The Washer,saddle, cataloged under National Stock Number 5310-00-678-5451, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Textron Systems Corporation Dba Textron Systems Corp. Government technical data includes 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-678-5451 |
| Primary Part Number | 204-050-139-1 |
| Item Name | Washer,saddle |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Textron Systems Corporation Dba Textron Systems Corp |
| Status | ACTIVE |
| Material Document and Classification | QQ-A-268,T4,/CANCELLED/ FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.375 INCHES NOMINAL IN |
| Thickness at Bolt Hole | 0.100 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Hole Diameter | 0.440 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 |
|---|---|
| 204-050-139-1 | Textron Systems Corporation Dba Textron Systems Corp (USA) |
| Reference | Meaning |
|---|---|
| 204-050-139-1 | 5/9 Secondary reference U.S. Government activity |
| 204-050-139-1-18436 | 5/9 Secondary reference Metal Forming and Fabrication Inc |
| 204-050-139-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-678-5451 is a Washer,saddle, manufactured by Textron Systems Corporation Dba Textron Systems Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-678-5451 has 1 manufacturer part number on file: 204-050-139-1 (Textron Systems Corporation Dba Textron Systems Corp).
Key specifications for 204-050-139-1: Material Document and Classification: QQ-A-268,T4,/CANCELLED/ FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.375 INCHES NOMINAL IN; Thickness at Bolt Hole: 0.100 INCHES NOMINAL IN; Material: ALUMINUM ALLOY 2024 OVERALL. 5 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.