The Washer,recessed, cataloged under National Stock Number 5310-01-309-8816, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-309-8816 |
| Primary Part Number | 6242863-6 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-81751,TYPE 1,CLASS 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | RECESSED |
| Material Document and Classification | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.000 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Recess Depth | 0.062 INCHES NOMINAL IN |
| Material Thickness | 0.071 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN |
| Recess Diameter | 0.622 INCHES MINIMUM AND 0.632 INCHES MAXIMUM IN |
| Color | GRAY/GREY OVERALL |
| Material | STEEL COMP 4130 OVERALL |
| Hole Diameter | 0.501 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Recess Angle | 90.0 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 |
|---|---|
| 6242863-6 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 2995343 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 5310-01-309-8816 is a Washer,recessed, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-309-8816 has 1 manufacturer part number on file: 6242863-6 (Naval Sea Systems Command).
Key specifications for 6242863-6: Surface Treatment Document and Classification: MIL-C-81751,TYPE 1,CLASS 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: RECESSED; Material Document and Classification: MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.000 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN. 11 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.