Description
Overview:
The Rubber Anchor Nut, M4 x 11, is a compact cavity fixing for secure, one-sided fastening in thin or hollow materials. It uses a durable black rubber body that compresses and expands inside the hole as the M4 screw is tightened, locking the fitting in place while helping to absorb vibration. This makes it useful on machinery panels, guards, enclosures, and fixtures where rear access is limited, such as on small plant, site equipment, and garden machinery. The 11 mm body length suits short standoff applications and lightweight brackets, clips, and trims. Part of the Mason Mate range, it is sold individually so you can buy exactly what you need for repairs, maintenance, and assembly tasks across workshops and site work.
Key Features:
- Size: M4 x 11 (accepts M4 machine screws; 11 mm rubber body length)
- Expanding rubber design grips securely inside cavities and thin sheet
- Installs from one side only; no special tools required-tighten the M4 screw to set
- Helps isolate vibration and damp noise on equipment and panels
- Suitable for a wide variety of materials, including metal, plastics, and composites
- Reduces risk of cracking or crushing delicate substrates by distributing load
- Corrosion-resistant performance: rubber sleeve shields the fixing area
- Ideal for repairs and retrofits where rear access is difficult
- Durable black rubber construction for everyday site and workshop use
- Part of the Mason Mate range; sizes available across the range from M4 x 11 to M12 x 75
Typical Applications:
Securing trims, covers, guards, signs, light brackets, cable clips, and accessories to hollow sections, thin sheet, and brittle panels. Common on equipment enclosures, generator and compressor panels, lawn and garden machinery shrouds, HVAC covers, and general fabrication where blind fixing is required.
Also known as:
Well nut, rubber well nut, blind expansion nut, rubber threaded insert, rubber captive nut, rubber rivet nut, blind fixing insert, rubber sleeve nut, expansion insert, threaded rubber insert.
Product Specifications
| L&S Part No. | 903 2390 |
|---|---|
| Manufacturer | Masonmate |
| OEM No. | 903 2390 50PK |
| Unit of Sale | Each |
| Key Features | - M4 x 11 size for M4 machine screws - Expanding rubber design for secure cavity grip - Installs from one side; no special tools needed - Isolates vibration and dampens noise - Suitable for metal, plastics, and composites |
