Parts Kit, Valve Assembly4820-01-558-3528

NSN 4820-01-558-3528 · NIIN 015583528 · Part number 0887750 RK909RT 2.50IN

Watts Regulator Company · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 79227

Government record, cited

NSN 4820-01-558-3528 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-558-3528. Manufacturer of record part number: 0887750 RK909RT 2.50IN.

Also searched as 4820-01-558-3528 · 4820015583528 · NIIN 015583528 · 01-558-3528 · FSC 4820 Valves, Nonpowered · CAGE 79227 · 0887750 RK909RT 2.50IN · 0887750 2.50IN · RK909 RT 2.50IN

Nearby stock numbers ← 4820-01-558-3449 Parts Kit, Check Valve · 4820-01-558-3576 Guide, Valve Stem →

4820-01-558-3528 — Valves, Nonpowered

Features

Parts Kit,valve Assembly — FSC 4820
3 manufacturer part numbers on file
Manufacturer of record: Watts Regulator Company

Identification

NSN: 4820-01-558-3528
NIIN: 015583528
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 0887750 RK909RT 2.50IN
Manufacturer: Watts Regulator Company

General Description

The Parts Kit,valve Assembly, cataloged under National Stock Number 4820-01-558-3528, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-558-3528
Primary Part Number	0887750 RK909RT 2.50IN
Item Name	Parts Kit,valve Assembly
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Watts Regulator Company
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
0887750 2.50IN	Watts Regulator Company (USA)
RK909 RT 2.50IN	Watts Regulator Company (USA)
0887750 RK909RT 2.50IN PRIMARY	Watts Regulator Company (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 4820-01-558-3528?

NSN 4820-01-558-3528 is a Parts Kit,valve Assembly, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-558-3528?

NSN 4820-01-558-3528 has 3 manufacturer part numbers on file: 0887750 2.50IN (Watts Regulator Company), RK909 RT 2.50IN (Watts Regulator Company), 0887750 RK909RT 2.50IN (Watts Regulator Company).

What are the specifications of 0887750 RK909RT 2.50IN?

Key specifications for 0887750 RK909RT 2.50IN: Special Features: CHECK DISK, COVER O-RING, SLEEVE O-RING, PISTON O-RING, RELIEF VALVE DISK ASSY, DIAPHRAGM, PISTON SEAL, LUBRICANT; Part Name Assigned by Controlling Agency: COMPLETE RUBBER PARTS KIT; End Item Identification: 4820-01-558-3416; OVERHAUL/AVAILABILITY LHD3. 0 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-558-3528 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.

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