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Our clients can avail from us, a wide range of stainless steel fasteners that is extensively used in several industry verticals. These fasteners are offered in several types like nuts, bolts and screws in different material, design and weight. We also undertake custom-designing of our stainless steel fasteners to meet their application requirements in various industries.

Non ferrous metal fasteners like inconel, monel, titanium class 1 and 2, copper, hastelloy, and others can also be manufactured as per the requirement.

We are instrumental in offering our clients with a quality range of stainless steel fasteners that is fabricated using stainless steel and nickel alloy. Highly appreciated for its high tensile strength, rust resistance and durability, these fasteners are available in different sizes. Available in several grades like industrial washers, industrial screws, stainless washers, threaded rod and stainless screws, these fasteners are extensively used in various industrial operations. These fasteners are hot dipped galvanized and coated with phosphate, teflon, xylon, zinc or cadmium as per the request of our clients. We also provide these fasteners along with manufacturer test certificate as per EN 10204 / 3.1B

Silver tubes is a trusted and reliable supplier and exporter of fasteners. We deal in all types of ferrous and non-ferrous fasteners. We supply these in standard and non-standard dimensions to fulfill different requirements of our customers. Extra finishing and machining allowances are also provided. Our offered range of fasteners is supplied under ISO standards and manufacturing design codes. Fasteners are mostly used for making non-permanent joints. The basis of fasteners is basically threaded. It has two parts male and female. The male part has external threads and the female part has internal joints. By means of external forces, these joints can be fastened. Certain types of coatings are provided on the fasteners to improve their performance. The aim of this coating is to enhance resistance abilities of the fasteners. These have excellent impact strength to make any assembly strengthen. It has excellent corrosion resistance strength makes it an ideal option for reducing and mild environments.

Mechanical properties of fasteners:
• Tensile strength
• Proof load strength
• Shear strength
• Fatigue strength
• Torsion strength
• Hardness
• Ductility
• Toughness

• Hardness testing
• Mechanical testing
• Tensile testing
• Positive material testing
• Pitting corrosion testing
• Intergranular corrosion testing

We supply fasteners along with credentials and documentation reports for assuring quality. these are mostly packed and supplied in the wooden cases, wooden cartons, wooden pallets, and woven bags. The extra covering of thin film of plastic is rolled to protect from a different type of contamination and rusting.



Heavy Hex Nuts

Heavy Hex Nuts





Following are the types of fasteners offered by us:


Grades and Specifications

Nickel Alloy Fasteners

  • Standard: ASTM / ASME SB 160 / 164 / 425 / 166 / 446 / 574 / 472

  • Grade: UNS 2200 (NICKEL 200) / UNS 2201 (NICKEL 201), UNS 4400 (MONEL 400), UNS 8825 (INCONEL 825), UNS 6600 (INCONEL 600) / UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276), UNS 8020 (ALLOY 20 / 20 CB 3)

Stainless Steel Fasteners

  • Standard: ASTM / ASME A/SA 193 / 194

  • Grade: B 8 (304), B 8C (SS 347), B 8M (SS 316), B 8 T (SS 321), A 2, A 4

High Tensile Fasteners

  • Longer serviceability

  • Superior polish

  • Precise dimension

  • Standard & customized shapes

Alloy Steel Fasteners

  • Standard: ASTM / ASME A/SA 193 / 194 GR

  • Grade: B 6, B 7/ B 7M, B 16, 2, 2HM, 2H, GR 6, B 7, B 7M

Duplex Steel

  • UNS NO.S 31803, S 32205


We have in store for our clients, a technically upgraded range of stainless steel nuts that is available in different types like nickel alloy fasteners, stainless steel fasteners, high tensile fasteners and many more. Designed in the size range of M12 to M150 and 1/2" to 6", these nuts are offered in the specifications of IS (GR.8.8, 10.9, 12.9) BS (GR. R, S, T), ASTM A193 (GR.B7) and ASTM A320.

The nut types offered by us are mentioned below:

  • Hexagon nuts
  • Hexagon coupling nuts
  • Hexagon thin nut
  • Square nut
  • Hexagon castle nuts
  • Self locking nut
  • Hexagon domed cap nuts


We have an exclusive range of stainless steel bolts that is used as industrial fasteners in several industries and sectors. Designed as per drawings and specifications detailed by our clients, these bolts are offered in the size range of M12 to M150 & 1/2" to 6". The specifications of these bolts are IS (GR.8.8, 10.9, 12.9,) BS (GR. R,S,T), ASTM A193 (GR.B7) and ASTM A320.

These stainless steel bolts are offered to our clients in the following types:

  • Stud bolt
  • Hex bolts
  • Square bolts
  • Eye bolts
  • Anchor bolts
  • T-head bolts
  • Structural bolts
  • U-bolts
  • J bolts
  • Mushroom head square neck bolts
  • Wing screw
  • Foundation bolts


We provide quality assured range of stainless steel washers that expedite the functionality of industrial applications. Offered in the size range of M12 to M150 & 1/2" to 6". Available in the specifications of IS (GR.8.8, 10.9, 12.9,) BS (GR. R, S, T), ASTM A193 (GR.B7) and ASTM A320, these washers are offered to our clients in the following types:

  • Plain washer
  • Plain big & small OD washer
  • Spring lock washer
  • Spring washer heavy duty
  • Tooth washer
  • Star washer
  • Tab washer with one & two tab


We are offer our clients an extensive range of stainless steel screws that is used as fasteners. These screws are offered in the size range of M12 to M150 and 1/2" to 6", and can be designed as per drawing and specifications detailed by our clients. We offer these screws in the specifications of IS (GR.8.8, 10.9, 12.9,) BS (GR. R, S, T), ASTM A193 (GR.B7) and ASTM A320.

Following are the various types of screws offered by us:

  • Pan head slotted screws
  • Cheese head slotted screws
  • Countersunk head slotted screws
  • Countersunk raised head slotted screws
  • Pan Phillips head screw
  • Countersunk Phillips raised head screws
  • Slotted cheese trim head machine screws
  • Socket head Allen cap screws
  • Allen countersunk socket head cap screws
  • Socket head shoulder screws
  • Socket head cap screw low head
  • Hexagon socket set screw with flat point
  • Hexagon socket set screws with cone point
  • Hexagon socket set screw with dog point
  • Hexagon socket set screws with dog point
  • Hexagon socket set screws with cup point
  • Imperial socket cap screws