Vimal Industrial Corporation is a leading stockist and supplier of DIN 7971 self-tapping screws based in Mumbai, India. Complying with DIN 7971 standards, these screws are designed with slotted, countersunk heads and thread-forming geometry that allows them to cut into thin sheet metals, plastics, and light alloys without pre-tapped threads. Their countersunk profile ensures a flush fit with the workpiece surface, providing both functional strength and a clean finish.
With a broad inventory covering multiple sizes, materials, and protective finishes, we support the needs of OEMs, electrical panel builders, fabricators, contractors, and MRO teams looking for reliable fastening solutions that combine ease of use with consistent quality.
As India’s electrical, fabrication, and consumer goods industries continue to require traditional slotted fasteners for sheet-metal assemblies, DIN 7971 screws remain widely used. Vimal Industrial Corporation partners with reputed manufacturers—including APL Fasteners—to maintain an extensive, ready-to-ship stock that conforms to DIN requirements.
Our Mumbai warehouse ensures screws are stored in climate-controlled conditions and supplied with lot-traceability, mill test certificates, and third-party inspection reports where needed. With same-day dispatch available through our pan-India logistics network, we support urgent maintenance needs, scheduled EPC projects, and OEM production runs.
DIN 7971 screws are suited to assemblies that require flush-mounted fastening with slotted drives:
Electrical Panels & Switchgear – sheet-metal covers, mounting plates, and control boxes.
Consumer Appliances – housings, enclosures, and casing assemblies.
HVAC & Ventilation Systems – duct panels and brackets requiring flush fastening.
Automotive & Transport Interiors – dashboard panels, trim, and fixtures.
Sheet-Metal Fabrication – cabinets, kiosks, and general enclosures.
General Engineering & MRO – workshop repairs and retrofit jobs using slotted drive tools.
With decades of expertise in the fasteners trade, Vimal Industrial Corporation is trusted across India for quality sourcing, dependable supply, and technical guidance.
Why clients choose us:
✅ Authorized APL Fasteners Dealer – guaranteed authentic products with full documentation
✅ Comprehensive Inventory – full range of diameters, lengths, and finishes available ex-stock
✅ Custom Packing & Bulk Fulfilment – bar-coded cartons, kit assortments, or palletized exports
✅ Technical Support – guidance on torque, drive selection, and sheet thickness suitability
✅ Pan-India Reach – rapid delivery from Mumbai warehouse to industrial hubs nationwide
✅ Stringent QA – screws supplied with inspection certificates and ISO-compliant reports
✅ Customer-First Approach – quick response, dedicated managers, and export facilitation
Whether for OEM production, contractor supply, or MRO requirements, we simplify procurement of DIN 7971 self-tapping screws with reliable quality and on-time delivery.
| Thread | ST 2,2 | ST 2,9 | ST 3,5 | ST 4,2 | ST 4,8 | ST 5,5 | ST 6,3 | ST 8 | ST 9,5 |
|---|---|---|---|---|---|---|---|---|---|
| P | 0,8 | 1,1 | 1,3 | 1,4 | 1,6 | 1,8 | 1,8 | 2,1 | 2,1 |
| a max. | 0,8 | 1,1 | 1,3 | 1,4 | 1,6 | 1,8 | 1,8 | 2,1 | 2,1 |
| da max. | 2,8 | 3,5 | 4,1 | 4,9 | 5,5 | 6,3 | 7,1 | 9,2 | 10,7 |
