Valve, Check4820-01-483-3575

NSN 4820-01-483-3575 · NIIN 014833575 · Part number 426-4F4F-B

The Specialty Mfg. Co Dba Specialty Mfg. Co · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 56173

Government record, cited

NSN 4820-01-483-3575 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-483-3575. Manufacturer of record part number: 426-4F4F-B.

Also searched as 4820-01-483-3575 · 4820014833575 · NIIN 014833575 · 01-483-3575 · FSC 4820 Valves, Nonpowered · CAGE 56173 · 426-4F4F-B

Nearby stock numbers ← 4820-01-483-3502 Disk, Valve · 4820-01-483-4031 Disk, Valve →

4820-01-483-3575 — Valves, Nonpowered

Features

Valve,check — FSC 4820
Nominal Pipe Size Accommodated: 0.250 INCHES ALL ENDS IN
Connection Style: PLAIN BEVELED (PIPE) ALL ENDS
Nominal Length: 2.188 INCHES ALL ENDS IN
Mounting Position: HORIZONTAL OR VERTICAL
Connection Type: UNTHREADED EXTERNAL PIPE ALL ENDS
Style Designator: STRAIGHT THRU
Operating Pressure: 125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS

Identification

NSN: 4820-01-483-3575
NIIN: 014833575
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 426-4F4F-B
Manufacturer: The Specialty Mfg. Co Dba Specialty Mfg. Co

General Description

The Valve,check, cataloged under National Stock Number 4820-01-483-3575, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Specialty Mfg. Co Dba Specialty Mfg. Co. Government technical data includes 11 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.

Technical Specifications

Parameter	Value
NSN	4820-01-483-3575
Primary Part Number	426-4F4F-B
Item Name	Valve,check
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	The Specialty Mfg. Co Dba Specialty Mfg. Co
Status	ACTIVE
Nominal Pipe Size Accommodated	0.250 INCHES ALL ENDS IN
Connection Style	PLAIN BEVELED (PIPE) ALL ENDS
Nominal Length	2.188 INCHES ALL ENDS IN
Mounting Position	HORIZONTAL OR VERTICAL
Connection Type	UNTHREADED EXTERNAL PIPE ALL ENDS
Style Designator	STRAIGHT THRU
Operating Pressure	125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Maximum Operating Temp	140.0 FAHRENHEIT SINGLE RESPONSE DEGF
Nominal Outside Diameter	0.250 INCHES ALL ENDS IN
Material	PLASTIC POLYVINYL CHLORIDE (PVC) OVERALL
Valve Operation Method	AUTOMATIC

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
426-4F4F-B PRIMARY	The Specialty Mfg. Co Dba Specialty Mfg. Co (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 4820-01-483-3575?

NSN 4820-01-483-3575 is a Valve,check, manufactured by The Specialty Mfg. Co Dba Specialty Mfg. Co, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-483-3575?

NSN 4820-01-483-3575 has 1 manufacturer part number on file: 426-4F4F-B (The Specialty Mfg. Co Dba Specialty Mfg. Co).

What are the specifications of 426-4F4F-B?

Key specifications for 426-4F4F-B: Nominal Pipe Size Accommodated: 0.250 INCHES ALL ENDS IN; Connection Style: PLAIN BEVELED (PIPE) ALL ENDS; Nominal Length: 2.188 INCHES ALL ENDS IN; Mounting Position: HORIZONTAL OR VERTICAL. 11 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-483-3575 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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