Description
View the NEW Keep-Nut NSI Report
Recommended by Wilsonart for sink installation undermounts.
KEEP-NUT™ Press-in Self-anchoring Inserts, 10-24 Thread
|
Type/Thread/Height |
D1 Thread |
Surface Min. Thickness** |
H1 Thread Depth |
D2 Hole Diameter ⌀ ±0.2 |
L2 Hole Depth +1.0 |
No. of Crowns |
Installation Force kN (lbf) |
Pull-Out Force kN (lbf) |
| IM1S/P10-24/H5 | 10-24 | 8.0 mm (.31″) | 4.5 mm (.18″) | 12 mm | 5.5 mm (.22″) | 1 | 0.2 (44.96) | 0.9 (202.33) |
| IM2S/P10-24/H6 | 10-24 | 8.5 mm (.34″) | 5.5 mm (.22″) | 12 mm | 6.5 mm (.26″) | 2 | 0.4 (89.92) | 2.5 (562.02) |
| IM4S/P10-24/H8.5 | 10-24 | 11.0 mm (.43″) | 7.5 mm (.30″) | 12 mm | 9.0 mm (.36″) | 4 | 1.0 (224.81) | 3.5 (786.83) |
KEEP-NUT™ press-in self-anchoring inserts by Specialinsert is a revolutionary press-in anchor insert commonly used for a number of applications including undermount sink installation, ventilated facades, cladding and furniture. These small inserts are designed to install into a wide range of surfaces including granite, marble, quartz, solid surface, HPL, glass, fiber cement, and other compact materials.
The solid surface insert’s small size also lends itself to be installed into extremely thin surfaces while also being extremely strong. In addition, the Keep-Nut™ is manufactured in stainless steel and it’s made of a threaded bush with a set of elastic crowns and a plastic ring for holding the complete set of parts together.
Advantages:
- Simple hole preparation
- Quick installation
- No need for resins or adhesives
- Radial force is produced only while the insert is under tensile load. The crowns spread the load into the parent material, allowing large loads to be carried
- Thread stops before end of insert, avoiding extraction as a result of the use of an excessively long bolt
Testing Data:
| Material | KEEP-NUT™ Type | Average Pull-Out Load on a Single Insert (lbs) |
| Granite 20mm | IM4S/P1-4.20/H8.5 | 1080 |
| Marble 20mm | IM4S/P1-4.20/H8.5 | 849 |
| Travertine 20mm | IM4S/P1-4.20/H8.5 | 496 |
| Fiber Cement (high density) 12mm | IM4S/P1-4.20/H8.5 | 606 |
| Fiber Cement (high density) 10mm | IM4S/P1-4.20/H8.5 | 527 |
| Fiber Cement (high density) 8mm | IM2S/P1-4.20/H6 | 277 |
| HPL 12mm | IM4S/P1-4.20/H8.5 | 1194 |
| HPL 10mm | IM4S/P1-4.20/H8.5 | 1348 |
| HPL 8mm | IM2S/P1-4.20/H6 | 596 |
| Corian 12mm | IM4S/P1-4.20/H8.5 | 1068 |
| Corian 10mm | IM2S/P1-4.20/H6 | 650 |
| Engineered Stone 15mm | IM4S/P1-4.20/H8.5 | 672 |
Installation
Recommended by Wilsonart for sink installation undermounts.
U.S. Patent No. 10,473,141 (the ‘141 Patent)
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