The Spacer,sleeve, cataloged under National Stock Number 5365-00-003-0591, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5365-00-003-0591 |
| Primary Part Number | PLA51M42535 |
| Item Name | Spacer,sleeve |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Corner Shape | SQUARE ALL CORNERS |
| Surface Treatment Document and Classification | QQ-C-320 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Outside Diameter | 0.3732 INCHES MINIMUM AND 0.3742 INCHES MAXIMUM IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | SOLID, PLAIN, NO OUTSIDE FLANGES |
| Body Inside Diameter | 0.2570 INCHES MINIMUM AND 0.2620 INCHES MAXIMUM IN |
| Surface Treatment | CHROMIUM OVERALL |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
|---|---|
| EMS73168 | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| PLA51M42535 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51M42535-11 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51M42535-11 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
NSN 5365-00-003-0591 is a Spacer,sleeve, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
NSN 5365-00-003-0591 has 2 manufacturer part numbers on file: EMS73168 (Allison Transmission Inc Dba Allison Transmission, Inc), PLA51M42535 (Northrop Grumman Systems Corporation).
Key specifications for PLA51M42535: Corner Shape: SQUARE ALL CORNERS; Surface Treatment Document and Classification: QQ-C-320 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Body Outside Diameter: 0.3732 INCHES MINIMUM AND 0.3742 INCHES MAXIMUM IN; Hardness Rating: 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL. 8 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.