stainless steel bolt nut
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Stainless Steel Bolt & Nut

We are the Roll-Fast leading manufacturers of Stainless-Steel Bolt for the construction of Petrochemical Industries & general maintenance work on a daily basis. We offer Stainless-Steel Bolt in different grades like A4-50, A4-70, A4-80, B8, B8M Class 1 & Class 2, SS316S31, A4-70L and A4-80L as per ISO 3506-1 etc. We offer sizes from M10 to M100 or 1/2” to 4”.

What is Stainless Steel Bolt & Nut?

The Stainless steel bolts & nuts are made from a steel alloy that contains a minimum of 10.5% of Chromium and is also referred to as Inox steel. They do not require a protective coating, and they are able to perform well in a wide range of conditions and temperatures. Roll-Fast have over 50 different grades and surface finishes of stainless-steel fasteners and stainless bolts that are available.

Roll-fast manufactures bigger diameter bolts & nuts in stainless steel grades in A4-70, A4-80, B8, B8M Class 1 and class 2, SS316S31, A4-70L and A4-80L as per ISO 3506-1. These bolts & nuts are widely used in areas where there is high risk of rusting due to application or in areas near to seashore. Stainless steel bolts or INOX bolts are rust free and depending upon the grade they provide the required protection from extreme climatic conditions. These are also used Widely in all other kind of sectors namely, heavy engineering, Valves and pump Industry, Desalination projects, Pumping stations, Mega reservoirs, Bridges and road constructions, cross country pipe lines, flange joints and other critical applications. We are the pioneers in manufacturing stainless steel bolts & nuts for the petrochemical industries.

These Heavy Hex Bolt are manufactured by us in Alloy Steel, carbon steel, stainless steel & Duplex Steel. Popular carbon steel grades include A 320. Grades include B8, B8M (Class 1 and 2), A2-50, A2-70, A2-80, SS 316, SS 316S 31 etc. The requirements for these are mentioned in the American standard A 320.

Roll-fast manufactures world class Stainless Steel Bolt for use in petrochemical industry, these bolts are manufactured as per Indian, European and American standard in Coating like Plain, Xylon, PTFE, Non-Metallic coating etc.

We are the biggest producers for stainless steel bolts and nuts in India, as our name suggests we are manufacturing big bolts and nuts in stainless steel grades in the under mentioned table-

Fastener Type

Diameter

Grades

Grades

Grades

Grades

Grades

Hexagon bolts

M-10 to M-100

 1/2” to 4”

304 / 304 L

316 / 316 L

310 / 310 S

410 / 431

SS 316 S 31

Hex bolts

M-10 to M-100

 1/2” to 4”

304 / 304 L

316 / 316 L

310 / 310 S

410 / 431

SS 316 S 31

Hex cap screws

 M-10 to M-100

 1/2” to 4”

304 / 304 L

316 / 316 L

310 / 310 S

410 / 431

SS 316 S 31

Socket head cap screws

M-10 to M-100

 1/2” to 4”

304 / 304 L

316 / 316 L

310 / 310 S

410 / 431

SS 316 S 31

Hex nuts

M-10 to M-100

 1/2” to 4”

304 / 304 L

316 / 316 L

310 / 310 S

410 / 431

SS 316 S 31

Hex lock nuts

M-10 to M-100

 1/2” to 4”

304 / 304 L

316 / 316 L

310 / 310 S

410 / 431

SS 316 S 31

Hex nylock nuts

M-10 to M-100

 1/2” to 4”

304 / 304 L

316 / 316 L

310 / 310 S

410 / 431

SS 316 S 31

Hex castle nuts

M-10 to M-100

 1/2” to 4”

304 / 304 L

316 / 316 L

310 / 310 S

410 / 431

SS 316 S 31

Heavy hex nuts

M-10 to M-100

 1/2” to 4”

304 / 304 L

316 / 316 L

310 / 310 S

410 / 431

SS 316 S 31

Washers

M-10 to M-100

 1/2” to 4”

304 / 304 L

316 / 316 L

310 / 310 S

410 / 431

SS 316 S 31

Stud bolts

M-10 to M-100

 1/2” to 4”

304 / 304 L

316 / 316 L

310 / 310 S

410 / 431

SS 316 S 31

Comparison chart for international steel grades for stainless steel bolting’s

Grades

European Number

ASTM grade

UNS

British standard

DIN

304

1.4301

ASTM A 193 Gr B8

S 30400

BS 970

X 5CrNi1810

304 L

1.4306

ASTM A 320 Ge B8

S 30403

BS 970

X 2CrNi1911

316

1.4401

ASTM A 193 Gr B8M

S 31600

BS 970

X 5 CrNiMo 17 13 2

316 L

1.4404

ASTM A 320 Ge B8M

S 31603

BS 970

X 2 CrNiMo 17 13 2

310

1.4841

ASTM A 479

S 31000

BS 970

X 12 CrNi 25 21

310 S

1.4845

-

S 31008

BS 970

X 12 CrNi 25 21

410

1.4006

-

S 41000

BS 970

X 10Cr13

431

1.4057

-

S 43100

BS 970

X 20CrNi172

316S31

1.4401

ASTM A 193 Gr B8M

S 31600

BS 970

X 5 CrNiMo 17 12 2

Threads are standard right-hand and unified inch coarse series (UNC, Unified National Coarse) or Unified inch fine (UNF, Unified National Fine). Also metric thread with Right & Left-hand threaded Hex Bolts are also available.

To ensure full thread engagement with the hex nut, bolts/screws should be long enough to allow at least two full threads to extend beyond the nut face after tightening. Conversely, there should be two full threads exposed on the head side of the nut to make sure the nut can be properly tightened.

Manufacturing

We manufacture Stainless Steel Bolts in bigger diameters from M-10 to M-100 in diameter in class B8, B8M (Class 1 and 2), A2-50, A2-70, A2-80, SS 316, SS 316S 31 stocks are readily available and we are manufacturing bolts diameter from M-10 to M-100 diameter, we also offer ISO threads and nominal thread fitments. The biggest advantage of our manufacturing is that we do thread rolling after heat treatment, this provides for extra torque and extra fatigue strength by more than 50% and also ensures stronger unbroken fiber lines and a very fine marten site in core and in the threads of the bolts.

These Bolts are first cut on Bandsaw cutting as per Length required and then we do forging & CNC machining on bolts, After that we do Thread Rolling and then coating as per customer requirement and then final assembly

Roll-Fast is the biggest and the largest producer for stainless steel ( SS ) hex bolts, hex screws, hex nuts, washers in India, we have 3 factories with a total covered area of over 100,00 sq. feet. We produce all types of SS products which are used in marine, sewage, water and desalination plants in counties like, Oman, U.A.E., Qatar, Dubai, Bahrain, Saudi Arabia. Our popular Stainless-steel bolts and nuts, SS 304 bolts and nuts, 304 fasteners, 304 Nuts and bolts, 304 bolt nut, 304 nut bolt, 316 Bolts and nuts, 316 fasteners, 316 hex bolts, 316S31 bolts and nuts, stainless fasteners.

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