The Washer,flat, cataloged under National Stock Number 5310-01-478-8564, 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 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-478-8564 |
| Primary Part Number | HS306-209L |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Overall Diameter | 0.380 INCHES MINIMUM AND 0.400 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-5059,CRES 301 ASSN STD 3RD MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 301 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Thickness | 0.016 INCHES NOMINAL 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 |
|---|---|
| HS306-209L PRIMARY | The Boeing Company (USA) |
| HS306-209L | Moeller Manufacturing & Supply, Llc (USA) |
NSN 5310-01-478-8564 is a Washer,flat, manufactured by The Boeing Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-478-8564 has 2 manufacturer part numbers on file: HS306-209L (The Boeing Company), HS306-209L (Moeller Manufacturing & Supply, Llc).
Key specifications for HS306-209L: Overall Diameter: 0.380 INCHES MINIMUM AND 0.400 INCHES MAXIMUM IN; Material Document and Classification: MIL-S-5059,CRES 301 ASSN STD 3RD MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 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.