The Knob, cataloged under National Stock Number 5355-01-079-2923, 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 20 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5355-01-079-2923 |
| Primary Part Number | I1B4MA |
| 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 | 0.484 INCHES NOMINAL IN |
| Shaft Accommodation Style | COUNTERBORED |
| Overall Thickness | 1.027 INCHES NOMINAL IN |
| Skirt Outside Diameter | 0.826 INCHES NOMINAL IN |
| Material Transparency | OPAQUE |
| Style Designator | ROUND |
| Outside Diameter | 0.911 INCHES NOMINAL IN |
| Counterbore Depth | 0.260 INCHES NOMINAL IN |
| Reference Marking | PUSH TO TURN |
| Setscrew Hole Quantity | 2 |
| Nominal Thread Size | 0.164 INCHES SCREW HOLE IN |
| Counterbore Diameter | 0.654 INCHES NOMINAL IN |
| Inside Diameter | 0.252 INCHES NOMINAL IN |
| Gripping Surface Condition | GRIP AID |
| Skirt Design | NONDETACHABLE |
| Screw Drive Type | HEXAGON SOCKET |
| Thread Quantity Per Inch | 32 SCREW HOLE |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SCREW HOLE |
| Skirt Style | RING |
| 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 |
|---|---|
| 12273391 | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
| I1B4MA PRIMARY | Electronic Hardware Corp Dba Electronic Hardware Corp (USA) |
| 12273391 | Exotic Rubber & Plastics Corp Dba Exotic Rubber & Plastics, Corp (USA) |
| Reference | Meaning |
|---|---|
| I1B4MA | 5/9 Secondary reference U.S. Government activity |
| 5355PL2194919 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5355010792923 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 5355-01-079-2923 is a Knob, manufactured by Electronic Hardware Corp Dba Electronic Hardware Corp, classified under FSC 5355, Knobs and Pointers. Status: active.
NSN 5355-01-079-2923 has 3 manufacturer part numbers on file: 12273391 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate), I1B4MA (Electronic Hardware Corp Dba Electronic Hardware Corp), 12273391 (Exotic Rubber & Plastics Corp Dba Exotic Rubber & Plastics, Corp).
1 possible match (shared part number, not a government interchangeability claim): 5355-01-628-3550. Verify interchangeability with system specifications before substitution.
Key specifications for I1B4MA: Distance From Hole Center to Knob/skirt Base: 0.484 INCHES NOMINAL IN; Shaft Accommodation Style: COUNTERBORED; Overall Thickness: 1.027 INCHES NOMINAL IN; Skirt Outside Diameter: 0.826 INCHES NOMINAL IN. 20 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.