Screw Manufacturer


Screw Manufacturer & Custom Screw

Dongguan KENENG International Trading Co., Ltd is a professional screws manufacturer and trading integrating company, specializing in the design, production, and sales of various carbon steel, stainless steel, copper parts, titanium alloy products such as British and American standard Cup heads, hexagon bolts, self-tapping screws, drilling screws, drywall screws, stud bolts, U-bolts, anchor bolts, welding screws, eye bolts, SEM screws, set screws, carriage screws, nuts, gaskets, electronic small screws, pin shafts, springs, car parts, high-grade building expansion bolts, etc.

As a custom screw manufacturer, KENENG has ISO9001 and Dun & Bradstreet certifications and has its own patents and trademarks, we also plan to achieve IATF 16949 certification this year.

Are You an OEM Manufacturer?


Screws Display

Custom Screw

We have a professional R&D team and can produce various non-standard screws according to customer requirements. Custom fasteners are required when engineering specifications require fasteners to function in applications that are not industry standard. KENENG is a custom screw manufacturer. The purpose of custom screws is:

  1. Customized screws are available for special lengths, and tolerances regarding length or body diameters.
  2. Due to some special strength requirements or corrosion conditions, these special conditions may require special materials.

1. KENENG can customize non-standard screws of different materials. Including stainless steel, carbon steel, aluminum, copper, alloy steel, titanium alloy, etc.

2. KENENG can customize non-standard screws with different strength levels. Including 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, etc.

3. KENENG can customize non-standard screws with different surface treatments. Including white zinc, black zinc, yellow zinc, green zinc, color zinc, silver, gold, chromium, nickel, tin, copper, etc.

4. KENENG can customize non-standard screws with different head and groove types. The head shape includes cross, hexagon, rice character, plum blossom, H shape, triangle, square hole, Y shape, etc.

Grooves include pan head screws, round head screws, mushroom or truss head screws, countersunk head screws, flat head screws, oval or raised head screws, bugle head screws, cheese head screws, fillister head screws, flange head screws, hexagon socket head screws, square head screw, etc.

According to customer requirements, we can customize various specifications of non-standard screws, combination screws, electronic screws, special-shaped screws and precision screws required by customers according to the drawings.

The screws we produce have undergone quality inspection from the selection of raw materials to the delivery of products. Our non-standard screws, special screws, special-shaped screws, etc. are deeply favored, trusted and praised by new and old customers, and our sales network covers the whole world.

If you have any needs, please contact KENENG, we will provide you with the best quality service.

Customized Screws Case

Screws are ubiquitous in industrial production and daily life. Therefore, screws are also known as the rice of industry. The application scope of screws includes electronic products, mechanical products, digital products, power equipment, and electromechanical mechanical products. Screws are also widely used in vehicles, ships, chemical experiments, hydraulic engineering, and so on. And It is also widely used in machinery, mold, automobile, motorcycle, aerospace, agricultural machinery, electronics, construction, household appliance, and other fields.

We have a large number of quantities of standard Metric and Inch screws in stock. For a long time, we have been serving new and old customers with the concept of honesty, pragmatism, innovation, and win-win, and have a good reputation in the hardware industry.

Here are some products about KENENG custom screws. Including different parameters, different materials, etc., and the number of products has been increasing.

Types of Custom Screw


The standard screw in the market mainly includes carbon steel, stainless steel, and copper. We distinguish low carbon steel, medium carbon steel, high carbon steel, and alloy steel by the carbon content in carbon steel.

  • Carbon steel (10B21,10B33, Q235, ML10, 35#, 45#)
  • Stainless steel (SUS201, 301, 304, 316, 316L, 310, 410, 420, A2, A4, duplex stainless steel)
  • Alloy (B7, B7M, 35CrMo, 40CrMo, 42CrMo, ML20MnTiB, etc.)
  • Copper/Brass (H62, H65, H68, etc.)
  • Titanium/Ti alloy
  • Aluminum/Al alloy
  • Monel
  • Inconel
  • Hastelloy
  • * Material grade: 4.8, 6.8, 8.8, 9.8, 10.9, 12.9.


