Product Details

Specifications

1. bright yellow zinc plated
2. Kinds of mateial to choose
3. Different quantity requirement is workable
4. Best price

Introduction

Pan head SEMS screw with abrasion flat washer under the head design to stop the screw is screwed out easy ,four nibs with machine threads is available for metal workpieces .

Advantages

1. Perfect anti-loose function .

this is the best function of the SEMS screw, there is a flat washer on the threads which can stop screw was sliped or backed when screwed into pieces . .

2. Easy installation .

standarded or special customization ensures the installation will be more easy .

3. Solid stability .

pieces are made from good material .

4. Effective working .

strict sizes controlled to make sure the pieces can be easy to on the automact production line .

5. Long-service .

pieces are made in advantage process and strict post treatment .

6. Eco-friendly .

pieces meet the related environmental requirements .

7. Sole design .

The key role of the SEMS screw is to be a anti-loose " maker" , the design is quite different from other screws .

8. 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 .

9. 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 .

Application

1)Household electrical appliances , like heater water , electric cooker , water dispenser , gas oven ice box and TV 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) Electronic product .computer , calculator , telecontroller and phone etc

Working standards

1. ISO

2. DIN

3. ANSI

4. GB

5. JIS

6. BSW

Specification

d	P	L
#0	80	3-5
#1	64	4-8
#2	64	4-10
#3	48	5-12
#4	40	5-15
#5	40	8-20
#6	32	8-25
#7	32	8-30
#8	32	10-30
#10	24	10-60
1/4	20	15-80
5/16	18	20-100
7/16	14	30-200

table 1

Head style option

Drive style option

Thread style option

Tips for use

1. Use a socket 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

finish	thickness/um
zinc	8-10
nickel	8-10
oxidization	5
polish	10-15
brass	10
gold	5

table 2

Material introduction

Carbon steel is one the best popular material in the hardware , machine scew will be more harden afer quenched in carbon steel , and improve the performance and function of the screws .

1. Perfect stability .

Inside components and instructure of part are reformed after quenching , keeping this status long time , and that make part satisfied expect requirements .

2. Low cost .

As spring steel is easy to make and full automated production ,

3. Easy to oparation .

Simple structure and strict tolerances.

4. Nice appearance .

Parts were plated after forming and also can be coated different colors based on request of fittings .

5. Enviroment friendly .

All chemical elements and surface treatment are meet for the relative standards .eg , GB , ROSH etc .

6. Resistance of oxidation.

Part with “V”chemical element , and also can do oxidize surface treatment to improve resistance for oxidation .

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 .

size	pcs/box	boxes/carton
15x10x10	50-200	10-20
10x10x10	50-200	10-20
13x10x8	50-200	10-15
15x15x10	50-200	10-20

table 3

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 SEMS screws etc .