Knurled Threaded Insert( Nut Insert )
Advanced Fastening Solutions for Lightweight Thin-Gauge Assemblies via Premier Taiwan Engineering
As industries transition toward lightweighting and compact designs, engineers often encounter the paradox of needing high-strength thread engagement within thin-gauge materials where vertical space is at a premium. Our Truncated / Double-layer Rivet Nuts are engineered to bridge this gap. By integrating Taiwan’s premier Cold Forging technology with CNC precision, we deliver a solution that provides maximum thread depth without the interference caused by traditional long-body fasteners. This is the ultimate choice for Tier 1 suppliers seeking to optimize assembly footprints while maintaining rigorous safety standards.
Technical Highlights
1. Optimized Grain Flow: Exceptional Fatigue & Shear Strength
Unlike traditional machined-only components, our rivet nuts are formed through cold-heading. This process preserves the metal's continuous Grain Flow, which significantly enhances the hardness and structural rigidity of the internal threads. The result is superior fatigue resistance and thread integrity, ensuring reliability even under prolonged dynamic stress and vibration.
2. Truncated Geometric Advantage: Maximum Thread Engagement in Compact Spaces
The innovative truncated (double-layer) design allows for a shorter overall body length while providing the same effective thread engagement as standard fasteners. This geometric optimization enables engineers to design thinner, more compact assemblies without sacrificing Pull-out Strength. It effectively eliminates component interference issues in tight environments, such as avionics bays or EV battery enclosures.
3. Superior Thin-Gauge Performance: Preserving Substrate Flatness
Specifically optimized for thin-gauge sheet metal applications, the deformation zone is engineered to distribute stress evenly during the setting process. This prevents substrate warping or surface dimpling, maintaining the aesthetic and structural integrity of the base material—ideal for automotive interiors, aerospace paneling, and marine instrumentation.
Spec Summary
Material Selection: High-grade Stainless Steel (SUS304/316), Alloy Steel, and Lightweight Aluminum.
Thread Size: M3 to M12 (Metric); equivalent UNC/UNF sizes available.
Grip Range: Optimized for sheet thickness from 0.5mm to 3.0mm.
( Nut Insert )
Top Screw ST series Threaded insert is designed to be installed in the small space. The body length after riveting is shorter than any standard type of blind rivet nut. The head of insert can press tightly against surface of application. ST series can be installed on application which the thickness is thicker than 0.03” (0.76mm) and the application can be most any type of material. The material for ST series can be Steel and Stainless Steel. Further information about recommended hole size, grip range and application thickness. Please refer below table.
APPLICATION：
ST series Threaded insert is commonly used in any industry including automobile industry.
MATERIAL AVALIABLE：
STEEL
OTHER SIZE, MATERIAL ARE AVAILABLE UPON REQUEST
Hole size / Material Thicknss Chart
| Thread Size | .030-.090 MAT. Thickness | .091-.124 MAT. Thickness | ||
|---|---|---|---|---|
| Drill size | Decimal | Drill size | Decimal | |
| UNC 4-40 | 3/16 | .1875 | #10 | .1935 |
| UNC 6-32 | 7/32 | .2188 | #2 | .2210 |
| UNC 8-32 | 1/4 | .2500 | "F" | .2575 |
| UNC 10-24 | 9/32 | .2812 | "L" | .2900 |
| UNC 10-32 | 9/32 | .2812 | "L" | .2900 |
| UNC 1/4-20 | 0.375 | .3750 | 0.375 | .3750 |
| UNC 5/16-18 | 0.5 | .5000 | 0.5 | .5000 |
| UNC 3/8-16 | 0.5625 | .5625 | 0.5625 | .5625 |
| UNC 1/2-13 | 0.75 | .7500 | 0.765625 | .7656 |
| Thread Size | .030-.090 MAT. Thickness | .091-.124 MAT. Thickness | ||
| Drill size | Decimal | Drill size | Decimal | |
| ISO M3x0.5 | 4.75 | .1875 | 4.90 | .1935 |
| ISO M4x0.7 | 6.35 | .2500 | 6.52 | .2570 |
| ISO M5x0.8 | 7.14 | .2812 | 7.36 | .2900 |
| ISO M6x1.0 | 9.52 | .3750 | 9.52 | .3750 |
