Discover Top-Quality Alloy Steel Fasteners, Engineered for Strength and Durability – Custom Bolts, Nuts & Screws in Various Sizes & Grades
Nandini Steel is a quality supplier of Alloy Steel Fasteners which provide great strength and high corrosion resistance. Alloy steel is composed of alloying elements that enhance mechanical property characteristics such as chromium, molybdenum and nickel. Our fasteners are produced with precision forged with heat treatment and CNC machining in compliance with stringent quality standards. We supply a wide variety of Alloy Steel Fasteners such as bolts, nuts, washers, studs and screws in all alloy steel fasteners grades. We conform to DIN, ASTM, BS and various other domestic and international standards.

Top Alloy Steel Fasteners Manufacturer in Mumbai – High-Strength Bolts, Nuts, Screws & Washers in ASTM/ASME Standards at Competitive Prices
Applications of Alloy Steel Fasteners
Alloy Steel Fasteners are extensively utilized in environments of high stress and high temperature. The oil & gas, petrochemical, power generation, automotive and heavy equipment industries use these fasteners to form the critical joints in their connections. The high strength, hardness and wear resistance of these Alloy Steel Fasteners makes it vital in static and dynamic load applications.
Key Features of Alloy Steel Fasteners
- High Tensile Strength: These fasteners are built to withstand high-pressure environments to maintain their integrity under extreme mechanical stress.
- Corrosion and Oxidation Resistance: The alloying elements provide resistance to rust corrosion and oxidation ensuring durability.
- Heat Resistance: These fasteners retain their strength and shape in elevated thermal conditions which make them suitable for high-temperature applications.
- Precision Engineering: Manufactured using advanced technology and strict quality control, each fastener guarantees high-performance reliability.
Alloy Steel Fasteners vs Other Material Fasteners
Alloy Steel Fasteners have significantly higher tensile strength and thermal stability than stainless steel or carbon steel fasteners, making them the best choice for extreme industrial uses. Stainless steel fasteners are aesthetically pleasing and corrosion-resistant, alloy steel fasteners are the fastest for load-bearing and extreme pressures. Alloy steel fasteners provide the best value for performance, cost and durability .
Packaging, Testing & Delivery
All Alloy Steel Fasteners undergo strict quality testing for dimensional accuracy, mechanical strength and durability. Packaging is done in secure, tamper-proof materials to avoid damage during transit. We are ISO 9001:2015 certified to ensure reliability. We prioritize timely shipping and customer satisfaction.
Reach out today for your durable fasteners needs, and let us help you find the appropriate fastener for your project needs!
Other Types Alloy Steel Fasteners

