PSM Knob Clips are small spring steel fasteners designed to secure knobs, handles, or hubs onto shafts or panels—especially within plastic or mixed-material assemblies. They are a compact, low-cost alternative to inserts or set screws, offering positive retention, ease of installation, and minimal hardware complexity.
Advantages
> Low cost
> Replaces expensive inserts and grub screws
> Fast, easy assembly
> Holds firm
> Easy to remove for servicing
MATERIAL
CS60, CS70 carbon steel
METHOD OF ASSEMBLY:
Push knob clips over hub of knob, line up the flat of the clip with the flat of the shaft and simply push on.
WHEN SPECIFYING, PLEASE STATE:
- Quantity
- Prefix (CBKC)
- Part No.
- Finish code (e.g. 3000 CBKC-0111-00)
Key Features
Self-retaining design: The clip grips the knob hub or shaft and prevents it from spinning freely.
Constant pressure: The spring action maintains consistent clamping force even under vibration or thermal cycling.
Easy assembly and removal: Clips are typically pushed or snapped into place, allowing quick servicing.
Minimal space and material impact: Because they replace setscrews or inserts, knob clips reduce part count and bulk.
Versatility: Many knob clip styles, such as D-type, include flats or dimples to align with keyed shafts or flats for secure positioning.
Performance & Application Guidelines
Retention & Durability
The clip’s spring design should maintain consistent retention force through repeated use and temperature changes.
Test under load and vibration to confirm that the knob remains securely attached without slipping or wobbling.
Tolerance & Fit
Maintain tight but adequate clearance between the clip and hub for smooth assembly.
Avoid large mismatches that may cause over-stressing or reduced grip.
Use Cases & Examples
Control knobs and dials in electronic equipment
Appliance handles and rotary controls
Automotive interior fittings
Industrial or laboratory instruments where quick knob assembly and removal are needed
Dimensional Data & Sizes
*Denotes alternative version
Dimensions in millimetres