Knobs

Part Number	Description / PDF	Quantity
29W014B Richco, Inc. (Essentra Components)	WING THUMB SCREW KNOBS, NO SCREW	2998
KSM5----N4--5-- Richco, Inc. (Essentra Components)	SELF-ASSEMBLY PUSH PULL KNOB 0.6	5000
KN4C----R3-BS21 Richco, Inc. (Essentra Components)	CLAMPING STAR KNOB 1.570 IN DIAM	350
29F038B Richco, Inc. (Essentra Components)	FLOWERETTE THUMB SCREW KNOBS, NO	998
KN5C40005SA--21 Richco, Inc. (Essentra Components)	CLAMPING STAR KNOB 2.250 IN DIAM	500
KN4C20003P4--21 Richco, Inc. (Essentra Components)	CLAMPING 3 ARM KNOB 1.750 IN DIA	750
KN4C----F4-B-21 Richco, Inc. (Essentra Components)	CLAMPING FLUTED KNOB 1.750 IN DI	600
KN4C----4P7B-21 Richco, Inc. (Essentra Components)	CLAMPING 4 ARM KNOB 2.500 IN DIA	500
29W516RD Richco, Inc. (Essentra Components)	WING THUMB SCREW KNOBS, NO SCREW	1988
KN5C15005S2--21 Richco, Inc. (Essentra Components)	CLAMPING STAR KNOB 1.380 IN DIAM	700
KN5C1500F4---21 Richco, Inc. (Essentra Components)	CLAMPING FLUTED KNOB 1.750 IN DI	500
KN4C----3P1--21 Richco, Inc. (Essentra Components)	CLAMPING 3 ARM KNOB 1.250 IN DIA	1000
KS4X----T3--5-- Richco, Inc. (Essentra Components)	SELF-ASSEMBLY T HANDLE KNOB 1.50	2000
KN4C10005S3--21 Richco, Inc. (Essentra Components)	CLAMPING STAR KNOB 1.750 IN DIAM	500
KSN4----N1--5-- Richco, Inc. (Essentra Components)	SELF-ASSEMBLY PUSH PULL KNOB 0.3	12350
KN5C1000RT5--21 Richco, Inc. (Essentra Components)	CLAMPING 3 ARM KNOB 2.000 IN DIA	500
KN5C05004S4--21 Richco, Inc. (Essentra Components)	CLAMPING 4 ARM KNOB 1.730 IN DIA	400
29M601RBL Richco, Inc. (Essentra Components)	ROUND PRESS LOCK THUMB SCREW KNO	972
KN4C----B1-L-21 Richco, Inc. (Essentra Components)	BALL KNOB 1.000 IN DIAMETER WITH	900
29R008B Richco, Inc. (Essentra Components)	ROUND THUMB SCREW KNOBS, NO SCRE	4985

Knobs

1. Overview

Knobs are mechanical components designed for manual adjustment, control, or fixation of devices and equipment. As critical elements in hardware systems, they provide user interfaces for torque transmission, positional adjustment, and functional control. Modern knob designs integrate ergonomic principles, material science, and precision engineering to ensure reliable performance across industrial, commercial, and consumer applications.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Wing Screws	Hand-adjustable fastening with wing-shaped heads	Panel fastening in electronics enclosures
Dial Knobs	Precision adjustment with graduated scales	Lab equipment and audio mixers
Keyed Locknuts	Security-focused design with key-operated adjustment	Machinery calibration systems
Pull-to-Release Knobs	Integrated locking mechanism with axial release	Industrial control panels

3. Structure and Composition

Typical knob assemblies consist of: - Body: Formed from metal alloys (aluminum, brass) or engineered plastics (nylon, polycarbonate) - Threaded Insert: Brass or stainless steel internal threads for secure mounting - Retention Feature: Knurling, splines, or set screws for shaft coupling - Surface Treatment: Anodizing, powder coating, or electroplating for corrosion resistance

4. Key Technical Specifications

Parameter	Significance
Material Hardness (Shore/Brinell)	Determines wear resistance and load capacity
Thread Engagement Depth	Affects axial load transmission efficiency
Maximum Torque Rating (Nm)	Critical for rotational force transmission
Temperature Resistance Range	Defines operational limits in extreme environments
Surface Friction Coefficient	Impacts tactile feedback and slip resistance

5. Application Fields

Industrial Machinery: CNC machine controls, conveyor belt tensioners
Electronics: Audio equipment attenuators, test instrument selectors
Automotive: HVAC control knobs, seat adjustment mechanisms
Aerospace: Cockpit instrumentation controls, avionics panel fasteners
Medical Devices: Diagnostic equipment parameter adjusters

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Misumi	KA2000 Series	Modular design with 12-position indexing
Knobs-R-Us	ProGrip XT	Ergonomic thermoplastic elastomer coating
Eclipse Industrial	Aluminum Anodized Line	MIL-STD-810G environmental compliance

7. Selection Guidelines

Key consideration factors: - Environmental conditions (temperature, chemical exposure) - Required torque transmission capacity - Mounting shaft geometry compatibility - Regulatory compliance (REACH, RoHS) - Aesthetic requirements for user interface

8. Industry Trends

Current development directions include: - Integration of smart materials with self-lubricating properties - Miniaturization for semiconductor manufacturing equipment - Haptic feedback enhancement through surface micro-texturing - Adoption of additive manufacturing for complex geometries - Increased use of corrosion-resistant polymer composites