The Washer,flat, cataloged under National Stock Number 5310-01-609-9552, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corp. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-609-9552 |
| Primary Part Number | SK61889-1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corp |
| Status | ACTIVE |
| 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 |
|---|---|
| SK61889-1 PRIMARY | Rtx Corp (USA) |
| Reference | Meaning |
|---|---|
| SK61889-1 | 5/9 Secondary reference Hamilton Sundstrand Corporation Dba Collins Aerospace |
| 201425824 | 3/2 Design control — primary reference U.S. Government activity |
| SK61889-01 | 5/9 Secondary reference Rtx Corp |
| SK61889-1 | 5/9 Secondary reference U.S. Government activity |
| SK61889-01 | 5/9 Secondary reference Hamilton Sundstrand Corporation Dba Collins Aerospace |
NSN 5310-01-609-9552 is a Washer,flat, manufactured by Rtx Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-609-9552 has 1 manufacturer part number on file: SK61889-1 (Rtx Corp).
Key specifications for SK61889-1: Part Name Assigned by Controlling Agency: WASHER, PUMP HOUSING FRONT COVER PLATE; End Item Identification: C130 AIRCRAFT. 0 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.