The Knob, cataloged under National Stock Number 5355-00-343-2273, is classified within Federal Supply Class 5355 (Knobs and Pointers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5355-00-343-2273 |
| Primary Part Number | 20508R |
| Item Name | Knob |
| FSC / FSG | 5355 / 53 — Knobs and Pointers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Overall Thickness | 1.437 INCHES NOMINAL IN |
| Style Designator | ROUND |
| Outside Diameter | 1.968 INCHES NOMINAL IN |
| Nominal Thread Size | 0.375 INCHES RECEPTACLE IN |
| Shank Style | CONCAVE |
| Gripping Surface Condition | SMOOTH |
| Thread Quantity Per Inch | 24 RECEPTACLE |
| Material | PLASTIC |
| Thread Series Designator | UNF RECEPTACLE |
| Attachment Method | SCREW ON |
| 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 |
|---|---|
| 20508R | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 500822 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5355-00-343-2273 is a Knob, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5355, Knobs and Pointers. Status: active.
NSN 5355-00-343-2273 has 1 manufacturer part number on file: 20508R (Northrop Grumman Systems Corporation).
4 possible matches (shared part number, not a government interchangeability claim): 1660-00-507-0430, 5905-00-617-3012, 2530-01-175-5855. Verify interchangeability with system specifications before substitution.
Key specifications for 20508R: Overall Thickness: 1.437 INCHES NOMINAL IN; Style Designator: ROUND; Outside Diameter: 1.968 INCHES NOMINAL IN; Nominal Thread Size: 0.375 INCHES RECEPTACLE IN. 10 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.