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Nuts

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Nuts, Hex Nuts manufacturers and exporters, suppliers in India at best Price

MSTAR ENTERPRISES is one of the most recognized Manufacturer & Exporter of High Tensile Nuts Fasteners in India.The raw materials used have been tested and then used to confirm the robust and sturdy character of this product.

Specification of Nuts

Standard ASTM / ASME / BS / DIN / JIS / BS EN ISO / IS
Material Carbon Steel, Mild Steel, Alloy Steel, Stainless Steel, Duplex, Super Duplex, Inconel, Hastelloy, Incoloy, Monel, Copper, Brass & Copper Nickel etc.
Diameter Range M03 TO M100 AND 1/8” TO 4”

Coating

  • closeElectro Galvanized
  • closeHot Dip Galvanized
  • closeBlack
  • closeDracomet
  • closeZinc Plated
  • closePTFE
  • closeYellow
  • closeTIN
  • closeClient Specific Requirements

Types of Nuts

When compared with other types of fasteners, the use of nuts and bolts has the advantage that they can be disassembled as needed, while other fasteners such as rivets are designed for permanent installation. Bolts are often used with nuts and washers, where the washer provides an increase in surface area over which the attachment force is applied. There are a variety of different types of nuts that can be used with a bolt, the most common one being hex nuts. Other nut types include:

  • Locknuts
  • Hex nut
  • Nylon nut
  • Wing nut
  • Heavy hex nut
  • Jam nut
  • Cap nut
  • Flange nut
  • Long nut
  • Slotted hex nuts
  • Flange nuts
  • Cap nuts
  • Coupling nuts
  • Thumb nuts (also known as wing nuts)
  • Square nuts
  • Panel nuts
  • Surface mount nuts

Nuts and bolts can be used to join different materials together including wood, sheet metal, steel, iron, and polymers. In other cases, such as with slotted hex nuts, they can be used with a mating bolt and a cotter pin to securely lock the nut in place.

Common hand tools or power tools are available to use with bolts and nuts, which include socket sets, open-end wrenches, box wrenches, and powered drivers.

Common Nut Types

Nut Visual / Name

Nut Description
Finish Hex Nut

Grade 2

A six-sided internally threaded fastener made from low carbon steel. Finished hex nuts are a versatile and widely used nut design. Grade 2 nuts are for use with any low carbon bolt or screw that is not heat-treated, with a specified minimum tensile strength of 74,000 psi or less.

  • Material- low carbon steel which conforms to the following chemical composition requirements– Carbon: 0.47% maximum; Phosphorus: 0.12% maximum; Sulfur: 0.23% maximum.
  • Hardness- Rockwell B68 – C32
  • Proof Load- Coarse thread: 90,000 psi. / Fine thread: 80,000 psi.

Hot Dip Galvanized Steel

A six-sided internally threaded fastener made from low carbon steel with a galvanic zinc coating. Use with low carbon bolts and screws that are subjected to moisture, salt and other such corrosive conditions with a specified minimum tensile strength of 74,000 psi or less.

  • Material- low carbon steel which conforms to the following chemical composition requirements– Carbon: 0.47% maximum; Phosphorus: 0.12% maximum; Sulfur: 0.23% maximum.
  • Hardness- Rockwell B68 – C32
  • Proof Load- Coarse thread: 68,000 psi. / Fine thread: 60,000 psi.

304 & 316 Stainless Steel

Six-sided internally threaded fasteners made from austenitic alloys. Use with stainless steel bolts and screws with a specified minimum tensile strength equal to or less than the specified proof stress of the mating nut.

