The Valve,ball, cataloged under National Stock Number 4820-01-485-9401, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Willard Marine, Inc.. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-485-9401 |
| Primary Part Number | 13MPE-501-017 PC 2 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Willard Marine, Inc. |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 HANDLE |
| Renewable Seat Ring Type | PRESSED-IN |
| Nominal Pipe Size Accommodated | 0.750 INCHES ALL ENDS IN |
| Connection Style | PLAIN,OPTIONAL END(PIPE) ALL ENDS |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | ASTM B276 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 600.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Maximum Operating Temp | 400.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Bonnet Attachment Method | INTEGRAL |
| Thread Class | 2B ALL ENDS |
| Thread Quantity Per Inch | 14 ALL ENDS |
| Material | COPPER ALLOY 377 OVERALL |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE SEAT |
| Material | COPPER ALLOY 377 FLOW CONTROL DEVICE |
| Thread Series Designator | NPTF ALL ENDS |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 13MPE-501-017 PC 2 | Willard Marine, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 13MPE-501-017 | D/9 Drawing number reference only Willard Marine, Inc. |
| V500P-12-02 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-485-9401 is a Valve,ball, manufactured by Willard Marine, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-485-9401 has 1 manufacturer part number on file: 13MPE-501-017 PC 2 (Willard Marine, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-485-9870. Verify interchangeability with system specifications before substitution.
Key specifications for 13MPE-501-017 PC 2: Furnished Items and Quantity: 1 HANDLE; Renewable Seat Ring Type: PRESSED-IN; Nominal Pipe Size Accommodated: 0.750 INCHES ALL ENDS IN; Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS. 19 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.