Galvanized hex head bolt

Specifications

Hexagon bolt is one of popular fastener and make a very important role in buliding and machinery and so on , which has a full threads including fine and coarse for use with nuts or in a tapped hole , it is also known as hex cap screws or machine bolts .

This hex bolt is made from steel with grade 4.8 , besides , it is also would be in 6.8 , 8.8 , 10.9 and top grade 12.9 , the tensile strength is able to go to 1200 N/mm2 and hardness is HRC 39 .

Standards

1.DIN

2. ISO

3. BSW

4. GB

5.JIS

How to choose hexagon bolt

In order to make hexagon bolt can work smoothly and in efficiency , make sure chosen nuts or tapped holes is suitable for specification of bolts , there is a micro difference between metric and british standard and between fine and coarse threads ; In addition , make sure no broken threads or stuffed threads .

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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 .

Specification

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 .

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 .

5) Paint .

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

6) bronze .

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

7) brass .

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

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

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 .

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 bolts etc .