The Knob, cataloged under National Stock Number 5355-00-998-3336, is classified within Federal Supply Class 5355 (Knobs and Pointers) of the Hardware and Abrasives group. The manufacturer of record is Textron Aviation Inc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5355-00-998-3336 |
| Primary Part Number | S1240-5 |
| Item Name | Knob |
| FSC / FSG | 5355 / 53 — Knobs and Pointers |
| Manufacturer | Textron Aviation Inc |
| Status | ACTIVE |
| Shank Diameter | 0.400 INCHES NOMINAL IN |
| Inside Width | 0.116 INCHES NOMINAL IN |
| Shaft Accommodation Style | FLATTED ONE SIDE |
| Overall Thickness | 0.950 INCHES NOMINAL IN |
| Shank Length | 0.750 INCHES NOMINAL IN |
| Style Designator | ROUND |
| Outside Diameter | 1.050 INCHES NOMINAL IN |
| Inside Diameter | 0.166 INCHES NOMINAL IN |
| Shank Style | CONCAVE |
| Gripping Surface Condition | SMOOTH |
| Shank Radius | 0.200 INCHES NOMINAL IN |
| Material | PLASTIC |
| Attachment Method | PRESS FIT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| S1240-10 | Textron Aviation Inc (USA) |
| S1240-5 PRIMARY | Textron Aviation Inc (USA) |
| Reference | Meaning |
|---|---|
| S1240-5 | 3/9 Design control — primary reference Cessna Aircraft Company Dba Textron Aviation |
| S1240-10 | 5/9 Secondary reference Cessna Aircraft Company Dba Textron Aviation |
NSN 5355-00-998-3336 is a Knob, manufactured by Textron Aviation Inc, classified under FSC 5355, Knobs and Pointers. Status: active.
NSN 5355-00-998-3336 has 2 manufacturer part numbers on file: S1240-10 (Textron Aviation Inc), S1240-5 (Textron Aviation Inc).
Key specifications for S1240-5: Shank Diameter: 0.400 INCHES NOMINAL IN; Inside Width: 0.116 INCHES NOMINAL IN; Shaft Accommodation Style: FLATTED ONE SIDE; Overall Thickness: 0.950 INCHES NOMINAL IN. 13 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.