FIELD: construction.
SUBSTANCE: self-drilling screw comprises a head (2), a rod (1), a thread (4) and a sharpened cutting end (3). The cutting end has a pair of cutting edges (5), passing on the side projection of the screw, substantially perpendicularly to the longitudinal axis of the screw, and an alignment spike (7) that protrudes forward beyond the cutting edges (5). The alignment spike (7) has pyramidal shape.
EFFECT: simple and very fast screwing even in very hard wood.
11 cl, 7 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SELF-DRILLING SCREW | 2008 |
|
RU2474734C9 |
| PLATE-TYPE DRILLING FOR SELF-DRILLING FASTENER | 1995 |
|
RU2134365C1 |
| SELF-CUTTING SCREW | 0 |
|
SU651721A3 |
| SELF-DRILLING FASTENING MEMBER | 1992 |
|
RU2087762C1 |
| METHOD FOR SETTING SCREW | 1995 |
|
RU2153605C2 |
| SELF-DRILLING SELF-TAPPING SCREW | 0 |
|
SU706589A1 |
| SELF-DRILLING BOLT WITH TEAR-OFF DRILLING PART | 2023 |
|
RU2818403C1 |
| SELF-DRILLING SCREW | 2009 |
|
RU2478840C2 |
| SCREW ELEMENT | 2014 |
|
RU2569769C9 |
| DEVICE FOR PROCESSING OF LONGITUDINAL EDGES OF MOVING FLAT METAL ARTICLE | 2006 |
|
RU2333819C2 |
