20mm Brush Nickle snap hook

This is a hook and loop designed for hiking bags, similar to the ESPRIT snap hook. The tail features a trapezoidal tail loop with an inner size of 20mm. It can be used with a 20mm shoulder strap or belt. The overall style features sharp edges, highlighting a thick and cold style. Hook body height 53mm, overall height 65mm.weight :26.22gram Suitable for larger outdoor bags.colour is Brush Nickle colour

Item Detail

Material:	Zinc Alloy
item code and Size:	OYC-0515# 65*20mm ring 20mm
Surface treatment：	Polished+Brush+Electroplating
Colour:	N/F Brush Nickle with Lacquer
Load bearing/tensile value:	45KG
Applicable fields:	Leather bag,backpacks, suitcases, pet supplies, outdoor equipment, military products, etc.

can we custom our brand on the snap hook?

We can customize the required logo on this hook and loop, and usually we will engrave the logo in this position

Logo on Snap Hook side	Logo on Snap Hook top	Logo on Snap Hook bottom

How to choose the appropriate hook and loop for a handbag

Shape and contour: The shape of the hook and loop (round, square, oval, irregular) should correspond to the overall contour of the bag.
Size ratio: The size of the hook and loop must be proportional to the body of the bag. A large bag with a small buckle may appear stingy, while a small bag with a large buckle may appear bulky.
Color and style: The color of the hook and loop should be consistent with the hardware (such as chains, rivets). Gold exudes luxury, silver exudes modernity, and black exudes coolness.
Brand identity: Many luxury brands cleverly incorporate their logos into hook and loop designs, which themselves are a form of decoration.

Snap Hook Material:

Material	Feature
Zinc Alloy	The most commonly used, cost-effective, and can be presented in various colors (gold, silver, bronze, etc.) through electroplating, but the underlying layer may be exposed after the electroplating layer wears out.
Brass	High quality texture, heavy weight, good durability, and a unique retro feel (copper green) that will oxidize over time
Stainless steel	sturdy and corrosion-resistant, commonly used for outdoor or functional bags, but with limited color options (mostly silver).
Aluminum	lightweight, often treated with anodizing, bright colors, but relatively low hardness

In addition to material selection, surface treatment processes can also highlight the characteristics and texture of the hook and loop.
Different surface treatment processes and colors can be selected according to the different styles of handbagsThe surface treatment process of Snap hook can be divided into the following points.

A brief summary is as follows

Surface treatment process	Feature
Polishing/Mirror	Shining and dazzling, appearing luxurious
Matte/brushed	High quality texture, scratch resistant, no fingerprints visible
Vintage/antique style	with a retro and handmade feel.
Enamel/baking paint	can be filled with colors or logos, making it more delicate

PS:to checked a good quality snap hook can use below method Weigh (heavier ones are usually better), check if the edges are smooth and free of burrs, test if the opening and closing are smooth, and if the plating layer is uniform.

If products are manufactured using molds, there will be a molding line. So when processing the blank, it is also necessary to remove the inner mold line. This inner mold relay line can only be manually removed using manual tools due to its concealment. However, removing the inner mold line will make the product more aesthetically pleasing and smoother after electroplating. Since this is manually removed, it will increase a lot of costs. But for high-quality products, the inner mold line must be removed

This snap hook features an exposed spring design. The appearance of the product is designed to integrate with the function of the spring. This way, the spring can serve as both a closed lock and an elastic force for the spring.

The opening and closing force of a snap hook is determined by the thickness and angle of the spring. So when choosing a spring, it is also necessary to consider the required elasticity for opening and closing during use, and choose springs of different thicknesses and angles

The following image shows the spring of the snap hook

One of the important factors considered in spring design for snaphook

you have to understand what size of thickness do you want to insert the snap hook, and it need to joint and take off easily.

this you need to think when the spring open, the Maximum size.In general, the maximum size should be 1mm larger than the thickness of the inserted item .For example:if the ring thickess is 4mm, then the mouth space need at least 5mm or more.

Ps:Ring thicknees need to use it’s max thickness to test, not the minimum size.

What conditions do springs need to have for snap hook？

High elasticity:	able to withstand repeated compression and rebound without permanent deformation.
High fatigue strength	It can maintain its elasticity even after countless opening and closing cycles.
Corrosion resistance	Especially for handbags, they often come into contact with sweat, moisture, and even rainwater.
Appropriate hardness and toughness	It is necessary to ensure support while not being too brittle.
Workability	Easy to produce various fine shapes.

With the above characteristics, it can be used for snap hook spring

Comparison of main materials for spring(use on snap hook)

1. stainless steel

304 stainless steel
Advantages:	Excellent corrosion resistance (rust prevention), good elasticity and fatigue strength, relatively moderate cost. Can meet the usage environment of the vast majority of daily handbags.
Disadvantage:	In extremely humid or high salt environments (such as the seaside), rust may still occur over a long period of time.
Applicable scenarios	Handbags commonly used in urban daily life, including luxury handbags, commuting bags, fashion handbags, etc. This is the most cost-effective and versatile choice.

