Description
Product Overview
The HARFINGTON Ball Point Spring Plunger is a compact yet robust component designed for precise positioning and reliable locking in a wide range of mechanical applications. Each plunger measures 10mm in body diameter with a tolerance of ±0.05mm and a body length of 13mm, resulting in an overall length of 16mm and an overall diameter of 11mm. Constructed from high‑grade 304 stainless steel, the plunger offers exceptional corrosion resistance, heat resistance, and strength, ensuring long‑term durability even in demanding environments.
Precision casting and polishing give the plunger a surface roughness of Ra 3.2, which contributes to smooth operation and consistent performance. The elastic force of the spring is calibrated at 40N, providing enough tension to securely hold components in place while allowing easy release when needed. The design incorporates a simple press‑in mechanism, eliminating the need for additional tools or complex assembly steps.
Usage
These spring plungers are ideally suited for a variety of applications, including furniture drawers, cabinet doors, industrial equipment, and automation machinery. Their compact size makes them perfect for tight spaces where traditional fastening methods would be impractical. Whether you are assembling a custom workbench, repairing a kitchen cabinet, or integrating a positioning system into a robotic arm, the HARFINGTON plunger delivers consistent performance.
Installation is straightforward: align the plunger with the designated hole and press it in until it seats firmly. The built‑in ball provides a tactile feedback that confirms proper engagement. Once installed, the plunger can be used for indexing, locking, lifting, or simply maintaining a fixed position under load. Regular inspection is recommended to ensure the plunger remains free of debris and continues to operate within its specified elasticity range.
Because the plunger is made from 304 stainless steel, it can withstand exposure to moisture, chemicals, and temperature fluctuations without rusting or degrading. This makes it an excellent choice for outdoor equipment, marine applications, and environments where corrosion resistance is critical.
Why Choose Us
HARFINGTON is a trusted brand known for delivering high‑quality mechanical components that meet rigorous industry standards. Our spring plungers undergo a multi‑stage quality control process, including material verification, dimensional inspection, and functional testing. Each batch is traceable, ensuring that you receive a product that matches the exact specifications listed.
Beyond the superior material and manufacturing processes, we provide comprehensive customer support. Our technical team is available to answer installation questions, recommend compatible accessories, and assist with any warranty claims. We stand behind our products with a satisfaction guarantee, reflecting our confidence in the durability and performance of every plunger we ship.
Choosing HARFINGTON means investing in a component that not only meets but exceeds expectations for precision, reliability, and longevity. Our commitment to continuous improvement drives us to incorporate feedback from engineers, hobbyists, and manufacturers alike, resulting in a product that consistently delivers value across diverse applications.
Key Features
- High‑grade 304 stainless steel construction resists rust and corrosion for long‑term reliability.
- Precise 10 mm × 13 mm dimensions ensure a perfect fit in standard mechanical housings.
- 40 N spring force provides strong yet easily releasable locking for doors, drawers, and equipment.
- Simple press‑in installation eliminates the need for tools, saving time during assembly.
- Dedicated after‑sales support and warranty give peace of mind for professional and DIY users.
FAQ
What material is the plunger made from?
The plunger is fabricated from 304 stainless steel, which offers excellent corrosion resistance, high tensile strength, and good performance at elevated temperatures.
Can the plunger be used in outdoor or marine environments?
Yes. The 304 stainless steel composition protects the plunger from moisture, saltwater, and other corrosive elements, making it suitable for outdoor and marine applications.
How do I determine the correct size for my project?
Measure the diameter of the hole where the plunger will be installed. The HARFINGTON plunger has a body diameter of 10 mm (±0.05 mm) and a total length of 16 mm, fitting most standard 10 mm openings.
Is the plunger reusable after removal?
Yes. The spring mechanism retains its elasticity after multiple insertions and removals, provided the plunger is not subjected to forces exceeding its 40 N rating.
What should I do if the plunger becomes stuck?
Inspect the housing for debris or damage. Gently tap the surrounding area with a non‑metallic tool to free the plunger, and ensure the spring is not overloaded during re‑installation.
Do you offer bulk pricing for large orders?
Absolutely. Contact our sales team for volume discounts and customized packaging options to meet the needs of manufacturers and distributors.
What is the warranty period for this product?
HARFINGTON provides a one‑year limited warranty covering material defects and workmanship, ensuring you receive a reliable component for your applications.
Can the plunger be painted or coated?
While the stainless steel finish is designed to be functional as‑is, any additional coating should be compatible with metal surfaces and not interfere with the spring action.
How do I maintain optimal performance over time?
Regularly clean the plunger and its housing to remove dust or contaminants. Verify that the spring force remains within the specified range during routine inspections.






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