Description
Product Overview
The HARFINGTON Push Fit Ball Nose Spring Plunger is a precision-engineered component designed to meet the demanding requirements of modern industrial equipment. Constructed from high-grade carbon steel, the plunger features a blackened surface treatment that provides superior corrosion resistance and long-term durability. The plunger incorporates a M20x1.5 thread with a total thread length of 33 mm (1.30 inches) and a pin diameter of 10 mm (0.39 inches), delivering a compact yet robust profile that is easy to carry and install.
Key specifications include a package dimension of 3.58 x 3.07 x 1.3 inches and a lightweight mass of 5.29 ounces, making it ideal for applications where space and weight are critical considerations. The design incorporates a thin thread that enables fine-tuning of the installation position, allowing engineers to achieve optimal working alignment and precise indexing. The return knob plunger mechanism provides a smooth, retractable action without locking, ensuring rapid adjustments and reliable performance in high‑speed environments.
![[Product front view showing all components]](https://www.barwareco.store/wp-content/uploads/2026/08/785009df42cb4d348f932e997798290a.jpg)
Usage
This spring plunger is an indispensable accessory across a broad spectrum of industrial sectors. It excels in machinery that requires precise positioning, such as CNC machines, robotic arms, and automated assembly lines. The plunger’s push‑fit ball nose design enables quick insertion and removal of pins, facilitating fast setup changes and minimizing downtime during maintenance or reconfiguration.
Typical use cases include securing telescopic lock pins, aligning workholding devices, and providing indexed stops for moving components. Its robust carbon‑steel construction makes it suitable for harsh environments, including metal‑working shops, automotive manufacturing floors, and heavy‑duty workshop settings where exposure to oils, coolants, and abrasive particles is common.
Engineers, technicians, and machine operators will appreciate the intuitive knob operation that allows the pin to be pulled out or inserted with minimal effort, ensuring that critical components are locked in place quickly and safely.
Why Choose Us
Choosing the HARFINGTON Push Fit Ball Nose Spring Plunger means selecting a product backed by a reputation for quality and reliability. HARFINGTON, a recognized brand in the tools and home improvement market, adheres to stringent manufacturing standards to guarantee consistent performance. Each plunger undergoes rigorous testing for hardness, wear resistance, and dimensional accuracy, ensuring that it meets or exceeds industry specifications.
Our commitment to customer satisfaction extends beyond the product itself. We provide responsive technical support, detailed installation guidance, and a clear warranty policy that protects your investment. When you purchase this plunger, you gain access to a network of knowledgeable professionals ready to assist with any application challenges you may encounter.
Furthermore, the plunger’s design emphasizes ease of use, reducing the learning curve for new operators and enhancing overall productivity on the shop floor. Its compact form factor and lightweight construction also contribute to lower shipping costs and easier inventory management.
Key Features
- High‑strength carbon steel with blackened finish delivers long‑lasting corrosion resistance.
- M20x1.5 thread and 10 mm pin provide precise positioning and secure fit for a variety of machines.
- Thin thread design enables fine‑tuning of installation position for optimal indexing.
- Retractable, non‑locking knob allows quick insertion and removal, minimizing downtime.
- Dedicated after‑sales support and warranty ensure confidence and peace of mind.
FAQ
What materials are used in the plunger?
The plunger is made from carbon steel that has been heat‑treated and blackened to enhance hardness, wear resistance, and protection against rust.
Can this plunger be used with non‑standard pin sizes?
The plunger is designed for a 10 mm pin diameter. While it may accommodate pins of similar size, using the specified pin ensures optimal performance and safety.
How do I adjust the plunger for precise indexing?
Rotate the plunger using the thin M20x1.5 thread until the desired position is reached. The fine thread pitch allows incremental adjustments for exact alignment.
Is the plunger suitable for high‑temperature environments?
Carbon steel maintains its mechanical properties at elevated temperatures typical of most industrial processes, making the plunger suitable for such conditions.
What warranty does HARFINGTON provide?
HARFINGTON offers a standard one‑year warranty covering manufacturing defects, backed by responsive technical support to address any issues that arise.




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