The Knob, cataloged under National Stock Number 5355-00-644-2092, is classified within Federal Supply Class 5355 (Knobs and Pointers) of the Hardware and Abrasives group. The manufacturer of record is L3 Technologies, Inc. Div Communication Systems-East. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5355-00-644-2092 |
| Primary Part Number | M401840-504 |
| Item Name | Knob |
| FSC / FSG | 5355 / 53 — Knobs and Pointers |
| Manufacturer | L3 Technologies, Inc. Div Communication Systems-East |
| Status | ACTIVE |
| Shaft Accommodation Style | ROUND |
| Overall Thickness | 1.062 INCHES NOMINAL IN |
| Style Designator | ROUND |
| Outside Diameter | 1.750 INCHES NOMINAL IN |
| Setscrew Hole Quantity | 2 |
| Nominal Thread Size | 0.164 INCHES SCREW HOLE IN |
| Inside Diameter | 0.250 INCHES NOMINAL IN |
| Shank Style | CONCAVE |
| Gripping Surface Condition | GRIP AID |
| Color | BLACK |
| Thread Quantity Per Inch | 32 SCREW HOLE |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SCREW HOLE |
| 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 |
| Part Number | Manufacturer |
|---|---|
| M401840-504 PRIMARY | L3 Technologies, Inc. Div Communication Systems-East (USA) |
| Reference | Meaning |
|---|---|
| M401840-504 | 5/9 Secondary reference Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin |
NSN 5355-00-644-2092 is a Knob, manufactured by L3 Technologies, Inc. Div Communication Systems-East, classified under FSC 5355, Knobs and Pointers. Status: active.
NSN 5355-00-644-2092 has 1 manufacturer part number on file: M401840-504 (L3 Technologies, Inc. Div Communication Systems-East).
Key specifications for M401840-504: Shaft Accommodation Style: ROUND; Overall Thickness: 1.062 INCHES NOMINAL IN; Style Designator: ROUND; Outside Diameter: 1.750 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.