The Washer,flat, cataloged under National Stock Number 5310-01-338-4121, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Aertekno S.r.l.. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-338-4121 |
| Primary Part Number | NAS1149CN432R |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Aertekno S.r.l. |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.307 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Specification/standard Data | 80205-NAS1149 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 316 OR STEEL COMP 321 OR STEEL COMP 347 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Thickness | 0.032 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 |
|---|---|
| NAS1149CN432R | Aertekno S.r.l. (ITA) |
| 21-0150 | Elp Gmbh European Logistic Partners (DEU) |
| 98017A610 | Mcmaster-Carr Supply Co (USA) |
| NAS1149CN432R | Leonardo Spa Aeronautics Division - Pomigliano D'arco Site (ITA) |
| ASNA2397C4 | Airbus Operations (FRA) |
| Reference | Meaning |
|---|---|
| NAS1149CN432R | 5/2 Secondary reference U.S. Government activity |
| NAS1149CN432R | 5/1 Secondary reference Raytheon Company |
| 10122211 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| NAS1149CN432R | 3/2 Design control — primary reference U.S. Government activity |
| 5310PL0198822 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5310-01-338-4121 is a Washer,flat, manufactured by Aertekno S.r.l., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-338-4121 has 5 manufacturer part numbers on file: NAS1149CN432R (Aertekno S.r.l.), 21-0150 (Elp Gmbh European Logistic Partners), 98017A610 (Mcmaster-Carr Supply Co), NAS1149CN432R (Leonardo Spa Aeronautics Division - Pomigliano D'arco Site), ASNA2397C4 (Airbus Operations).
1 possible match (shared part number, not a government interchangeability claim): 5910-01-384-2094. Verify interchangeability with system specifications before substitution.
Key specifications for NAS1149CN432R: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.307 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Specification/standard Data: 80205-NAS1149 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD. 10 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.