Overview
The KN900A1/4 is a high-quality control knob manufactured by TE Connectivity (ALCOSWITCH brand). This natural-finish aluminum knob is engineered for manual operation of industrial switches, controls, and equipment. With a straight knurl gripping surface and precision setscrews for attachment, it delivers dependable tactile feedback and secure, repeatable positioning in control applications.
Key Features
- Solid aluminum construction with natural anodized finish
- Straight knurl gripping surface for positive hand control
- Dual setscrew attachment (hexagon socket drive) ensures secure, vibration-resistant mounting
- Line reference marking on knob body for position indication
- Flared skirt design for improved ergonomic grip
- Proven ALCOSWITCH reliability for mission-critical applications
Technical Specifications
| Part Number | KN900A1/4 |
| Manufacturer | TE Connectivity (ALCOSWITCH) |
| Shaft Diameter | 0.250″ (6.4 mm) |
| Knob Outside Diameter | 0.940″ (23.9 mm) |
| Knob Height | 0.750″ (19.1 mm) |
| Skirt Outside Diameter | 1.440″ (36.6 mm) |
| Inside Diameter (Bore) | 0.251″ (6.4 mm) |
| Setscrew Quantity | 2 |
| Setscrew Type | Hexagon socket drive, #0-40 UNC thread |
| Skirt Style | Flared, nondetachable |
| Color | Natural aluminum |
| Reference Marking | Line indicator on body |
| Shaft Accommodation | Round shaft |
| NSN | 5355-01-313-8971 |
Typical Applications
- Industrial control panel switches and selector switches
- Equipment adjustment knobs for precision tuning
- Rocker switch control handles
- Valve and damper controls
- Military and aerospace equipment controls (NSN-listed)
- Laboratory instrument adjustments
Compatibility & Replacements
Compatible With
- TE Connectivity ALCOSWITCH switch families
- Round shafts 0.250″ (6.4 mm) diameter
- Standard switch and control applications with setscrew-mount requirements
- Panel-mount and desktop equipment with shaft-based controls
Replaces / Drop-In Replacement For
- ALCO KNSL-900A-1/4 (equivalent variant)
- KNSL-900A-1/4 (NSN 5355-01-313-8971)
Works With
- All industrial control switches with 0.250″ round shafts
- Manual operator switches (toggle, rocker, pushbutton frames)
- Potentiometers and rotary selector switches
- Standard 40 TPI setscrew-mount interface
