The Knob, cataloged under National Stock Number 5355-01-244-2890, is classified within Federal Supply Class 5355 (Knobs and Pointers) of the Hardware and Abrasives group. The manufacturer of record is Kongsberg Simrad Inc Dba Research & Development. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5355-01-244-2890 |
| Primary Part Number | B-20 |
| Item Name | Knob |
| FSC / FSG | 5355 / 53 — Knobs and Pointers |
| Manufacturer | Kongsberg Simrad Inc Dba Research & Development |
| Status | ACTIVE |
| Distance From Hole Center to Knob/skirt Base | 0.375 INCHES NOMINAL IN |
| Overall Thickness | 0.625 INCHES NOMINAL IN |
| Skirt Outside Diameter | 0.750 INCHES NOMINAL IN |
| Style Designator | ROUND |
| Outside Diameter | 0.750 INCHES NOMINAL IN |
| Reference Marking | DOT AND GROOVE |
| Setscrew Hole Quantity | 1 |
| Nominal Thread Size | 0.099 INCHES SCREW HOLE IN |
| Gripping Surface Condition | GRIP AID |
| Color | GRAY/GREY |
| Skirt Design | NONDETACHABLE |
| Screw Drive Type | POZIDRIVE |
| Thread Quantity Per Inch | 48 SCREW HOLE |
| Material | COPPER ALLOY AND PLASTIC |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SCREW HOLE |
| Skirt Style | STEPPED |
| Attachment Method | SETSCREWS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5355-01-244-2890 is a Knob, manufactured by Kongsberg Simrad Inc Dba Research & Development, classified under FSC 5355, Knobs and Pointers. Status: active.
NSN 5355-01-244-2890 has 2 manufacturer part numbers on file: B-20 (Kongsberg Simrad Inc Dba Research & Development), B-20 (Simrad Robertson Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-287-4058, 9140-01-470-4520. Verify interchangeability with system specifications before substitution.
Key specifications for B-20: Distance From Hole Center to Knob/skirt Base: 0.375 INCHES NOMINAL IN; Overall Thickness: 0.625 INCHES NOMINAL IN; Skirt Outside Diameter: 0.750 INCHES NOMINAL IN; Style Designator: ROUND. 17 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.