Grooved Cylindrical Head Sheet Thread (DIN 7971)
Equivalent Standard: ISO 1481 | UNI 6591
We BRK Industries are the leading manufacturer and supplier of stainless-steel pan head slotted drive tapping screws in various diameters, lengths & finishes as per customer requirements. Our din 7971 self-tapping screws are made of high-quality stainless-steel material. This self tapping screws are screws that have a thread on the shank that is designed to form its own thread in a tapped hole.
Pan Slotted Fasteners is an abbreviation for Pan Slotted Screws, which refers to the type of screws used in construction industry such as steel structure, wooden structure etc. These screws can be used for fastening various types of materials such as wood, metal and concrete etc.
They are widely used in various industries like construction industry, automotive industry and others because they provide high strength against corrosion etc.
- DIN 7971
- Material Grade: MILDSTEEL
- Finish: BZP
- Thread: METRIC
DIN 7971
Metric DIN 7971 Pan Head Slot Drive Self Tapping Sheet Metal Screws are thread forming screws that tap their own threads in the substrate into which they are driven – usually thin metal. The slot drive accepts a single blade slot screwdriver ideal for simple manual applications. DIN 7971 Pan Head Slot Drive Self Tapping Sheet Metal Screws are to be used with pre-drilled, punched or nested pilot holes in sheet metal or other solid materials. BRK Industries offers the following sizes for immediate delivery from stock: Diameters ranging from M2.2 to M6.3 up to 70mm in length and available in A2 stainless steel.
Technical Specification for DIN 7971 Grooved Cylindrical Head Sheet Thread
| 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 | nominal | 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 | Trade sizes | ||||||||||||
| Nominal | Type C | Type F | |||||||||||
| 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 | + | + | |||||||