  • Type 304- the most common grade: (18% chromium, 8% nickel) stainless steel.
  • Type 316- chromium-nickel stainless steel, contains 2 to 3 % molybdenum. The molybdenum content increases corrosion resistance, enhances resistance to pitting and augments strength at high temperatures.
  • Material- 18-8 (18% chromium, 8% nickel): manufactured from one of the following austenitic alloys: 303, 303Se, 304, XM7
  • 316: manufactured from 316 stainless steel, an austenitic alloy with molybdenum content (2-3%) and a higher nickel content (10-14%) than 18.8
  • Hardness- 1/4 through 5/8″: Rockwell B95 – C32; 3/4 through 1″: Rockwell B80 – C32
  • Proof Load- Coarse thread: 1/4 through 5/8″: 100,000 psi. / Fine thread: 85,000 psi.
Hex Machine Nut A six-sided internally threaded fastener with flat tops and chamfered corners. Threads shall be Unified Standard, Class 2B. Designed to be used specifically with machine screws. A small pattern machine screw nut is available, similar in design to standard hex machine screw nuts but with smaller widths across the flats and across the corners. Stainless machine screw nuts are used with stainless machine screws where parts are subject to corrosive conditions.
Square Machine Nut A four-sided, internally threaded fastener, tops and bottoms flat, without chamfer. Threads shall be Unified coarse thread, Class 2B. Offers a greater bearing surface for wrenching.
Regular Square Nut A four-sided, low carbon steel, internally threaded fastener with a flat bottom side and a chamfered, washer-crowned top, designed to be used with square head bolts. A heavy pattern, with a plain finish is available for use with A307 Grade A or Grade B bolts.
Finished Hex Jam Nut A six-sided internally threaded fastener which is only 2/3 the thickness of a full form nut but has the same dimensions across the flats and corners. It can be threaded on a bolt and run tight against a standard hex nut which will lock the nut in place and prevent it from backing off. Jam nuts are also used for leveling or when a low profile is required. Available in low carbon steel, Grade 5 medium carbon steel, Grade 8 high alloy steel and 304 stainless steel.
Slotted Hex Nut Hex nut with opposite slots that are cut into the top of the nut through the centers of the flats. The slots are for the insertion of a cotter pin to secure the nut when used with a drilled shank fastener. Finished pattern slotted uts are made from a low carbon steel and are zinc plated. Heavy hex pattern can withstand a slightly higher proof load and comes in a plain finish.
Heavy Hex Nut A six-sided internally threaded fastener which is thicker and wider across the flats than a same-sized finished hex nut. Nuts measuring 7/16” and smaller are double-chamfered. Larger sizes are either double chamfered or chamfered on top with a washer base.

Grade A nuts are used with low carbon steel heavy hex bolts. Grade 5 are used with medium carbon cap screws and bolts. Grade C nuts are recommended to be used with A325 structural bolts. Grade 2H nuts are recommended for use in high pressure and high temperature service. Grade DH are recommended for use with A490, Type 1 structural bolts and Grade DH3 for A490, Type 3 structural bolts. Use 18.8 stainless steel heavy hex nuts for corrosion resistance. Hot Dip Galvanizing available on Grade A, 2H, and A563DH heavy hex nuts.