316 stainless steel
Advantages:	Contains molybdenum element, with extremely strong corrosion resistance, especially able to resist the corrosion of chlorides (such as sweat and seawater). Its comprehensive mechanical performance is slightly better than 304
Disadvantage:	The cost is higher than 304.
Applicable scenarios	high-end handbags, outdoor style bags, or bags expected to be used in humid/coastal environments. If you pursue ultimate durability and “rust free” protection, this is the best choice.

420 high carbon stainless steel
Advantages:	high hardness, high wear resistance. After heat treatment, high strength can be obtained.
Disadvantage:	Corrosion resistance is much lower than that of 304 and 316, making them more prone to rusting. Elasticity is not as good as the former.
Applicable scenarios	More commonly used for structural components where the spring itself is not exposed and requires extremely high support strength, which is less common in ordinary hooks and buckles.

2.Carbon Spring Steel – Balancing Performance and Cost

Carbon Spring Steel
Advantages:	It has excellent elasticity and high fatigue strength, making it a traditional material for manufacturing high-performance springs.
Disadvantage:	Highly susceptible to corrosion. As long as it is exposed to air, it will quickly rust, and once rusted, the performance of the spring will rapidly decline until it breaks.
Applicable scenarios	Surface treatment (such as galvanizing, nickel, enamel, etc.) is required before use. Commonly seen in mid to low end products that are cost sensitive and have springs hidden inside handbags. If the electroplating layer is worn or damaged, the internal steel will quickly corrode.

3.Copper Alloy – Selection for Specific Scenarios

phosphor bronze
Advantages:	Good corrosion resistance, good conductivity, good elasticity, and easy processing.
Disadvantage:	Fatigue strength and anti relaxation ability are usually inferior to high-quality stainless steel.
Applicable scenarios	Commonly used for small and precision electronic device hinges or battery contact pieces, less commonly used in handbag hooks and buckles unless there are special conductive or anti magnetic requirements.

beryllium copper
Advantages:	extremely high strength, excellent fatigue and corrosion resistance, non-magnetic
Disadvantage:	The price is very expensive, and beryllium element poses health risks during the processing.
Applicable scenarios	Only used in situations with extreme performance requirements (such as aerospace, high-end industry), extremely rare in the handbag field

4.Nickel titanium alloy – special functional material

bNickel titanium alloy
Advantages:	It has shape memory effect and super elasticity. It can automatically restore its original state after deformation and is very durable.
Disadvantage:	Extremely high cost, difficult processing and manufacturing.
Applicable scenarios	Currently, it is mainly used for high-tech, medical or top-level conceptual products, and has not yet been popularized in handbag hooks and buckles. It is a potential direction for future development.

PS:

• Prioritize stainless steel: For handbags aimed at the mass market, 304 stainless steel is the most balanced choice between performance and cost. Brands positioned as high-end can consider 316 stainless steel as a selling point.
• Pay attention to the shape of the spring and heat treatment: The performance of the material needs to be fully utilized through reasonable design (such as the number of turns and wire diameter of the spring coil) and precise heat treatment processes. A poorly designed 316 stainless steel spring can also fail early.
• Testing is crucial: salt spray testing (to verify corrosion resistance) and fatigue life testing (to simulate opening and closing tens of thousands of times) should be conducted to ensure the long-term reliability of the spring(USE FOR SNAP HOOK)

snap Hook Spring fatigue life TIMES?

Because it is directly related to the quality of the hook and the user experience. There is no globally unified mandatory standard for the fatigue life of hook and loop springs, but they have industry recognized grade requirements based on the positioning, price, and expected usage scenarios of the bag.

Specific lifespan requirements for products of different grades

Basic/Economic Products	Required lifespan: ≥ 5000	This is the entry-level threshold. Assuming that the user opens and closes the bag 10 times a day, that’s 3650 times a year. This lifespan can guarantee 1-2 years of normal use without any problems. For fast fashion or low-cost handbags, this is usually the target value.	Common materials: electroplated carbon spring steel or basic 304 stainless steel.
Standard/mid to high end products (most common)	Required lifespan: 10000 to 25000	This is the standard pursued by most well-known brands and high-quality handbags. Opening and closing 10 times a day can provide stable use for 3-7 years. This lifespan can provide a good user experience and brand reputation.	Common materials: high-quality 304 stainless steel, manufactured through reasonable heat treatment and process
High end/luxury grade products	Required lifespan: ≥ 50000	Luxury brands have extremely strict requirements for their hardware components. Their goal is to ‘pass down’, that is, to ensure that the hook and loop remain intact throughout the entire lifecycle of the bag. 50000 cycles of opening and closing means that even if used 10 times a day, it can last for more than 13 years. Many top brands even require internal control standards to reach 100000 times.	Common materials: High quality 304 or 316 stainless steel, using sophisticated design and top-notch manufacturing processes