The Washer,flat, cataloged under National Stock Number 5310-01-488-2251, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Leonardo Spa Aeronautics Division - Pomigliano D'arco Site. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-488-2251 |
| Primary Part Number | NAS1149E0732R |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Leonardo Spa Aeronautics Division - Pomigliano D'arco Site |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 ASSN STD ALL TREATMENT RESPONSES OVERALL |
| Overall Diameter | 0.750 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5525 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Color | NATURAL OVERALL |
| Surface Treatment | PASSIVATE OVERALL |
| Environmental Protection | CORROSION RESISTANT |
| Peripheral Shape Style | ROUND |
| Material | STEEL CORROSION RESISTING OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.453 INCHES MAXIMUM IN |
| Thickness | 0.032 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 |
|---|---|
| NAS1149E0732R | Leonardo Spa Aeronautics Division - Pomigliano D'arco Site (ITA) |
| Reference | Meaning |
|---|---|
| NAS1149E0732R | 5/1 Secondary reference Moeller Manufacturing & Supply, Llc |
| NAS1149E0732R | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-488-2251 is a Washer,flat, manufactured by Leonardo Spa Aeronautics Division - Pomigliano D'arco Site, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-488-2251 has 1 manufacturer part number on file: NAS1149E0732R (Leonardo Spa Aeronautics Division - Pomigliano D'arco Site).
Key specifications for NAS1149E0732R: Surface Treatment Document and Classification: QQ-P-35 ASSN STD ALL TREATMENT RESPONSES OVERALL; Overall Diameter: 0.750 INCHES MAXIMUM IN; Material Document and Classification: AMS 5525 ASSN STD ALL MATERIAL RESPONSES OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.