NSN 4820-01-539-6491 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-539-6491. Manufacturer of record part number: 31-BSK-B-RK.
Also searched as4820-01-539-6491 ·
4820015396491 ·
NIIN 015396491 ·
01-539-6491 ·
FSC 4820 Valves, Nonpowered · CAGE 79227 · 31-BSK-B-RK
The Parts Kit,ball Valve, cataloged under National Stock Number 4820-01-539-6491, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 2 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. Current acquisition status: Active.
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
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4820-00-001-0021 · Item name not on file
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4820-00-001-1230 · Item name not on file
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Frequently Asked Questions
What is NSN 4820-01-539-6491?
NSN 4820-01-539-6491 is a Parts Kit,ball Valve, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-539-6491?
NSN 4820-01-539-6491 has 1 manufacturer part number on file: 31-BSK-B-RK (Watts Regulator Company).
What are the specifications of 31-BSK-B-RK?
Key specifications for 31-BSK-B-RK: Component Quantity: 2; Furnished Items: 1 EA. BALL; 1 EA. STEM; Part Name Assigned by Controlling Agency: 2 INCH BALL VALVE PARTS KIT IN. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-539-6491 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.