DIN 7983 Self-Tapping Screw with Cross Recess

The DIN 7983 self-tapping screw is used in construction and mechanical engineering for fastening products and materials to metal sheets and frames: without pre-drilling — up to 0.9 mm thick, with pre-drilling — up to 6 mm. It has a tight single-start or double-start self-tapping thread. For the head to sit flush, pre-countersinking is required. The DIN 7983 self-tapping screw is made of carbon electro-zinc-plated, yellow passivated steel or stainless steel. Equivalent: ISO 7051.

DIN 7983 raised countersunk head self-tapping screw

k	1.7	2.1	2.3	2.5	3.0	3.4
d1	5.5	6.8	7.5	8.1	9.5	10.8
n:o	1	2	2	2	2	3

L (mm)	d
	2.9	3.5	3.9	4.2	4.8	5.5
9.5
13
16
19
25
32
38
45
50

d	ST2.2	ST2.9	ST3.5	ST3.9	ST4.2	ST4.8	ST5.5	ST6.3
dk DIN/ISO	4.3/3.8	5.5	6.8/7.3	7.5/-	8.1/8.4	9.5/9.3	10.8/10.3	12.4/11.3
k DIN/ISO	1.3/1.1	1.7	2.1/2.35	2.3/-	2.5/2.6	3.0/2.8	3.4/3.0	3.8/3.15
PH, PZ	1	1	2	2	2	2	3	3
ISR	T6	T10	T15	T15	T20	T25	T25	T30
y form C	2	2.6	3.2	3.5	3.7	4.3	5	6
y form F	1.6	2.1	2.5	2.7	2.8	3.2	3.6	3.6

Designations:

d — thread diameter

dk — diameter of the raised countersunk head

k — height of the countersunk part of the head, max

f — height of the convex part of the head

PH, PZ — cross bit size

ISR — Torx bit size

y — tip length