NSN 4820-01-557-8494 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-557-8494. Manufacturer of record part number: H71243-02-3-1.
Manufacturer of record: Defense Maritime Solutions, Inc.
Identification
NSN: 4820-01-557-8494
NIIN: 015578494
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: H71243-02-3-1
Manufacturer: Defense Maritime Solutions, Inc.
General Description
The Cap,valve, cataloged under National Stock Number 4820-01-557-8494, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Defense Maritime Solutions, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
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 4820-01-557-8494?
NSN 4820-01-557-8494 is a Cap,valve, manufactured by Defense Maritime Solutions, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-557-8494?
NSN 4820-01-557-8494 has 1 manufacturer part number on file: H71243-02-3-1 (Defense Maritime Solutions, Inc.).
What are the specifications of H71243-02-3-1?
Key specifications for H71243-02-3-1: Special Features: NHA: GA FOR 20.125 DIA. SHAFT TYPE ND BULKHEAD SEAL; End Item Identification: NEW CONSTRUCTION DDG102; Material: COPPER ALLOY. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-557-8494 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.