The Washer,recessed, cataloged under National Stock Number 5310-01-131-7578, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-131-7578 |
| Primary Part Number | 4M247-16C |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Material Document and Classification | QQ-C-530,TEMPER AT FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.625 INCHES NOMINAL IN |
| Material Thickness | 0.078 INCHES NOMINAL IN |
| Recess Diameter | 1.140 INCHES MINIMUM AND 1.160 INCHES MAXIMUM IN |
| Material | COPPER ALLOY OVERALL |
| Hole Diameter | 1.010 INCHES MINIMUM AND 1.025 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 |
|---|---|
| 4M247-16C PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10109617 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5310-01-131-7578 is a Washer,recessed, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-131-7578 has 1 manufacturer part number on file: 4M247-16C (The Boeing Company Div Defense).
Key specifications for 4M247-16C: Style Designator: RECESSED; Material Document and Classification: QQ-C-530,TEMPER AT FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.625 INCHES NOMINAL IN; Material Thickness: 0.078 INCHES NOMINAL IN. 8 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.