A2 ST4.2 X 1.4 X 25 Self Tapping Stainless Steel Screws For Roofing Fastening

Product Details:

Place of Origin:	Zhejiang, China (Mainland)
Brand Name:	HNF
Certification:	ISO9001
Model Number:	DIN7504K

Payment & Shipping Terms:

Minimum Order Quantity:	10000 pcs
Price:	Negotiation
Packaging Details:	Box and Carton and Paller or Customize Packing
Delivery Time:	15-20days
Payment Terms:	L/C, T/T, Western Union
Supply Ability:	300 ton per month

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Detailed Product Description

Product Name:	A2 ST4.2 X 1.4 X 25 Self Tapping Stainless Steel Screws For Roofing Fastening	Material:	Stainless Steel 304
Head:	Hex Washer	Length:	25mm
Standard:	DIN7504K	Application:	Roofing Fastening
High Light:	Black Self Tapping Screws , Pan Head Framing Screws

A2 ST4.2 X 1.4 X 25 Self Tapping Stainless Steel Screws For Roofing Fastening

1.Product Description

Self-Drilling Screws are also commonly called: Tek Screws, Roofing Screws, Pro PointsSelf Tapping Screw, Drill Bit Tip Screws. Self-Tapping screws can cut their own threads as the screw is driven in to the material. They function by having a cutting edge which drills away the material, making a tiny hole for the screw to go into. This has nothing to do with the point of the screw but has everything to do with the threads which are designed to cut through the material. Similar to sheet metal screws, but they have a drill-shaped point to cut through sheet metal or steel which eliminates the need for drilling a pilot hole. These tek screws are designed for use in soft steel or other metals. Hex flange head self tapping screws generally made of C1022 carbon steel hardend or stainless steel SS410. It has an excellent drilling performance on hard material and sheet metals. C1022 steel self drilling screws could drill 1.5mm thick sheet metal while SS410 could drill even 5mm thick sheet metal. Hex flange head screws normally with a socke hex drive and also slotted drive options. There is some times an additional philips drive on the hex head. Please see below the guide dimensions for standard offers.

2. Specification

Product Dimensions	ST4.21x1.4x25
Pitch	1.4mm
Washer Thickness	0.8mm
Washer Diameter	8.1-8.8mm
Head Thickness	3.6-4.1mm
Opposite Side	6.78-7mm
Free Sample	Available, only shipping need to be charged

3.Application

General Fastening applications where need high strength and superior corrosion resistance. Typical applications Construction, Machine repairs outdoor. Designed for using in high-stress and high-strength applications. Zinc plated offers corrosion resistance and protection.

4.Advantages

Common chioce for fastening, which provide high tensile, offering high holding power and corrosion resistance. We stock many grades of fasteners ranging from low carbon steel on up to hardened, heat treated steel. Competitive prices with professional factory supply. Perfect fastening solution with 10 years experiences to solve your problem: Wide range of parts selection. Durability testing and critical technical design to enhance fasteners lifetime.

5.More pictures

A2 ST4.2 X 1.4 X 25 Self Tapping Stainless Steel Screws For Roofing Fastening 0