Description
The Keep-Nut™ IM2S/P1-4.20/H6 is a press-in, mechanical anchoring insert with a 1/4-20 UNC thread and 6mm body height, equipped with two elastic stainless steel crowns for high-performance anchoring in hard, thin materials. Ideal for undermount sink installations, stone panels, and solid surface furniture, this insert provides a flush-mounted, concealed, and load-rated threaded connection—without adhesives, epoxy, or special tooling.
Made from 303 and 316L stainless steel with a durable PA6 nylon body, the IM2S insert is engineered for longevity, corrosion resistance, and ease of installation into materials 8.5mm or thicker.
Key Features & Benefits
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Dual-crown anchoring distributes load for maximum retention
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Flush-mount design allows concealed fastening
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1/4-20 UNC internal thread – compatible with standard fasteners
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6mm height supports material thickness ≥8.5mm
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Adhesive-free installation – fast and clean process
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Mechanical retention prevents insert extraction
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High pull-out resistance in granite, quartz, UHPC, Corian®, porcelain, and more
Compatible Materials
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Natural Stone: Granite, Marble, Travertine, Slate, Quartz, Limestone
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Sintered Stone: Dekton®, Lapitec®, Neolith®
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Solid Surfaces: Corian®, Staron®, Hi-Macs®, Krion®, Okite®
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Porcelain & Ceramic: Crossville®, SapienStone®, GRES
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Other Substrates: HPL, UHPC, Glass, Carbon Fiber, Composites, Metals
Common Applications
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Undermount sink attachment
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Interior or decorative wall panels
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Furniture, shelving, and casework
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Architectural assemblies
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Lightweight mechanical fastening
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | IM2S/P1-4.20/H6 |
| Thread Size | 1/4-20 UNC |
| Insert Height (h1) | 6mm (0.24 in) |
| Hole Diameter (d2) | 12mm ±0.2 |
| Hole Depth (l2) | 6.5mm |
| Surface Min. Thickness | 8.5mm |
| Crowns | 2 |
| Press-In Force | 0.4 kN (≈90 lbf) |
| Pull-Out Strength | 2.5 kN (≈562 lbf) |
| Materials | 303/316L Stainless Steel, PA6 |
| Finish | Natural |
Compliance & Certifications
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ASTM C1354 and ETA tested for mechanical anchoring
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Fire-resistant and self-extinguishing
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ADA-friendly flush-mount capability
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No through-thread – prevents over-penetration during assembly
Available Sizes & Performance Comparison
Use the chart below to compare other 1/4-20 Keep-Nut inserts and link to additional size options:
| Part Number | Thread | Min. Surface Thickness | Thread Depth (H1) | Hole Diameter (D2) | Hole Depth (L2) | Crowns | Install Force kN (lbf) | Pull-Out Force kN (lbf) |
|---|---|---|---|---|---|---|---|---|
| IM1S/P1.4-20/H5 | 1/4-20 | 8.0 mm (.31″) | 4.5 mm (.18″) | 12 mm | 5.5 mm (.22″) | 1 | 0.2 (44.96) | 0.9 (202.33) |
| IM2S/P1.4-20/H6 | 1/4-20 | 8.5 mm (.34″) | 5.5 mm (.22″) | 12 mm | 6.5 mm (.26″) | 2 | 0.4 (89.92) | 2.5 (562.02) |
| IM4S/P1.4-20/H8.5 | 1/4-20 | 11.0 mm (.43″) | 7.5 mm (.30″) | 12 mm | 9.0 mm (.36″) | 4 | 1.0 (224.81) | 3.5 (786.83) |
| IM4S/P1.4-20/H15 | 1/4-20 | 17.5 mm (.69″) | 14.0 mm (.55″) | 12 mm | 15.5 mm (.61″) | 4 | 1.0 (224.81) | 4.2 (944.20) |
Click the part number links above to view related products
Packaging & Ordering Info
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Part Number: IM2S/P1-4.20/H6
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Accessories: Go/No-Go gauge, setting tools, CNC and KDM115 drill bits
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Support: On-demand technical assistance for installers, designers, and engineers
Contact & Support
Need help choosing the right Keep-Nut insert for your application?
Need assistance choosing the right insert for your material? Contact our technical sales team at (800) 220-1966 or email [email protected].
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