NSN 4820-01-641-1731 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-641-1731. Manufacturer of record part number: RK289T3/8-1/2IN-0887179.
Nearby stock numbers← 4820-01-641-1572 Parts Kit, Check Valve
·
4820-01-641-1842 Valve, Auto Std →
4820-01-641-1731 — Valves, Nonpowered
Features
Repair Kit,valve — FSC 4820
2 manufacturer part numbers on file
Manufacturer of record: Watts Regulator Company
Identification
NSN: 4820-01-641-1731
NIIN: 016411731
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: RK289T3/8-1/2IN-0887179
Manufacturer: Watts Regulator Company
General Description
The Repair Kit,valve, cataloged under National Stock Number 4820-01-641-1731, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 4820-01-641-1731?
NSN 4820-01-641-1731 is a Repair Kit,valve, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-641-1731?
NSN 4820-01-641-1731 has 2 manufacturer part numbers on file: LF289 (Watts Regulator Company), RK289T3/8-1/2IN-0887179 (Watts Regulator Company).
What are the specifications of RK289T3/8-1/2IN-0887179?
Key specifications for RK289T3/8-1/2IN-0887179: Part Name Assigned by Controlling Agency: LF SPILL RESISTANT ATOMSPHERIC VACUUM BREAKERS. 0 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-641-1731 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.