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RS PRO Clamping Knob, Multiple Lobes, Two-Part Polypropylene & Soft Touch Thermoplastic Elastomer, M8 Thread, 20mm 188-3458
Specifications
| Country of Origin | China |
|---|---|
| Brand | RS PRO |
| Colour | Black |
| Model | 188-3458 |
| Mount Type | Threaded Stud |
| Tensile Strength | 11MPa |
| Density | 1160kg/m³ |
| Thread Size | M8 |
| Elongation at Break | 470% |
| Thread Length | 20mm |
| Electrical Resistivity | 8 x 10^15ohm.cm |
| Insert Material | Zinc Plated Steel |
| Standards/Approvals | HB (1.5mm)UL94 |
| Water Absorption | 0.05% |
| Knob Shape | Multiple Lobes |
| Knob Diameter | 60 mm |
| Tear strength | 30kN/m |
| Abrasion | 190mm³ |
| Moulding shrinkage | 1.8% |
Key Features
- Features an ergonomic multiple lobe design for comfortable grip during frequent adjustments.
- Zinc plated steel insert ensures robust threaded strength and corrosion resistance in mounting applications.
- M8 threaded stud, 20mm thread length, suitable for a wide range of fixtures and assemblies.
- Knob diameter of 60mm provides optimal leverage and torque for clamping tasks.
- Flame retardant and UL 94 HB rated for enhanced safety in industrial environments.
- Low water absorption and high electrical resistivity, suitable for mechanical, fluid power and tool applications.
Product Description
The RS PRO 188-3458 Clamping Knob provides secure and comfortable manual adjustment for a range of mechanical, fluid power, and industrial hardware installations. Designed with multiple lobes, this clamping knob offers optimal ergonomics, making it ideal for repeated tightening and loosening by hand.
Its two-part moulding combines an inner core of polypropylene for structural strength and an over-moulded layer of soft-touch TPE-39 styrenic thermoplastic elastomer. This construction offers both a durable grip and improved user comfort. The black knob is equipped with a zinc-plated steel threaded insert providing M8 thread size and a 20mm thread length, compatible with standard mounting hardware and fixtures.
With a knob diameter of 60mm, the RS PRO clamping knob delivers excellent leverage and torque control, facilitating precise clamping. The high mechanical performance includes a tensile strength of 11 MPa, tear strength of 30 kN/m, remarkable elongation at break of 470%, and low moulding shrinkage of 1.8%. These properties ensure long-term resilience and reliability in demanding environments.
Safety and compliance are integral: the knob is UL 94 HB rated for flame retardancy, supports electrical resistivity up to 8 x 10^15 ohm.cm, and has low water absorption (0.05%). The zinc-plated steel insert adds corrosion protection for industrial applications, and the knob’s abrasion resistance (190mm³) is suited for frequent operational cycles.
Suitable for a wide array of clamping, fastening, and adjustment needs across manufacturing, laboratory setups, machine tool assemblies, commercial fixtures, and maintenance environments. Its robust, ergonomic design supports repeat and precise mechanical operation, making it a versatile choice for professionals.
Explore more RS PRO clamping knobs and industrial hand tool solutions in the Clamping Knobs category, or browse the full RS PRO product range on EnvMart for high-quality engineering components.
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Frequently Asked Questions
The clamping knob features an M8 thread size with a thread length of 20mm, making it compatible with standard mounting hardware and fixtures.
It is constructed with a polypropylene inner core for structural strength and an over-moulded layer of soft-touch thermoplastic elastomer (TPE) for improved grip and comfort.
The knob has a diameter of 60mm, providing optimal leverage and torque for clamping tasks.
The tensile strength of this model is 11 MPa, ensuring it can withstand significant mechanical stress during use.
This model has an electrical resistivity of 8 x 10^15 ohm.cm, suitable for applications where electrical insulation is important.
Yes, it is UL 94 HB rated for flame retardancy, enhancing safety in industrial environments.
The water absorption rate is low at 0.05%, making it suitable for various environmental conditions.
The clamping knob has an abrasion resistance rating of 190mm³, which is suitable for frequent operational cycles.
It is suitable for a wide array of clamping, fastening, and adjustment needs across manufacturing, laboratory setups, and machine tool assemblies.
The elongation at break for this clamping knob is 470%, indicating its ability to stretch before breaking.
The moulding shrinkage percentage is 1.8%, which is relevant for maintaining dimensional stability during production.
This model uses a threaded stud mount type, allowing for secure attachment to various fixtures.
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