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Square Bolts

Square Head machine bolts were the industry standard prior to hex bolts gaining prominence. Square bolts are now most commonly used for aesthetic purposes to provide a rustic look in a new structure or to match existing fasteners in an older structure.


ASTM & DIN 479


Carbon Steel, Mild Steel, Alloy Steel & Stainless Steel

Dia Range:

Metric Size: M12 TO M68
Imperial Size: 1/4” TO 3”


Gr.5 Gr.8 8.8 10.9 L7 L7M
307A B7 B7M B16 B7/L7
A2-70 A2-80 A4-70 A4-80
304 304L 316 316L


  • Zinc Flakes Coating
  • Mechanical Galvanizing
  • Zinc Dichromate
  • Ceramic Coating
  • Tectyl Coating
  • Zinc Nickel Coating
  • Electroless Nickel Plating
  • Electro Zinc Plating
  • Molykote Coating
  • Takecoat 1000
  • Hot Dip Galvanized
  • Stainless steel
  • Black
  • PTFE Coating
  • Yellow
  • Dacromet coating, TIN, Client Specific Requirements