Fasteners
What are Fasteners?
Fasteners are mechanical devices used to join or affix two or more objects together, providing structural integrity and load-bearing capability in various assemblies. They are essential in virtually every industry, from construction and automotive to electronics and aerospace, offering quick, reliable, and often removable connections.
Fasteners come in multiple materials such as carbon steel, alloy steel, brass, copper, aluminum, and stainless steel, and are designed in numerous forms including nuts, bolts, screws, washers, studs, and anchors to suit diverse mechanical requirements.
Key Features
Leak-Proof
Jointing
Durable
Construction
Easy Installation
& Removal
Wide
Compatibility
Corrosion
Resistant
Specifications
| Parameter | Specification / Details |
|---|---|
| Sizes Available | M3 to M100 (custom sizes available on request); fractional and standard inch sizes for UNC/UNF fasteners. Lengths: 6mm – 500mm. |
| Thread Types | Metric (M), UNC (Unified Coarse), UNF (Unified Fine), BSW (British Standard Whitworth), BSF (British Standard Fine); also trapezoidal and ACME threads on request. |
| Head / Drive Types | Hex Head, Socket Head, Pan Head, Countersunk, Button Head, Flange Head, Slotted, Phillips, Torx, Square Drive, Allen. |
| Manufacturing Methods | Cold Forged – high strength, precise dimensions. Hot Forged – high toughness, heavy-duty use. CNC Machined – precision tolerance, custom shapes. |
| Material Options | Carbon Steel – moderate strength, cost-effective. Alloy Steel – high strength, mechanical performance. Brass – corrosion-resistant, decorative. Copper – corrosion-resistant, conductive. Aluminum – lightweight, corrosion-resistant. Stainless Steel – grades 304, 316, 321, 410, 420, 430; excellent corrosion resistance. |
| Standards / Grades | DIN, ASTM, ASME, ISO, JIS, BS; tensile grades such as A2-70, A4-80, 8.8, 10.9, 12.9. |
| Finish / Coating Options | Zinc Plated, Galvanized (Hot-dip / Electro), Black Oxide, Dacromet, Phosphate Coated, Polished, Passivated (for stainless steel). |
| Mechanical Properties | Tensile Strength: 500–1200 MPa depending on material/grade. Hardness: HRC 20–40 (varies by material). Corrosion Resistance: High for stainless steel and coated finishes. |
Nuts Technical Specifications
| Nuts Type | Size | Property Class | Standard |
|---|---|---|---|
| Hex Nut | M6 to M42 | 10 | ISO 4032 |
| Nylock Nut | M6 to M20 (Gr.8) / M10 to M24 (Gr.10) | 8 & 10 | DIN 982 / 985 |
| Flange Nut | M6 to M20 | 8 / 10 | DIN 6923 |
| Weld Nut | M6 to M12 | 8 | DIN 929 |
| Eye Nut | M6 to M36 | – | DIN 582 |
Bolt Technical Specifications
| Bolt Type | Size | Property Class | Tensile Strength | Standard |
|---|---|---|---|---|
| Hex Head Bolt | M4 to M80 | 10.9 | 1040 N/mm² (min) | ISO 4017 (Full Thread), ISO 4014 (Half Thread) |
| Hex Bolt | M6 to M64 | 8.8, 10.9, 12.9 | 800 – 1220 N/mm² | DIN 933, DIN 931 |
| U Bolt | M6 to M36 | 4.6, 8.8 | 400 – 800 N/mm² | DIN 3570, IS 1364 |
| Eye Bolt | M6 to M42 | 4.6, 8.8 | 400 – 800 N/mm² | DIN 580, IS 4190 |
| J Bolt | M6 to M36 | 4.6, 8.8 | 400 – 800 N/mm² | IS 5624, Custom Standards |
| T Bolt | M8 to M48 | 8.8, 10.9 | 800 – 1040 N/mm² | DIN 7992, IS 1367 |
| Foundation Bolt | M12 to M100 | 4.6, 8.8 | 400 – 800 N/mm² | IS 5624, IS 1367, Custom Standards |
| Structural Bolt | M12 to M36 | 8.8, 10.9 | 830 – 1040 N/mm² | ASTM A325, ASTM A490, IS 3757 |
Screws Technical Specifications
| Screws Type | Size | Grade / Property | ASME | ISO | ASTM |
|---|---|---|---|---|---|
| Allen Cap Screw | M1.6 to M64 | 12.9 | B18.3.1M | 4762 | A574M |
| Allen CSK Screw | M3 to M20 | 12.9 | B18.3.5M | 10642 | F835M |
| Button Head Screw | M3 to M12 | 12.9 | B18.3.4M | 7380 | F835M |
| Allen Grub Screw (Set) | M3 to M20 | 45H | B18.3.6M | 4029 | F912M |
| Cheese Head Screw | M2 to M12 | 4.8 / 8.8 | B18.6.3 | 1207 | – |
| CSK Head Screw | M2 to M12 | 4.8 / 8.8 | B18.6.3 | 2009 | – |
| Pan Philips Screw | M2 to M12 | 4.8 / 8.8 | B18.6.3 | 7045 | – |
| CSK Philips Screw | M2 to M12 | 4.8 / 8.8 | B18.6.3 | 7046 | – |
| Pan Slotted Screw | 2.2mm to 6.3mm | Case Hardened | B18.6.4 | 1481 | – |
| CSK Slotted Screw | 2.2mm to 6.3mm | Case Hardened | B18.6.4 | 7050 | – |
| Pan Philips Screw | 2.2mm to 6.3mm | Case Hardened | B18.6.4 | 7049 | – |
| CSK Philips Wood Screw | 2.2mm to 6.3mm | Case Hardened | B18.6.1 | 7051 | – |
Washer Technical Specifications
| Washer Type | Size Range | Hardness | Standard |
|---|---|---|---|
| Flat Washer | 3mm to 56mm | HV (100 to 250) | ISO 7089 / IS 5369 |
| Plain Washer | 3mm to 56mm | HV (100 to 250) | DIN 125 / ISO 7090 |
| Spring Washer | 3mm to 39mm | HV (430 to 530) | DIN 127 / IS 6735 |
| Square Section Spring Washer | 3mm to 39mm | HV (430 to 530) | DIN 7980 |
| Flat Section Spring Washer | 3mm to 39mm | HV (430 to 530) | DIN 127 B |
Metric Size Table
| 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 |
Applications of Fasteners
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What factors should I consider when selecting a fastener?
Can I order fasteners in custom sizes or special finishes?
Are your fasteners certified to meet international quality standards?
Do you supply fasteners globally?