| ISO M8x1.25 | 12.70 | .5000 | 12.70 | .5000 |
| ISO M10x1.5 | 14.28 | .5625 | 14.28 | .5625 |
| ISO M12x1.75 | 19.05 | .7500 | 19.44 | .7656 |
| .125-.186 MAT. Thickness | .187-Over Mat. Thickness | ||
|---|---|---|---|
| Drill size | Decimal | Drill size | Decimal |
| #10 | 3/16 | .1875 | #10 |
| #1 | 7/32 | .2188 | #2 |
| 17/64 | 1/4 | .2500 | "F" |
| "L" | 9/32 | .2812 | "L" |
| "L" | 9/32 | .2812 | "L" |
| "W" | 0.375 | .3750 | 0.375 |
| 33/64 | 0.5 | .5000 | 0.5 |
| 37/64 | 0.5625 | .5625 | 0.5625 |
| 25/32 | 0.75 | .7500 | 0.765625 |
| .125-.186 MAT. Thickness | .187-Over Mat. Thickness | ||
| Drill size | Decimal | Drill size | Decimal |
| 4.90 | .1935 | 4.97 | .1960 |
| 6.74 | .2656 | 6.74 | .2656 |
| 7.36 | .2900 | 7.54 | .2969 |
| 9.80 | .3860 | 9.52 | .3906 |
| 13.09 | .5156 | 13.09 | .5156 |
| 14.68 | .5781 | 14.68 | .5781 |
| 19.83 | .7810 | 20.24 | .7970 |
Open End Type
| Thread Size/ Part NO. | HD(inch) ±0.005 | L(inch) ±0.015 | D(inch) Max | IL(inch) Max | Hole Depth Min |
|---|---|---|---|---|---|
| UNC 4-40 CATI440 | .211 | .370 | .1875 | .205 | .400 |
| UNC 6-32 CATI632 | .240 | .370 | .2185 | .205 | .400 |
| UNC 8-32 CATI832 | .269 | .370 | .2495 | .205 | .400 |
| UNC 10-24 CATI1024 | .306 | .370 | .2805 | .205 | .400 |
| UNC 10-32 CATI1032 | .306 | .370 | .2805 | .205 | .400 |
| UNC 1/4--20 CATI420 | .400 | .515 | .3745 | .275 | .540 |
| UNC 5/16-18 CATI518 | .528 | .615 | .4995 | .325 | .640 |
| UNC 3/8-16 CATI616 | .588 | .745 | .5615 | .390 | .770 |
| UNC 1/2-13 CATI1213 | .800 | .935 | .7485 | .485 | .960 |
| Thread Size/ Part NO. | HD(mm) ±0.127 | L(mm) ±0.38 | D(mm) Max | IL(mm) Max | Hole Depth Min |
| ISO M3x0.5 CATM350 | 5.36 | 9.40 | 4.76 | 5.21 | 10.16 |
| ISO M4x0.7 CATM470 | 6.83 | 9.40 | 6.34 | 5.21 | 10.16 |
| ISO M5x0.8 CATM580 | 7.77 | 9.40 | 7.12 | 5.21 | 10.16 |
| ISO M6x1.0 CATM610 | 10.16 | 13.08 | 9.51 | 6.99 | 13.72 |
| ISO M8x1.25 CATM8125 | 13.41 | 15.62 | 12.69 | 8.26 | 16.26 |
| ISO M10x1.5 CATM1015 | 14.94 | 18.92 | 14.26 | 9.91 | 19.56 |
| ISO M12x1.75 CATM12175 | 20.32 | 23.75 | 19.01 | 12.32 | 24.38 |
Close End Type
| Thread Size/ Part NO. | HD(inch) ±0.005 | LB(inch) ±0.015 | ILB (inch) Max | IATD (inch) Max | Hole Depth Min |
|---|---|---|---|---|---|
| UNC 4-40 CATI440 | .211 | .660 | .495 | .395 | .400 |
| UNC 6-32 CATI632 | .240 | .675 | .505 | .410 | .400 |
| UNC 8-32 CATI832 | .269 | .675 | .505 | .410 | .400 |
| UNC 10-24 CATI1024 | .306 | .685 | .520 | .385 | .400 |
| UNC 10-32 CATI1032 | .306 | .685 | .520 | .385 | .400 |
| UNC 1/4--20 CATI420 | .400 | 1.005 | .760 | .615 | .540 |
| UNC 5/16-18 CATI518 | .528 | 1.005 | .770 | .630 | .640 |
| UNC 3/8-16 CATI616 | .588 | 1.450 | 1.095 | .890 | .770 |
| UNC 1/2-13 CATI1213 | .800 | NA | NA | NA | .960 |
| Thread Size/ Part NO. | HD(mm) ±0.127 | LB(mm) ±0.38 | ILB(mm) Max | IATD(mm) Max | Hole Depth Min |
| ISO M3x0.5 CATM350 | 5.36 | 16.77 | 12.57 | 10.03 | 10.16 |
| ISO M4x0.7 CATM470 | 6.83 | 17.15 | 12.83 | 10.41 | 10.16 |
| ISO M5x0.8 CATM580 | 7.77 | 17.40 | 13.21 | 9.78 | 10.16 |
| ISO M6x1.0 CATM610 | 10.16 | 25.53 | 19.30 | 15.62 | 13.72 |
| ISO M8x1.25 CATM8125 | 13.41 | 27.05 | 19.56 | 16.00 | 16.26 |
| ISO M10x1.5 CATM1015 | 14.94 | 36.83 | 27.81 | 22.61 | 19.56 |
| ISO M12x1.75 CATM12175 | 20.32 | NA | NA | NA | 24.38 |
( Nut Insert )
Top Screw ST series Threaded insert is designed to be installed in the small space. The body length after riveting is shorter than any standard type of blind rivet nut. The head of insert can press tightly against surface of application. ST series can be installed on application which the thickness is thicker than 0.03” (0.76mm) and the application can be most any type of material. The material for ST series can be Steel and Stainless Steel. Further information about recommended hole size, grip range and application thickness. Please refer below table.
APPLICATION：
ST series Threaded insert is commonly used in any industry including automobile industry.
MATERIAL AVALIABLE：
STEEL
OTHER SIZE, MATERIAL ARE AVAILABLE UPON REQUEST