  • Hardness
    • Grade 5 – Rockwell C32 max
    • Grade A – Rockwell B68-C32
    • Grade C – Rockwell B78-C38
    • A194 Grade 2H – Rockwell C24-C38
    • A563 Grade DH & DH3 – Rockwell C24-C38
    • 18.8 Stainless Steel – ¼” through 5/8”, Rockwell B95-C32, ¾” through 1”, Rockwell B80-C32
  • Proof Load
    • Grade 5 – ¼” through 1” diameter course thread- 133,000 psi., fine thread 120,000 psi.
    • Grade A – course thread – 100,000 psi., fine thread 90,000 psi.
    • Grade C – 144,000 psi.
    • A194 Grade 2H – 150,000 psi.
    • A563 Grade DH & DH3 – 175,000 psi.
    • 18.8 Stainless Steel – ¼” through 5/8”, 100,000 psi., ¾” through 1”, 85,000 psi.
Hex Flexloc Nut An all-metal, one-piece, hex-shaped all metal prevailing torque lock nut with a round collar at its back end. The collar is segmented with opposite slots cut into it above each corner of the nut. When a screw or bolt reaches the collar, the slotted portion expands which created the prevailing torque locking action. Higher temperature use than nylon insert locknuts. The nuts are impact, shock and vibration resistant. Flexlock® Lock Nuts are available in Light Hex Full and Thin Height, and Heavy Hex Full and Thin Height. Light Hex are available in 18.8 stainless steel and steel cadmium and wax finishes, Heavy Hex is available in a steel cadmium and wax finish.
Grade 5 Finished Hex Nut Grade 5 nuts achieve their strength through cold forming. The proof load of the nut should be greater than the minimum tensile strength of the bolt to ensure that if overloaded, the bolt breaks rather than the nut threads shearing or stripping. Grade 5 finished hex nuts are designed to be used with Grade 5 hex cap screws. Grade 5 finished hex nuts typically have a clear trivalent chromate finish. The marking requirements are covered in SAE J995, Grade 5 are marked with two circumferential lines located 120° apart.
  • Material- manufactured from steel with a maximum carbon content of 0.55%, a minimum manganese content of 0.30%, and a maximum sulfur content of 0.15%. AISI 1008-1026 or equivalent
  • Hardness- Rockwell C32 max
  • Proof Load- Coarse Thread: 1/4″ through 1″ 120,000 psi. / Fine Thread: 109,000 psi / Coarse Thread: 1-1/8″ – 1-1/2″ 105,000 psi. / Fine Thread: 94,000 psi
Grade 8 Finished Hex Nut Grade 8 nuts are heat treated to provide a greater level of strength. The proof load of the nut should be greater than the minimum tensile strength of the bolt to ensure that if overloaded, the bolt breaks rather than the nut threads shearing or stripping. Grade 8 nuts are designed to be used with Grade 8 cap screws. A stronger nut can nearly always be used with a weaker bolt, a Grade 8 nut is acceptable for use on a Grade 5 cap screw. Grade 8 nuts typically have a yellow chromate finish. The marking requirements are covered in SAE J995, The marking requirements are covered in SAE J995, Grade 8 nuts are marked with two circumferential lines located 60° apart.
  • Material- manufactured from steel with a maximum carbon content of 0.55%, a minimum manganese content of 0.30%, and a maximum sulfur content of 0.05%. AISI 1021-1045 or equivalent steel.
  • Hardness- 1/4″ through 5/8″: Rockwell C24-C32 / 3/4″ through 1″: Rockwell C26-C34 / Over 1″ – 1-1/2″: Rockwell C26-C36
  • Proof Load- 1/4″ through 1-1/2″ 150,000 psi
Hex Castle Nut Similar to a slotted nut with the following difference: the slots are cut into a cylindrical portion that is equal in length to the slot depth and slightly smaller in diameter than the hex width. The slots are for the insertion of a cotter pin to secure the nut when used with a drilled shank fastener. Available in low carbon steel and Grade 5 SAE 1010-1022 steel.
Serrated Hex Flange Nut A hex flange nut with serration is a nut that is formed with an enlarged circular base that flares out from the bottom of the nut. When the nut is torqued into place, the bearing surface of the serrated base displaces the material of the mating surface. This forms a locking effect which resists vibrational loosening. The flanged surface will span an oversized hole and provide a more uniform bearing- stress to clamp-force ratio than a finished hex nut and will not gall screw threads.

A large flange nut is available with a base that is 6 to 25% wider than the base of a standard serrated flange nut. Carbon steel nuts are case-hardened to Rockwell HR15N 78-90. Also available in Grade 5 and Grade 8 steel and 18.8 stainless steel.
Hex Flange Nut Hex nut with an enlarged circular base flaring out from the bottom of the nut. The bearing surface of the flange is smooth with no serrations. Used to span oversized or irregular holes.
Nylon Insert Lock Nut A hex nut with two components, a hex nut and a nylon filled collar at its back end. When a screw reaches the collar, the threads and nylon form a tight, frictional fit, restricting movement of the screw when it is subject to vibration. The nylon insert provides reusability. When removed, the nylon relaxes and begins to return to its original shape providing continued use of the locking feature. Designed for applications with temperatures of up to 250°F.

