The Washer,flat, cataloged under National Stock Number 5310-01-563-4841, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-563-4841 |
| Primary Part Number | 15985N18 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Material | SILICON BODY |
| 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 |
|---|---|
| 15985N18 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| PL 15990N18 IT NO. 778 | 5/1 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| 1.5X1X4IMP778X1 | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| 31.5X1X4IMP778X1 | 3/9 Design control — primary reference Curtiss-Wright Electro-Mechanical Corporation Div Epd |
NSN 5310-01-563-4841 is a Washer,flat, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-563-4841 has 1 manufacturer part number on file: 15985N18 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 15985N18: Special Features: MATERIAL:SILICON CARBIDE; Part Name Assigned by Controlling Agency: (INAVY)THRUST WASHER; End Item Identification: PUMP CTFGL 1.5X1X4 IMP 60GPM; Material: SILICON BODY. 1 specification is 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.