  • Diameter: M1-M100
  • Length: 2mm-3000mm


  • GB
  • Q(Automobile Standard)
  • DIN
  • ASME
  • ASTM
  • ANSI
  • BS
  • EN
  • ISO
  • JIS
  • Customized screws


  • Salt spray test at least 24 hours (except black).
  • Plating (Electro galvanizing, Hot dip galvanized, Nickle, Zn-Ni, Chrome, Copper, Gold, Silver)
  • Black oxide
  • Xylan
  • Dacromet
  • Geomet
  • Nyloc
  • Phosphating
  • Polish

Head type

  • Hexagon head
  • Hexagon head with flange
  • Square head
  • T head
  • Pan head
  • Truss head
  • Flat head
  • Countersunk head
  • Cheese head
  • Oval head
  • Pan washer
  • Round head, etc.

Drive type

  • Phillip/Cross
  • Slot
  • Phillip/slot
  • Inner hexagon
  • Pozi
  • Torx/Six lobe
  • Square, etc.

Point type

  • * Points of self tapping screws as shown in the figure.
Type of screw

Materials We Can Custom Screws

KENENG can customize the materials of fasteners including: carbon steel, stainless steel, brass, copper, steel, Ti alloy, Al alloy, etc.

The Order Process of Custom Screws

OEM: Receive pictures or samples

  • Design & drawing process
  • Make sample, approval by customer
  • Confirmation on order detail
  • Signing Pi
  • Receive deposit
  • Mass production
  • Receive Balance
  • Delivery

ODM Customer has no design:

  • Design & drawing process
  • Quotation
  • Payment of design fee
  • Make CAD or 3D design
  • Make sample, approval by customer
  • Confirmation on order detail
  • Signing Pi
  • Receive deposit
  • Mass production
  • Receive Balance
  • Delivery

ODM Customer has design:

  • Receive design
  • Quotation
  • Payment of design fee
  • Make CAD or 3D design
  • Make sample, approval by customer
  • Confirmation on order detail
  • Signing Pi
  • Receive deposit
  • Mass production
  • Receive Balance
  • Delivery

Lathe parts(non-standard parts)

  • Receive CAD or 3D design
  • Quotation
  • Signing Pi
  • Receive deposit
  • Make sample, approval by customer
  • Mass production
  • Receive Balance
  • Delivery

Stamp part

  • Receive CAD or 3D design
  • Quotation
  • Signing Pi
  • Receive deposit
  • Make prototype
  • Open molding
  • Trial production
  • Mass production
  • Receive Balance
  • Delivery

Injection Molding

  • Receive CAD or 3D design
  • Quotation
  • Signing Pi
  • Receive deposit
  • Make 3D or Prototype sample
  • Analyse Molding
  • Design
  • Open Molding
  • Make sample, approval by customer
  • Mass production
  • Receive Balance
  • Delivery

Related Fasteners Products

Screw Manufacturer

As a processional screw manufacturer in China. KENENG can manufacture standard and non-standard screws. We are able to produce electronic precision screws, extra-long screws, step screws, shoulder screws, color screws, self-drilling screws, wood screws, machine screws, drywall screws, brass screws, and self-tapping screws, as well as other kinds of special-shaped screws. The products are widely used in high-end furniture, kitchenware, medical beds, sports equipment, household appliances, etc., and can provide salt spray, film thickness, and various test reports.

KENENG has more than 500 sets of production and testing equipment imported from Japan, Switzerland, the United States and Taiwan, including cold forming, CNC, stamping, hot forging, turning, cold drawing, heat treatment, and electroplating lines. KENENG attaches great importance to product research and development and insists on technological innovation. The production process includes cold heading head, groove rubbing, clamping, tooth rubbing, die casting, injection molding, groove milling, etc.

Our advantage:

  • short development cycle.
  • Competitive price.
  • Mass production capacity (20k-200k pieces/order), monthly production capacity exceeds 10 million pieces.
  • Abundant raw materials.
  • Guarantee product quality and delivery time.

