English
Brand Name: KernalCoil Thread Insert
Place of Origin: Shenzhen, China
Material: Stainless steel 303 (Stainless steel 304 and 316 can be customized)
Specification Range: Metric M2.5-M24
Application: Applicable to automotive manufacturing, engineering machinery etc.
Product Design: Slotted ends (one-slot) for easy tool installation
Type: 302 Cutting Slot
Reliability Test: Mechanical dimensions, Hardness test, Salt spray endurance test
Certification: ISO 9001:2015, IATF 16949:2016, SGS
Support Sevice: OEM/ODM Custom Machining
Package: 1000pcs/package, according to customer's requirement.
Delivery: 3-5 days for regular spec, 7-15 days for non-standard customization
Detail
What Are Self-Tapping Threaded Inserts?
Self-tapping threaded inserts (STIs) are precision-engineered components designed to create durable machine screw threads in non-threaded or damaged holes. These helical fasteners serve as reinforced anchoring solutions, particularly valuable when working with soft, brittle, or composite materials that lack sufficient structural integrity for direct threading.
Key Applications Across Industries
-
Aerospace Manufacturing
STIs are strategically embedded in aluminum aircraft components to enhance load-bearing capacity and vibration resistance, meeting strict aviation safety standards (AS/EN/JIS certified options available). -
Automotive Engineering
Widely implemented in engine blocks and transmission systems, these inserts prevent thread stripping in cast iron and magnesium alloys exposed to thermal cycling and mechanical stress. -
Industrial Equipment
Machinery manufacturers utilize STIs for thread repair and material reinforcement in high-wear applications, particularly with powdered metal parts and thermoplastic housings. -
Commercial Furniture Production
Essential for creating reusable fastening points in engineered wood products like MDF and particle board, enabling repeated assembly/disassembly without material degradation.
Technical Advantages
- Material Compatibility: Functions effectively in substrates ranging from 30-150 HB hardness
- Installation Efficiency: Requires no pre-tapping or adhesives - installs with standard hex keys
- Corrosion Resistance: Available in stainless steel A2/A4 and brass alloys for harsh environments
- Load Distribution: Helical design reduces peak stress concentrations by up to 40% vs direct threading
Performance Comparison
|
Feature |
Direct Tapping |
STI Solution |
|
Pullout Strength |
100-200 lbf |
350-600 lbf |
|
Reusability |
1-3 cycles |
50+ cycles |
|
Installation Time |
2-3 min/hole |
45 sec/hole |
|
Temperature Range |
-20°C to 120°C |
-60°C to 400°C |
Self-Threading Inserts: Cost-Efficient Fastening Solutions
Self-Forming Thread Technology
Our threaded inserts eliminate pre-tapping requirements, directly forming precise mating threads in base materials to reduce production expenses by 40-60% compared to traditional fastening methods.
Damaged Thread Restoration
Specially engineered helical grooves effectively restore stripped or worn parent threads to OEM specifications, enabling reuse of existing bolt sizes without component replacement.
Vibration-Resistant Performance
The patented coil design provides superior resistance to rotational loosening, maintaining 98% clamping force retention under continuous vibration per ASTM D1185 testing standards.
Error-Proof Installation
Simplified insertion process achieves near-zero defect rates in installation, requiring 68% less labor time than conventional wire thread inserts while ensuring consistent torque values (±5% variance).
|
Type 302 |
Length B(mm) |
External Thread E |
Reference Drilling Diameter (mm) |
Minimum Drilling |
||
|
Plastics |
Aluminum |
Cast Iron |
||||
|
M2.5-0.45 |
6 |
M4.5-0.5 |
4.0-4.1 |
4.1-4.2 |
4.2-4.3 |
8 |
|
M3-0.5 |
6 |
M5-0.5 |
4.5-4.6 |
4.6-4.7 |
4.7-4.8 |
8 |
|
M3.5-0.6 |
8 |
M6-0.75 |
5.3-5.4 |
5.5-5.6 |
5.6-5.7 |
10 |
|
M4-0.7 |
8 |
M6.5-0.75 |
5.8-5.9 |
6.0-6.1 |
6.1-6.2 |
10 |
|
M5-0.8 |
10 |
M8-1.0 |
7.1-7.2 |
7.3-7.5 |
7.5-7.6 |
13 |
|
M6-1.0 |
12 |
M9-1.0 |
8.1-8.2 |
8.3-8.5 |
8.5-8.6 |
15 |
|
M6-1.0 |
14 |
M10-1.5 |
9.0-9.2 |
9.2-9.3 |
9.3-9.4 |
17 |
|
M8-1.25 |
15 |
M12-1.5 |
10.6-10.8 |
11-11.2 |
11.2-11.4 |
18 |
|
M10-1.5 |
18 |
M14-1.5 |
12.6-12.8 |
13.0-13.3 |
13.2-13.4 |
22 |
|
M12-1.75 |
22 |
M16-1.5 |
14.6-14.8 |
15.0-15.3 |
15.2-15.4 |
26 |
|
M14-2.0 |
24 |
M18-1.5 |
16.6-16.8 |
17.0-17.3 |
17.2-17.5 |
28 |
|
M16-2.0 |
22 |
M20-1.5 |
18.6-18.8 |
19.0-19.3 |
19.2-19.5 |
27 |
|
M18-2.5 |
24 |
M22-1.5 |
20.6-20.8 |
21.0-21.3 |
21.2-21.5 |
29 |
|
M20-2.5 |
27 |
M26-1.5 |
24.6-24.8 |
25.0-25.3 |
25.2-25.5 |
32 |
|
M22-2.5 |
30 |
M26-1.5 |
24.6-24.8 |
25.0-25.3 |
25.2-25.5 |
36 |
|
M24-3.0 |
30 |
M30-1.5 |
28.6-28.8 |
29.0-29.3 |
29.2-29.5 |
36 |