The Knob, cataloged under National Stock Number 5355-00-321-4678, is classified within Federal Supply Class 5355 (Knobs and Pointers) of the Hardware and Abrasives group. The manufacturer of record is Honeywell Limited Dba Honeywell Aerospace Toronto Div Aerospace-Toronto. Government technical data includes 15 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5355-00-321-4678 |
| Primary Part Number | 623172-1 |
| Item Name | Knob |
| FSC / FSG | 5355 / 53 — Knobs and Pointers |
| Manufacturer | Honeywell Limited Dba Honeywell Aerospace Toronto Div Aerospace-Toronto |
| Status | ACTIVE |
| Distance From Hole Center to Knob/skirt Base | 0.310 INCHES NOMINAL IN |
| Shaft Accommodation Style | ROUND |
| Overall Thickness | 0.750 INCHES NOMINAL IN |
| Style Designator | ROUND WITH BAR FACE |
| Outside Diameter | 0.880 INCHES NOMINAL IN |
| Reference Marking | ARROW |
| 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 | SMOOTH |
| Color | GRAY, DARK GULL |
| 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 |
|---|---|
| 623172-1 | Honeywell Limited Dba Honeywell Aerospace Toronto Div Aerospace-Toronto (CAN) |
| Reference | Meaning |
|---|---|
| 533-158-13 | 3/2 Design control — primary reference U.S. Government activity |
| 533-158-13 | 5/9 Secondary reference Dupree Inc Aerospace Knob Co Div |
| ST5M1253-302A | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 5355-00-321-4678 is a Knob, manufactured by Honeywell Limited Dba Honeywell Aerospace Toronto Div Aerospace-Toronto, classified under FSC 5355, Knobs and Pointers. Status: active.
NSN 5355-00-321-4678 has 1 manufacturer part number on file: 623172-1 (Honeywell Limited Dba Honeywell Aerospace Toronto Div Aerospace-Toronto).
1 possible match (shared part number, not a government interchangeability claim): 1710-01-703-2148. Verify interchangeability with system specifications before substitution.
Key specifications for 623172-1: Distance From Hole Center to Knob/skirt Base: 0.310 INCHES NOMINAL IN; Shaft Accommodation Style: ROUND; Overall Thickness: 0.750 INCHES NOMINAL IN; Style Designator: ROUND WITH BAR FACE. 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.