| dk | max. 4 | 5,6 | 7 | 8 | 9,5 | 11 | 12 | 16 | 20 |
| min. 3,7 | 5,3 | 6,6 | 7,6 | 9,1 | 10,6 | 11,6 | 15,6 | 19,5 | |
| k | max. 1,3 | 1,8 | 2,1 | 2,4 | 3 | 3,2 | 3,6 | 4,8 | 6 |
| min. 1,1 | 1,6 | 1,9 | 2,2 | 2,7 | 2,9 | 3,3 | 4,5 | 5,7 | |
| n | nom. 0,5 | 0,8 | 1 | 1,2 | 1,2 | 1,6 | 1,6 | 2 | 2,5 |
| max. 0,7 | 1 | 1,2 | 1,51 | 1,51 | 1,91 | 1,91 | 2,31 | 2,81 | |
| min. 0,56 | 0,86 | 1,06 | 1,26 | 1,26 | 1,66 | 1,66 | 2,06 | 2,56 | |
| r min. | 0,1 | 0,1 | 0,1 | 0,2 | 0,2 | 0,25 | 0,25 | 0,4 | 0,4 |
| rf approx. | 0,6 | 0,8 | 1 | 1,2 | 1,5 | 1,6 | 1,8 | 2,4 | 3 |
| t min. | 0,5 | 0,7 | 0,8 | 1 | 1,2 | 1,3 | 1,4 | 1,9 | 2,4 |
| w min. | 0,5 | 0,7 | 0,8 | 0,9 | 1,2 | 1,3 | 1,4 | 1,9 | 2,4 |
| y | Type C 2 | 2,6 | 3,2 | 3,7 | 4,3 | 5 | 6 | 7,5 | 8 |
| Type F 1,6 | 2,1 | 2,5 | 2,8 | 3,2 | 3,6 | 3,6 | 4,2 | 4,2 |
| L Nominal |
Type C | Type F | Trade sizes | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min. | max. | min. | max. | |||||||||||
| 4,5 | 3,7 | 5,3 | 3,7 | 4,5 | + | |||||||||
| 6,5 | 5,7 | 7,3 | 5,7 | 6,5 | + | + | + | |||||||
| 9,5 | 8,7 | 10,3 | 8,7 | 9,5 | + | + | + | + | + | |||||
| 13 | 12,2 | 13,8 | 12,2 | 13 | + | + | + | + | + | + | + | |||
| 16 | 15,2 | 16,8 | 15,2 | 16 | + | + | + | + | + | + | + | + | + | |
| 19 | 18,2 | 19,8 | 18,2 | 19 | + | + | + | + | + | + | + | + | + | |
| 22 | 21,2 | 22,8 | 20,7 | 22 | + | + | + | + | + | + | + | |||
| 25 | 24,2 | 25,8 | 23,7 | 25 | + | + | + | + | + | + | + | |||
| 32 | 30,7 | 33,3 | 30,7 | 32 | + | + | + | + | + | + | ||||
| 38 | 36,7 | 39,3 | 36,7 | 38 | + | + | + | |||||||
| 45 | 43,7 | 46,3 | 43,5 | 45 | + | + | ||||||||
| 50 | 48,7 | 51,3 | 48,5 | 50 | + | |||||||||
DIN 7971 self-tapping screws are slotted countersunk head fasteners designed to cut their own mating threads in sheet metals, plastics, and light alloys. Their countersunk head ensures a flush finish, making them suitable for applications where both performance and clean aesthetics are important.
DIN 7971 screws are produced in thread diameters from 2.2 mm to 9.5 mm and nominal lengths ranging from 4.5 mm up to 50 mm. The standard specifies tolerances for head geometry, thread depth, and countersunk angles, ensuring compatibility across global manufacturing and maintenance industries.
DIN 7971 screws are typically manufactured from case-hardened carbon steel for standard use and stainless steel (A2, A4 grades) for enhanced corrosion resistance. Popular finishes include zinc plating, nickel coating, black oxide, and plain/oiled, depending on environmental exposure and torque requirements.
These screws are widely used in electrical panels, consumer appliances, HVAC systems, automotive interiors, and sheet-metal fabrication. Their slotted drive design makes them compatible with traditional tools, making them a practical choice for both OEM assembly lines and MRO (maintenance, repair, and overhaul) operations.
As an authorized APL Fasteners dealer and leading stockist in Mumbai, Vimal Industrial Corporation offers a complete range of DIN 7971 screws with same-day dispatch. Customers benefit from climate-controlled storage, mill test certificates, lot traceability, third-party inspections, and pan-India delivery, ensuring fast, reliable, and documented supply for every project.
