Description
Product Overview
The E-Z LOK Threaded Insert for Metal is engineered to deliver dependable, self‑locking threads in a variety of soft metal substrates. Constructed from 12L14 carbon steel, each insert offers a balance of hardness and ductility that resists stripping while remaining easy to tap. The internal thread size is 5/8‑18, while the external thread measures 7/8‑9, providing a secure transition between a screw or bolt and the host material. With a length of 0.687 inches and a compact footprint of 4 × 1.8 × 1 inches, the inserts are designed for tight spaces where traditional nuts would be impractical. The product dimensions and lightweight nature (0.64 oz per insert) make them ideal for both high‑volume industrial applications and precision DIY projects. The packaging includes five inserts, ensuring you have enough stock for multiple repairs or installations without the need for frequent re‑ordering.
![[Product front view showing all components]](https://www.painreliefco.store/wp-content/uploads/2026/08/69897274ca35433f9f56036a2fcdc5b1.jpg)
Usage
These inserts excel in environments where soft metals such as aluminum, cast iron, magnesium, and certain alloys are common. They are frequently used in aerospace maintenance, automotive repair, marine equipment, and consumer electronics where a reliable threaded connection is critical. The design allows installation with standard tools: a drill to create the pilot hole, a conventional tap to shape the internal thread, and a screwdriver or a simple drive tool to seat the insert. Because no special equipment is required, technicians can quickly reinforce damaged threads, replace worn fasteners, or create new attachment points on existing components. The self‑locking feature ensures that vibrations and thermal cycling do not loosen the connection, making the inserts suitable for both static and dynamic loads. Whether you are retrofitting a machine, assembling a prototype, or performing routine maintenance, the E-Z LOK inserts provide a versatile solution that adapts to a wide range of use cases.
Why Choose Us
E‑Z LOK has a long‑standing reputation for producing high‑quality fastening solutions, and this threaded insert is no exception. The 12L14 carbon steel is heat‑treated to meet stringent industry standards, delivering consistent thread integrity and resistance to wear. Each batch undergoes rigorous dimensional inspection to guarantee that the internal and external threads conform to the specified 5/8‑18 and 7/8‑9 standards, reducing the risk of cross‑threading or stripping during installation. The company also provides comprehensive technical support, offering guidance on proper drilling depths, tap selection, and torque specifications to maximize performance. In addition, the product carries an Amazon Best Sellers Rank of #23 in Thread Locking Inserts, reflecting strong customer satisfaction and a 5‑star rating from verified buyers. With a focus on durability, ease of use, and after‑sales service, E‑Z LOK ensures that you receive a reliable component backed by a brand you can trust.
Key Features
- Self‑locking design eliminates loosening under vibration and thermal changes.
- Made from 12L14 carbon steel for superior strength and wear resistance.
- Standard 5/8‑18 internal and 7/8‑9 external threads fit common fasteners.
- Easy installation with ordinary drills, taps, and a screwdriver—no special tools required.
- Pack of five 0.687‑inch inserts provides cost‑effective coverage for multiple repairs.
FAQ
Can these inserts be used in hardened steel?
No. The inserts are optimized for soft metals such as aluminum, cast iron, and magnesium. Using them in hardened steel may cause insufficient thread engagement and could damage the insert.
What tap size should I use for the internal thread?
Use a standard 5/8‑18 tap to prepare the pilot hole. The tap creates the proper thread profile for the insert’s internal dimensions, ensuring a secure fit.
Do I need a special driver to install the insert?
Installation can be performed with a regular screwdriver, a bolt or jam nut, or an E‑Z LOK drive tool. The design is compatible with common hand tools, making field installation straightforward.
How many inserts come in one package?
Each package contains five inserts, each measuring 0.687 inches in length, providing enough material for multiple applications or repeat repairs.
Is there a warranty or guarantee?
E‑Z LOK offers a limited warranty that covers material defects and manufacturing errors. For any issues, contact the seller’s customer support for replacement or assistance.




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