The Washer,flat, cataloged under National Stock Number 5310-01-448-8709, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Tolo Incorporated Dba Bfgoodrich Aerospace, Tolo Division. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-448-8709 |
| Primary Part Number | KC49521-1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Tolo Incorporated Dba Bfgoodrich Aerospace, Tolo Division |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.349 INCHES MINIMUM AND 0.357 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-A-225 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Surface Treatment | CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.211 INCHES MINIMUM AND 0.215 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 |
|---|---|
| KC49521-1 PRIMARY | Tolo Incorporated Dba Bfgoodrich Aerospace, Tolo Division (USA) |
NSN 5310-01-448-8709 is a Washer,flat, manufactured by Tolo Incorporated Dba Bfgoodrich Aerospace, Tolo Division, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-448-8709 has 1 manufacturer part number on file: KC49521-1 (Tolo Incorporated Dba Bfgoodrich Aerospace, Tolo Division).
Key specifications for KC49521-1: Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.349 INCHES MINIMUM AND 0.357 INCHES MAXIMUM IN; Material Document and Classification: QQ-A-225 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Surface Treatment: CHROMATE OVERALL. 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.