Fasteners
Bolts, screws, nuts, studs and washers in standard and special forms, in carbon steel, alloy steel and stainless steel.
About fasteners
Ludhiana and other Indian fastener clusters supply standard fasteners to international dimensions and special fasteners to the buyer's drawing. Standard lines include hex bolts and screws, hex nuts, studs, threaded rod and washers; special lines include shouldered bolts, flange bolts, studs with non-standard lengths and bolts with special heads or drilled holes.
Fasteners are made in property classes agreed on the drawing, with the surface finish you specify. Material certificates are supplied if you ask for them.
Types
- Hex head bolts and set screws
- Socket head cap screws
- Hex nuts, flange nuts and lock nuts
- Studs and double-ended studs
- Threaded rod (stud bar)
- Plain, spring and flat washers
- Special bolts, studs and inserts to drawing
Materials
- Carbon steel
- Alloy steel
- Stainless steel (austenitic grades)
- Brass
- Aluminium
Standards
- Property classes to ISO 898-1 for steel fasteners, from makers who work to them
- Stainless fastener grades to ISO 3506, from makers who work to them
- Dimensional standards such as ISO, DIN and ASME, as named on your drawing
- EN 10204 3.1 material certificate, supplied if you ask for it
Options
- Your drawing or a standard designation
- Plain, plated or coated finishes
- Marking of the head as per your drawing
- Packing in boxes of fixed quantities, retail packs or bulk cartons
Packaging
- Small boxes or bags of a fixed count
- Export cartons with a rust-preventive wrap
- Palletised and strapped, or wooden pallets for heavy loads
Documents
- Commercial invoice
- Packing list
- Certificate of origin
- Bill of lading or air waybill
- EN 10204 3.1 material certificate
- First-article inspection report
Specification
| Item | Detail |
|---|---|
| Thread | Metric, UNC, UNF or BSW as per your drawing |
| Strength class | As on the drawing, for example property classes 8.8, 10.9 and 12.9 for steel and A2 or A4 for stainless |
| Surface finish | Plain, zinc plated, hot-dip galvanised, black oxide, phosphate or passivated |
| Inspection | Dimensional and thread check against the drawing, with first-article approval before the run |
| HS code | 7318 (screws, bolts, nuts, washers and similar articles of iron or steel) |
More in precision hardware made to your drawing
Turned parts
Round components turned from bar to your drawing, such as pins, bushes, spacers, sleeves and shafts.
CNC machined parts
Milled and turned components made to your drawing in steel, stainless steel, aluminium and brass.
Gears and shafts
Spur, helical, bevel and worm gears, racks, splined shafts and couplings for general industrial machinery.
Pump and valve components
Machined and cast parts for ordinary industrial pumps and valves: impellers, shafts, sleeves, glands, stems and bodies.