Fastener Guides
Straight answers on choosing, specifying and buying fasteners, from the team that has supplied industry in Chennai since 1994.
How to Request a Fastener Quote
A complete fastener enquiry names the type, size, material or grade, finish, standard and quantity, plus delivery location and date. With these details a supplier can quote accurately the same day.
Read guideTypes of Screws and Their Uses
Screws are grouped by what they fix: self drilling and roofing screws for steel, self tapping and machine screws for sheet metal and tapped holes, wood, chipboard and drywall screws for timber and board, and concrete screws for masonry.
Read guideTypes of Nuts and Their Uses
Hex nuts are the standard; lock nuts such as nylock and all-metal nuts resist vibration; flange, dome and wing nuts suit special jobs; and weld, rivet and cage nuts add threads to sheet metal.
Read guideTypes of Bolts and Their Uses
The main bolt types are hex bolts for general work, allen bolts for machines, carriage bolts for timber, flange bolts for assembly lines, structural bolts for steel frames, U bolts for pipes, eye bolts for lifting and foundation bolts for concrete.
Read guideChoosing Fasteners for Coastal Chennai
Near the sea, plain and zinc plated steel fasteners rust within months. Use SS 316 for exposed and marine parts, hot dip galvanized steel for structures, and avoid mixing metals.
Read guideMild Steel vs High Tensile Bolts
High tensile bolts are hardened and tempered and carry far more load than mild steel bolts. Use high tensile bolts for structures, machinery and vehicles; mild steel bolts only for light, non-critical fixing.
Read guideStainless Steel Fastener Grades Explained
SS 202 is an economical grade for indoor use, SS 304 resists rust for general indoor and outdoor work, and SS 316 adds molybdenum for sea water and chemicals. In coastal Chennai, choose SS 316 for anything exposed to sea air.
Read guideWedge Anchor vs Chemical Anchor
Wedge anchors are quick to install and carry high loads in solid, uncracked concrete away from edges. Chemical anchors bond with resin, so they work near edges, in cracked concrete and in hollow masonry, at the cost of curing time.
Read guideSelf Drilling vs Self Tapping Screws
A self drilling screw has a drill point and makes its own hole in steel; a self tapping screw forms a thread in a hole you have already drilled. Use self drilling screws for roofing and steel framing, self tapping screws for sheet metal and plastics.
Read guideHow to Choose the Right Anchor for Concrete and Masonry
Pick the anchor by base material and load: wedge or chemical anchors for heavy loads in solid concrete, sleeve anchors for brick and block, drop-in anchors for overhead hangers, and plugs for light fixtures.
Read guideDifference Between DIN and ISO Bolts
DIN and ISO bolts are made to German and international standards. For most common bolts they are interchangeable in strength and thread, but a few sizes have different spanner (across flats) dimensions.
Read guideTypes of Fasteners Used in Construction
Construction uses five main fastener families: foundation bolts cast into concrete, anchor fasteners drilled into it, structural bolts for steelwork, threaded rods for services, and screws for roofing and interiors.
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