Stainless Steel Screw/Bolts Nuts
What's a Screw Nut ?
The screw nut (commonly called a nut) is a type of fastener that is internally threaded and designed to mate with a bolt or screw to securely fasten components together. Nuts are widely used in machinery, construction, automotive, and electronics.
Materials Used for Nuts
Carbon Steel (Grade 4.8, 8.8, 10.9) - Strong and cost-effective;
Stainless Steel (SS304, SS316) - Corrosion-resistant, used in marine and food industries;
Brass & Copper - Conductive, used in electrical applications;
Nylon (Plastic Nuts) - Lightweight,non-conductive,corrosion-resistant;
Standard Nut Dimensions (Metric & Imperial)
Common Sizes (Metric): M3, M4, M5, M6, M8, M10, M12, M16, M20
Common Sizes (Imperial): ¼"-20, ⅜"-16, ½"-13, ¾"-10
Thread Types: Coarse Thread (UNC), Fine Thread (UNF), Metric (ISO)
| Common Types of Nuts |
| Nut Type |
Description |
Application |
| Hex Nut |
Six-sided standard nut |
General machinery, construction |
| Lock Nut |
Prevents loosening due to vibrations |
Automotive, aerospace, heavy machinery |
| Flange Nut |
Integrated washer to distribute load |
Automotive, sheet metal assemblies |
| Wing Nut |
Hand-tightened with fingers (no tools) |
Temporary assemblies, electrical panels |
| Cap Nut (Dome Nut) |
Covers the bolt end for safety |
Decorative finishes, industrial machinery |
| T-Nut |
Embedded into wood or plastic for flush fitting |
Furniture, woodworking |
| Square Nut |
Four-sided nut for better grip |
Historical machinery, special fastenings |
| Cage Nut |
Encased in a spring steel cage |
Server racks, electronic enclosures |
| Rivet Nut (Nutsert) |
Used where tapping threads is not possible |
Thin sheet metal, aircraft, automotive |
| Weld Nut |
Designed to be welded to metal surfaces |
Automotive, heavy equipment |
| Stainless Steel Hex Nut Dimensions (DIN 934, ISO 4032) |
| Size (M) |
Thread Pitch (mm) |
Width Across Flats (S) mm |
Width Across Corners (e) mm |
Height (H) mm |
Weight per 100 pcs (kg) |
| M3 |
0.5 |
5.5 |
6.01 |
2.4 |
0.06 |
| M4 |
0.7 |
7 |
7.66 |
3.2 |
0.11 |
| M5 |
0.8 |
8 |
8.79 |
4 |
0.18 |
| M6 |
1 |
10 |
11.05 |
5 |
0.34 |
| M8 |
1.25 |
13 |
14.38 |
6.5 |
0.71 |
| M10 |
1.5 |
17 |
18.9 |
8 |
1.45 |
| M12 |
1.75 |
19 |
21.1 |
10 |
2.26 |
| M16 |
2 |
24 |
26.75 |
13 |
5.2 |
| M20 |
2.5 |
30 |
33.53 |
16 |
9.8 |
| Strength & Mechanical Properties (A2-70 / A4-80 Stainless Steel) |
| Property |
A2-70 (SS304) |
A4-70 (SS316) |
A4-80 (SS316) |
| Tensile Strength (MPa) |
700 |
700 |
800 |
| Yield Strength (MPa) |
450 |
450 |
600 |
| Hardness (HV) |
150-320 |
150-320 |
200-320 |
| Corrosion Resistance |
Good |
Excellent |
Excellent (Chloride-resistant) |
| SS304 (A2-70): Used for general applications with moderate corrosion resistance. |
| SS316 (A4-70, A4-80): Ideal for marine, chemical, and food processing industries due to superior corrosion resistance. |
THE APPLICATIONS:
| Bolt Type |
Description |
Common Applications |
| Hex Bolt |
Standard bolt with hexagonal head |
General construction,machinery |
| Anchor Bolt |
Embedded in concrete for heavy loads |
Structural foundations,bridges |
| Carriage Bolt |
Rounded head with square neck |
Woodworking,furniture,decks |
| Flange Bolt |
Built-in washer distributes load |
Automotive,pipelines |
| U-Bolt |
U-shaped for clamping pipes |
Plumbing,exhaust systems |
| Eye Bolt |
Circular ring for lifting loads |
Cranes,lifting,rigging |
| Shoulder Bolt |
Precise spacing with cylindrical shoulder |
Robotics,mechanical parts |
Key Applications of Screw Bolts
1.Automotive & Aerospace Industry
Used in engine components,chassis,suspension,and braking systems.
High-strength Grade 8.8,10.9,and 12.9 bolts ensure durability under stress.
Stainless steel (SS316) bolts are used in exhaust systems for corrosion resistance.
Aerospace applications require titanium and Inconel bolts for high temperature and lightweight properties.
*Common Bolts Used: Hex Bolts,Flange Bolts,U-Bolts,Stud Bolts,Aerospace Bolts
2.Construction & Infrastructure
Used in steel structures,bridges,and high-rise buildings.
Heavy-duty bolts (ASTM A325,A490) provide high tensile strength.
Anchor bolts secure foundations,columns,and equipment to concrete.
Expansion bolts and sleeve anchors are used for masonry and concrete applications.
*Common Bolts Used: Anchor Bolts,Structural Bolts,Expansion Bolts,Carriage Bolts
3.Machinery & Industrial Equipment
Essential in manufacturing plants,CNC machines,and heavy equipment.
Used to assemble gearboxes,motors,pumps,and compressors.
High-temperature bolts (A286,Hastelloy) are used in boilers and turbines.
Locking nuts (Nyloc,Prevailing Torque) prevent loosening due to vibrations.
*Common Bolts Used: Hex Bolts,Eye Bolts,Shoulder Bolts,Allen (Socket) Bolts
4.Marine & Offshore Industry
Stainless steel (SS316 & SS316L) and Monel bolts resist saltwater corrosion.
Used in shipbuilding,offshore platforms,and underwater equipment.
Bolts in subsea applications must withstand high pressure and temperature.
*Common Bolts Used: Stainless Steel Hex Bolts,Eye Bolts,Marine-Grade Bolts
5.Electrical & Electronics Industry
Used in junction boxes,switchgear panels,and electronic enclosures.
Brass and nylon bolts are used where electrical conductivity or insulation is needed.
High-precision small bolts (M2,M3) are used in PCB mounting and circuit boards.
*Common Bolts Used: Machine Screws,Captive Screws,Thumb Screws,Brass Bolts
6.Furniture & Woodworking
Used for assembling chairs,tables,beds,and cabinets.
Carriage bolts are popular in woodworking due to their flat,smooth heads.
Confirmat screws are used in particleboard and MDF panels.
*Common Bolts Used: Carriage Bolts,Lag Bolts,Wood Screws,T-Nuts
7.Railways & Transportation
Heavy-duty bolts secure rail tracks,train components,and metro systems.
High-strength bolts (Grade 10.9,12.9) withstand dynamic loads and vibrations.
Huck bolts are used for permanent fastening in train assembly.
Precision: Commitment to delivering precision-engineered components that meet or exceed customer expectations.
Innovation: Embracing technological advancements to continuously improve our processes and products.
Integrity: Upholding ethical standards in all business practices, fostering trust and long-term partnerships with our clients.
Custom Manufacturing: Tailored solutions to meet unique specifications and application requirements.
Prototyping: Rapid prototyping capabilities to facilitate product development and testing.
Surface Finishing: Comprehensive surface treatment options including polishing, anodizing, and plating to enhance aesthetics and functionality.
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What's a Screw Nut ?
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