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The dimensional system is exactly the same as that of ordinary wire thread inserts and complies with international standards:
◎ Nominal Size: refers to the standard internal thread size that can be formed after the thread insert is installed. Common metric specifications include M3, M4, M5, M6, M8, M10 etc; imperial specifications include #4-40, #8-32, #10-32, 1/4-28, 5/16-24, etc.
◎ Length: Expressed as a multiple of the thread diameter (D). Common lengths include 1D, 1.5D, 2D, 2.5D, and 3D. The locking ring is typically located in the center of the insert.
◎ Wire diameter and pitch: These are consistent with free-thread inserts, ensuring compatibility with standard taps and installation tools.
Wire Thread Insert
0102030405
Self-locking wire threaded inserts
Cr-Ni stainless steel
The absolute mainstream and preferred material.
1Cr18Ni9 (304 / A2)
The most commonly used, offering excellent corrosion resistance, strength, and elasticity, suitable for most working conditions.
00Cr17Ni14Mo2 (316 / A4)
Molybdenum alloyed, with higher resistance to chemical corrosion and pitting, suitable for harsher environments such as marine and chemical industries.
High-temperature alloys
such as Inconel X 750, used in extreme high-temperature environments (such as aircraft engines), but usually not provided as standard sets.
Locking wire thread inserts combine all the advantages of standard wire thread inserts with key anti-loosening features:
Excellent anti-loosening and anti-vibration performance: This core advantage. It achieves extremely high anti-loosening effectiveness through its inherent structure, without relying on spring washers, locking washers, or thread sealants, far exceeding the reliability of traditional methods.
Reusability: The locking function is based on elastic deformation rather than destructive gluing, allowing bolts to be disassembled and assembled repeatedly without significantly reducing their locking capacity.
Inherits all the advantages of wire thread inserts:
Increased thread strength: Produces strong, wear-resistant threads in soft materials (aluminum, magnesium alloys, and plastics).
Extends base insert life: Protects base threads from wear and corrosion, allowing screws to be repeatedly installed and disassembled.
Corrosion and high-temperature resistant: Stainless steel withstands harsh environments.
Perfect thread repair: Repairs damaged threaded holes to their original dimensions, even stronger.
Compatible with standard tools: Uses the same installation tools (taps, installation wrenches, and removal tools) as free-type wire thread inserts for installation and removal, eliminating the need for additional investment.
Locked wire thread inserts are designed for applications subject to severe vibration, shock, and alternating loads, and are widely used in:
01
Aerospace
Aircraft engines, landing gear, flight control systems, and fuselage structures—areas with the highest requirements for anti-loosening.
01
Automotive and racing
Engine blocks, transmissions, braking systems, and chassis suspension—resisting road and engine vibration.
01
Military and equipment
Tanks, armored vehicles, artillery, and radar equipment—ensuring connections do not fail under extreme shock.
01
High-end Machinery and Robotics
CNC machine tool spindles, industrial robot joints, and precision instruments—guaranteed long-term accuracy and reliability.
01
Energy and Heavy Equipment
Oil drilling platforms, wind turbines, and heavy-duty diesel engines—resisting continuous heavy loads and vibration.
The installation process for locking wire thread inserts is identical to that of standard wire thread inserts, which is one of their significant advantages.
Drilling:
Using the specified drill bit included in the set, drill a pre-fabricated hole in the base.
Tapping:
Use the dedicated wire thread insert tap (ST tap) included in the set to tap the pre-fabricated hole.
Inserting the Insert:
Attach the insert, with the insert's mounting handle facing outward, to the guide rod of the installation wrench.
Align the leading end of the insert with the tapped hole and turn the wrench clockwise to easily thread the insert into the hole until its top is slightly below the work piece surface.
Breaking the Tang:
This is a critical step. Use a dedicated punching tool (or "tang remover") to insert into the insert hole. Align the tool with the groove at the base of the tang and strike it vertically downward with a small hammer to break the tang off the insert and remove it.
Warning: Never attempt to install the bolt without first breaking the tang! This will damage both the insert and the bolt.
Inserting the Bolt:
At this point, you can insert the bolt. You will feel a noticeable increase in torque as the bolt passes through the locking ring; this is normal.
Make an free consultant
Welcome to discuss more details and usage of the product with us at any time. We look forward to your contact!