Alloy Steel Bolt

Alloy Steel Nut

Alloy Steel Screws

Alloy Steel Washers

Alloy Steel Stud Bolts

Alloy Steel Anchor Bolts

Alloy Steel Studs

Alloy Steel Threaded Rod
Alloy Steel Fastener Specification
Standard: A193, A194 / ASME SF593, F594, SA193, SA194
Bolt / Screw Size: M3 – M56 | 3/6″ to 2″ | Custom Sizes
Nuts Size: M3 – M56 | 3/6″ to 2″ | Custom Sizes
Washers Size: M3 – M56 | 3/6″ to 2″ | Custom Sizes
Machine Screws Size: M1.6 – M12
Self Tapping Screw Size: No.2 – No.14
Length: 3 mm to 200 mm
Threads: UNF, BSW, BSF, METRIC, UNC, or as required
Fasteners: DIN: DIN 934, DIN 931, DIN 970, DIN 933 , UTS: UNEF, NPT, UNC, UNS, UNF, NPTF , ISO: JIS Standards, ISO 4033, ISO 4032 , ANSI: ANSI B28.2.4 1M (Stud Bolts), ANSI B18.2.4 2M (Hex Nuts) , ASME: ASME B18.5, ASME B18.2.2, B16.5
Form: Hex, Threading, Square, Round as per Gauge etc.
Raw Materials Source: JSPL, Mukund Steel, Tata Steel, Dhamm Steel, Usha Martin, etc.
Threads Configuration: ASME B1.1 2A/3A – 2B/3B Inch Unified Threads, B1.13M 6h-6G Metric Coarse Threads
Certification: Dual Certified as per ASTM & ASME Codes
Dimensions: DIN 931, 933, 934, 7991, 976, 125; ASME B18.2.1, B18.3
Thread Details: Unless otherwise specified, threads shall be rolled or cut and tapped horizontally or vertically
Test Certificate: EN 10204 / 3.1 Manufacturer Test Certificate
Additional Certifications: PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified
Production Process: M24–M100: Hot Forging , M2–M24: Cold Forging , Custom-made: Machining & CNC
Types: Bolts, Nuts, Stud Bolts, Washers, Threaded Rod, Anchor Fasteners, Eye Bolt, Stud, Cotter Pin, Socket Screw, Fine Fasteners & Spares, Foundation Fasteners, Hexagon Castle Nuts, Hexagon Domed Cap Bolts, Hexagon Thin Nuts etc.
Grade | C | Mn | Si | P | S | Cr | Mo |
F1 | 0.15 max | 0.3-0.6 | 0.5 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
F5 | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
F9 | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 8-10 | 0.9-1.1 |
F11 | 0.5-0.15 | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 1.0-1.5 | 0.44-0.65 |
F12 | 0.15 max | 0.3-0.6 | 0.5 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
F22 | 0.15 max | 0.3-0.6 | 0.5 | 0.03 | 0.03 | 4-6 | 0.44-0.65 |
F91 | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 8-10 | 0.9-1.1 |
Grade | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
F1 | 275 | 485 | 20 % |
F5 | 275 | 485 | 20 % |
F9 | 380 | 585 | 20 % |
F11 | 205 | 415 | 20 % |
F12 | 275 | 485 | 20 % |
F22 | 205 | 415 | 20 % |
F91 | 380 | 585 | 20 % |
Material Group | Common Name | Type | UNS | Forging Spec. | Casting Spec. Equivalent | DIN | DIN W. No | Application |
Low AS | Moly Steel | C-1/2Mo | K12822 | A182-F1 cl2 | A217-WC1 | 15M03 | 1.5415 | Up to 470ºC* (875ºF) |
AS Chrome Moly | 1.1/4Cr-1/2Mo | K11572 | A182-F11 cl2 | A217-WC6 | 13CRM044 | 1.7335 | Up to 593ºC (1100ºF) | |
2.1/4Cr-1Mo | K21590 | A182-F22 cl3 | A217-WC9 | 10CRM0910 | 1.7380 | Up to 593ºC (1100ºF), HP steam | ||
5Cr-1/2Mo | K41545 | A182-F5/F5a | A217-C5 | 12CRMO195 | 1.7362 | High temp refinery service | ||
9Cr-1Mo | K90941 | A182-F9 | A217-C12 | X 12 CrMo 9 1 | 1.7386 | High temp erosive refinery service | ||
9Cr-1Mo-V | A182-F91 | A217-C12A | X 10 CrMoVNb 9 1 | 1.4903 | High pressure steam |
Alloy Steel Fasteners Nuts and Bolts Metric Hex Bolt Dimensions
NOMINAL SIZE (D) | BODY DIAMETER | HEAD THICKNESS | ACROSS THE FLATS | ACROSS CORNERS | ||||
D (MAX) | D (MIN) | H (MAX) | H (MIN) | F (MAX) | F (MIN) | C (MAX) | C (MIN) | |
m10 Bolts | 10.00 | 9.78 | 6.63 | 6.17 | 17.00 | 15.73 | 18.48 | 17.77 |
m12 Bolts | 12.00 | 11.73 | 7.76 | 4.24 | 19.00 | 17.73 | 20.78 | 20.03 |
m14 Bolts | 14.00 | 13.73 | 9.09 | 8.51 | 22.00 | 20.67 | 24.25 | 23.35 |
m16 Bolts | 16.00 | 15.73 | 10.32 | 9.68 | 24.00 | 23.67 | 27.71 | 26.75 |
m20 Bolts | 20.00 | 19.67 | 12.88 | 12.12 | 30.00 | 29.16 | 34.64 | 32.95 |
m24 Bolts | 24.00 | 23.67 | 15.44 | 14.56 | 36.00 | 35.00 | 41.57 | 39.55 |
m30 Bolts | 30.00 | 29.67 | 19.48 | 17.92 | 46.00 | 45.00 | 53.12 | 50.85 |
m36 Bolts | 36.00 | 35.61 | 23.38 | 21.63 | 55.00 | 53.80 | 63.51 | 60.79 |
m42 Bolts | 42.00 | 41.38 | 26.97 | 25.03 | 65.00 | 62.90 | 75.06 | 71.71 |
m48 Bolts | 48.00 | 47.38 | 31.07 | 28.93 | 75.00 | 72.60 | 86.60 | 82.76 |
m56 Bolts | 56.00 | 55.26 | 36.2 | 33.80 | 85.00 | 82.20 | 98.15 | 93.71 |
m64 Bolts | 64.00 | 63.26 | 41.32 | 38.68 | 95.00 | 91.80 | 109.70 | 104.65 |
m72 Bolts | 72.00 | 71.26 | 46.45 | 43.55 | 105.00 | 101.40 | 121.24 | 115.60 |
m80 Bolts | 80.00 | 79.26 | 51.58 | 48.42 | 115.00 | 111.00 | 132.72 | 126.54 |
m90 Bolts | 90.00 | 89.13 | 57.74 | 54.26 | 130.00 | 125.50 | 150.11 | 143.07 |
m100 Bolts | 90.00 | 99.13 | 63.9 | 60.10 | 145.00 | 140.00 | 167.43 | 159.60 |
Weight Chart For Alloy Steel Fasteners
Size | Finished Hex | Heavy Hex | Finished Jam | Heavy Hex Jam | Square | Heavy Square |
1/2″ | 3.75 | 6.54 | 2.62 | 4.00 | 5.78 | 7.87 |
5/8″ | 7.33 | 11.9 | 4.93 | 6.96 | 10.8 | 14.3 |
3/4″ | 11.9 | 19.3 | 7.70 | 11.0 | 15.4 | 23.5 |
7/8″ | 19.0 | 29.7 | 12.0 | 16.7 | 24.5 | 36.2 |
1? | 28.3 | 42.5 | 17.6 | 23.5 | 36.3 | 51.5 |
11/8″ | 40.3 | 59.2 | 24.7 | 32.4 | 52.5 | 72.4 |
11/4″ | 54.3 | 78.6 | 36.1 | 45.8 | 70.6 | 95.5 |
13/8″ | 73.0 | 102 | 47.9 | 59.3 | 94.5 | 125.0 |
11/2″ | 94.3 | 131 | 60.9 | 74.8 | 122 | 161 |
15/8″ | 162 | 91.6 | ||||
13/4″ | 151 | 204 | 100 | 114 | ||
17/8″ | 241 | 134 | ||||
2? | 224 | 299 | 140 | 165 | ||
21/4″ | 419 | 227 | ||||
21/2″ | 564 | 332 | ||||
23/4″ | 738 | 429 | ||||
3? | 950 | 545 | ||||
31/4″ | 1194 | 651 | ||||
31/2″ | 1526 | 851 | ||||
33/4″ | 1812 | 1005 | ||||
4? | 2180 | 1200 |
Alloy Steel Fasteners Surface Treatment

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