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Bolt Manufacturers in India. Top Quality Metal Bolts!



Manufacturers of Stainless Steel Bolts & High Tensile Bolts & Fasteners

  • Stainless Steel Bolts – ASTM / ASME A/SA 193, Grade: B8 (304), B8C (SS347), B8M (SS316), B8T (SS321)
  • Alloy Steel Bolts  – ASTM / ASME A/SA 193, Grade: B6, B7/ B7M, B16, 2, 2HM, 2H, Gr6, B7, B7M
  • Duplex Steel Bolts: UNS No. S31803, S32205
  • Others: Nickel Alloy Bolts, Titanium Bolts, Aluminium Bolts, Copper, Brass, Ferrous & Non Ferrous Metals

Metline is a specialized manufacturer of hot forged bolts in various alloys including stainless steel, carbon steel, high tensile alloy steel, nickel alloys, super duplex, and duplex steels. We are India’s biggest distributor of industrial fasteners, with sales to all cities and industrial areas in India as well as overseas destinations such as Europe, US, Middle East and African Countries.

Bolts are generally differentiated based on their head style, thread type, material of construction and dimensions. Bolts are mostly used in combination with nuts, with bolts being male threaded and nuts acting as a female member of the pair. Washers are often used to prevent loosening and crushing.

Additional information


A Bolt is a device with a head on one end of the body and a thread on the other end

Types of Bolts

Heavy Hex Bolts, Hexagon Head Cap Bolts, Hexagon Head Screw, T Bolts, Collar Bolts, Mushroom Head Square Bolt, Wing Screw, U Bolts, Tap Bolts, Square Bolts

Manufacturing Standards

ASTM 193, ASTM 320, ASTM 325, ASTM 490, ASTM 307, ISO:898 / IS-1367

ASTM 193

B5, B6,B7, B7M, B16
B8M CLASS 1 & 2
B8 CLASS 1 & 2
B8C, B8T

ASTM 320

L7, L7A, L7B, L7C, L43
B8 CLASS 1 & 2B8M CLASS 1 & 2
B8F, B8T

ASTM 325

TYPE – 1, 2, 3

ASTM 490

TYPE – 1, 2, 3

ASTM 307

GR – A, B

ISO:898 / IS-1367

GR – 4.6, 5.6, 8.8, 10.9, 12. 9

Diameter Size

M02 to M160


30 mm to 1200 mm, Custom Lengths


Mild Steel, Stainless Steel, Carbon Steel, Alloy Steel, Brass, Copper, Duplex & Super Duplex Nuts, Aluminium, Hastelloy, Incoloy, Inconel, Monel.

Surface Finish

Blackening, Cadmium zinc plated, Galvanized, Hot dip Galvanized, Nickel Plated, Buffing


Metric, BSW, BSF, UNC, UNF, and as per costumers requirement

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