hexagon head self-drilling Screw 1. hardened drill point 2. with/without seal washer 3. zinc/yellow zinc/HDG finish

Heagon Head Self-drilling Screw:

1)with material of ordinary carbon steel and stainless steel;

2)surface treatment  of galvanized ,hot galvanized and dacrotized are available;

3)convenient and efficient ,collection can be completed together with drilling.

Screw Thread Specs	Screw Thread Specs	ST3.5(6#)	ST3.9(7#)	ST4.2(8#)	ST4.8(10#)	ST5.5(12#)	ST6.3(14#)
De	Max	8.3	8.3	8.8	10.5	11.0	13.2
De	Min	7.6	7.6	8.1	9.8	10	12.2
K	Max	3.45	3.45	4.3	4.45	5.45	6.45
K	Min	3.2	3.2	4	4.15	5.15	6.15
S	Max	5.5	5.5	7	8	8	10
S	Min	5.32	5.32	6.78	7.8	7.78	9.78
L	19MM-250MM

hexagon head self-drilling Screw