Nylon Insert Locknuts are available in different series/types and materials, including: NE (Light Hex, Standard Height), NTE (Light Hex, Thin Height), NTU (Heavy Hex, Thin Height), NU (Heavy Hex, Full Height), NM (Machine Screw Pattern, Standard Height), and NTM (Machine Screw Pattern/Thin (Jam) Height). Available in steel, stainless steel, brass and aluminum.
K-Lock Nut (Keps) A hex nut pre-assembled with a free spinning external tooth lock washer. The locking action is achieved when the nut is tightened against a bearing surface as the teeth of the lock washer dig into it. The nuts are manufactured from AISI 1008-1020 or equivalent steel; and the washers from 1050-03 or equivalent steel. Also available in 18.8 stainless steel.
Grade C Top Lock Nuts All Metal Hex Lock Nuts are designed to increase the resistance to rotation by developing a “prevailing torque” action between the bolt threads and the nut threads. This prevailing torque action is developed by “crimping” the nut to create added friction between the threads of the nut and the bolt. All metal lock nuts feature a crowned top that is crimped to create the locking feature. This crowned top design is called a “stover” style lock nut. The crimp provides a locking ability and resistance to loosening in high vibration applications.

All metal lock nuts are made to the material properties and strength requirements as per the standard IFI 100/107 for Grade C which is designed to be used on fasteners up to a Grade 8 strength level.
Rod Coupling Nuts Rod coupling nuts are used to connect two pieces of threaded rod. Available in low carbon steel, plain and hot dip galvanized finish, grade 5 and 18.8 stainless steel. Hot-dip galvanizing generally adds 2.5 to 5 mils of thickness to the threaded portion of a fastener, so galvanized couplers are tapped oversize to accommodate the added thickness to the corrosion resistant coating on the bolts.
Two-Way Reversible Lock Nuts A hex nut with two or three round or rectangular indentations, compressed on to the flat sides of the nut equal distances from each other. The compressions create slightly distorted center threads resulting in a controlled locking action when the threads of a mating part become engaged.

Used primarily with machine screws, low carbon steel bolts and 18.8 stainless steel bolts. It allows for automatic assembly ability to be used either top-up, or top-down. It creates a locking action even without being fully threaded onto its mating screw.
3 Prong Wood Tee Nuts 3-prong tee nuts are used to fasten a metal piece to a component that is made of wood, plastic, or particleboard, or for anchoring wood components to each other. 3 Prong T-Nuts are used mostly in hard materials to minimize splitting caused by prongs. Available in steel zinc and steel black zinc plated.
Acorn Cap Nuts Low crown steel cap nuts are usually manufactured in two pieces, a hex nut and an acorn-shaped top, with a zinc die cast to form the finished nut. Stainless steel cap nuts are similar in design to the steel nut but made from 304L or an equivalent stainless and can be a one or two-piece style. Available in the aforementioned stainless steel and steel with a nickel plating or black zinc finish and black oxide. Cap nuts are used for decorative purposes or as covers for projecting threads.
Cold Forged Wing Nuts A nut with wings which allow the part to be manually turned. Manufactured from carbon steel that is adaptable to the cold-forging process. Available in a zinc plated finish, black oxide and nickel and 18.8 stainless steel.

Specifications for Fasteners

MSTAR ENTERPRISES is a Dominant and Expert manufacturer of high-quality bolts, Hub bolts, U-bolts, Hex bolts, spring bolts, Shackle bolts, Nuts, Long bolts and Stud bolts.We likewise fabricate these items as per client’s Requirement and Specification.

