Description
The KEEP-NUT™ Full Set is the fastest and most secure solution for attaching undermount sinks to stone, quartz, porcelain, and solid surfaces. Designed for efficiency, strength, and reliability, this professional-grade anchoring system eliminates the need for adhesives or epoxies, providing a flush-mount, hidden installation.
Why Choose KEEP-NUT™?
✅ Fast, Simple Installation – Press-in, self-anchoring design with no adhesives or cure times.
✅ Exceptional Holding Strength – IM2S/P1.4-20/H6 offers an average pull-out resistance of 562 lbs per insert.
✅ Versatile Compatibility – Securely mounts to granite, marble, quartz, porcelain, solid surfaces, glass, UHPC, and composites.
✅ Reliable & Corrosion-Resistant – Constructed from stainless steel for durability and long-term performance.
✅ Precision Drilling – Compatible with CNC, a manual grinder, or the KDM115 Drilling Machine for on-site efficiency.
Included in Each Set:
- (1) KEEP-NUT™ IM2S/P1.4-20/H6 Press-In Anchor (1/4-20 Thread)
- (1) 1-1/4″ Allen Post (1/4-20 Thread)
- (1) Wing Nut (1/4-20 Thread)
- (1) Star Washer
- (1) “Z”-Shaped Sink Clip
IM2S/P1.4-20/H6 Keep-Nut Testing Data – Pull-Out Strength
| Material | Average Pull-Out Load (lbs) |
|---|---|
| Corian (10mm) | 650 lbs |
| Porcelain (12mm) | 562 lbs |
| Quartz (12mm) | 540 lbs |
| Granite (12mm) | 530 lbs |
| Marble (12mm) | 495 lbs |
Installation Methods
Regardless of the drilling method, installation follows the same process:
- Drill the hole using the appropriate bit for the material.
- Verify hole depth with the Go/No-Go Gauge.
- Press/punch in the KEEP-NUT™ using the Setting Tool.
- At the job site or in the shop, attach the sink using the Allen post, star washer, wing nut, and sink clip.
Tooling & Recommended Drill Bits
Essential Installation Tools
| Tool Name | Purpose | Part # |
|---|---|---|
| Go/No-Go Hole Tester & Depth Gauge | Ensures the hole diameter and depth are correct before inserting KEEP-NUT™ | CCH-KNGAUGE |
| Keep-Nut Setting Tool (1/4-20 Thread) | Presses/punches the KEEP-NUT™ insert into the drilled hole while deflecting impact from the surface | CCH-KNSET-1/4 |
Premium Bits (Longer Lasting & Universal for All Surfaces)
| Bit Type | Drilling Method | Compatible Surfaces | Part # |
|---|---|---|---|
| 11.5mm 5/8-11 Thread Grinder Bit (Orange) | Manual (KDM115 or Hand Grinder) | Universal – All Surfaces | FKN12X50EVO-UNC |
| 11.5mm CNC Bit (Orange) | CNC Router | Universal – All Surfaces | FKN12X10EVO |
Economic Bits (Optimized for Specific Surfaces)
| Bit Type | Drilling Method | Compatible Surfaces | Part # |
|---|---|---|---|
| 11.8mm CNC Bit (Blue) | CNC Router | Natural Stone & Quartz | CCH-KNBITCNC-11.8MM |
| 11.8mm CNC Bit (White) | CNC Router | Sintered Stone, Porcelain & Ceramic | CCH-KNBITCNC-11.8-D |
| 11.4mm 5/8-11 Thread Grinder Bit (Blue) | Manual (KDM115 or Hand Grinder) | Natural Stone & Quartz | CCH-KNBITGRI-11.4MM |
| 11.4mm 5/8-11 Thread Grinder Bit (White) | Manual (KDM115 or Hand Grinder) | Sintered Stone, Porcelain & Ceramic | CCH-KNBITGRI-11.4-D |
| 11.8mm Hand Drill/Drill Press Bit | Manual | Solid Surface & Plastics | CCH-KNBITSS-11.8MM (w/ Stop Collar) |
U.S. Patent No. 10,473,141
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