OEM Custom Carbon Steel Knurled /Hex Socket Head/Screw with Washer Bolt

• Customization: Available
• Material: Carbon Steel
• Type: Hexagon Head
• Model NO.: Metal Stamping Parts
• Groove: Hexagon
• Connection: Common Bolt
• Head Style: Hexagonal
• Standard: DIN, GB, ANSI, BSW, JIS, GOST
• Grade: 12.9
• Size: Custom as Per The Drawing or Sample
• Tolerance: Generally +/-0.1mm
• Color: as Per Your Request
• Model No.: OEM
• Transport Package: Carton Box + Wooden Case
• Specification: Customizable Size
• Trademark: Hengjin
• Origin: China
• HS Code: 7326901000
• Production Capacity: 50000/Month
• Package Size: 8.00cm * 4.00cm * 2.00cm
• Package Gross Weight: 0.200kg

Product Description

Cangzhou Hengjin Hardware Manufacture Co., Ltd

At Cangzhou Hengjin Hardware Manufacturing CO., Ltd., we took pride in our work. we were committed to creating metal stamping parts, deep drawn parts, machine parts and assembly parts that were not only functional but also aesthetically pleasing. we understood that our products were a reflection of our customers' brand, and we wanted to make sure that we were represented in the best possible light.

Product Description

#### III. Type of screw

1. Classified by use
- ** Wood screw ** : It is used for joining wood. The thread is relatively deep, and the head is usually flat or round.
- ** Machine screw ** : It is used for connecting metal parts. The thread is relatively fine, and the head is usually hexagonal or round.
- ** Self-tapping screw ** : It is used for connecting thin metal plates or plastic parts. The thread is sharp and can self-tap into the material.
- ** Expansion screw ** : It is used to fix on concrete or masonry structures and generates fastening force through expansion tubes.
- ** Anchor bolts ** : They are used to fix large equipment or structures and are usually embedded in the ground or concrete.
2. ** Classified by shape **
- ** Hexagonal head screw ** : The head is hexagonal, which is convenient for tightening with a wrench.
- ** Round-head screw ** : The head is round and the appearance is relatively beautiful.
- ** flat-head screw ** : The head is flat and is suitable for occasions where a tight fit is required.
- ** Countersunk screw ** : The head is conical. After installation, it is flush with the surface and is suitable for occasions where a flat surface is required.
3. ** Classified by materials **
- ** Carbon steel screws ** : Low cost, high strength, but poor corrosion resistance, usually requiring galvanization treatment.
- ** Stainless Steel screws ** : Strong corrosion resistance, suitable for damp or corrosive environments.
- ** Aluminum alloy screws ** : Light in weight, moderate in strength, suitable for aerospace and automotive fields.
- ** Copper screws ** : Good electrical conductivity, suitable for electrical equipment.
- ** Plastic screws ** : Light in weight and low in cost, suitable for connecting lightweight materials.

Screw

Nut

Bolt

Screw is a fastener with external threads, usually used to join two or more components together. The head shapes of screws are diverse, including flat heads, round heads, countersunk heads, etc., which are used to meet different installation requirements.

Nut is a fastener with internal threads, usually used in conjunction with screws or bolts for fastening connections. The shape of a nut is usually hexagonal or other polygons, which is convenient for tightening or loosening with a wrench.

Bolt is a fastener with external threads, usually used to achieve a connection through a nut. The head of a bolt is usually hexagonal, which is convenient for tightening with a wrench. Bolts are usually used in connection parts that need to be disassembled frequently.

Introduction to Screws

#### Components
1. ** Screw ** : The main part of the screw, which is used to be inserted into the connected components. The length and diameter of the screw are determined according to the usage requirements.
2. ** Screw head ** : The head of a screw, used to provide the force point for rotation. Common screw head shapes include flat heads, round heads, hexagonal heads, etc.
3. ** Thread ** : The helical line on the screw, which is used to generate friction and provide a fixing effect. The pitch and shape of the thread (such as coarse threads and fine threads) will affect the fastening performance of the screw.

#### Specifications of the screw
1. ** Thread specifications ** : including thread diameter, pitch, thread length, etc. For example, M6×1.0 indicates that the thread diameter is 6mm and the pitch is 1.0mm.
2. ** Head Specifications ** : Including the shape and size of the head. For example, the opposite side size of the head of a hexagonal head screw is usually 1.5 times the diameter of the thread.
3. ** Length Specification ** : The length of the screw. Select the appropriate length based on the usage requirements.

#### SCREW processing technology
1. Cold heading: Through the cold heading process, metal wire is processed into screws and heads, and then thread processing is carried out.
2. ** Thread rolling ** : Thread is machined on the screw through the thread rolling process to enhance the precision and strength of the thread.
3. ** Heat treatment ** : Heat treatment processes such as quenching and tempering are applied to screws to enhance their hardness and toughness.
4. ** Surface treatment ** : Including galvanizing, nickel plating, copper plating, oxidation, etc., to enhance the corrosion resistance and aesthetic appearance of the screws.

