Shenzhen Qiangtuo Fastener Co., Ltd
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QT ISO9001:2015 annual audit successfully

QT ISO9001:2015 annual audit successfully

On July 13th ,this date which is QT 2019 annual ISO9001:2015 audit day. The below pictures are QT staffs and  the official staff from the regulator . ISO 9001:2015 specifies requirements for a quality management system when an organization: a) needs to demonstrate its ability to consistently provide products and services that meet customer and applicable statutory and regulatory requirements b) aims to enhance customer satisfaction through the effective application of the system, including processes for improvement of the system and the assurance of conformity to customer and applicable statutory and regulatory requirements. All the requirements of ISO 9001:2015 are generic and are intended to be applicable to any organization, regardless of its type or size, or the products and services it provides. As a qualified screws factory ,QT always put quality first,quality is our soul. As a reliable and trustworthy screws factory, we alywas try our best to meet customers' needs.

Valve equipment screws from QT Fastener

Valve equipment screws from QT Fastener

QT company has over 17 years screws producing experience. All kinds of machine screws are available. The below pictures are our application for the valve machines/equipment. Combination screws like GB9074.7 are widely and high volume used in the valve machines. Picture 01 Picture 02 Picture 03

QT screws  are highly appreciated by our clients

QT screws are highly appreciated by our clients

QT screws has over 17 years production experience. Widely used in various industries. QT machine screws are highly appreciated by our clients. (soldering machine/equipment) The below contents are pictures from one of our long-term cooperation customers. We are their golden supplier for many years. Picture 01-(screws on the circuit board) Picture 02-(client plant) Picture 03-(client plant)

Visiting our customer as a golden supplier

Visiting our customer as a golden supplier

On 18th Feb.,we were invited to one of our customers as their golden supplier. (pictures of certificates) The below pictures showed some of their starring products.(laser machine screws) Our QT Fastener factory is mainly professionally supplying all kinds of screws,bolts ,nuts  etc. We are golden supplier of many our customers. We always try our best to provide qualified products and competitive price. That is why more and more customers choosing us . Choosing QT, Choosing reliable partner,let's get a brighter future together.

Spring Festival holiday schedule

Spring Festival holiday schedule

Dear customers, Our company Spring Festival holiday will be during 2019.1.28-2019.2.12 . Totally 15 days. We will deliver the goods on Feb. 13. We sincerely apologize for the inconvenient to you. You can connect us when you need our help. HP/Skype/Whatsapp/Wechat:+8618813901699 Kindly note this pls. Shenzhen Qiangtuo Fastener Co., Ltd 

World market of QT

World market of QT

Shenzhen QT Fastener Co.,Ltd marketing network is all over the world. QT mainly supplys standard and non-standard fasteners pieces: machine screws,self tapping screws,nuts,bolts,pins,rivets,retaining rings etc. Over 17 years of factory producing experience, diversified standard and non-standard pieces can meet different needs,Get top quality machine screws,self tapping screws,etc,welcome to here.

QT team members in Shenzhen International marathon

QT team members in Shenzhen International marathon

CMSK OTC 2017 Shenzhen Baoan Intrenational Marathon One of the athletes of QT. All of the athletes take group photos QT fastener factory is producing various kinds of screws such as:machine screws,self tapping screws,nuts and bolts,washers,pins,rivets,retaining ring etc. Welcome your enquiry.

QT factory participating fire-drill

QT factory participating fire-drill

In order to prevent fire,our company participated fire-drill on 3 Sept 2018.This activity is organized by fire policeman. We all devote ourselves to take active part in this activity. QT always put management of safety production firstly. As we know that safety is the most important thing. We are appreciated by the administrative department. Production safety is our company's first priority.  Safe storage is our basic requirement. QT will follow the administrative policies . We will keep high standard safety management to reassure our customers. We are fastener factory producing machine screws,self tapping screws,nuts and bolts,washers,pins,rivets,retaining ring etc. Welcome your enquiry.

QT screws used for touch AD machine

QT screws used for touch AD machine

Touch AD machines are very popular nowadays. QT is an qualified supplier and reliable Machine Screws/nuts/bolts manufacturer in China. Our customers appreciate our products and services. Customers are our god,quality is our soul. QT will keep high quality standards all the time. Welcome your enquiry.

New Japanese cold heading screws machine

New Japanese cold heading screws machine

Our company always continuously uptimizes our eauipments to meet our customers' needs. This machine can produce high precision screws. QT provides all kinds of machine screws,self tapping screws. Welcome your enquiry.


China supplier GB849 Spherical washers

Spherical washer,Cone washer(GB849/GB850)

  • item no.:

  • payment:

    T/T, L/C,or others
  • market price:

  • price:

  • product origin:

  • MOQ:

  • color:

  • shipping port:

  • lead time:

    Based on the quantity
product details

GB849 Spherical washers

GB849 Spherical washers is a thin plate with holes. It is mainly used to distribute the load of threaded fasteners. It has wear resistance and can also be used as gasket, wear pad, locking device, preload indicator device, etc. It is twice as large as the inner diameter.

Our company is a professional GB849 Spherical washers supplier in China,widely used in food, automotive, industrial, heavy industry, oil, natural gas, In the retail and water treatment sectors.


Product name:spherical washers


Place of Origin











Plain,ZP,YZP,HDG,or customized

Carbon Steel,stainless steel or customized

Grades customized


OEM is available,according to drawings or samples

Samples are free

In standard exported packing,or according to customers' requirement

T/T,L/C,or others


Spherical washers application

Washers Series Show

Spherical washers

Machine screws:a machine screw is usually described as small diameter bolt. It features a straight ,untapered  shank and a blunt end. QT supply various kinds of machine screws.Standard and non-standard are available.
Self tapping screws:self tapping screws series including drywall screws,chipboard screws,self drilling tapping screws,sheet metal screws,wood screws.
Hex & Hex socket screws:both hex and hex socket screws are available. We have rich experience over 17 years.
Nuts: metric nuts  and customized sizes for your choosing.
Bolts: metric bolts and customized sizes, all kinds of types such as wing bolts,eye bolts,expansion bolts etc.

Others:washers,pins,rivets,retaining rings

Company profile

Spherical washers


Q1: What do you need to provide a quote?

A1: Please kindly send us the drawing of your product. Details should be included Materials,Surface Finish,Specifications and Quantity.

Q2: How does the payment process work?

A2: Payment terms are flexible for us in accordance with specific conditions. Generally we advise 50%TT deposit, balance be paid before shipment.

Q3: What will you do for after sales?

A3: When our metal parts apply to your products, we will follow up and await you feedback. Any question related to our metal parts, our experienced engineers are ready to help.

*welcome to visit our factory!

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