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Zinc Plated Large Flat Head Drill Screw Self-drillng Screws

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Zinc Plated Large Flat Head Drill Screw Self-drillng Screws

We are committed to become the world's top fastening solutions provider, let Chinese prod-uct enterworld class, let the Chengyi production become synonymous with quality. To this end we need perseverance. At the same time, we also shoulder the responsibility of the society and the expectations of theemployees. In the future, we will become a respected enterprise.

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Name	Self drilling Screws	Materials	Carbon Steel/Stainless Steel
Standards	DIN ISO UNC BSW JIS etc.	Strength level	8.8 etc.
Size	M1.5-M6	Surface finish	ZP\BLACK etc.
Length	10-100	Samples	Available

Product Standards

Cross recessed countersunk head self-tapping self-drilling screws DIN 7504

Thread specification		ST2.9	ST3.5	ST4.2	ST4.8	ST5.5	ST6.3
P	pitch	1.1	1.3	1.4	1.6	1.8	1.8
a	maximum value	1.1	1.3	1.4	1.6	1.8	1.8
dk	maximum value	5.5	7.3	8.4	9.3	10.3	11.3
dk	minimum	5.2	6.9	8	8.9	9.9	10.9
k	maximum value	1.7	2.35	2.6	2.8	3	3.15
r	maximum value	1.2	1.4	1.6	2	2.2	2.4
slot number		1	2	2	2	3	3
M1 _		3.2	4.4	4.6	5.2	6.6	6.8
M 2		3.2	4.3	4.6	5.1	6.5	6.8
dp		2.3	2.8	3.6	4.1	4.8	5.8
Drilling range (plate thickness)		0.7~1.9	0.7~2.25	1.75~3	1.75~4.4	1.75~5.25	2~6
Lg (minimum)		-	-	-	-	-	-
①,Material: Manufactured from case-hardened steel as specified in DIN 17210 or quenched and tempered steel as specified in DIN EN 10083-1 and DIN EN 10083-2 (at the discretion of the manufacturer), equivalent grades are permitted.

About Us

We are committed to become the world's top fastening solutions provider, let Chinese product enterworld class, let the Chengyi production become synonymous with quality. To this end we need perseverance. At the same time, we also shoulder the responsibility of the society and the expectations of theemployees. In the future, we will become a respected enterprise.

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Our export countries include Russia, South Korea, Britain, France, Germany, Italy, Canada, Mexico,Brazil, Argentina, Chile, Australia, Indonesia, Thailand, Singapore, Saudi Arabia, Syria, Egypt, Tanzania,Kenya and other countries. Our products will be spread all over the world!