Repute Steel & Engineering Company supplies a comprehensive range of SS 904L Fasteners, including bolts, nuts, screws, studs, and DIN 1.4539 Threaded Rods, at competitive factory prices in India. Designed for high-temperature and high-pressure applications, these fasteners are manufactured under the stringent requirements of ASTM A193, ensuring consistent quality and performance. The specification strictly prohibits the use of any non-specified elements, guaranteeing the purity and reliability of the alloy.
Grade 904L is a highly alloyed, non-stabilized, and non-magnetic austenitic stainless steel. The addition of copper to the alloy significantly enhances its resistance to strong reducing acids, such as sulfuric acid. Unlike standard grades like 316, 904L Stainless Steel Fasteners excel in environments exposed to aggressive chemicals, offering superior durability. Properties such as stress corrosion cracking and crevice corrosion resistance are further enhanced by the high nickel content in the alloy's composition, making it ideal for critical and demanding applications.
To maximize their performance, SS 904L Studs are often solution-treated after cold working, improving their resistance to stress corrosion cracking in aggressive environments. This alloy is highly versatile, offering excellent resistance to decay from reducing agents in both harsh and mild conditions. Repute Steel & Engineering Company ensures that all ASTM A193 UNS N08904 Fasteners meet the highest standards of quality, making them the preferred choice for industries such as chemical processing, petrochemicals, and marine applications. Contact us for high-performance 904L fasteners at the best prices in the market.
904L Bolts Nuts Specification
| Fasteners Material Specification | ASTM A 193/ASME SA 193, UNS 8904 Bolts |
|---|---|
| Standard | JIS, BS, IS, ASME, ANSI, ISO, GB, ASTM, DIN, UNI |
| Fasteners/ Bolts Size | M3, M16, M30, M36, M6, M12, M24, M10, M2.5, M20, M5, M2, M14, M4, M8, to M160 |
| Length | 3 to 200 mm |
| Bolts, Studs Threads: | UNC, METRIC, BSW, UNF, BSF, or as required |
| Fasteners Standard: | ANSI – American National Standards Institute
UTS – Unified Thread Standard : UNC, UNF, UNEF, UNS, NPT, NPTF DIN: DIN 934, DIN 933, DIN 931, DIN 970 ISO : ISO 4033, ISO 4032, JIS standards |
| Source of raw materials | Mukund Steel, JSPL, RINL, Dhamm Steel,Tata Steel, Usha Martinetc. |
| Fasteners In Form of: | Square, Hex, Threading, Round Etc. |
| Head drive: | Slotted, Phillips, Six-Lobeetc |
| Production process | hot forging M24 to M100, machining and CNC , M2 to M24: Cold Froging, |
| bolting materials Coating: |
All surface finishes offered including Galvanised, Zinc, Sherardized, PTFE & Geomet , Electroless Nickel, Dacromet |
| bolting Test Certificate: | EN 10204 / 3.1 |
| Fasteners Packing: | IN BULK: pallet, canton, carton / Small Boxs / pallet, or custom |
904L Stainless Steel Fasteners Sizes
|
Screws Type
|
ASME
|
SIZE
|
ISO
|
ASTM
|
|---|---|---|---|---|
|
Socket Head Cap Screws
|
B18.3.1 M
|
M1.6 to M64
|
4762
|
A574M
|
|
Flat Point Socket Set Screws
|
B18.3.6M
|
M6 to M12
|
4026
|
F912M
|
|
Countersunk Socket Head Screws
|
B18.3.5M
|
M3 to M20
|
10642
|
F835M
|
|
Cone Point Socket Set Screws
|
B18.3.6M
|
M3 to M12
|
4027
