PERFECT ENGINEERING CO
Stainless Steel Nut Bolts (SS 304 / SS 316)
SS hex bolts, nuts, allen bolts, studs and washers in SS 304, SS 316 and SS 202 — for food, pharma, chemical, marine and outdoor applications where corrosion resistance matters.
About our stainless steel nut bolts range
We stock a full range of stainless steel fasteners in Mumbai: SS hex bolts (half and full thread), SS hex nuts and nylock nuts, SS allen bolts (socket head cap screws), CSK and button head screws, grub screws, studs and threaded rods, plain and spring washers, and dom nuts. Common sizes such as M6, M8, M10, M12 and M16 SS bolts are kept in ready stock in multiple lengths.
SS 304 (A2) suits most indoor and outdoor uses, food processing and pharma plants. SS 316 (A4) contains molybdenum and is the right choice near the sea, in chemical plants and anywhere chlorides are present. SS 202 is an economical option for light-duty and decorative work. Non-standard sizes and long SS bolts can be made to your drawing.
Common sizes we supply: M6, M8, M10, M12, M16 and M20 SS bolts — for example M8 x 25, M10 x 40, M12 x 50 and M16 x 75 — in SS 304 and SS 316, with matching SS nuts and washers.
Also known in the trade as: SS nut bolt, SS bolt, SS 304 bolt, SS 316 bolt, Stainless steel bolt, SS allen bolt, SS hex bolt, A2 bolt.
Available makes
Technical specifications
- Products
- Hex bolts · Hex nuts · Nylock nuts · Allen bolts · CSK & button head screws · Grub screws · Studs & threaded rods · Washers · Dom nuts
- Material
- Stainless steel SS 202, SS 304 (A2), SS 316 (A4)
- Property Class
- A2-70, A4-70, A4-80
- Standards
- DIN 931 / 933 · DIN 934 · DIN 912 · DIN 7991 · ISO 7380 · DIN 916 · DIN 975 · DIN 125 / 127 · DIN 985 · DIN 1587
- Diameter
- Metric M3 – M36 · Inch 1/8" – 1-1/2"
- Length
- 6 mm – 300 mm (longer to order)
Finishes available
Stainless Steel SS 304 (A2)
Natural finish; general corrosion resistance for food, pharma, and outdoor use.
Stainless Steel SS 316 (A4)
Molybdenum grade for marine, chemical, and coastal environments.
Stainless Steel SS 202
Economical stainless for light-duty and decorative fastening.
Stainless steel fasteners we supply
| Product | Standard | Grades | Size Range |
|---|---|---|---|
| SS Hex Bolt (half thread) | DIN 931 | SS 304 / 316 | M6 – M36 |
| SS Hex Bolt (full thread) | DIN 933 | SS 202 / 304 / 316 | M3 – M30 |
| SS Hex Nut | DIN 934 | SS 202 / 304 / 316 | M3 – M36 |
| SS Nylock Nut | DIN 985 | SS 304 / 316 | M3 – M24 |
| SS Allen Bolt (SHCS) | DIN 912 | A2-70 / A4-70 | M3 – M24 |
| SS CSK Allen Screw | DIN 7991 | A2-70 | M3 – M16 |
| SS Grub Screw | DIN 916 | A2 / A4 | M3 – M16 |
| SS Stud / Threaded Rod | DIN 975 | SS 304 / 316 | M6 – M30 |
| SS Washers | DIN 125 / 127 | SS 304 / 316 | M3 – M36 |
Popular sizes: M6, M8, M10, M12 and M16 SS bolts with matching nuts and washers. Ask for inch (BSW / UNC) sizes.
Common questions
What is the difference between SS 304 and SS 316 bolts?
SS 316 contains about 2% molybdenum, which makes it far more resistant to chlorides — sea air, salt water and many chemicals. SS 304 is fine for most indoor, food and general outdoor use and costs less.
Are stainless steel bolts stronger than high-tensile bolts?
No. A2-70 stainless has a minimum tensile strength of about 700 MPa, lower than a grade 8.8 steel bolt. Choose stainless for corrosion resistance, not strength.
Why is my SS 304 bolt slightly magnetic?
SS 304 is non-magnetic when annealed, but cold forming the head and threads can make it slightly magnetic. This is normal and does not mean the bolt is not stainless.
Do you supply M12 SS bolts?
Yes. M12 SS 304 and SS 316 hex bolts, allen bolts, nuts and washers are kept in stock in common lengths.
Hex Bolts & Nuts
Nylock Nuts
Washers
Grub Screws