butterfly screw
DIN316
Diameter range: M4-M10 Length range: 8mm-60mm
| standard | DIN German standard |
|---|---|
| head shape | dish-shaped |
| Thread | Fully threaded |
| (mm) | M4 | M5 | M6 | M8 | M10 | M12 | M16 | M20 | M24 |
|---|---|---|---|---|---|---|---|---|---|
| P | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 | 3 |
| a(max) | 2.1 | 2.4 | 3 | 4 | 4.5 | 5.3 | 6 | 7.5 | 9 |
| dk(max) | 8 | 11 | 13 | 16 | 20 | 23 | 29 | 35 | 44 |
| dk(min) | 6 | 8 | 10 | 13 | 17 | 20 | 26 | 32 | 41 |
| d1(max) | 7 | 9 | 11 | 12.5 | 16.5 | 19.5 | 23 | 29 | 37.5 |
| d1(min) | 5.5 | 7.5 | 9 | 10.5 | 14.5 | 17.5 | 21 | 27 | 35 |
| H(max) | 20 | 26 | 33 | 39 | 51 | 65 | 73 | 90 | 110 |
| H(min) | 18 | 24 | 30 | 36 | 48 | 62 | 70 | 86 | 106 |
| y(max) | 1.9 | 2.3 | 2.3 | 2.8 | 4.4 | 4.9 | 6.4 | 6.9 | 9.4 |
| y(min) | 1.1 | 1.5 | 1.5 | 2 | 3.6 | 4.1 | 5.6 | 6.1 | 8.6 |
| y1(max) | 2.3 | 2.8 | 3.3 | 4.4 | 5.4 | 6.4 | 7.5 | 8 | 10.5 |
| y1(min) | 1.7 | 2.3 | 2.7 | 3.6 | 4.6 | 5.6 | 6.5 | 7 | 9.5 |
| h(max) | 10.5 | 13 | 17 | 20 | 25 | 33.5 | 37.5 | 46.5 | 56.5 |
| h(min) | 8.5 | 11 | 15 | 18 | 23 | 31 | 35 | 44 | 53.5 |
| k(max) | 4.6 | 6.5 | 8 | 10 | 12 | 14 | 17 | 21 | 25 |
| k(min) | 3.2 | 4 | 5 | 6.5 | 8 | 10 | 13 | 16 | 20 |
| Material | Tempered cast iron (GT) | Steel (St) | Copper-zinc alloy (CuZn) | |
| General technical conditions | DIN 267-1 | DIN 267-1 | DIN 267-1 | |
| Thread | tolerance | 6g：B | 6g：B | 6g：B |
| 7g：C | 7g：C | 7g：C | ||
| standard | DIN 13-13 | DIN 13-13 | DIN 13-13 | |
| Mechanical properties | Grade | GT=GTS-35-10 | St=Stahl | CuZn=G-CuZn40 Fe |
| Minimum tensile strength ≥400N/mm2 | ||||
| standard | DIN 1692 | DIN 17100 | DIN 1709 | |
| tolerance | Product grade | B: Surface processing | B: Surface processing | B: Surface processing |
| C: Unprocessed surface | C: Unprocessed surface | C: Unprocessed surface | ||
| standard | DIN ISO 4759-1 | DIN ISO 4759-1 | DIN ISO 4759-1 | |
| surface treatment | Without treatment; | Without treatment; | Without treatment; | |
| Electroplating technology requirements are in accordance with DIN 267-9; | Electroplating technology requirements are in accordance with DIN 267-9; | Electroplating technology requirements are in accordance with DIN 267-9; | ||
| If other surface treatment is required, it should be agreed upon by both parties. | ||||
| Acceptance and packaging | DIN 267-5 | DIN 267-5 | DIN 267-5 | |