|
F912M
|
|
Socket Low Head Cap Screws
|
|
M4 to M20
|
|
|
|
Button Head Socket Screws
|
B18.3.4M
|
M3 to M12
|
7380
|
F835M
|
|
Knurled Point Socket Set Screws
|
B18.3.6M
|
M3 to M20
|
4029
|
F912M
|
|
Socket Head Shoulder Screws
|
B18.3.3M
|
M6 to M24
|
|
|
|
Plain Point Socket Set Screws
|
B18.3.6M
|
M3 to M20
|
4029
|
F912M
|
|
Flange Button Head Socket Screws
|
|
M3 to M10
|
|
F835M
|
|
Taper Pressure Plug
|
|
M8 to M22
|
|
|
|
Dog Point Socket Set Screws
|
B18.3.6M
|
M3 to M20
|
4028
|
F912M
|
|
904L Stainless Steel Washers Type
|
HARDNESS
|
SIZE
|
STANDARD
|
|---|---|---|---|
|
Square Section Spring Washer
|
HV (430 to 530)
|
3mm to 39mm
|
DIN 7980
|
|
Flat Section Spring Washer
|
HV (430 to 530)
|
3mm to 39mm
|
DIN 127 B
|
|
Hardened Washer
|
HV (300 to 370)
|
12mm to 30mm
|
IS 2016
|
|
Hardened Steel Washer
|
Rockwell 26 to 45 (HDG)
Rockwell 38 to 45 (Coated) |
12mm to 56mm
|
ASTM F436M
|
Below table compares various metric sizes to the closest inch equivalent
| Closest Inch | Metric |
|---|---|
| 1 to 64 (Smaller) | M2 to 0.04 |
| 0 to 80 (Larger) | M1.04 to 0.03 |
| 4 to 48 (Smaller) | M3 to 0.05 |
| 3 to 56 (Larger) | M2.05 to 0.045 |
| 1 3/8 to 6 (Smaller) | M36 to 4.00 |
| 6 to 40 (Same) | M3.05 to 0.06 |
| 10 to 32 (Smaller) | M5 to 0.08 |
| 8 to 36 (Larger) | M4 to 0.07 |
| 1/4 to 28 (Larger) | M6 to 1.00 |
| 5/16 to 18 (Smaller) | M8 to 1.025 |
| 1/4 to 28 (Smaller) | M7 to 1.00 |
| 3/8 to 16 (Smaller) | M10 to 1.05 |
| 9/16 to 12 (Larger) | M14 to 2.00 |
| 1/2 to 13 (Larger) | M12 to 1.075 |
| 5/8 to 11 (Smaller) | M16 to 2.00 |
| 3/4 to 10 (Smaller) | M20 to 2.05 |
| 3/4 to 10 (Larger) | M18 to 2.05 |
| 1 to 8 (Larger) | M24 to 3.00 |
| 7/8 to 9 (Larger) | M22 to 2.05 |
| 1 1/8 to 7 (Smaller) | M30 to 3.05 |
DIN and ISO designations
|
No.
|
Description
|
|---|---|
|
DIN 85
|
Slotted Pan Head Machine Screws
|
|
DIN 127B
|
Split Lock Washer
|
|
DIN 137B
|
Spring Wave Washer
|
|
DIN 125B
|
with Chamfer Flat Washer
|
|
DIN 315
|
Wing Nut
|
|
DIN 94
|
Cotter Pin
|
|
DIN 911
|
Long Arm Hex Key
|
|
DIN 439B
|
Machine Screws Finished Hex Jam Nut and Hex Nut
|
|
DIN 912
|
Hex Socket Head Cap Screws
|
|
DIN 125A
|
without Chamfer Flat Washer
|
|
DIN 931
|
Partially Threaded Hex Head Cap Screws
|
|
DIN 916
|
Hex Socket Set Screws
|
|
DIN 933
|
Fully Threaded Hex Head Cap Screws
|
|
DIN 939
|
Double End Stud
|
|
DIN 934
|
Finished Hex Nut
|
|
DIN 966
|
Phillips Oval Head Machine Screws
|
|
DIN 960
|
Partially Threaded Hex Head Cap Screws
|
|
DIN 84
|
Slotted Cheese Head Machine Screws
|
|
DIN 963
|
Slotted Flat Head Machine Screws
|
|
DIN 961
|
Fully Threaded Hex Head Cap Screws
|
|
ISO 7380
|
Hex Button Socket Head Cap Screws
|
|
DIN 964
|
Slotted Oval Head Machine Screws
|
|
DIN 965
|
Phillips Flat Head Machine Screws
|
|
DIN 985
|
Hex Nylon Insert Lock Nut
|
|
DIN 980V
|
Hex Steel Prevailing Torque Lock Nut
|
|
DIN 6334
|
Rod Coupling Nut
|
|
DIN 6797J
|
Internal Tooth Lock Washer
|
|
DIN 6797A
|
External Tooth Lock Washer
|
|
DIN 6912
|
Hex Low Socket Head Cap Screws
|
|
DIN 6923
|
Hex Flange Nut
|
|
DIN 6921
|
Hex Flange Head Screws
|
|
ISO 7379
|
Hex Socket Head Shoulder Screws
|
|
DIN 975
|
Threaded Rod
|
|
DIN 7985
|
Phillips Pan Head Machine Screws
|
|
DIN 7991
|
Hex Flat Socket Head Cap Screws
|