The Washer,flat, cataloged under National Stock Number 5310-00-413-1894, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Illinois Tool Works Inc.. Government technical data includes 9 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 | 5310-00-413-1894 |
| Primary Part Number | 220-225 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Illinois Tool Works Inc. |
| Status | ACTIVE |
| Overall Diameter | 0.875 INCHES NOMINAL IN |
| Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | N0.1 TYPE 410 FLAPPER VALVE FSCM 71321 MFR REF SINGLE MATERIAL RESPONSE OR GRADE 19-7 FLAPPER VALVE FSCM 62109 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.406 INCHES NOMINAL IN |
| Thickness | 0.016 INCHES MINIMUM AND 0.018 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 |
|---|---|
| 220-225 PRIMARY | Illinois Tool Works Inc. (USA) |
NSN 5310-00-413-1894 is a Washer,flat, manufactured by Illinois Tool Works Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-413-1894 has 1 manufacturer part number on file: 220-225 (Illinois Tool Works Inc.).
Key specifications for 220-225: Overall Diameter: 0.875 INCHES NOMINAL IN; Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM; Material Document and Classification: N0.1 TYPE 410 FLAPPER VALVE FSCM 71321 MFR REF SINGLE MATERIAL RESPONSE OR GRADE 19-7 FLAPPER VALVE FSCM 62109 MFR REF SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 9 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.