The Washer,recessed, cataloged under National Stock Number 5310-01-256-5233, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rockwell Collins, Inc. Dba Rc Displays Systems. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-256-5233 |
| Primary Part Number | PC92056-1 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rockwell Collins, Inc. Dba Rc Displays Systems |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Outside Diameter | 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN |
| Material Thickness | 0.022 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN |
| Recess Diameter | 0.222 INCHES MINIMUM AND 0.242 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Hole Diameter | 0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN |
| Recess Angle | 98.0 DEGREES MINIMUM AND 102.0 DEGREES MAXIMUM |
| 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 |
|---|---|
| PC92056-1 PRIMARY | Rockwell Collins, Inc. Dba Rc Displays Systems (USA) |
| 8907807-1 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
| Reference | Meaning |
|---|---|
| 10110226 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 5728-1 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-256-5233 is a Washer,recessed, manufactured by Rockwell Collins, Inc. Dba Rc Displays Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-256-5233 has 2 manufacturer part numbers on file: PC92056-1 (Rockwell Collins, Inc. Dba Rc Displays Systems), 8907807-1 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp).
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-414-4210, 5310-01-550-8455. Verify interchangeability with system specifications before substitution.
Key specifications for PC92056-1: Style Designator: RECESSED; Outside Diameter: 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN; Material Thickness: 0.022 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN; Recess Diameter: 0.222 INCHES MINIMUM AND 0.242 INCHES MAXIMUM IN. 7 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.