| Size | M3 to M100 |
|---|---|
| Type | Bolt, Threaded Rod, Studs, Coated |
| Standard | Din, Iso, Jis, Gb, Is, Bs, Astm |
| Length | 1/8″, 4″ |
| Material | Stainless Steel, Monel, Phosphor Bronze, Inconel, Incoloy, Hastelloy, Nickel, Silicon Bronze |
Square Bolts Manufacturer – ASTM A193
Designed to work reliably in mechanical loads and where the environment is hostile, Square Bolts provide certain fastening and structural integrity in the most demanding jobs. Their strong building renders them to be used in projects with vibration, heavy loads as well as repetition. Shoulder Bolts are commonly used as a secondary fastener when high accuracy and constrained movement is needed between assemblies and when it is necessary to maintain a certain level of spacing between parts during assembly; this is to ensure the other components are fastened in the most effective way. These fastening solutions combined will result in reliable operation, lower maintenance needs and extended service life of industrial, mechanical and structural installations.
Square Bolts – Technical & Material Specification Table
Material | Grade / Standard | Bolt Type | Shank Diameter (mm) | Head Size (mm × mm) | Length Range (mm) | Thread Type | Surface Finish | Approx. Weight (kg/100 pcs) |
|---|---|---|---|---|---|---|---|---|
| Carbon Steel | ASTM A307 Gr A | Square Head Bolt | 10 | 16 × 16 | 30–150 | Metric / UNC | Black | 8.2 |
| Carbon Steel | IS 1363 | Square Head Bolt | 16 | 24 × 24 | 40–200 | Metric | Hot Dip Galvanized | 19.6 |
| Alloy Steel | ASTM A193 B7 | Square Head Bolt | 20 | 30 × 30 | 50–250 | UNC | Plain | 36.4 |
| Stainless Steel | ASTM F593 304 | Square Head Bolt | 12 | 19 × 19 | 35–180 | Metric | Plain | 12.1 |
| Stainless Steel | ASTM F593 316 | Square Head Bolt | 24 | 36 × 36 | 60–300 | Metric | Plain | 68.9 |
- Usage Area: Usage Structural joints, heavy equipment bases, steel structures: This type of fastening is mostly used in structural joints, heavy machinery bases, and steel structures in which hard seating and resistance to rotation are needed during tightening
- Quality in Manufacturing: Made with square heads of proper shape giving it more wrench grip and distribution of the load, which minimizes chances of slippage at high tightening force.
- Material /Grades: It comes in Mild steel, Carbon steel and Alloy steel grades with options of IS1364, ASTM A307 and ASTM A325 grade depending on the load carrying.
- Other Attributes: The square head style is also very appropriate in maintenance intensive environments because it is easy to loosen despite years of service or corrosion of the surface.
Key Features & Advantages
- Four-sided head provides a firm tool-gripping surface
- Good torque transmission during installation
- Accurate threading for secure nut engagement
- Stainless steel options provide excellent corrosion resistance
- High-strength grades are suitable for demanding applications
- Available in multiple diameters, lengths, and thread configurations
- Customized grades, coatings, and finishes available
Chemical Composition
Representative Grade: Stainless Steel 304
| Element | Percentage (%) |
|---|---|
| Chromium (Cr) | 18.0–20.0 |
| Nickel (Ni) | 8.0–10.5 |
| Manganese (Mn) | 2.00 max. |
| Carbon (C) | 0.080 max. |
| Silicon (Si) | 1.00 max. |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa min. |
| Yield Strength | 205 MPa min. |
| Elongation | 40% min. |
| Hardness | 92 HRB max. |
Equivalent Grade
| Standard | Grade |
|---|---|
| ASTM | F593 Type 304 |
| UNS | S30400 |
| EN | 1.4301 |
| DIN | X5CrNi18-10 |
Type of Sub-products
Frequently Asked Questions
What specifications are available for Stainless Steel Square Bolts?
How do I select the right Stainless Steel Square Bolts?
Are Stainless Steel Square Bolts suitable for corrosive environments?
Where are Stainless Steel Square Bolts commonly used?
Can I order Stainless Steel Square Bolts in bulk?
How can I request a quotation for Stainless Steel Square Bolts?
Countries We Export
India
Cities We Supply
Bangalore Urban
Hyderabad
Jaipur
Kalyan
Rampura
Sion, Mumbai
Surat
Thane
Gandhinagar
Rajahmundry
Panipat
Ahmadnagar
Ahmadpur
Bangalore Rural
Chandigarh
Chennai
Coimbatore
Haridwar
Jodhpur
Kolhapur
Mumbai
Murud (raigad)
Navi Mumbai
New Delhi
Rudrapur
Hosdurg
Durgapur
Ahmedabad
Jodhpur (ahmedabad)
Kolkata
Mumbai Suburban
Nashik
Raipur
Rajkot
Varanasi
Visakhapatnam
Angul
Bengaluru
Lucknow
Nagpur
Pune
Moradabad
Bharuch
Industries We Serve
Oil And Gas Industries

Gasket Industry
Sugar
Automobile Industry
Defense Industry
Construction & Fabrications
Paper Mill
Bridge And Building
Aerospace Industries
Railways
Pharmaceuticals Industry
Power Plant
Electrical Industry
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