Repute Steel & Engineering Company offers an extensive range of Alloy 20 Stainless Steel Fasteners, including bolts, nuts, studs, threaded rods, and washers, at competitive prices in India. Specializing in the supply of UNS N08020 Threaded Rod, Hex Bolts, and Washers, the company serves industries requiring reliable solutions for corrosive environments. Alloy 20, also known as Carpenter 20, was specifically developed to resist acidic solutions, particularly sulfuric acid, where conventional austenitic stainless steels like grades 304 and 316 often fail due to corrosion.
The alloy's superior corrosion resistance stems from its high nickel and chromium content, further enhanced by the inclusion of copper and molybdenum. These elements provide exceptional resistance to pitting and chlorine-induced damage, outperforming grade 304 and rivaling the performance of grade 316. This makes Alloy 20 an excellent choice for chemical processing, marine applications, and industries exposed to harsh environments.
Additionally, Carpenter 20 Nuts offer excellent mechanical properties and weldability, thanks to their stabilized composition with low carbon and niobium. These features minimize carbide precipitation during welding, ensuring longevity and structural integrity. Known as a superalloy, Alloy 20 Fasteners provide outstanding resistance to general and crevice corrosion in the presence of aggressive chemicals like sulfuric acid, phosphoric acid, and nitric acid. Contact Repute Steel & Engineering Company for premium quality Alloy 20 fasteners designed for performance and durability in challenging conditions.
Carpenter 20 Fasteners Specification
| Fasteners Material Specification | ASTM / ASME SB 472, UNS 8020 Bolts |
|---|---|
| Standard | DIN, UNI, ISO, JIS, GB, IS, BS, ASME, ANSI, ASTM and all International Standards |
| Fasteners/ Bolts Size | M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M14, M16, M20, M24, M30, M36 to M160 |
| Length | 3 mm to 200 mm |
| Bolts, Studs Threads: | METRIC, BSW, BSF, UNC, UNF or as required |
| Fasteners Standard: | ANSI – American National Standards Institute
DIN: DIN 931, DIN 933, DIN 934, DIN 970 UTS – Unified Thread Standard : UNC, UNF, UNEF, UNS, NPT, NPTF ISO – International Organization for Standardization : ISO 4032, ISO 4033, JIS standards |
| Source of raw materials | Tata Steel, JSPL, RINL, Usha Martin, Dhamm Steel, Mukund Steel etc. |
| SCOPE OF MANUFACTURE |
|
| Fasteners In Form of: | Hex, Square, Round, Threading as per Gauge Etc. |
| Head drive: | Phillips, Slotted, Phillips/Slot, Six-Lobe, etc |
| bolting Test Certificate: | Manufacturer Test Certificate as per EN 10204 / 3.1 |
| Fasteners finishing: | Zinc (yellow, white, blue, black), black oxide, Geometry, Dacroment, anodizing, nickel plated, plated zinc-nickel, Stainless steel: Passivated Self-Colour, Hot Dip Galvanised (HDG), Bright Zinc Plated (BZP), Sherardized, Stainless Steel, Mechanically Applied coating and some special one like DACROMET |
| Production process | M2-M24: Cold Froging, hot forging M24-M100, machining and CNC for Customized connecting element |
| bolting materials Surface Coating: |
All surface finishes offered including Geomet & PTFE, Galvanised, Zinc, Electroless Nickel, Sherardized, Dacromet |
| Popular Types of Bolts | Hex Bolts, Flange Bolts, Hex Head Bolts, Lag Bolts, Square Bolts, Eye Bolts, U Bolts, T Bolts, Counter sunk Bolts etc. |
| Popular Types of Nut | Hex Head Nut, Eye Nut, Dome Nut, Wing Nut, T Nut, Panel Nut, Lock Nut, Coupling Nut, Square Nut, Acorn Nut etc. |
