M3 | 0.5 | 2.50 | 3.00 | 2.86 | 5.50 | 5.20 | 1.3 |
M4 | 0.70 | 3.00 | 4.00 | 3.82 | 7.00 | 6.64 | 2.00 |
M5 | 0.8 | 4.00 | 5.00 | 4.82 | 8.50 | 8.14 | 2.70 |
M6 | 1.0 | 5.00 | 6.00 | 5.82 | 10.00 | 9.64 | 3.30 |
M8 | 1.25 | 6.00 | 8.00 | 7.78 | 13.00 | 12.57 | 4.3 |
M10 | 1.5 | 8.00 | 10.00 | 9.78 | 16.00 | 15.57 | 5.50 |
M12 | 1.75 | 10.00 | 12.00 | 11.73 | 18.00 | 17.57 | 6.60 |
M16 | 2.0 | 14.00 | 16.00 | 15.73 | 24.00 | 23.48 | 8.80 |
M20 | 2.5 | 17.00 | 20.00 | 19.67 | 30.00 | 29.48 | 10.70 |
M24 | 3.0 | 19.00 | 24.00 | 23.67 | 36.00 | 35.38 | 12.90 |

SS 321 Heavy Hex Bolts

SA193 SS 321 Hex Bolts

321 SS Lag Bolts

DIN 1.4541 SS Anchor Bolts

SS UNS S32100 Carriage Bolts

SUS321 Allen Cap Bolt

DIN 1.4541 SS Countersunk Bolts

AISI 321 Flange Bolts

SS 321 Square Bolts

321 SS Hex Head Bolts

ASME SA193 SS U Bolts

321 SS Eye Bolts

A193 SS 321 Stud Bolts

321 SS Double Ended Studs

321 SA193 SS Tie Bars

321 SS Threaded Rod

ASME SA193 321 SS Tie Rods

AISI 321 Acorn Nuts

SS UNS S32100 T Nuts

321 Stainless Steel Serrated Flange Nuts

321 Stainless Steel Nyloc Nuts

SA193 SS 321 Wing Nuts

AISI 321 Panel Nuts

A193 SS 321 Coupling Nuts

ASME SA193 321 SS Dome Nuts

UNS S32100 SS Square Nuts

321 SS Hex Head Nuts

A193 SS UNS S32100 Hex Nuts

ASME SA193 321 SS Eye Nuts

SA193 321 SS Heavy Hex Nuts

AISI 321 Lock Nut

Stainless Steel 321 Self Locking Nuts

321 Stainless Steel Nylon Insert Nuts

Stainless Steel UNS S32100 Ogee Washers

AISI 321 Stainless Steel Split Washers

SUS321 Stainless Steel Flat Washers

EN 1.4541 SS Star Washers

AISI 321H SS Dock Washers

SS 321 Belleville Washers

Stainless Steel 321 Fender Washer

SS 321 Countersunk Finishing Washer

321 Stainless Steel Square Washers

UNS S32100 SS Spring Washers

DIN 1.4541 Stainless Steel Lock Washers

ASME SA193 321 SS Spherical Washers

321 SS Socket Head Cap Screw

Grade 321 SS Wing Screw

DIN 1.4541 Stainless Steel Roofing Screw

SS Grade 321 Self Tapping Screw

A193 321 SS Eye Screw

Stainless Steel UNS S32100 Concrete Screw
SS 321 Thumb Screw

321 Stainless Steel Deck Screw

321 Stainless Steel Wood Screw

AISI 321 SS Coach Screw

UNS S32100 SS Countersuck Screw

DIN 1.4541 SS Lag Screw

Type 321 SS Self Drilling Screw

AISI 321 Stainless Steel Set Screw
Other Types Of 321 Stainless Steel Fasteners
Stainless Steel Fasteners | Stainless Steel Stud Bolts |
321 Stainless Steel Bolts and Nuts | AISI 321 Stainless Steel Anchor Bolts Stockist |
SUS321 Stainless Steel Hex Nuts Torque | 321 Stainless Steel Tower Bolts Wholesaler |
Stainless Steel 321 Hex Nuts | UNS 32100 Stainless Steel U Bolts Supplier |
DIN 1.4541 Stainless Steel Stud Strength | AISI 321 Stainless Steel Eye Bolt Manufacturer |
321 Stainless Steel Lock Nuts | SUS321 Stainless Steel Stove Bolts Exporter |
Stainless Steel 321 Tek Screw | 321 SS Roofing Screw |
UNS S32100 Stainless Steel Tie Bar | 321 Stainless Steel Threaded Rod |
ASME SA321 Stainless Steel Spherical Washer | AISI 321 SS Dock Washer |
321 Stainless Steel Star Washer | SS 321 Lock Washer |
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
321 | min. max. | - 0.080 | - 2 | - 1 | - 0.045 | - 0.030 | - 19 | - - | - 13 | - - |
Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
BS | En | No | Name | ||||
321 | S32100 | 321S31 | 58B, 58C | 1.4541 | X6CrNiTi18-10 | 2337 | SUS 321 |
Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
Rockwell B (HR B) max | Brinell (HB) max | ||||
321 | 515 MPa | 205 MPa | 40% | 95 | 217 |
Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100 °C (J/kg.K) | Electrical Resistivity (nΩ.m) | |||
|---|---|---|---|---|---|---|---|---|---|
0-100 °C | 0-315 °C | 0-538 °C | at 100 °C | at 500 °C | |||||
321 | 8027 | 193 | 16.6 | 17.2 | 18.6 | 16.1 | 22.2 | 500 | 720 |
- EN 1.4541 SS Set Screw uses in Heat Exchangers
- 321 SS Studs uses in Petrochemicals
- SUS321 Screws uses in Gas Processing
- SUS321 Bolts And Nuts uses in Pharmaceuticals
- 321 SS Threaded Rod uses in Sea Water Equipment
- UNS S32100 SS U Bolts uses in Spiral Welded tube for burner pipes and flues
- DIN 1.4541 Fasteners uses in Aircraft Exhaust Manifolds
- EN 1.4541 Nuts uses in Specialty Chemicals
- SS 321 Bolts uses in Off-Shore Oil Drilling Companies
- 321 Stainless Steel Fasteners uses in Pharmaceutical Equipment
- AISI 321 Flat Washer uses in Power Generation