Fasteners
A fastener is a hardware device that mechanically joins or affixes two or more objects
together. In general, fasteners are used to create non-permanent joints; that is, joints that
can be removed or dismantled without damaging the joining components. Steel fasteners
are usually made of stainless steel, carbon steel, or alloy steel.
MATERIAL: There are three major steel fasteners used in industries: stainless steel, carbon
steel, and alloy steel. The major grade used in stainless steel fasteners: 200 series, 300
series, and 400 series. Titanium, aluminium, and various alloys are also common materials
of construction for metal fasteners. In many cases, special coatings or plating may be
applied to metal fasteners to improve their performance characteristics by, for example,
enhancing corrosion resistance. Common coatings/platings include zinc, chrome, and hot-
dip galvanizing.
APPLICATION: When selecting a fastener for industrial applications, it is important to
consider a variety of factors. The threading, the applied load on the fastener, the stiffness of
the fastener, and the number of fasteners needed should all be taken into account.
When choosing a fastener for a given application, it is important to know the specifics of
that application to help select the proper material for the intended use. Factors that should
be considered include:
Accessibility
Environment, including temperature, water exposure, and potentially corrosive
elements
Installation process
Materials to be joined
Reusability
Weight restrictions
Fasteners Specification
| STANDARD SPECIFICATION | ASTM F593, F594, F1554 / ASME SF593, F594, F1554 |
|---|---|
| SIZE RANGE | UNS (IN INCH) = 3/16”-2” DIAMETER, UPTO 4” LENGTH METRIC (IN MM) = M2-M72 DIAMETER, UPTO 400MM LENGTH |
| THREAD | UNF, BSW, BSF, METRIC, UNC, or as required |
| SURFACE COATING | Phosphate Coating, Zinc Coating, Hot Dipped Galvanizing Coating, Cadmium Coating, Passivated |
| Test Certificate of SS Bolting |
as per EN 10204 / 3.1 Manufacturer Test Certificate |
| Packing of Fasteners |
IN BULK: canton, pallet, Small Boxs / carton / pallet, or customer request |
| STAINLESS STEEL | 300 SERIES, 400 SERIES AND SS904L |
|---|---|
| CARBON STEEL | GRADE 2, GRADE 5, GRADE 8 |
| ALLOY STEEL | ASTM A193 GRADE B7, GRADE B7M, A320 L7, L7M |
| DUPLEX & SUPER DUPLEX | DUPLEX 2205 AND SUPER DUPLEX 2507 |
| HIGH TENSILE | GRADE 8.8, GRADE 10.9, GRADE 12.9 |
| MILD STEEL | GRADE 4.6 & GRADE 4.8 |
| TITANIUM | GRADE 2 AND GRADE 5 |
| HASTELLOY | GRADE C276 AND GRADE G30 |
| MONEL | MONEL 400 AND K500 |
| INCONEL | INCONEL 625, INCONEL 718, INCONEL 725, INCOLOY 800 AND INCOLOY 825 |
| NICKEL ALLOY | NICKEL 200 |
