The Valve,y, cataloged under National Stock Number 4820-00-596-3645, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Babcock & Wilcox Co. Government technical data includes 12 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-596-3645 |
| Primary Part Number | 117491EPC4 |
| Item Name | Valve,y |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Babcock & Wilcox Co |
| Status | ACTIVE |
| Flow Control Device | STEM |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | STRAIGHT THRU Y-PATTERN |
| Bonnet Type | PACKING RETAINING |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 1.062 INCHES ALL ENDS IN |
| Thread Class | 3A ALL ENDS A |
| Thread Quantity Per Inch | 10 ALL ENDS |
| Material | STEEL OVERALL |
| Thread Series Designator | UNS 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 |
|---|---|
| 117491EPC4 | Babcock & Wilcox Co (USA) |
| Reference | Meaning |
|---|---|
| 7800158 | C/1 Advisory reference — outside the item-of-supply concept Babcock & Wilcox Co |
| 51434B | 5/9 Secondary reference Babcock & Wilcox Co |
| 7800158 | 3/9 Design control — primary reference The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company |
| 51434B | C/1 Advisory reference — outside the item-of-supply concept The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company |
NSN 4820-00-596-3645 is a Valve,y, manufactured by Babcock & Wilcox Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-596-3645 has 1 manufacturer part number on file: 117491EPC4 (Babcock & Wilcox Co).
1 possible match (shared part number, not a government interchangeability claim): 5365-01-347-7158. Verify interchangeability with system specifications before substitution.
Key specifications for 117491EPC4: Flow Control Device: STEM; Connection Style: PLAIN (TUBE) ALL ENDS; Connection Type: THREADED EXTERNAL TUBE ALL ENDS; Style Designator: STRAIGHT THRU Y-PATTERN. 12 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.