KENENG factory

What Processes Can Use to Produce Screws?

We can use CNC machining, injection molding to manufacture screws.

Injection Molding part

Injection Molding

Injection molding is a manufacturing process that produces parts through injection molding machines and molds. Injection molding uses plastic molding molds to make thermoplastics or thermosets into plastic products of…
Read More Injection Molding

Inspection Equipment and Screw Production Process:

Inspection equipment are calipers, salt spray test, 2D projector, microscope, vickers hardness meter, projector, etc

Inspection equipment:
Screw production process

Application Industries of Screws

News of Screw

FAQ of Screw

The screw slide means that there is no way to remove the screw through the screwdriver, mainly because the screw teeth are worn and cannot be engaged with the screwdriver.

The reason why the screw slips are that the screw teeth may be worn too much due to too much force during screw tightening. Another reason may be that the quality of the screw is too poor. If you want to remove the screw of the sliding wire, you can use pointed nose pliers to clamp the screw, and then turn the screw of the sliding wire in the opposite direction with skillful force. After about three or four turns, the screw will become loose.

1. Hot dip galvanizing is an effective way of metal corrosion prevention, which is mainly used in metal structures and facilities in various industries. It is to immerse the de-rusted steel parts into the molten zinc at about 500℃, so that the zinc layer is attached to the surface of the steel members, so as to achieve the purpose of corrosion prevention. Cold galvanizing, generally speaking, requires no heating, and the amount of galvanizing is very small. Such galvanized parts are easy to fall off in wet environments.

2. Difference between hot galvanizing and cold galvanizing:

Hot dip galvanizing is also called hot dip galvanizing. It melts the zinc ingot at high temperature, puts some auxiliary materials, and then immerses the metal structure into the galvanizing tank to make a layer of zinc layer attached to the metal components. The advantages of hot-dip galvanizing are its strong anti-corrosion ability, good adhesion and hardness of zinc coating.

“Cold plating” means “electroplating”, that is, the zinc salt solution is electrolyzed to coat the plated parts. Generally speaking, there is no heating, and the amount of zinc is very small. It is easy to fall off in a wet environment.

Hot dip galvanizing is a chemical treatment and belongs to an electrochemical reaction.

Cold galvanizing is a physical treatment, only a layer of zinc is brushed on the surface, so the zinc layer is easy to fall off. Hot galvanizing is often used in building construction.

Continuous hot galvanizing process: steel → heating → cooling to galvanizing temperature → galvanizing → cooling.

Cold galvanizing is electro galvanizing, which is only 10-50g/m2, and its corrosion resistance is much different from that of hot-dip galvanizing. The price of electro galvanizing is relatively cheaper.

Hot dip galvanizing refers to galvanizing the surface of the steel body under the condition of hot dip. It has strong adhesion and is not easy to fall off. Although the hot dip galvanizing pipe is rusted, it can meet the technical and health requirements for a long period.

3. Process difference

First of all, the process difference is: hot galvanizing is to dip the workpiece into the molten zinc solution for a certain time after degreasing, pickling, dipping and drying, and then putting it out.

If you want to measure the diameter of a screw or bolt. Please measure the distance from the male thread on one side to the male thread on the other side, this is called the major diameter. You can also measure the bottom cavity of the thread from side to side, which is a small diameter.

1. Most screws are flat at the bottom of the head (flat head, round head, truss head, etc.). All these screws are measured from the bottom of the head to the tip.

measure screws and bolts

2. Flat head, countersunk head screws are flat on the top of the head. They are measured from the top of the head to the tip.

measure screws and bolts

3. The screws and bolts with the hexagon head and Hexagon washer head are even at the top and bottom, but measured from the bottom of the head.

measure screws and bolts

4. Oval head screws are an exception to this rule. The starting point of their length is the head?? The widest part of the. From this point to the tip is the length of the screw.

measure screws and bolts

5. The drilling screw measures from the end of the drill point.

measure screws and bolts