OEM Black Zinc Hexagon Socket Countersunk Round Self-Tapping Screw

Model NO.: Hexagon Socket Screw
Application: Machinery
Sample: Free
Stardard: GB, ISO, ASME, DIN, JIS ... ...
Trademark: other
Transport Package: Plastic Bag, Carton Box, Wood Pallet
Specification: Customized
Origin: Dongguan, China
HS Code: 7318150000
Production Description:
  • Carbon steel, Alloy steel, Stainless steel and Copper.
  • Non standard step screw
  • Cold forging process for manufacturing 
  • Core hardness: 360-430HV
  • Size : Customized
  • Thread type: machine type
  • Finish: Customized 
  • Marked: According to your requirements
  • Thickness of heat treatment: 0.1-0.2MM
  • SST: 72hrs min or higher
  • Industry: Mechanical, New Energy, Automotive, Communication Equipment, Automation Equipment......
  • Size and Material can be customized by your specific needs.
OEM Black Zinc Hexagon Socket Countersunk Round Self-Tapping Screw
OEM Black Zinc Hexagon Socket Countersunk Round Self-Tapping Screw

Product Catagory And Application:

We are the professional screw, bolt manufacturer for more than 11 years. So,
we have the ability to produce many kinds of screws and bolts, such as: special
long bolt (0-2000MM), endless long bolt, motor bolt, battery pole column, extended
attery cover screw, fastener,bicycle lengthen screws, tooth plate screw, sports
equipment screw, baby door adjusting screw, car safety seat screw,step screw,
stainless steel screw, non-standard special-shaped screw and etc.

1:  stainless steel plate, metal plate, galvanized steel plate, engineering installation.

2:  Metal light compartment and other indoor and outdoor installation. 

3:  General angle steel, iron plate and other metal materials combined installation. 

4:  Automobile engine, heavy machinery, garden machinery, petrochemical.

5:  Motorcycles, sports equipment, cars and many other industries.

6:  Electronics, electrical appliances, motors, lighting, communications, home appliances, furniture.

OEM Black Zinc Hexagon Socket Countersunk Round Self-Tapping Screw
OEM Black Zinc Hexagon Socket Countersunk Round Self-Tapping Screw

Quality Assurance:

We have the full quality contral system from raw material coming to finished
products. We set the IQC, IPQC, FQC to control each step of the production.
We have the professional quality engineer to monitor the product quality.
Of course, we have the enough high quality inspection equipments to measure
all the necessary control points for the each product. 

OEM Black Zinc Hexagon Socket Countersunk Round Self-Tapping Screw
OEM Black Zinc Hexagon Socket Countersunk Round Self-Tapping Screw

Q1:Are you a manufacture or trading company?
A: We are a professional hardware manufacturer.But, we have the right to do the import & export business.                      Actually, we have this experience for many years.
Q2:What kind of products do you produce?
A: We specializes in producing a variety of standard, non-standard screws, bolts, nuts and CNC lathe parts
Q3:What kind of material do you usually use?
A:We using carbon steels(low and medium carbon, alloy steels),stainless steel and brass.
Q4:Do you support customized products?
A:Sure, we can produce the customized products per your drawings and other requirements.
Q5:Can we print out own logo?
A:Yes, we can make it according to your request.
Q6:Can you provide samples?
A:For our regular products, we offer free samples.                                                                                                                                                                              For customized bolts, tooling and proofing charges need. All free samples not including its courier charge.
Q7:How to ensure that every process's quality?
A: We implement strict ISO quality control, and have 8 steps checking in production .                                                        We have our in-house QC daily and hire third party for randomly inspection.
Q8:What is the lead time of the product?
A:Generally 30-50 days after the deposit.
Q9:How about the trading term and payment term?
A:We can discuss this individually.
Q10:Do you have after service?
A:Certainly, you can contact us at any time.

The Style PVR pressure/Vacuum Relief Valve is a Sanitary Valve designed specifically for the brewing, beverage, food processing and pharmaceutical industries.


l Self-actuated operation.

l Relieves excess air or gas pressure.

l Relieves excess liquid pressure in the absence of air or gas blanketing.

l Designed to prevent vacuum formation that could cause the vessel to buckle.

l Body and all internal parts designed to operate after exposure to process fluids and withstand direct flushing and cleansing of sterilizing agents, caustics, water or steam.

l Allows complete drainage after operation and/or flushing and minimizes crevices which might trap contaminants or promote freezing in cold environments.

l All materials are corrosion resistant and all exposed surface finishes are controlled to enhance sanitary features.


1. Size: 1/2"- 6"
2. Material: SS304, SS316L
3. Standard: SMS,DIN,3A,IDF,ISO or according to customer request.
4. Connection: Butt-welded,clamped,threaded

5. Cartridge and body: Forge
6. Seal: Food Rubber

Tank Pressure Vacuum Relief Valve

1.Are you a trader or manufactory?
 We are a manufactory (Own Forging workshop and CNC machining workshop )
2.Can your products reach to FDA , CE and 3A requirements?
Yes, all of our material can reach to the requirements of FDA, ISO and 3A Certificate).

3.We can supply:
Sanitary Butterfly Valve, Sanitary Check Valve and Diaphragm Valves, as well as Various Tank Accessories:  Sight Glass, Strainers/Filter, Cleaning Ball, And other Pipe Fittings , (Pipe Unions: SMS, DIN, IDF, RJT, 3A,DS; Fittings: Ferrule,Elbow, Tee, Reducer and all other Non-standrad fittings), each products are tested well by our strictly Quality Control System, and we also have excellent service to support you and promote your business.
4.Lead Time:
For large quantity, as usual, it can be sent out within 20-40 days.
Small parcel will be dispatched by DHL, FedEx, UPS OR TNT Courier.
Big cargo will be delivered by Air freight or By Sea.
5.Our Service:
About payment:
Payment methods: L/C, T/ T, Paypal,Western Union

6.About samples:
We can provide samples production and service. Usually 2 to 5 days, the sample can be sent to your hands. We will choose the shipping way as you required: By sea, by air or by express. Any question about samples, please contact us.

7.For OEM products:
We will finish the production within 20-40 days after payment has been confirmed.
About delivery and shipping:
We will choose the delivery way as you required: By sea, by air, by express ect. Save your cost is our mission.

Any question or problem will be respond within 12 hours.

9.Lifetime service:
Any problem happened to our product, we will do our best to help client to solve it, spare parts will be half price in lifetime.

10.Problem solve:
If you can't solve the problem in your local, please delivery the product to us, we will repair it and then back to you.

11.Quality control:
All the products are calibrated with real working condition, and tested before shipping as qualified product.

12.Purpose:Attitude is everything.

Tank Pressure Vacuum Relief Valve

Vacuum Relief Valve,Stainless Steel Relief Valves,Stainless Steel Valve,Pressure Relief Valve

Wenzhou Qili Fluid Equipment Co., Ltd. , https://www.qlssvalve.com