Regulating Screw

Short Description:

PRODUCT NAME.: REGULATING SCREW
CORLOR: DUE TO ORDER
SIZE: DUE TO ORDER

Product Detail

Product Tags

Introduction

A screw is a fastener typically made of metal and characterized by a helical ridge, called a male thread (external thread). Screws are used to fasten materials by the engagement of the screw thread with a similar female thread (internal thread) in a matching part.

Screws are often self-threading (also known as self-tapping) where the thread cuts into the material when the screw is turned, creating an internal thread that helps pull fastened materials together and prevents pull-out. There are many screws for a variety of materials; materials commonly fastened by screws include wood, sheet metal, and plastic.

Most screws are tightened by clockwise rotation, which is called a right-hand thread. Screws with a left-hand thread are used in exceptional cases, such as where screw will be subject to counterclockwise torque, which would tend to loosen a right-hand screw. For this reason, the left-side pedal of a bicycle has a left-hand thread.

Details

Screws are usually made of steel. Where great resistance to weather or corrosion is required, like in very small screws or medical implants, materials such as stainless steel, brass, titanium, bronze, silicon bronze or monel may be used.

Galvanic corrosion of dissimilar metals can be prevented (using aluminum screws for double-glazing tracks for example) by a careful choice of material. Some types of plastic, such as nylon or polytetrafluoroethylene (PTFE), can be threaded and used for fastenings requiring moderate strength and great resistance to corrosion or for the purpose of electrical insulation.

A surface coating is used to protect the fastener from corrosion (e.g. bright zinc plating for steel screws), to impart a decorative finish (e.g. japanning) or otherwise alter the surface properties of the base material.

Selection criteria of the screw materials include: size, required strength, resistance to corrosion, joint material, cost and temperature.

Our Service

1.Q: Are you trading company or manufacturer ?
A: We are manufacturer and specializing in circuit breaker parts and components.

2.Q: How long is your delivery time?
A: Normally 5-10 days if there are goods in stock. Or it will take 15-20 days. For customized items, the delivery time depends.

3.Q: What is your terms of payment ?
A: 30% T/T in advance ,and the balance before shipment.

4.Q : Can you make customized products or packing?
A: Yes.We can offer customized products and packing ways can be made according to customer’s requirement.