Stainless Steel 304 Fasteners

AISI 4130 Bolts

Stainless Steel Alloy SS 304 fasteners are most widely used fasteners in corrosion resistant category. SS 304 fasteners are manufactured in wide range of bolts, screws, stud bolts, studs, threaded rods, nuts, washers & custom bolting parts. 304 stainless steel fasteners are exclusively produced in cold forged method under ASTM F593/F594 & BS EN ISO 3506-1/3506-2 specifications. Hot forged 304 stainless steel fasteners are produced under ASTM A182 F304, A193 Grade B8 & A194 Grade 8 specifications. SS 304 fasteners are well suited for its general corrosion resistance and aesthetic appearance.

304 Stainless Steel is an austenitic stainless steel and by far the most used stainless steel grade. Alternatively known by its grade equivalent AISI 304, DIN 1.4301 & UNS S30400. 304 is most versatile alloy with wide application spread. Due to its well known general corrosion properties and aesthetic appearance, SS 304 is a suitable alloy choice for manufacturing fasteners. It is also called as 18-8 Stainless Steel due to its chromium-nickel compositional ratio. It contains 18% Chromium to 8% Nickel approximately. AISI 304 has excellent forming and welding characteristics.

Chemical Composition

  • Carbon C 0.08% Max
  • Manganese Mn 2.00 max
  • Sulphur S 0.03% max
  • Phophorous P 0.045% max
  • Silicon Si 1.00% max
  • Nickel Ni 8.00-11.0%
  • Chromium Cr 18.0-20.0%
  • Iron Fe Balance

Mechanical Properties

  • Tensile Strength : 515 MPa
  • Yield Strength : 205 MPa
  • Elongation : 40% min
  • Reduction of Area : 50% min
  • Hardness, Brinell : --

AISI 304 Grade Equivalent

AISI Grade European Name UNS Designation DIN Equivalent SUS
304   S30400 1.4301 304

AISI 304 Fastening Products

AISI 304 Specifications

Specifications Material Form Products
ASTM A182 F304    
ASTM A193 Grade B8    
ASTM A194 Grade 8    
ASTM A240 Type 304    
ASTM A276 Type 304    
ASTM A479 Type 304    
ASTM A593 Type 304    
ASTM A594 Type 304    
BS EN ISO 3506-1 A2-50    
BS EN ISO 3506-1 A2-70    
BS EN ISO 3506-1 A2-80    
BS EN ISO 3506-2 A2-25    
BS EN ISO 3506-2 A2-35    
BS EN ISO 3506-2 A2-40    
BS EN ISO 3506-2 A2-50    
BS EN ISO 3506-2 A2-70    
BS EN ISO 3506-2 A2-80    


SS 304 fasteners are widely used for bolting pipeline components, instruments & equipments in following sectors.