storage tanks


We are the leading fastener and component suppliers for Storage tank Manufacturers. we have wide range of products as per requirement.

The Hexagon & Heavy hexagon bolts is most commonly used in Storage tank construction. The Hex bolt supplied with Hex Nut & washer.

What is Storage Tanks?

Storage tanks are containers that hold liquids, compressed gases, Grains etc. which is not typically labelled or regulated as a storage tank or mediums used for the short- or long-term storage of heat or cold.

Fasteners for Storage tank

Our fasteners are used in Chemical, Oil and Petrochemical, Waste Water, Food Industries for connection of flanges & Doors. Flanges are fastened together with the help of stud bolts and nuts. The nuts used in the tightening of flanges are generally of hexagon or heavy hexagon type depending upon the pressure. Flange connections are also fastened with traditional solutions like Hex Bolts. Hex bolts are very similar to stud bolts in terms of threading but have a forged hexagon head. However, stud bolts are preferred over hex Bolt because during tightening and toque application, studs do not twist.

ISO 4014 is primarily the dimensional standard for hex bolts. This defines the Dimensional requirement primarily i.e., length and the diameter of Bolt to be used for the tightening of flanges. Whereas ISO 965-1 defines the threading requirements.

We actively manufacture the following grade of bolts:




Grade name



Hex Bolt

ISO 4014, ISO 4017

8.8, 10.9, 12.9

1/2” to 3”, M-16 to M-76


Heavy Hex Bolt

ASME B18.2.1, ASME B18.2.6

B7, B8, L7, B8M

1/2” to 3”, M-16 to M-76


Stud Bolts


B7, B7M, B16, B8, B8M, B8T

1/2” to 3”, M-16 to M-76


Stud Bolt

A 307

A2-50, A2-70, A2-80, SS304, SS316, SS316 S31

1/2” to 3”, M-16 to M-76


Heavy Hex Nuts

ASTM A194, ASTM A563, A320

2, 2H, 2HM, 4, 7, 7M, 7L, 8, 8M, A, B, C, DH

1/2” to 3”, M-16 to M-76


Hex Nuts

ISO 4032, BS 3692

8, 10, 12

1/2” to 3”, M-16 to M-76



ASTM F436, DIN 125

Type 1 & 2, MS, HV100 to 300

1/2” to 3”, M-16 to M-76

These are just a few of the many items Roll-fast can produce for wet or dry storage tank applications:

  • Fin-Necked Encapsulated Bolts
  • Flanges
  • Square Bolts and Nuts
  • Hex Bolts and Nuts
  • Flat and Split Lock Washers
  • Rubber Bonded WashersA307 grade A Hex Bolts

Bolted tanks

A Bolted tank is one of the barometrical storage tanks that likewise assume a significant part as an option in contrast to the Welded Tank. These tanks are produced using plant fabricated segment fights (known as a Shell-Course in Welded Tank) that have been made in a quality-controlled production line setting. Bolted steel tanks have been in need for over fifty years. Thus, the plan and development of bolted tanks are as of now attempted and demonstrated. They give a long-haul, practical answer for a wide assortment of purposes. We give different sorts of fasteners to bolt tank producers.

Custom bolts & studs for the Storage Tank

Storage Tank manufacturer needs fasteners it can use in piping flange joint connection during piping installation in tank, and under other conditions that demand high-quality Fasteners. we provide Stud bolt, Hex bolts & nuts.

  • We are your one-stop source for non-standard fasteners cut to length and threaded to your exact application specifications. Our extensive inventory includes blanks in many grades of steel. We carry Stud Bolts up to 4" / M100 in diameter and 48" long, as well as Heavy Hex Nuts up to 4" / M100 in diameter.
  • We can make fasteners as per your requirements because we have in house hot forging capacity of M100 bolts manufacturing with high precision CNC machining.

At Roll-fast , we have a wide range of fasteners which are suitable for this very need. As a leading supplier of Hex Bolt, Full thread stud bolt, double end stud bolts and hex nuts, our fasteners conform to the strictest ANSI, ASME, BS, European, IS and ISO standards for ideal use in the harsh environments of the Sub Sea.

We can provide you Carbon Steel, Alloy Steel, Stainless Steel, Aluminium, Brass, Silicon Bronze Fasteners as per size or drawing you need.