Stainless steel truss head weld screws

Specifications

Introduction

Truss head weld screw with a flat surface on the top of the head ,  three points under the head which can sunken into workpiece to stop the screw moving , be made of stainless  steel with good anti-rust performance .

Application

1) Household electrical appliances . TV , Washer , Cooker , Air conditioner etc.

2) Furniture . sofa , glass table , steel seat and table and decorative lighting etc .

3) Building . window and door , metal floor, steel structure and building beam etc

4) Heavy industry . Car , air , shipping , machinery and military equipments .

5) High technology industry . like automatic robots , Navigator and communication apparatus etc .

Advantage

1. Easy to operation .

every part of the screw is made carefully and keep them in the requested limitation so that it is very easy to be operated during use .

2. Much choice of the specification and design .

There are thousands of the sizes for the screws, and the points and the heads and drives can be designed specially to meet the different application .

3. Wide material sorts choosed .

Screws can be made of or from in different material that involves carbon steel , stainless steel , brass , alumiunum , copper and titanium etc .

4. Nice and smooth surface .

Screws are to be plated in different colors and which is also to be a anti-rust . and no any burrs .

5. Environmental protection .

All screws are meet the related environmental requirements from start to end .

6. Wide material sorts choosed .

Screws can be made of or from in different material that involves carbon steel , stainless steel , brass , alumiunum , copper and titanium etc .

Working standards

1. ISO

2. DIN

3. ANSI

4. GB

5. JIS

6. BSW

Specification

                                                                                                    table 1

 Head style option

Drive style option

Thread style option

Tips for use

1. Use a cross wrench to drive the screw .

 2. The thread moving direction is from right to left to drill into workpiece , and back out in reverse direction .

3. Do not use a sharp tool or bladed tool to drive the screws .

4. Do not scratch the screw in harden something in order to keep bright surface .

5. Keep the screw in the dry warehouse .

Finish options

Different fittings different finishs request , suitable finishs can make screws keep nice surface and anti-rust .

1) Zinc . this is the most popular treatment , the usual color cover black , silver , yellow and white . more colors see below color card .

2) Nickel . this is more good finish than zinc and is sole color , many parts are plated also in this finish .

                                                                                                          nickel finish

3) Oxidization . this finish is used for part stainless steel pieces , and the most alumiunm parts .

4) Polish . the parts will be more bright after polished , especially for stainless steel parts .

                                                                                                     polish

5) Paint . the color of paint is more abundant , it is more paint in different colors . partial paint and full paint for screws .

                                                                                  green painted on the head

6) bronze . this finish is very few used just for some special pieces .

                                                                                   bronze plated

7) brass . this finish has a good anti-rust and nice surface but more expensive than zinc .

                                                                                brass plated

The thickness of the different finishs

                                                                                                  table 2

Material introduction

1. Exceptional Anti-rust performace .

stainless steel material is good resistance from rust ,generally , finished goods can be anti-rusted over 72 hours under 96% salty sprey . so the most goods in outdoor or on seaside are choosed stainless steel as the first material .

As stainless steel contains nickel and chrome elementes , it is one of the best material that on resistance rust , especially for working surroundings with much acidity .

2. Nice surface .

goods are polished after finished forming . this is a good choice for ornamental parts . besides , stainless steel parts also can be finished in different colors per surface of fittings . In fact , stainless part itself has bright appearance .

3. Strong Strength .

As stainless steel has more "C" element , especially martensite stainless .

4. Antibiosis .

Most medical equipments are made from stainless steel as it can be up to 99% on killing bacteria .

5. Outstanding weldability .

The part under normal temperature is showing austenite status , and keep the perfect comprehensive performance .

6. High hardness .

Parts are made from alloy elements material .it is up to HRC58 or more high .

7. Resistance to abrasion .

High hardness ensures parts can resist abrasion during operation .

8. Enviromental protection .

Picked material and finish treatment are based on ROHS or GB standard .

Quality control

(1) Checking material before feed in

all material must be checked according to the requirements of products before put them onto the machines to ensure material is available .

(2) IPQC ( by handle and auto-machined control )

The semi-finished products must be checked in special tools during production , this ensure products are always under control .

(3) Chemical elements analysis and fhysical testing after post treatment

The most metal products need post treatment after finished proudct, all products will be tested after than to make sure the quality of products are meet the related requirement .

(4) The second inspection , sort all finished goods by sorting machines if required ;

All goods were finished , they must to be tested and checked before package ; In this phase , goods will be checked in full inspection or partial inspection . and checking methods can be by handle or auto-machines .

(5) Packing

Packed in polybags and cartons or in small color bags .

(6) Last inspection ( spot checking , packages status , quantity etc )

When all goods are ready , we will make a final inspection for quantity and package’s status .

(7) Delivery

Everything is ready , we will deliver goods to appointed place or port according talking

Packing

1. In bulk

                 chipboard cartons with belt on the outside

Items are packed in apparent polybags and solid cartons then , usually 3-5 bags in each carton and the gross weight is about 15 kilograms .

The sizes of the carton

20x28x16

16x18x25

20x22x28

16x18x28

Application

This package is usually for private use in the factory to assemble parts

Advantage

1) suitable for production line in the factory

2) big quanity each bag

3) low cost on package

2. Box

Items are packed in boxes inside and some boxes to a carton , the boxes would be colored or plain . 10-15 kilograms each carton . it contains plastic box and chipboard box . and both kinds of boxes can be print the customer’s logo .

                                                                                                                     table 2

Application

Box package is usually for sales in store .

Advantages

1) Individual packing

2) Customization design

3) Easy to sales

4) easy to check

5) easy to carry

6) not easy broken

7) beautiful apperance.

FAQ’s

Q. How about your capacity ?

A. With scale of ten thousand square meters , different processing machines , we are able to finish up to 2000 tons raw material every year , generally , one full 20 feet container ( about 20 tons) can be done in 20- 25 days .

Q.How long I can get samples for approval before placing order ?

A. Let you get and confirm samples in first time is our reponsiblity and pleasure , just in one week for new samples that need to be done in new tools , and we can deliver samples within 24 hours for exsiting samples once received your request .

Q.What are your popular payement menthods ?

A. T/T is our prior choose for all , of course , we are also accept L/C , Westunion , paypall .

Q. What production you produce ?

A. We are producing different screws like machine screws , self tapping screws , wood screws , stainles steel screws and self drilling screws etc and metal stamping parts and chipboard screw and thread cutting screws etc .