The Washer,flat, cataloged under National Stock Number 5310-01-615-2545, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 12 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 | 5310-01-615-2545 |
| Primary Part Number | HS4244C9 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416 TYPE 1 CLASS 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.958 INCHES MINIMUM AND 0.978 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | MIL-S-18729 MIL STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Inside Left Corner Chamfer Angle | 44.5 DEGREES MINIMUM AND 45.5 DEGREES MAXIMUM |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.564 INCHES MINIMUM AND 0.568 INCHES MAXIMUM IN |
| Thickness | 0.071 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN |
| 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 |
|---|---|
| HS4244C9 PRIMARY | The Boeing Company (USA) |
NSN 5310-01-615-2545 is a Washer,flat, manufactured by The Boeing Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-615-2545 has 1 manufacturer part number on file: HS4244C9 (The Boeing Company).
Key specifications for HS4244C9: Surface Treatment Document and Classification: QQ-P-416 TYPE 1 CLASS 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.958 INCHES MINIMUM AND 0.978 INCHES MAXIMUM IN; Hardness Rating: 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM; Material Document and Classification: MIL-S-18729 MIL STD SINGLE MATERIAL RESPONSE OVERALL. 12 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.