The Washer,flat, cataloged under National Stock Number 5310-01-351-3532, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Aqua-Chem, Inc. Dba Aqua-Chem Inc. Government technical data includes 7 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-351-3532 |
| Primary Part Number | 120-02304 0.500 REG |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Aqua-Chem, Inc. Dba Aqua-Chem Inc |
| Status | ACTIVE |
| Overall Diameter | 1.243 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.526 INCHES MINIMUM AND 0.546 INCHES MAXIMUM IN |
| Thickness | 0.090 INCHES MINIMUM AND 0.112 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 |
|---|---|
| 120-02304 0.500 REG PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| Reference | Meaning |
|---|---|
| 120-02304 | 5/9 Secondary reference Aqua-Chem, Inc. |
| 5714-500R-100 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 13229E0037-17 | 5/2 Secondary reference U.S. Government activity |
| 120-02304 0.500 REG | 3/9 Design control — primary reference Aqua-Chem, Inc. |
| 88115999 | C/1 Advisory reference — outside the item-of-supply concept Aeronautical and Support Equipment Type/asetds/aflcmc/ezsc |
NSN 5310-01-351-3532 is a Washer,flat, manufactured by Aqua-Chem, Inc. Dba Aqua-Chem Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-351-3532 has 1 manufacturer part number on file: 120-02304 0.500 REG (Aqua-Chem, Inc. Dba Aqua-Chem Inc).
1 possible match (shared part number, not a government interchangeability claim): 6150-01-650-4629. Verify interchangeability with system specifications before substitution.
Key specifications for 120-02304 0.500 REG: Overall Diameter: 1.243 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: COPPER ALLOY OVERALL. 7 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.