Professional China Nylon Expansion Screw - JIS zinc plated Self Tapping Screw wholesale – Tonghe

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Professional China Nylon Expansion Screw - JIS zinc plated Self Tapping Screw wholesale – Tonghe Detail:

Introduction

Self-tapping screws have a wide range of tip and thread patterns, and are available with almost any possible screw head design. Common features are the screw thread covering the whole length of the screw from tip to head and a pronounced thread hard enough for the intended substrate, often case-hardened.
For hard substrates such as metal or hard plastics, the self-tapping ability is often created by cutting a gap in the continuity of the thread on the screw, generating a flute and cutting edge similar to those on a tap. Thus, whereas a regular machine screw cannot tap its own hole in a metal substrate, a self-tapping one can (within reasonable limits of substrate hardness and depth).
For softer substrates such as wood or soft plastics, the self-tapping ability can come simply from a tip that tapers to a gimlet point (in which no flute is needed). Like the tip of a nail or gimlet, such a point forms the hole by displacement of the surrounding material rather than any chip-forming drilling/cutting/evacuating action.
Not all self-tapping screws have a sharp tip. The type B tip is blunt and intended for use with a pilot hole, often in sheet materials. The lack of a sharp tip is helpful for packaging and handling and in some applications may be helpful for reducing the clearance necessary on the reverse of a fastened panel or for making more thread available on a given length screw
Self-tapping screws can be divided into two classes; those that displace material (especially plastic and thin metal sheets) without removing it are termed thread-forming self-tapping screws; self-tappers with sharp cutting surfaces that remove the material as they are inserted are termed self-cutting.
Thread-forming screws may have a non-circular plan view, such as the five-fold symmetry of the pentalobular or three-fold symmetry for Taptite screws.
Thread-cutting screws have one or more flutes machined into their threads, giving cutting edges.

packaging & delivery

Packaging Details:
1) Sample order, 20/25kg per carton with our logo or neutral package;
2) Large orders, we can custom packaging;
3) Normal Packing: 1000/500/250pcs per small box. then into cartons and pallet;
4) As customers’ require.
Port:Tianjin, China
Lead Time:

in stock No stock
15 working Days To be negotiated

Product detail pictures:

Professional China Nylon Expansion Screw - JIS zinc plated Self Tapping Screw wholesale – Tonghe detail pictures

Professional China Nylon Expansion Screw - JIS zinc plated Self Tapping Screw wholesale – Tonghe detail pictures

Professional China Nylon Expansion Screw - JIS zinc plated Self Tapping Screw wholesale – Tonghe detail pictures


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We usually keep on with the principle "Quality To start with, Prestige Supreme". We've been fully committed to offering our purchasers with competitively priced excellent solutions, prompt delivery and skilled support for Professional China Nylon Expansion Screw - JIS zinc plated Self Tapping Screw wholesale – Tonghe, The product will supply to all over the world, such as: Surabaya, Auckland, United Arab emirates, Being the top solutions of our factory, our solutions series have been tested and won us experienced authority certifications. For additional parameters and item list details, be sure to click the button to acquire additional nformation.
  • The sales manager is very patient, we communicated about three days before we decided to cooperate, finally, we are very satisfied with this cooperation!
    5 Stars By Jerry from Hyderabad - 2018.11.06 10:04
    This company conforms to the market requirement and joins in the market competition by its high quality product, this is an enterprise that have Chinese spirit.
    5 Stars By Faithe from Naples - 2018.11.04 10:32

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