Knobs

Part Number	Description / PDF	Quantity
504-0038 NTE Electronics, Inc.	JD-75-4-5 KNOB .750X.250	22
504-0052 NTE Electronics, Inc.	HD-90-1-5 KNOB .925X.250	57
504-0100 NTE Electronics, Inc.	JD-50-1-5 KNOB .500IN	8
504-0035 NTE Electronics, Inc.	JD-75-1-5 KNOB .750X.250	43
504-0017 NTE Electronics, Inc.	DDS-50-2-6 KNOB .500X.125	8
504-0064 NTE Electronics, Inc.	DDSPT-75-3-6MM KNOB .750N	20
504-0033 NTE Electronics, Inc.	JD-50-3-5 KNOB .500X.250	8
504-0046 NTE Electronics, Inc.	HD-50-2-6 KNOB .500X.125	415
504-0107 NTE Electronics, Inc.	JD-75-4-6 KNOB .750IN	19
504-0012 NTE Electronics, Inc.	DD-90-4-5 KNOB .925X.250	11
504-0027 NTE Electronics, Inc.	DDS-90-4-5 KNOB .925X.250	10
504-0021 NTE Electronics, Inc.	DDS-75-2-6 KNOB .750X.125	76

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