Products List
Self-Drilling Screw Supplier in Kolkata
Landmark Crafts (P) Ltd. one of the largest manufacturers of HP Self Drilling Screws, Aluminium Blind Rivets and Dry Wall Screws, the company is committed to achieve client’s satisfaction by consistently meeting their specific requirements and timely delivery. The company achieves this through continued training and adoption to new technology.
Landmark Crafts (P) Ltd. has two manufacturing units and currently employs around 60 senior technicians.
The factory at Anand Industrial Estate, is engaged in manufacturing of Blind Rivets & Dry Wall Screws and the one at Panchkula (Haryana) is engaged in production of Self Drilling Screws.
Landmark Crafts (P) Ltd. is also rated SME-1 by CRISIL & is accredited by D&B D-U-N-S
Self drilling screw selection for sheet metal and roofing
Self drilling screws save time because the drill point cuts its own pilot hole. The right screw depends on sheet thickness, substrate, drill point number, head style, washer type, coating, and whether the job is roofing, cladding, HVAC ducting, or light fabrication.
| Common supply | Hex washer head screws, pan head screws, wafer head screws, countersunk self drilling screws, EPDM washer roofing screws |
|---|---|
| Grades handled | Carbon steel hardened screws and stainless options as per application |
| Reference standards | DIN/ISO style self drilling screw patterns and application-specific drill point selection |
| Finishes | Zinc plated, Ruspert-type coatings where available, painted heads, and stainless options |
| Use cases | Roofing sheets, purlins, cladding, ducting, partitions, aluminium sections, and light steel fabrication |
Procurement checks before ordering
- Match drill point to sheet thickness; an undersized point burns out and an oversized point reduces holding.
- Use EPDM bonded washers for roofing to reduce leakage risk.
- For coastal or chemical exposure, ask for a higher corrosion-resistant coating instead of ordinary zinc.
- Do not use self drilling screws for heavy structural anchoring unless the system is designed for it.
Frequently asked questions
Do self drilling screws need pilot holes?
In most sheet metal applications they do not need separate pilot holes, provided the drill point is suitable for the material thickness.
Which head is used for roofing sheets?
Hex washer head screws with EPDM bonded washers are commonly used for roofing and cladding work.
Can you supply different lengths and coatings?
Yes. Length, head type, washer, and coating can be selected based on the job requirement and availability.
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