Direct Tension Indicator (DTI) Washers

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DTI Washers Manufacturer


GHS Fasteners offers a wide range of washers including Plain Washers, Pack Washers, Spring Washers, Conical Washers and more. We are one of the largest DTI washer manufacturers in India. We offer products in a wide range of sizes according to the requirements of the customer.

We manufacture these DTI washers according to the ASTM F959 & EN-14399-9 standards. DTI Washers stands for ‘Direct Tension Indicator Washers’ and is used to measure the bolt tension developed during the tightening process which is regardless of the torque resistance of the bolt. These washers are typically manufactured by us in the C-45, 8.8 and 10.9 grades. GHS Fasteners is among the largest manufacturers of DTI washers in India and is known for the high-quality, reliable products that we produce.

One can easily use these washers by simply affixing it at one end of the bolt. DTI washers are usually independent of the torque resistance of the bolt assembly. Whenever a fastener assembly is tightened, the arch-like protrusions on the washers are compressed, and the distance base and apex of the protrusions are changed.


We are highly familiar with the traditional and International market needs. The multipurpose DTI washers are available in various sizes, each being manufactured with a purpose to meet your convenience. Ranging from M12 to M36, we offer you appropriate and favourable sizes in the mentioned range.

Finishing and colors available

  • Zinc Plated : We do zinc plating to produce corrosion-resistant conical washers. The zinc coating acts as a kind of sacrifice, which gets corroded before the corrosion reaches the actual material.
  • Mechanical Galvanized : In mechanical galvanizing, we apply a thick coat of zinc is applied without electricity (as in electroplating) and perform the process at room temperature. Our production process is known for its uniform thickness and consistency between batches.
  • Natural Black : We provide the black finish by coating the conical washer with black oxide. We do this to improve resistance to corrosion and to minimize light reflection. The major advantage of this coating is the minimal build up when compared to other coatings.
  • Hot Dip Galvanized (HDG) : Hot Dip galvanizing is one of the oldest and most prevalently used methods of coating that we use. Here, we clean the washer and dip it in a flux tank containing zinc ammonium chloride, which helps in coating the zinc onto the washer.

Grades of raw materials used

We obtain the highest quality of raw materials from leading vendors in the market. The raw materials we use for producing conical washers are:

  • C-45
  • 8.8
  • 10.9

Apart from these, we can also use other raw materials for production, which can be chosen according to the customer’s need and requirement.


M12 to M36


C-45, 8.8, 10.9

Finish / Colors

  • Self Finish
  • Electro Zinc Plated
  • Yellow Finish
  • Auto Black Finish
  • Hot Dip Galvanized (HDG)
  • Rilsan Blue, Etc.


ASTM F-959, EN-14399-9

Support: +91-9803262009