NSN 4820-01-347-0824 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-347-0824. Manufacturer of record part number: S-4.0-91-2-H.
Manufacturer of record: Core Industries Inc. Dba Mueller Steam Specialty
Identification
NSN: 4820-01-347-0824
NIIN: 013470824
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: S-4.0-91-2-H
Manufacturer: Core Industries Inc. Dba Mueller Steam Specialty
General Description
The Seat,valve, cataloged under National Stock Number 4820-01-347-0824, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Core Industries Inc. Dba Mueller Steam Specialty. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Core Industries Inc. Dba Mueller Steam Specialty (USA)
No interchangeability data on file.
Other items in FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-347-0824?
NSN 4820-01-347-0824 is a Seat,valve, manufactured by Core Industries Inc. Dba Mueller Steam Specialty, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-347-0824?
NSN 4820-01-347-0824 has 2 manufacturer part numbers on file: ACV-2880 ITEM 2 (Core Industries Inc. Dba Mueller Steam Specialty), S-4.0-91-2-H (Core Industries Inc. Dba Mueller Steam Specialty).
What are the specifications of S-4.0-91-2-H?
Key specifications for S-4.0-91-2-H: End Item Identification: CORE INDUSTRIES INC CHECK VALVE MODEL N0. 91AT,SIZE 4.000 IN. IN. 0 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-347-0824 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.