The Pilot,valve, cataloged under National Stock Number 4820-01-145-0475, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Circor Pumps North America Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-145-0475 |
| Primary Part Number | S-315AC |
| Item Name | Pilot,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Circor Pumps North America Llc |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL |
| 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 |
|---|---|
| S-315AC PRIMARY | Circor Pumps North America Llc (USA) |
| SG-3883 PIECE19 | Circor Pumps North America Llc (USA) |
| Reference | Meaning |
|---|---|
| SG-3883 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG-3883 PIECE19 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG-3883 | D/9 Drawing number reference only Circor Pumps North America Llc |
| S-315AC | 5/9 Secondary reference Siemens Energy, Inc. |
NSN 4820-01-145-0475 is a Pilot,valve, manufactured by Circor Pumps North America Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-145-0475 has 2 manufacturer part numbers on file: S-315AC (Circor Pumps North America Llc), SG-3883 PIECE19 (Circor Pumps North America Llc).
Key specifications for S-315AC: General Characteristics Item Description: STEEL. 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.