Forming: Hot & Cold Forged
Metric Size: M10 to M100
Imperial Size: 3/8 to 8″
Threads: UNC, UNF, ISO, BSW & ACME
Standards: ASME,BS,DIN,ISO,UNI,DIN-EN

Available Fasteners Grades

ASTM A194 Grade B5 ASTM A193 Grade B5 ASTM A325 Type 1 ASTM A354 Grade BC ASTM A307 Grade A ASTM A394 ASTM A320 Grade L7 ASTM A453 Grade 660
ASTM A194 Grade B6 nuts ASTM A193 Grade B6 ASTM A325 Type 2 ASTM A354 Grade BD ASTM A307 Grade B ASTM A437 ASTM A320 Grade L7M ASTM A453 Grade 651
ASTM A194 Grade B7 nuts ASTM A193 Grade B7 ASTM A325 Type 3 ASTM A490 Type 1 ASTM A540 Grade B21 ASTM A449 Type 1 ASTM A320 Grade L43 ASTM A453 Grade 662
ASTM A194 Grade B7M nuts ASTM A193 Grade B7M ASTM A194 Grade B8M ASTM A490 Type 2 ASTM A540 Grade B22 ASTM A449 Type 2 ASTM A320 Grade B8 ASTM A453 Grade 665
ASTM A194 Grade B16 ASTM A193 Grade B16 ASTM A193 Grade B8M ASTM A490 Type 3 ASTM A540 Grade B23 ASTM A1014 ASTM A320 Grade B8M ASTM A453 Grade 668
ASTM A194 Grade B8 ASTM A193 Grade B8 ASTM A194 Grade B8M class 1 ASTM A193 Grade B8M class 1 ASTM A540 Grade B24 ASTM A1082 ASTM A320 Grade B8T ASTM A193 Grade B8MA
ASTM A194 Grade B8 class 1 ASTM A193 Grade B8 class 1 ASTM A194 Grade B8M class 2 ASTM A193 Grade B8M class 2 ASTM A540 Grade B24V ASTM F468 Fasteners Specification ASTM A320 Grade B8C ASTM A194 Grade B8MLCuN
ASTM A194 Grade B8 class 2 ASTM A193 Grade B8 class 2 ASTM A194 Grade B8M2 ASTM A193 Grade B8M2  – hexagon nuts at best price in india ASTM F568M ASTM F1554 Grade 36 ASTM A193 Grade B8MLCuN
ASTM A194 Grade B8 class 2B ASTM A193 Grade B8 class 2B ASTM A194 Grade B8M3 ASTM A193 Grade B8M3 ASTM A194 Grade B8MA ASTM F593 ASTM F1554 Grade 55 ASTM A194 Grade B8MLCuN Class 1B
ASTM A194 Grade B8A ASTM A193 Grade B8A ASTM A194 Grade B8MLCuN Class 1D ASTM A193 Grade B8MLCuN Class 1D ASTM A193 Grade B8MLCuN Class 2 ASTM 738M ASTM F1554 Grade 105 ASTM A193 Grade B8MLCuN Class 1B
ASTM A194 Grade B8C ASTM A193 Grade B8C ASTM A194 Grade B8MLCuNA ASTM A193 Grade B8MLCuNA ASTM A194 Grade B8MLNA ASTM F2482 ASTM A193 Grade B8MLNA ASTM A194 Grade B8MN
ASTM A194 Grade B8C class 1 ASTM A193 Grade B8C class 1 ASTM A194 Grade B8MLN ASTM A193 Grade B8MLN ASTM A193 Grade B8MN ASTM F3125 ASTM A194 Grade B8MN Class 1B ASTM A193 Grade B8MN Class 1B
ASTM A194 Grade B8C class 2 ASTM A193 Grade B8C class 2 ASTM A194 Grade B8MN Class 1D ASTM A193 Grade B8MN Class 1D ASTM A194 Grade B8MN Class 2 ASTM F3148 ASTM A193 Grade B8MN Class 2 ASTM A194 Grade B8MNA
ASTM A194 Grade B8CA ASTM A193 Grade B8CA ASTM A193 Grade B8MNA ASTM A194 Grade B8N ASTM A193 Grade B8N ASTM A194 Grade B8N Class 1B ASTM A193 Grade B8N Class 1B ASTM A194 Grade B8N Class 1D
ASTM A194 Grade B8CLN ASTM A193 Grade B8CLN ASTM A193 Grade B8N Class 1D ASTM A194 Grade B8N Class 2 ASTM A193 Grade B8N Class 2 ASTM A194 Grade B8NA ASTM A193 Grade B8NA ASTM A194 Grade B8P
ASTM A194 Grade B8CLN class 1 ASTM A193 Grade B8CLN class 1 ASTM A193 Grade B8P ASTM A194 Grade B8PA ASTM A193 Grade B8PA ASTM A194 Grade B8R ASTM A193 Grade B8R ASTM A194 Grade B8R Class 1C
ASTM A194 Grade B8CLN class 1D ASTM A193 Grade B8CLN class 1D ASTM A193 Grade B8R Class 1C ASTM A194 Grade B8R Class 1D ASTM A193 Grade B8R Class 1D ASTM A194 Grade B8RA ASTM A193 Grade B8RA ASTM A194 Grade B8S
ASTM A194 Grade BCLNA ASTM A193 Grade BCLNA ASTM A193 Grade B8S ASTM A194 Grade B8SA ASTM A193 Grade B8SA ASTM A194 Grade B8T ASTM A193 Grade B8T ASTM A194 Grade B8T Class 1
ASTM A194 Grade B8LN ASTM A193 Grade B8LN ASTM A193 Grade B8T Class 1 ASTM A194 Grade B8T Class 2 ASTM A193 Grade B8T Class 2 ASTM A194 Grade B8TA ASTM A193 Grade B8TA ASTM A194 Grade B8LN class 1
ASTM A193 Grade B8LN class 1 ASTM A194 Grade B8LN class 1D ASTM A193 Grade B8LN class 1D ASTM A194 Grade B8LNA ASTM A193 Grade B8LNA ASTM F1554 Grade 36 ASTM F1554 Grade 55 ASTM F1554 Grade 105

