We are the leading fastener and component suppliers to Valve Manufacturers. we have wide range of products as per requirements.

Stud Bolts, Hexagon & Heavy hexagon bolts are most commonly used in valve construction. These Hex bolts are supplied with Hex Nut & washers.

What is Role of Fasteners in Valve?

Fasteners include bolts, studs and nuts. The fastener directly bears the pressure on the valve, which plays an important role in preventing the outflow of the medium. Therefore, the selected material must ensure sufficient strength and impact toughness at the operating temperature. Our bolts have very high tensile strength which stand of valve pressure in critical situation.

ISO 4014 & ISO 4017 with Hex nut according ISO 4032 is primarily the dimensional standard for hex bolt & nut. 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, B16

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


L7, L7M, L43, B8, B8M, B8T

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, ISO

Type 1 & 2, MS, HV100 to 300, SS

1/2” to 3”, M-16 to M-76

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

  • Fully Threaded Stud / Stud Bolt
  • Double Ended Stud Bolt
  • Hex Bolt & Heavy Hex Bolt
  • Socket Cap Screw
  • Hex Nut & Heavy Hex Nut
  • Lock/Jam Nut
  • Plain Washer
  • Special Knurled Washers
  • Disc Washer

Why Roll-Fast?

We do thread rolling after Heat-treatment process to avoid Dent/Damage to threads during Handling & Heat-treatment process. This also helps to improve Mechanical Properties of the Fasteners. It is proved that if thread rolling is done after heat-treatment it helps to prevent decarburization on surface & gives better Gauge Fitment as heat-treatment surface distortion has been removed by centre less Grinding process before thread rolling.

Applications of Valves

These are commonly found in industrial, commercial, residential applications. The most common applications of bolted valves are listed below:

  • Water supply
  • Wastewater treatment,
  • Fire protection
  • Gas supply
  • Chemical and oil industries
  • Fuel handling systems
  • Power generation
  • Food Industry
  • Petroleum Products
  • Chemical Storage etc.

Custom bolts & studs for the Valves

Valve manufacturer needs fasteners it can use in flange joint connection during valve installation, and under other conditions that demand high-quality Fasteners. we provide mostly like 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.