Description
Most adhesive-mount nuts on the market use a perforated base, holes that let excess adhesive squeeze through the bottom during installation, which wastes adhesive and leaves a messier bond. The Specialinsert Master-Plate RS line skips that design. Each nut sits on a solid base with round spacer feet, Specialinsert’s literature calls this ATC (Adhesive Thickness Control), that set the bondline thickness on contact and keep the adhesive contained under the part instead of spilling out the sides. The result is a stronger, cleaner bond using a fraction of the adhesive a perforated base needs. The F1Y family covers three base shapes and several thread sizes, so you can match the footprint and thread to your hardware before you order.
- BETTER PERFORMANCE – Independent lab testing recorded a 26.9% increase in tensile (pull-out) strength and a 48.5% increase in shear strength versus a standard perforated base of the same size.
- BETTER AESTHETIC – No perforations means no adhesive squeeze-out around the base, so installs come out clean without extra wipe-down.
- COST REDUCTION – The RS base uses about 72% less adhesive per piece than a standard perforated base of the same size, since the round spacer feet meter the adhesive instead of letting it bleed through holes.
Lab Test Results: RS Base vs. Standard Perforated Base
| Test | Standard Base (avg) | Master-Plate RS (avg) | Increase |
|---|---|---|---|
| Tensile / Pull-Out | 3783 N (851 lbs) | 4802 N (1080 lbs) | 26.9% |
| Shear | 6390 N (1437 lbs) | 9486 N (2134 lbs) | 48.5% |
Adhesive Use: RS Base vs. Standard Perforated Base
| Base Style | Adhesive per Piece | Pieces per 50ml Cartridge | Avg. Cost per Bond* |
|---|---|---|---|
| Standard perforated base | 2.32 g | 21 | $0.38 |
| Master-Plate RS | 0.65 g | 75 | $0.10 |
*Based on an $8.00 50ml adhesive cartridge, per Specialinsert lab testing. Actual cost depends on the adhesive you use.
Shared Specifications, All F1Y Sizes
| Property | Value |
|---|---|
| Fastener Type | Female Hex Nut (F1) |
| Base Style | RS, solid base with round spacer feet (ATC), no perforations |
| Material | Zinc Plated Steel |
| Mounting Method | Adhesive bonding, no drilling or welding |
Choose Your Base Shape and Thread
| Base Shape | Thread | SKU |
|---|---|---|
| 23mm Round (Y23) | 10-24 | CCH-F1Y23-10-24 |
| 23mm Round (Y23) | 1/4-20 | CCH-F1Y23-1/4-20 |
| 32mm Square (Y3232) | 1/4-20 | CCH-F1Y3232-1/4-20 |
| 38mm Round (Y38) | 1/4-20 | CCH-F1Y38-1/4-20 |
| 38mm Round (Y38) | 10-24 | CCH-F1Y38-10-24 |
| 38mm Round (Y38) | 3/8-16 | CCH-F1Y38-3/8-16 |
For the variation attributes: “Base Shape” with values 23mm Round, 32mm Square, 38mm Round, and “Thread Size” with values 10-24, 1/4-20, 3/8-16, restricted to the six combinations above so buyers can’t select a pairing that doesn’t exist, like 32mm Square with 10-24.
Common Applications
- Bolt-on mounting points for brackets, panels, or hardware bonded to metal, plastic, composite, or stone surfaces
- Jobs where a perforated-base nut would leave visible glue squeeze-out and a cleaner finish matters
- Blind-hole or through-hole threaded connections where drilling or welding isn’t practical
- Cable and wire tie mounting points
- Sign, display, and panel assembly needing a low-profile, clean-finish threaded attachment point
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