Seat, Valve4820-01-250-8596

NSN 4820-01-250-8596 · NIIN 012508596 · Part number 639628

The Walworth Company · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 63686

Government record, cited

NSN 4820-01-250-8596 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-250-8596. Manufacturer of record part number: 639628.

Also searched as 4820-01-250-8596 · 4820012508596 · NIIN 012508596 · 01-250-8596 · FSC 4820 Valves, Nonpowered · CAGE 63686 · 639628

Nearby stock numbers ← 4820-01-250-8595 Seat, Valve · 4820-01-250-8597 Valve, Regulating, Fluid Pressure →

4820-01-250-8596 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Material: STEEL SEAT
1 manufacturer part number on file
Manufacturer of record: The Walworth Company

Identification

NSN: 4820-01-250-8596
NIIN: 012508596
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 639628
Manufacturer: The Walworth Company

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-250-8596, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Walworth Company. 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. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-250-8596
Primary Part Number	639628
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	The Walworth Company
Status	ACTIVE
Material	STEEL SEAT

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
639628 PRIMARY	The Walworth 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 4820-01-250-8596?

NSN 4820-01-250-8596 is a Seat,valve, manufactured by The Walworth Company, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-250-8596?

NSN 4820-01-250-8596 has 1 manufacturer part number on file: 639628 (The Walworth Company).

What are the specifications of 639628?

Key specifications for 639628: Material: STEEL SEAT. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-250-8596 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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