The Ball,valve,ported, cataloged under National Stock Number 4820-01-438-4539, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-438-4539 |
| Item Name | Ball,valve,ported |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Port Diameter | 1.500 INCHES NOMINAL IN |
| Port Configuration | STRAIGHT |
| Stem Accommodation Quantity | 1 |
| Port Quantity | 1 |
| Material Document and Classification | ASTM B-164 ALLOY 400 ASSN STD SINGLE MATERIAL RESPONSE |
| Material | NICKEL ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SPM-16-2BE | 3/2 Design control — primary reference U.S. Government activity |
| SPN-16-SB2 SP16-90233B ITEM 2 | 5/2 Secondary reference U.S. Government activity |
| SPN-16-SB2 SP16-90233A | D/9 Drawing number reference only U.S. Government activity |
| SPN-16-2BE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4820-01-438-4539 is a Ball,valve,ported, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-438-4558. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-438-4539: Port Diameter: 1.500 INCHES NOMINAL IN; Port Configuration: STRAIGHT; Stem Accommodation Quantity: 1; Port Quantity: 1. 6 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.