The Washer,recessed, cataloged under National Stock Number 5310-00-209-1609, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Meggitt Aircraft Braking Systems Corporation. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-209-1609 |
| Primary Part Number | 9521948 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Meggitt Aircraft Braking Systems Corporation |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Material Document and Classification | MIL-S-6758,COND F4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.656 INCHES NOMINAL IN |
| Material Thickness | 0.156 INCHES NOMINAL IN |
| Recess Diameter | 0.401 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 4130 OVERALL |
| Hole Diameter | 0.319 INCHES NOMINAL IN |
| Recess Angle | 45.0 DEGREES NOMINAL |
| 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 |
|---|---|
| 9521948 PRIMARY | Meggitt Aircraft Braking Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 9521948 | 5/9 Secondary reference Goodyear Tire and Rubber Co the |
NSN 5310-00-209-1609 is a Washer,recessed, manufactured by Meggitt Aircraft Braking Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-209-1609 has 1 manufacturer part number on file: 9521948 (Meggitt Aircraft Braking Systems Corporation).
Key specifications for 9521948: Style Designator: RECESSED; Material Document and Classification: MIL-S-6758,COND F4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.656 INCHES NOMINAL IN; Material Thickness: 0.156 INCHES NOMINAL IN. 9 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.