HSFG BOLT

Bolt Tightening Techniques

• When slip resistant connections are not required, high strength bolts are tightened to a ‘snug-tight’ using an ordinary spud wrench.

• When slip resistant connections are desired with HDFC bolts, three methods are used:
> Turn-of-the-nut tightening (part-turn method) -Cheap, more reliable, and common method.
> Direct tension indicator tightening,
> Calibrated wrench tightening (torque control method).

Advantages of Bolted connections

Bolted connections offer the following advantages over riveted or welded connections:
  • Use of unskilled labour and simple tools.
  • Noiseless and quick fabrication.
  • No special equipment/process needed for installation.
  • Fast progress of work. Accommodates minor .
  • discrepancies in dimensions.
  • The connection supports loads as soon as the bolts are tightened (in welds and rivets, cooling period is involved).

Main drawback of black bolt is the slip of the joint when subjected to loading

Advantages of HSFG Bolts

•HSFG bolts do not allow any slip between the elements connected, especially in close tolerance holes, Thus they provide rigid connections.
• Because of the clamping action, load is transmitted by friction only and the bolts are not subjected to shear and bearing.
• Due to the smaller number of bolts, the gusset plate sizes are reduced.
• Deformation is minimized.
• Holes larger than usual can be provided to ease erection and take care of lack-of-fit. However note that the type of hole will govern the strength of the connection.
• Noiseless fabrication, since the bolts are tightened with wrenches.
• The possibility of failure at the net section under the working loads is eliminated.

Since the loads causing fatigue will be within proof load, the nuts are prevented from loosening and the fatigue strength of the joint will be greater than in welded/connections.
• Since the load is transferred by friction, there is no stress concentration in the holes.
• Unlike riveted joints, few persons are required for making the connections.
• No heating is required and no danger of tossing of bolt. Thus safety of the workers is enhanced.
• Alterations, if any (e.g. replacement of defective bolt) is done easily than in welded connections.

We are a leading Manufacturer of HSFG BOLT NUT, HSFG WASHER, MS RIVET, HIGH TENSILE BOLT NUT from Kolkata, India.

HSFG BOLT NUT

Approx Price : Rs 50 / Piece

High Strength Friction Grip Bolts (HSFG) bolts are high strength structural bolts which have been tightened such as to induce tension in the bolt shank. Due to the tension in the bolt, the interface between the plies (steel members in a joint) cannot move relative to each other because of the friction resistance. The bolts act differently than normal bolts or rivets.

(50 to 1000 rupees) Per Piece.

HSFG WASHER

We are the leading Manufacturer & Exporter of HSFG Washers in various range & sizes.

Specifications:

  1. Size: 16mm – 36mm
  2. Material: Brass (Other Special Grade as per customer requirement)
  3. Thickness: 8mm (0.25mm – 10mm)
  4. Finish: Electro zinc plated (Other special coating as per customer requirement)

MS RIVET

With the help of diligent and adept professionals, we have been able to offer a quality range of MS Rivets. The offered product is used in different industrial and commercial working. Provided product is manufactured using latest techniques and best quality factor input. This product is stringently checked by our quality experts against several quality parameters before the final dispatch. It is available for our valuable clients at budget friendly price.

Features :

  1. Anti corrosive
  2. Easy installation
  3. Precise design

 

 

HIGH TENSILE BOLT NUT

Approx Price : Rs 75 / Kilogram

Our clients are provided with best High Tensile Bolts in bulk amount. We try to meet the specific requirements of our clients and source only the best and sustainable products. They are easy to install, long sustainable, perfect in fitting and are highly stainless. Our vendors apply superior metals to make them advanced and durable. We ensure advanced range of nuts at nominal price range.

Features :

  1. Advanced quality
  2. High reliability
  3. Superior performance
  4. Corrosion-resistance
  5. Easy to fit

 

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