English
Brand Name:KernalCoil Thread Insert
Material: Stainless steel 304(Red Coating)
Surface Treatment: Stainless Steel-Passivated
Type: UNC/UNF Inch Series Screw-Lock
Place of Origin: Shenzhen, Guangdong
Reliability Test: Dimensions, hardness test, Salt spray endurance test
OEM/ODM Service: Acceptable
Certification: ISO 9001:2015, IATF 16949:2016, SGS
Application: Aviation, Automotive, Machinery, Motorsport and other industry
Lead Time: Standard Inserts in stock
Packing: Paper packing or Plastic packing+Carton packing+Wooden packing
Price Terms: EXW/FOB/CIF/CFR/FCA/CPT/CIP etc.
Detail
Non-Tail Thread Inserts: High-Strength Fastening Solutions for Soft Materials
Non-tail thread inserts (also called tangless threaded sleeves/coils) are precision-formed from high-strength stainless steel wire into a diamond-shaped cross-section, featuring a spring-like coil design. When installed in threaded holes of low-strength substrates like aluminum, magnesium, cast iron, and plastics, they create durable standardized internal threads that optimize fastener performance.
Key Advantages:
• Reinforces thread strength by 300%+ in soft materials
• Distributes load evenly across threads through elastic connection
• Compensates for pitch/angle deviations between mating threads
• Extends service life with corrosion/heat/wear-resistant properties
• Prevents thread seizure, stripping, and galling
Ideal for aerospace, automotive, and industrial applications requiring reliable threaded connections under extreme conditions. The tang-free design simplifies installation while maintaining ISO/DIN standard thread dimensions.
Tangless Helical Inserts: Efficient Installation and Hex Drill Rod Tool Applications
Threadless helical inserts (tailless threaded inserts) are distinguished by their tang-free design, enabling rapid installation without post-installation tang removal. Two primary insertion tools facilitate their deployment: hex drill rod tools and bent-tip installation tools. This guide focuses on the operational advantages of hex drill rod insertion systems.
Key Features:
Tang-Free Efficiency - Eliminates secondary breaking operations
Hex Rod Precision - Provides superior torque transmission and alignment control
Single-Stroke Installation - Enables complete insertion in one motion
Cross-Compatible - Works with standard drill chucks and impact drivers
The hex rod configuration proves particularly effective for high-volume production environments, offering repeatable installation force and reduced tool wear compared to angled alternatives. Proper mandrel selection and RPM calibration ensure optimal thread form preservation in parent materials.
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Drilling
Select the correct standard drill bit based on specifications. Drill to a depth ≥ wire thread insert installation depth. Avoid conical holes and chip accumulation. Limit counterboring to ≤0.4 pitch depth to ease insert insertion.
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Tapping
Use a tangless thread insert tap with specified thread specs. Ensure tapping depth exceeds insert length (tap entirely for through holes). Select proper tapping methods and lubrication to control thread tolerance. Clean holes with compressed air or a radial-hole nozzle for blind holes. Verify high-precision threads using insert-specific gauges.
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Screw on the tailless thread insert
Screw the tailless thread insert onto the installation tool of the corresponding specification to ensure that the hook on the tailless thread insert is fully engaged with the slot on the head of the installation tool.
-
Screw into the threaded hole
Align the tool head with the threaded hole and rotate to screw the tailless thread insert to the appropriate depth
- The tailless installation tool can also be installed on an electric or pneumatic tool to improve the installation efficiency.
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Screw-Lock Series Tangless Thread Insert/UNC |
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Size |
Nominal Length** |
Length |
Space Standard |
MS No. |
|
2-56 |
1 |
0.086 |
NAS1130-02L10 |
MS21209-C0210 |
|
1-1/2'' |
0.129 |
NAS1130-02L15 |
MS21209-C0215 |
|
|
2 |
0.172 |
NAS1130-02L20 |
MS21209-C0220 |
|
|
4-40 |
1 |
0.112 |
NAS1130-04L10 |
MS21209-C0410 |
|
1-1/2'' |
0.168 |
NAS1130-04L15 |
MS21209-C0415 |
|
|
2 |
0.224 |
NAS1130-04L20 |
MS21209-C0420 |
|
|
6-32 |
1 |
0.138 |
NAS1130-06L10 |
MS21209-C0610 |
|
1-1/2'' |
0.207 |
NAS1130-06L15 |
MS21209-C0615 |
|
|
2 |
0.276 |
NAS1130-06L20 |
MS21209-C0620 |
|
|
8-32 |
1 |
0.164 |
NAS1130-08L10 |
MS21209-C0810 |
|
1-1/2'' |
0.246 |
NAS1130-08L15 |
MS21209-C0815 |
|
|
2 |
0.328 |
NAS1130-08L20 |
MS21209-C0820 |
|
|
10-24 |
1 |
0.19 |
NAS1130-3CL10 |
MS21209-C1-10 |
|
1-1/2'' |
0.285 |
NAS1130-3CL15 |
MS21209-C1-15 |
|
|
2 |
0.38 |
NAS1130-3CL20 |
MS21209-C1-20 |
|
|
1/4''-20 |
1 |
0.25 |
NAS1130-4L10 |
MS21209-C4-10 |
|
1-1/2'' |
0.375 |
NAS1130-4L15 |
MS21209-C4-15 |
|
|
2 |
0.5 |
NAS1130-4L20 |
MS21209-C4-20 |
|
|
5/16''-18 |
1 |
0.312 |
* |
MS21209-C5-10 |
|
1-1/2'' |
0.469 |
* |
MS21209-C5-15 |
|
|
2 |
0.625 |
* |
MS21209-C5-20 |
|
|
3/8''-16 |
1 |
0.375 |
* |
MS21209-C6-10 |
|
1-1/2'' |
0.562 |
* |
MS21209-C6-15 |
|
|
2 |
0.75 |
* |
MS21209-C6-20 |
|
|
10-32 |
1 |
0.19 |
NAS1130-3L10 |
MS21209-F1-10 |
|
1-1/2'' |
0.285 |
NAS1130-3L15 |
MS21209-F1-15 |
|
|
2 |
0.38 |
NAS1130-3L20 |
MS21209-F1-20 |
|
|
1/4''-28 |
1 |
0.25 |
NAS1130-4FL10 |
MS21209-F4-10 |
|
1-1/2'' |
0.375 |
NAS1130-4FL15 |
MS21209-F4-15 |
|
|
2 |
0.5 |
NAS1130-4FL20 |
MS21209-F4-20 |
|
|
5-16''-24 |
1 |
0.312 |
* |
MS21209-F5-10 |
|
1-1/2'' |
0.469 |
* |
MS21209-F5-15 |
|
|
2 |
0.625 |
* |
MS21209-F5-20 |
|
|
3/8''-24 |
1 |
0.375 |
* |
MS21209-F6-10 |
|
1-1/2'' |
0.562 |
* |
MS21209-F6-15 |
|
|
2 |
0.75 |
* |
MS21209-F6-20 |
|