Self-tapping screw with semicircular head GOST-11650-80
The GOST-11650 self-tapping screw (self-tapping screw) is a fastener, which is a metal stud with a sharp end truncated at an angle of 40 degrees on one side and a semicircular head on the other. The thread of the part is large, single-threaded.The GOST–11650 screw is made of steel of strength class B. It is used for fastening thin sheet materials: soft wood, plastic, metal, textolite, chipboard and plywood. Hardware is most in demand in the automotive industry, construction, and is widely used to connect parts of household appliances. When installing, it must be taken into account that the diameter of the hole for fasteners must be 1 - 3 mm wider than the outer diameter of the thread of the self-tapping screw.
Characteristics
|
Nominal thread diameter
|
2,5
|
3
|
4
|
5
|
6
|
8
|
|
|
Head diameter
|
4,5
|
5,5
|
7,0
|
8,5
|
10,0
|
13,0
|
|
|
Head height
|
1,7
|
2,1
|
2,8
|
3,5
|
4,2
|
5,6
|
|
|
Head sphere radius
|
2,4
|
2,9
|
3,6
|
4,4
|
5,1
|
6,6
|
|
|
Slot width
|
nominally
|
0,6
|
0,8
|
1,0
|
1,2
|
1,6
|
2,0
|
|
Not less than
|
0,66
|
0,86
|
1,06
|
1,26
|
1,66
|
2,06
|
|
|
No more
|
0,80
|
1,00
|
1,20
|
1,51
|
1,91
|
2,31
|
|
|
slot depth
|
Not less than
|
0,9
|
1,0
|
1,6
|
2,1
|
2,3
|
3,3
|
|
No more
|
1,3
|
1,4
|
2,0
|
2,5
|
2,7
|
3,7
|
|
|
Phillips number
|
1
|
2
|
3
|
||||
|
Thread failure, no more
|
0,8
|
1,0
|
|||||
GOST documentation
