The Washer,recessed, cataloged under National Stock Number 5310-00-944-2603, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Plessey Aerospace Usa Div of Plessey Trading Corp Plessey Inc. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-944-2603 |
| Primary Part Number | 61-1781 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Plessey Aerospace Usa Div of Plessey Trading Corp Plessey Inc |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Outside Diameter | 0.750 INCHES NOMINAL IN |
| Recess Depth | 0.023 INCHES MINIMUM AND 0.026 INCHES MAXIMUM IN |
| Recess Diameter | 0.590 INCHES MINIMUM AND 0.595 INCHES MAXIMUM IN |
| Material | STEEL COMP 303 OVERALL |
| Hole Diameter | 0.377 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 61-1781 PRIMARY | Plessey Aerospace Usa Div of Plessey Trading Corp Plessey Inc (USA) |
| Reference | Meaning |
|---|---|
| 61-1781 | 5/9 Secondary reference Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash |
NSN 5310-00-944-2603 is a Washer,recessed, manufactured by Plessey Aerospace Usa Div of Plessey Trading Corp Plessey Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-944-2603 has 1 manufacturer part number on file: 61-1781 (Plessey Aerospace Usa Div of Plessey Trading Corp Plessey Inc).
Key specifications for 61-1781: Overall Height: 0.082 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN; Style Designator: RECESSED; Outside Diameter: 0.750 INCHES NOMINAL IN; Recess Depth: 0.023 INCHES MINIMUM AND 0.026 INCHES MAXIMUM IN. 6 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.