The Indicator,valve Opening, cataloged under National Stock Number 4820-01-291-5787, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ruggles-Klingemann Mfg Co Dba the Ruggles-Klingemann Company. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-291-5787 |
| Primary Part Number | 3S-5271-13 PART 63 2IN |
| Item Name | Indicator,valve Opening |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ruggles-Klingemann Mfg Co Dba the Ruggles-Klingemann Company |
| Status | ACTIVE |
| Material | STEEL CASE |
| 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 |
|---|---|
| 3S-5271-13 PART 63 2IN PRIMARY | Ruggles-Klingemann Mfg Co Dba the Ruggles-Klingemann Company (USA) |
| Reference | Meaning |
|---|---|
| 3S-5271-13 | D/9 Drawing number reference only Ruggles-Klingemann Mfg Co Dba the Ruggles-Klingemann Company |
NSN 4820-01-291-5787 is a Indicator,valve Opening, manufactured by Ruggles-Klingemann Mfg Co Dba the Ruggles-Klingemann Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-291-5787 has 1 manufacturer part number on file: 3S-5271-13 PART 63 2IN (Ruggles-Klingemann Mfg Co Dba the Ruggles-Klingemann Company).
Key specifications for 3S-5271-13 PART 63 2IN: End Item Identification: 4820-01-199-1151; Material: STEEL CASE. 1 specification is 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.