The Valve,ball, cataloged under National Stock Number 4820-01-539-7473, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-539-7473 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 HANDLE AND 1 LOCKING DEVICE |
| Renewable Seat Ring Type | PRESSED-IN |
| Nominal Pipe Size Accommodated | 0.250 INCHES ALL ENDS IN |
| Connection Style | SOCKET ALL ENDS |
| Minimum Operating Temp | 0.0 FAHRENHEIT DEGF |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | MIL-B-24059 MIL SPEC SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | MIL-P-5516 CL B MIL SPEC SINGLE MATERIAL RESPONSE PACKING |
| Material Document and Classification | QQ-S-763 CL 304 COND A FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | STR CRES MFR REF SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ZYTEL 45 HSB AS MANUFACTURED BY DUPONT OF WILMINGTON, DE. MFR REF SINGLE MATERIAL RESPONSE OR NYLATRON GSVQ AS MANUFACTURED BY QUADRANT ENGINEERING OF READING, PA. MFR REF SINGLE MATERIAL RESPONSE SEAT |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Bonnet Type | PACKING RETAINING |
| Maximum Operating Temp | 180.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | OIL, HYDRAULIC SINGLE RESPONSE |
| Material | NICKEL ALLOY STEM |
| Material | STEEL COMP 304 FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING BODY |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING |
| Material | PLASTIC POLYHEXAMETHYLENE ADIPAMIDE SEAT |
| Valve Operation Method | MANUAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 845-4558738 ASSY AP, LKG DV A-B | 3/2 Design control — primary reference U.S. Government activity |
| 4558738 | D/9 Drawing number reference only U.S. Government activity |
| ER2642-785-01G2 | D/9 Drawing number reference only U.S. Government activity |
| 2642-785-01 ASSY AP, LKG DV A-B | 5/2 Secondary reference U.S. Government activity |
| 4558739 | D/9 Drawing number reference only U.S. Government activity |
| ER2642-785-01G3 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-539-7473 is a Valve,ball, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-629-0785, 4820-01-735-6298. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-539-7473: Furnished Items and Quantity: 1 HANDLE AND 1 LOCKING DEVICE; Renewable Seat Ring Type: PRESSED-IN; Nominal Pipe Size Accommodated: 0.250 INCHES ALL ENDS IN; Connection Style: SOCKET ALL ENDS. 22 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.
NSN 4820-01-539-7473 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.