The Washer,recessed, cataloged under National Stock Number 5310-00-209-3528, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-209-3528 |
| Primary Part Number | S1565-61675 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Material Document and Classification | MIL-S-6758 COND C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN |
| Material Thickness | 0.077 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN |
| Recess Diameter | 0.396 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 4130 OVERALL |
| Hole Diameter | 0.316 INCHES MINIMUM AND 0.320 INCHES MAXIMUM 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 |
|---|---|
| S1565-61675 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 5310-00-209-3528 is a Washer,recessed, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-209-3528 has 1 manufacturer part number on file: S1565-61675 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S1565-61675: Style Designator: RECESSED; Material Document and Classification: MIL-S-6758 COND C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN; Material Thickness: 0.077 INCHES MINIMUM AND 0.079 INCHES MAXIMUM 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.