The Knob, cataloged under National Stock Number 5355-00-144-7093, is classified within Federal Supply Class 5355 (Knobs and Pointers) of the Hardware and Abrasives group. The manufacturer of record is Electronic Hardware Corp Dba Electronic Hardware Corp. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5355-00-144-7093 |
| Primary Part Number | 121ADMA/WD |
| Item Name | Knob |
| FSC / FSG | 5355 / 53 — Knobs and Pointers |
| Manufacturer | Electronic Hardware Corp Dba Electronic Hardware Corp |
| Status | ACTIVE |
| Distance From Hole Center to Knob/skirt Base | 0.260 INCHES MAXIMUM IN |
| Inside Width | 0.222 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN |
| Shaft Accommodation Style | FLATTED ONE SIDE |
| Overall Thickness | 0.670 INCHES MINIMUM AND 0.730 INCHES MAXIMUM IN |
| Material Transparency | OPAQUE |
| Style Designator | ROUND |
| Outside Diameter | 1.240 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN |
| Setscrew Hole Quantity | 2 |
| Nominal Thread Size | 0.164 INCHES SCREW HOLE IN |
| Inside Diameter | 0.252 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN |
| Gripping Surface Condition | GRIP AID |
| Screw Drive Type | HEXAGON SOCKET |
| 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 |
|---|---|
| 121ADMA/WD | Electronic Hardware Corp Dba Electronic Hardware Corp (USA) |
| 125-1WD-2DG | Raytheon Company (USA) |
| 3C4B | Electronic Hardware Corp Dba Electronic Hardware Corp (USA) |
| 125-1WD-2DG | Raytheon Company Dba Raytheon Co (USA) |
| Reference | Meaning |
|---|---|
| MS91528-3C4B | 5/9 Secondary reference U.S. Government activity |
| MS91528-3C4B | 3/2 Design control — primary reference U.S. Government activity |
| NASM3926 | 3/1 Design control — primary reference U.S. Government activity |
| 12L4RWD | 5/9 Secondary reference Electronic Hardware Corp Dba Electronic Hardware Corp |
| 121ADMA/WD | 5/2 Secondary reference U.S. Government activity |
| 125-1WD-2DG | 5/9 Secondary reference Raytheon Company Div Corp |
NSN 5355-00-144-7093 is a Knob, manufactured by Electronic Hardware Corp Dba Electronic Hardware Corp, classified under FSC 5355, Knobs and Pointers. Status: active.
NSN 5355-00-144-7093 has 4 manufacturer part numbers on file: 121ADMA/WD (Electronic Hardware Corp Dba Electronic Hardware Corp), 125-1WD-2DG (Raytheon Company), 3C4B (Electronic Hardware Corp Dba Electronic Hardware Corp), 125-1WD-2DG (Raytheon Company Dba Raytheon Co).
Key specifications for 121ADMA/WD: Distance From Hole Center to Knob/skirt Base: 0.260 INCHES MAXIMUM IN; Inside Width: 0.222 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN; Shaft Accommodation Style: FLATTED ONE SIDE; Overall Thickness: 0.670 INCHES MINIMUM AND 0.730 INCHES MAXIMUM IN. 15 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.