#### Maintenance and servicing of screws
1. ** Regular inspection ** : Check the tightness of the screws to ensure they are not loose or damaged.
2. ** Cleaning ** : Regularly clean the surface of the screws to remove dust and dirt.
3. ** Lubrication ** : Add an appropriate amount of lubricating oil to the moving parts to maintain their flexible movement.
4. ** Replace damaged screws ** : If damaged screws are found, they should be replaced in time to ensure the safety and reliability of the connection.

Specification

Metal process	stamping, deep stamping, bending, punching, threading, welding, tapping, riveting, turning, deep drawing.
Material	stainless steel, spring steel, carbon steel, copper, brass, bronze, aluminum, alloy.
Surface finish	polished, galvanized, zinc-plated, nickel-plated, chrome-plated, silver-plated, gold-plated, imitation gold-plated, powder coating, etc.
Plating tech	continuous plating, partial plating, and spot plating, etc.
Tolerance	+/-0.02 to +/-0.05.
Inspection	IQC, IPQC, FQC, QA.
Quality control	ISO9001:2008.

MOQ	100PCS
Packing details	plastic + cartons + wooden cases
Payment term	T/T , Western Union, cash etc
Delivery	By sea, by air,  by land,  by courier
Mould time	5-15days
Product lead time	25-30days
Files for quote	PDF, JPG, CAD, 3D

Packing & Delivery

Packaging materials

Small metal stamping parts are commonly made of plastic bags, plastic boxes, etc.

Medium-sized stamping parts, paper boxes or cartons are commonly used, which can provide certain cushioning protection and are environmentally friendly.

Large or heavy stamping parts, pallet packaging can provide better support and protection, facilitating forklift handling.

In special circumstances, metal packaging is used, such as when higher protective strength is required or when moisture-proof and rust-proof requirements are needed.

 

Packaging technology

Bulk packaging: The stamped parts are directly placed into the packaging container, which is suitable for products with regular shapes and not easy to be damaged.

Pallet packaging: Place the stamped parts on pallets and then seal them with plastic film or cartons for easy stacking and transportation.

Tape and reel packaging: For some small stamping parts, such as electronic components, tape or reels are used for packaging to facilitate automated assembly.

Cushioning protection: Add cushioning materials such as foam and sponge inside the package to prevent the stamped parts from being damaged due to collision during transportation.

Packaging & Shipping

Company Profile

OEM one-stop services

We are a professional production factory specialized in sheet metal fabrication mainly stamping, deep drawing, welding and wire bending.

We have our own equipments for a whole production flow, from mould design, prototypes develop, processing, assembly to surface coating.

We have a high level team of engineers to provide you with the most practical and cost-effective solutions. Our workers are experienced and our quality control is strict. 

We have the ability to provide clients with high quality and low price products. Aligning ourselves with purchasers in the same vision of providing superior quality, has contributed to our success. Also honesty is our best policy. 

Our philosophy is simple: we deliver our promises.

If you are looking for a manufacturer to fill all of your custom sheet metal parts for your production or business, then you come to the right place. 

Hengjin Hardware provides free technical assistance for your projects. 

When you contact us, you're assured of an experience that exceeds your expectations, you'll enjoy place of mind knowing that you found dedicate professionals.

Our Advantages :

1. Over 15 years professional technology in metal stamping/punching moulds/molds/tools/dies making, metal parts' making;

2. 10 years experience in developing and export in foreign trade;

3. Certificate: ISO9001:2008 etc;

4. All materials meet ROSH, certificates for materials are available;

5. Capacity can be 2000-800K PCS each day;

6. Customize: OEM or ODM according to buyers' requirement;

7. Various high-quality import equipment and machine center;

8. IQC/PQC/FQC to control the quality all the way;

9. Ensure no defective products to send out;

10. Small orders are accepted;

FAQ

Q: How soon can I get reply after send inquiry?
A:All inquiries will be replied within two hours except sleeping time in China.    
 
Q: How soon can I get samples ?
A: The drawing determines the length of time,Generally samples can be sent out within 10 working days after product drawing confirmed by both side.  
 
Q: What file format can you accept for my products?
A: 1.We can accept varies format, step, stp, jpg,pdf, dwg, dxf,3d and so on.    
     2.If you do not have a prepared CAD file, we can accept a scan of a hand drawn design.  
 
Q: If I don't have drawing, how can I get sample ?
A: If you don't have any drawing,you can send us your sample, we will scan it and make 2D and 3D drawing first, then make sample for you.
 
Q: What are many common materials that you use in projects?  
A: Aluminum,Stainless Steel, Carbon Steel, Copper, Plastics and so on.
 
Q: What's your MOQ(minimum order quantity)
A: Our MOQ is 100 pcs, you are welcome to send us trial order to test our quality and service.
 
Q: What's the payment term do you accept?
A: EXW/FOB Tianjin, paid by T/T, Western Union.