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Chicago screws Manufacturers

In fact, the Chicago screw is also called a male and female screw, a lock screw, but also a kind of combination screws; the screw is called the male screw, and the post is called the female screw. Generally, the Chicago screw is to play a tight role, and will be used in bags, leather goods, clothing, and so on.
The other name of the Chicago screw
1. Because the product is like the Chinese word "gong", it is also known as H-screw.
2. Because it is an indispensable part of the popular car key bag, also called the car key bag screw.
3 is also used for accounting books, also known as book screws.
4. Used for an album, also called an album screw.  
Summed up, the male and female screw production name is: Chicago screw, male and female screw, H-screw, car key package screw, book screw, album screw, and so on.
The material classification
No,w more popular is mainly made with copper and brass, followed by iron and stainless steel, because stainless steel is not easy to process, generally do not use this material, in addition, iron is not high-grade enough to choose this material as far as possible, copper and brass are more common, most of the market is also some kinds of material.  
Plating color  
There are mainly natural, gold, silver, black, metal guns, antique brass, etc. There are generally two types of plating: Rolling plating and Hang plating. In addition, the rolling plating effect is not good; generally used for low-grade products, so the most common way is to hang plating.
Suzhou Anzhikou Hardware Technology Co., Ltd. is a screw manufacturer with 20 years of experience. We can customize productions, according to your drawings and samples, can also provide you with suitable fastener solutions.  If necessary, you are welcome to inquire!
Focused on precision screw manufacturing and customized fastener solutions.

Suzhou Anzhikou Hardware Technology Co., Ltd. is a manufacturer integrating the development, production, and sales of precision screws. Chicago screws Manufacturers and Chicago screws Factory in China. The company's existing factory covers an area of 2000 square meters and has successively introduced more than 200 sets of precision equipment from Taiwan and Japan, including a complete set of fastener production equipment such as cold heading, thread rolling wire, CNC and anti-loosing, etc., which can produce miniature screws with an external diameter of 0.6mm/length of 0.6 mm, and the annual production capacity of standard parts and non-standard screws is up to 2,000 square meters.
Anzhikou hardware has a complete range of testing equipment and has passed the ISO9001:2015 quality system certification, with 20 years of industrial production and development experience, industry experience of 20 years of engineering and technical staff of 10, according to customer needs to customize a variety of non-standard screws, Wholesale Chicago screws, to meet different customer quality and quantity requirements. Suzhou Anzhikou precision screws with excellent product quality, best-selling export 40 countries and area worldwide.

Suzhou Anzhikou Hardware Technology Co., Ltd.
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Industry knowledge

Matching Post Length to Material Thickness

Chicago screws are often used to clamp layered materials such as leather, fabric, paper, plastic sheets, and thin accessories. For buyers, the most important sizing factor is not only thread diameter, but also the relationship between post length and total material thickness after compression.

If the female post is too short, the male screw may not engage enough threads. If the post is too long, the assembly may feel loose even after tightening. The ideal post length should match the compressed thickness of the finished product, not only the loose material thickness before assembly.

Practical details to confirm before ordering

  • Total thickness of leather, fabric, paper, plastic, or other layered material after pressing.
  • Hole diameter and whether the hole is punched, drilled, molded, or laser cut.
  • Required head diameter for clamping area, appearance, and pull-through resistance.
  • Thread engagement length between the male screw and female post.
  • Whether the product needs repeated opening, adjustment, or permanent fastening.

At Anzhikou, we usually recommend checking the screw sample with the real material stack before confirming mass production, especially for bags, leather goods, car key bags, books, and albums.

Head Style, Slot Design, and Appearance Consistency

Because Chicago screws are often exposed on finished products, the head style affects both function and appearance. A wider head can improve clamping support, while a smaller head may look cleaner on delicate accessories. Buyers should also confirm whether the head needs a flat slot, cross recess, hex socket, decorative surface, or smooth no-slot appearance.

Common design choices for Chicago screw appearance and assembly performance
Design Choice Main Benefit Buyer Attention Point
Large flat head Better clamping area and pull-through resistance May look too prominent on small accessories
Small decorative head Cleaner appearance for leather goods and albums Clamping area and material strength should be checked
Slotted drive Simple installation and common tool compatibility Slot edge quality affects visible appearance
Smooth head More refined visible surface Assembly method must be planned carefully

With our precision processing experience, Anzhikou can help buyers balance head appearance, drive structure, and fastening reliability for customized male and female screw designs.

Material and Finish Selection for Leather Goods, Books, and Accessories

Chicago screws used in bags, leather goods, clothing, accounting books, albums, and car key bags usually need both mechanical holding force and stable appearance. Material and surface finish should be selected according to contact material, wear conditions, color matching, and corrosion resistance.

For leather goods and accessories, surface treatment is often part of the product design. Nickel, black, brass tone, antique finish, stainless steel color, and customized plating can create different visual effects. Finish consistency is especially important when many screws are visible on the same product.

Selection points for better long-term use

  1. Choose suitable material strength according to tightening force and product thickness.
  2. Confirm whether the finish needs to match zippers, buckles, rivets, hinges, or other hardware.
  3. Check whether the coating can resist hand sweat, moisture, friction, and daily handling.
  4. Define acceptable color difference, scratches, stains, burrs, and plating marks.
  5. Consider anti-loosening measures if the product will be opened, folded, or moved frequently.

Anzhikou has complete testing equipment and ISO9001:2015 quality system certification, so we can support buyers in setting practical inspection standards for both visible appearance and assembly performance.

Customization and Inspection Points for Male and Female Screw Sets

A Chicago screw set includes a male screw and a female post, so the inspection focus should cover both parts and their combined fit. Even if each single part appears correct, the set may fail if the internal thread is too shallow, the post length is unsuitable, the head surface is damaged, or the two parts do not tighten smoothly.

For customized orders, buyers should define the complete assembly requirement rather than only one screw dimension. The fit between the male screw and female post determines tightening feel, holding force, and final product stability.

Recommended inspection items

  • Male screw thread size, length, head diameter, head height, and drive depth.
  • Female post outer diameter, post length, inner thread depth, and head dimensions.
  • Assembly smoothness, tightening torque, thread engagement, and final clamping condition.
  • Surface finish, plating color, burr control, scratch level, and packaging protection.
  • Application testing on real bags, leather parts, albums, books, or accessories before bulk production.

With 20 years of non-standard screw customization experience and more than 200 sets of precision equipment, Anzhikou can support customized Chicago screw production for different sizes, finishes, and application requirements.