DIN 7981 Pan Head Tapping Screws with Cross Recess

DIN 7981 pan head cross recess self-tapping screws have a slightly rounded top and a flat support surface at the bottom. They have coarse threads and drill bits for cutting threads in pre-drilled, untapped holes.

DIN 7981 Specifications

• Current norm: DIN ISO 7049
• Equivalent norms: ISO 7049; CSN 021235; UNI 6954;

Type Phillips H

mm	P	a max	dk max	dk min	k	No.	M	t min	t max
ST2.2	0.8	0.8	4.3	4	1.3	1	2.4	1.1	1.35
ST2.9	1.1	1.1	5.5	5.2	1.7	1	2.8	1.48	1.73
ST3.5	1.3	1.3	6.8	6.44	2.1	2	4	1.6	2.06
ST3.9	1.3	1.3	7.5	7.14	2.3	2	4.2	1.85	2.31
ST4.2	1.4	1.4	8.1	7.74	2.5	2	4.4	2.05	2.51
ST4.8	1.6	1.6	9.5	9.14	3	2	5	2.64	3.1
ST5.5	1.8	1.8	10.8	10.37	3.4	3	6.3	2.72	3.18
ST6.3	1.8	1.8	12.4	11.97	3.8	3	7	3.38	3.84

Type Pozi Z

mm	P	a max	dk max	dk min	k max	k min	r max	No.	M	t min	t max
ST2.2	0.8	0.8	4.2	3.9	1.8	1.55	0.3	1	2.4	1.1	1.35
ST2.9	1.1	1.1	5.6	5.3	2.2	1.95	0.4	1	2.9	1.58	1.83
ST3.5	1.3	1.3	6.9	6.54	2.6	2.35	0.5	2	3.9	1.47	1.93
ST3.9	1.3	1.3	7.5	7.14	2.8	2.55	0.5	2	4.1	1.7	2.16
ST4.2	1.4	1.4	8.2	7.84	3.05	2.75	0.6	2	4.3	1.88	2.34
ST4.8	1.6	1.6	9.5	9.14	3.55	3.25	0.7	2	4.7	2.28	2.74
ST5.5	1.8	1.8	10.8	10.37	3.95	3.65	0.8	3	6.2	2.51	2.97
ST6.3	1.8	1.8	12.5	12.07	4.55	4.25	0.9	3	6.7	3.02	3.48

Related Products

Self Tapping Screws