Available Fasteners Standards & Sizes

ASME B18.2.1 Size 3/8 inch to 3 inch
BS 1769 Size:- ½ inch to 2 inch
ASME B18.2.3.6M Size:- M12 to M36
ASME B18.2.3.7M Size:-M16 to M36
DIN 6914 Size:-M12 to M36
ISO 7412 Size:-M12 to M36
UNI 5712 Size:-M12 to M36
DIN-EN 14399-4 Size:-M12 to M36

AvailableFasteners Materials

Carbon Steel Tantalum Nickel Silver Silicon Aluminum Bronze
Alloy Steel Zirconium Beryllium Copper Stellite
Stainless Steel Inconel Brass Waspalloy
Duplex Stainless Steel Monel Aluminum Bronze Maraging
Aluminum Hastelloy Silicon Bronze Rene
Titanium Incoloy Phosphor Bronze Sanicro
Copper Nimonic Manganese Bronze Invar
Super Duplex Steel Molybdenum Tin Bronze Nilo
Nickel Copper Nickel Nickel Aluminium Bronze Tool Steel

Country We Supply Fasteners

 SAUDI ARABIA  MONGOLIA  GERMANY  SOUTH KOREA  UNITED STATES  UNITED ARAB EMIRATES  PERU
MALAYSIA  GREECE  NIGERIA  UNITED KINGDOM  NETHERLANDS  VIETNAM  MADAGASCAR
KENYA  THAILAND  AUSTRALIA  INDONESIA SINGAPORE  MEXICO  QATAR
 GHANA  MONGOLIA  CANADA  ISRAEL CHILE IRAN OMAN
RUSSIA  BRAZIL SOUTH AFRICA Mozambique APEC Countries ASIA  ASIA PACIFIC
Australia Oceania New Zealand Balkan Region Baltic Caribbean Tanzania
Offshore
Nigeria		 Angola EGYPT MUSCUT INDIA UAE GULF

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