Hexagon head Self-drilling Screw high strength 4.8 6.8 8.8 10.9 12.9 standard size DIN7504K self-drilling screw manufacture wholesale price

Short Description:

Brand Name: Yungchang
Price: On Qty
Min. Order Quantity: 1000pcs
Packaging: Bag/Box with Pallet
Shipping: by Express/Sea/Land/ Air
Delivery: 3-5days on Qty
Payment: T/T, LC
Capacity: 500T per Month

Product Description

Name	Self-drilling Screw
Place of origin	China
Size	M6,M8,M10,M12,M16,M18,M20 or non-standard as request& design
Length	25mm-100mm normal or non-standard as request& design
Finish	Plain,Black,Zinc White,Yellow,Blue White
Head Type	Hexagon Head
Material	Carbon Steel,Stainless Steel,Copper
Grade	4.8,6.8,8.8,10.9,12.9
Standards	GB/T,ASME,BS,DIN,HG/T,QB
Non-Standards	According to drawing or samples
Samples	Available
Payment	FOB,CIF
Port	Tianjin, Qingdao
Package	Standard export packing carton pallet or according to customer’s requirements
Usage	Mainly used in steel structure of color steel tile fixed or to connect and fix metal components. can also be used for simple building sheet fixed

Production advantages

(1) Generally made of carburized steel, can also be made of stainless steel or non-ferrous metal.

(2) The product must be heat treated. Carbon steel self-tapping screws must be carburized, stainless steel self-tapping screws must be solid solution hardening treatment. In order to make the tapping screw to meet the standard requirements of mechanical properties and performance.

(3) The product surface hardness is high, the core toughness is good. “Soft on the inside but tough on the outside”. This is a major feature of the performance requirements of self-tapping screws. If the surface hardness is low, can not be screwed into the matrix; Such as the core toughness is poor, a twist will be broken, can not be used. Therefore, “soft inside and rigid outside” is a self-tapping screw to meet the requirements of performance. (4) The surface of the product needs surface protection treatment, generally electroplating treatment. The surface of some products needs to be treated with phosphate (phosphating). For example: the wall panel self-tapping screws are mostly phosphorus air.

(5) The production of cold badge technology. It is recommended to use high speed cold turning machine and high speed wire rolling machine or high speed planetary wire rolling machine to ensure product quality. In this way, the head of the self-tapping screw is formed well and the thread quality is high.

Packing & Shipping:

1. Plastics,box,carton

2. Packing as customers’ request

Product Paramenters：

Specification

ST2.9

ST3.5

(ST3.9)

ST4.2

ST4.8

(ST5.5)

ST6.3

P	PITCH
a	MAX
c	MIN
d_c	MAX
d_c	MIN
e	MIN
k	MAX
k	MIN
k_w	MIN
r	MAX
s	MAX
s	MIN
d_p
Drilling range (plate thickness）

1.1	1.3	1.3	1.4	1.6	1.8	1.8
1.1	1.3	1.3	1.4	1.6	1.8	1.8
0.4	0.6	0.6	0.8	0.9	1	1
6.3	8.3	8.3	8.8	10.5	11	13.5
5.8	7.6	7.6	8.1	9.8	10	12.2
4.28	5.96	5.96	7.59	8.71	8.71	10.95
2.8	3.4	3.4	4.1	4.3	5.4	5.9
2.5	3	3	3.6	3.8	4.8	5.3
1.3	1.5	1.5	1.8	2.2	2.7	3.1
0.4	0.5	0.5	0.6	0.7	0.8	0.9
4	5.5	5.5	7	8	8	10
3.82	5.32	5.32	6.78	7.78	7.78	9.78
2.3	2.8	3.1	3.6	4.1	4.8	5.8
0.7~1.9	0.7~2.25	0.7~2.4	1.75~3	1.75~4.4	1.75~5.25	2~6

Manufacturing Technique

YungChang (YC) is a fastener manufacture enterprise, major product includes bolts, nuts, crews, pins, anchors, hose clamp, and special customized, use high quality raw material which originate from imported or domestic large-scale steel factory, the production applies advanced ERP management system and flexible operation model. By its top-grade talent and first-class producing equipment, High quality, various item, different colour and excellent service. The capacity per year is over 30 thousands tons, which is the main manufacturer of high strength fasteners in China, supplying products to European Union, Southeast Asia, Africa , Japan, Korea, and American markets.