DIN 7981 ISO 7049 Yıldız Silindir Başlı Sac Vidası

Dimensions in mm – source Din 7981
Publication date: 08/1990 – Supersedes DIN 7981: 12/1984
Ø thread size	P	dk max	dk min	k max	k min	recess nr.	Type H m ref.	Type Z m ref.	y type C	y type F
2.2	0.8	4.2	3.9	1.8	1.55	1	2.6	2.4	2	1.6
2.9	1.1	5.6	5.3	2.2	1.95	1	3	2.9	2.6	2.1
3.5	1.3	6.9	6.54	2.6	2.35	2	4.2	3.9	3.2	2.5
3.9	1.4	7.5	7.14	2.8	2.55	2	4.4	4.1	3.5	2.7
4.2	1.4	8.2	7.84	3.05	2.75	2	4.6	4.3	3.7	2.8
4.8	1.6	9.5	9.14	3.55	3.25	2	5	4.7	4.3	3.2
5.5	1.8	10.8	10.37	3.95	3.65	3	6.5	6.2	5	3.6
6.3	1.8	12.5	12.07	4.55	4.25	3	7.1	6.7	6	3.6

Din 7981 – ≈ weight in kg x1000 pcs, (ρ=7,85 kg/dm³) – commercial sizes
d thread size	ST 2.2	ST 2.9	ST 3.5	ST 3.9	ST 4.2	ST 4.8	ST 5.5	ST 6.3
nominal length l
4.5	0.174
6.5	0.214	0.424
9.5	0.274	0.532	0.84	1.07	1.26	1.85
13	0.344	0.658	1.02	1.29	1.5	2.18	3.24	4.32
16	0.404	0.766	1.17	1.48	1.71	2.46	3.62	4.86
19		0.874	1.32	1.67	1.92	2.74	4	5.4
22			1.47	1.86	2.13	3.02	4.38	5.94
25			1.62	2.05	2.34	3.3	4.76	6.48
32					2.84	3.96	5.67	7.74
38						4.52	6.45	8.82
45
50