| Popular Types of Screw | Hex Head Cap Screws, Socket Set Screws, Anchor Screws, Blind Rivet, Socket Head Screws, Concrete Screws, Shoulder Screws, Panel Screws, Threaded Screws, Machine Screws etc. |
| Popular Types of Washer | Machine Washers, Flat Washer, Star Washers, Sealing Washer, Lock Washer, Split Washer etc. |
| Fasteners Packing: | IN BULK: canton, pallet, Small Boxs / carton / pallet, or customer request |
Alloy 20 Fasteners Sizes
|
Screws Type
|
SIZE
|
GRADE
|
ASME
|
ISO
|
ASTM
|
|---|---|---|---|---|---|
|
Socket Head Cap Screws
|
M1.6 to M64
|
12.9
|
B18.3.1 M
|
4762
|
A574M
|
|
Socket Low Head Cap Screws
|
M4 to M20
|
10.9
|
|
|
|
|
Socket Head Shoulder Screws
|
M6 to M24
|
012.9
|
B18.3.3M
|
|
|
|
Countersunk Socket Head Screws
|
M3 to M20
|
012.9
|
B18.3.5M
|
10642
|
F835M
|
|
Button Head Socket Screws
|
M3 to M12
|
012.9
|
B18.3.4M
|
7380
|
F835M
|
|
Flange Button Head Socket Screws
|
M3 to M10
|
012.9
|
|
|
F835M
|
|
Knurled Point Socket Set Screws
|
M3 to M20
|
45H
|
B18.3.6M
|
4029
|
F912M
|
|
Flat Point Socket Set Screws
|
M6 to M12
|
45H
|
B18.3.6M
|
4026
|
F912M
|
|
Dog Point Socket Set Screws
|
M3 to M20
|
45H
|
B18.3.6M
|
4028
|
F912M
|
|
Cone Point Socket Set Screws
|
M3 to M12
|
45H
|
B18.3.6M
|
4027
|
F912M
|
|
Plain Point Socket Set Screws
|
M3 to M20
|
45H
|
B18.3.6M
|
4029
|
F912M
|
|
Taper Pressure Plug
|
M8 to M22
|
–
|
|
|
|
Below table compares various metric sizes to the closest inch equivalent
|
Metric
|
Closest Inch
|
|---|---|
|
M1.4-0.3
|
0-80 (Larger)
|
|
M2-0.4
|
1-64 (Smaller)
|
|
M2.5-0.45
|
3-56 (Larger)
|
|
M3-0.5
|
4-48 (Smaller)
|
|
M3.5-0.6
|
6-40 (Same)
|
|
M4-0.7
|
8-36 (Larger)
|
|
M5-0.8
|
10-32 (Smaller)
|
|
M6-1.0
|
1/4-28 (Larger)
|
|
M7-1.0
|
1/4-28 (Smaller)
|
|
M8-1.25
|
5/16-18 (Smaller)
|
|
M10-1.5
|
3/8-16 (Smaller)
|
|
M12-1.75
|
1/2-13 (Larger)
|
|
M14-2.0
|
9/16-12 (Larger)
|
|
M16-2.0
|
5/8-11 (Smaller)
|
|
M18-2.5
|
3/4-10 (Larger)
|
|
M20-2.5
|
3/4-10 (Smaller)
|
|
M22-2.5
|
7/8-9 (Larger)
|
|
M24-3.0
|
1-8 (Larger)
|
|
M30-3.5
|
1 1/8-7 (Smaller)
|
|
M36-4.0
|
1 3/8-6 (Smaller)
|
DIN and ISO designations
|
No.
|
Description
|
|---|---|
|
DIN 84
|
Slotted Cheese Head Machine Screws
|
|
DIN 85
|
Slotted Pan Head Machine Screws
|
|
DIN 94
|
Cotter Pin
|
|
DIN 125A
|
Flat Washer (without Chamfer)
|
|
DIN 125B
|
Flat Washer (with Chamfer)
|
|
DIN 127B
|
Split Lock Washer
|
|
DIN 137B
|
Spring Wave Washer
|
|
DIN 315
|
Wing Nut
|
|
DIN 439B
|
Machine Screws Hex Nut, Finished Hex Jam Nut
|
|
DIN 911
|
Long Arm Hex Key
|
|
DIN 912
|
Hex Socket Head Cap Screws
|
|
DIN 916
|
Hex Socket Set Screws
|
|
DIN 931
|
Hex Head Cap Screws Partially Threaded
|
|
DIN 933
|
Hex Head Cap Screws Fully Threaded
|
|
DIN 934
|
Finished Hex Nut
|
|
DIN 939
|
Double End Stud
|
|
DIN 960
|
Hex Head Cap Screws Partially Threaded
|
|
DIN 961
|
Hex Head Cap Screws Fully Threaded
|
|
DIN 963
|
Slotted Flat Head Machine Screws
|
|
DIN 964
|
Slotted Oval Head Machine Screws
|
|
DIN 965
|
Phillips Flat Head Machine Screws
|
|
DIN 966
|
Phillips Oval Head Machine Screws
|
|
DIN 975
|
Threaded Rod
|
|
DIN 980V
|
Hex Steel Prevailing Torque Lock Nut
|
|
DIN 985
|
Hex Nylon Insert Lock Nut
|
|
DIN 6334
|
Rod Coupling Nut
|
|
DIN 6797A
|
External Tooth Lock Washer
|
|
DIN 6797J
|
Internal Tooth Lock Washer
|
|
DIN 6912
|
Hex Low Socket Head Cap Screws
|
|
DIN 6921
|
Hex Flange Head Screws
|
|
DIN 6923
|
Hex Flange Nut
|
|
ISO 7379
|
Hex Socket Head Shoulder Screws
|
|
ISO 7380
|
Hex Button Socket Head Cap Screws
|
|
DIN 7985
|
Phillips Pan Head Machine Screws
|
|
DIN 7991
|
Hex Flat Socket Head Cap Screws
|