Established in 2003, the Fasteners business vertical has integrated advanced and state-of-the-art manufacturing facilities at MIDC, Tarapur in Maharashtra. We are amongst the most modern and one of the largest manufacturers of HT Fasteners in the country.

  • manufacturing capacity of 30000 MT
  • certified under
    ISO 9001:2015, ISO 14001:2015 AND ISO 45001:2018

Karamtara Fasteners offers a total systems approach to fastening solutions to the customers' requirements. We manufacture bolts, nuts, anti-theft bolts & nuts, studs, foundation bolts, U-bolts, plain and spring washers.

Our manufacturing facility in Tarapur has installed capacity of 30000 MT per annum. This plant manufactures HT & MS fasteners for Power Generation, Transmission & Distribution Industry, Telecom Tower Industry, Automobile Industry etc.

The manufacturing facility has both Hot Forging and Cold forging facilities. It is certified with ISO 9001:2008, ISO 14001:2004 and OHSAS 18001:2007 standards.

We source raw materials from Tata Steel, JSPL, RINL, Usha Martin, Dhamm Steel, Mukund Steel etc.

Click here to download Fastener Business Brochure

Approved by

  • RDSO
  • Diesel Locomotive Works
  • Central Railway
  • Western Railway
  • DFCC
  • CORE
  • BHEL

Hot Products

  • HSFG Structural Bolting Assemblies
  • Direct Tension Indicator Washers
  • Shear Studs with Ferrule
  • Hex head bolts nuts washers 8.8/10/9
  • Track Shoe Bolts


  • SIZES: From M10 to M52
  • GRADES: From 4.6to 12.9as per various standards: IS, ISO, DIN, JIS, BS and ASTM, etc.
  • Finishes :Zinc Phosphate , HDG , Auto-Black , Bright Zinc plating , Zinc Flake

Product Range and Applications:

Our product range covers all types of fasteners such as bolts, nuts, studs etc. conforming to national and international standards such as IS, ISO, BS, DIN, ASTM & ANSI etc. Our products are widely used in Transmission Line Towers, Railways, Telecom, Electricity Depts., Road crash barrier manufacturers, Oil field services etc.

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