PartsTable TECHNICAL DATA SHEET

NSN 4820-01-537-0640Government record, cited

Valve, Check4820-01-537-0640

NSN 4820-01-537-0640 · NIIN 015370640 · Part number 15051C-FF 2.50IN

Floworks Usa Lp Dba Flotech Div Jacksonville · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 62650

Government record, cited

NSN 4820-01-537-0640 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-537-0640. Manufacturer of record part number: 15051C-FF 2.50IN.

Also searched as 4820-01-537-0640 · 4820015370640 · NIIN 015370640 · 01-537-0640 · FSC 4820 Valves, Nonpowered · CAGE 62650 · 15051C-FF 2.50IN · 15051C-FF · 15051C-FF ASSY 15051C-FF 2.50IN

Nearby stock numbers ← 4820-01-537-0543 Disk, Valve · 4820-01-537-0649 Valve, Check →

4820-01-537-0640 — Valves, Nonpowered

Features

Valve,check — FSC 4820
2 manufacturer part numbers on file
Manufacturer of record: Floworks Usa Lp Dba Flotech Div Jacksonville

Identification

NSN: 4820-01-537-0640
NIIN: 015370640
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 15051C-FF 2.50IN
Manufacturer: Floworks Usa Lp Dba Flotech Div Jacksonville

General Description

The Valve,check, cataloged under National Stock Number 4820-01-537-0640, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Floworks Usa Lp Dba Flotech Div Jacksonville. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Catalog Facts

Item Name	Valve,check
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	Floworks Usa Lp Dba Flotech Div Jacksonville (CAGE 62650)

Technical Specifications

Parameter	Value
NSN	4820-01-537-0640
Primary Part Number	15051C-FF 2.50IN
Item Name	Valve,check
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Floworks Usa Lp Dba Flotech Div Jacksonville
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

⇄ Related Items 9

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

4820-01-537-065015051C-FF 2.50IN NO. 3 POSSIBLE MATCH

DISK,VALVE

Possible match (shared part number)Floworks Usa Lp Dba Flotech Div Jacksonville

4820-01-537-067615051C-FF 6.00IN NO. 3 POSSIBLE MATCH

DISK,VALVE

Possible match (shared part number)Floworks Usa Lp Dba Flotech Div Jacksonville

4820-01-537-072815051C-FF 8.00IN NO. 3 POSSIBLE MATCH

DISK,VALVE

Possible match (shared part number)Floworks Usa Lp Dba Flotech Div Jacksonville

4820-01-537-111915051C-FF 3.00IN NO. 3 POSSIBLE MATCH

DISK,VALVE

Possible match (shared part number)Floworks Usa Lp Dba Flotech Div Jacksonville

5330-01-537-437215051C-FF 6.00IN NO. 8 POSSIBLE MATCH

GASKET

Possible match (shared part number)Floworks Usa Lp Dba Flotech Div Jacksonville

5330-01-537-437815051C-FF 2.50IN NO. 8 POSSIBLE MATCH

GASKET

Possible match (shared part number)Floworks Usa Lp Dba Flotech Div Jacksonville

5330-01-537-438715051C-FF 3.00IN NO. 8 POSSIBLE MATCH

GASKET

Possible match (shared part number)Floworks Usa Lp Dba Flotech Div Jacksonville

4820-01-560-293815051C-FF 2.00IN NO 3 POSSIBLE MATCH

DISK,VALVE

Possible match (shared part number)Floworks Usa Lp Dba Flotech Div Jacksonville

5330-01-560-296815051C-FF 2.00IN NO 8 POSSIBLE MATCH

GASKET

Possible match (shared part number)Floworks Usa Lp Dba Flotech Div Jacksonville

Cross-Reference Index

Part Number	Manufacturer
15051C-FF 2.50IN PRIMARY	Floworks Usa Lp Dba Flotech Div Jacksonville (USA)
15051C-FF ASSY 15051C-FF 2.50IN	Floworks Usa Lp Dba Flotech Div Jacksonville (USA)

Reference documents

Reference	Meaning
15051C-FF	D/9 Drawing number reference only Floworks Usa Lp Dba Flotech Div Jacksonville

Related Parts

4820-01-537-0650POSSIBLE MATCH

DISK,VALVE

15051C-FF 2.50IN NO. 3

4820-01-537-0676POSSIBLE MATCH

DISK,VALVE

15051C-FF 6.00IN NO. 3

4820-01-537-0728POSSIBLE MATCH

DISK,VALVE

15051C-FF 8.00IN NO. 3

4820-01-537-1119POSSIBLE MATCH

DISK,VALVE

15051C-FF 3.00IN NO. 3

5330-01-537-4372POSSIBLE MATCH

GASKET

15051C-FF 6.00IN NO. 8

5330-01-537-4378POSSIBLE MATCH

GASKET

15051C-FF 2.50IN NO. 8

5330-01-537-4387POSSIBLE MATCH

GASKET

15051C-FF 3.00IN NO. 8

4820-01-560-2938POSSIBLE MATCH

DISK,VALVE

15051C-FF 2.00IN NO 3

5330-01-560-2968POSSIBLE MATCH

GASKET

15051C-FF 2.00IN NO 8

Frequently Asked Questions

What is NSN 4820-01-537-0640?

NSN 4820-01-537-0640 is a Valve,check, manufactured by Floworks Usa Lp Dba Flotech Div Jacksonville, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-537-0640?

NSN 4820-01-537-0640 has 2 manufacturer part numbers on file: 15051C-FF 2.50IN (Floworks Usa Lp Dba Flotech Div Jacksonville), 15051C-FF ASSY 15051C-FF 2.50IN (Floworks Usa Lp Dba Flotech Div Jacksonville).

What NSN replaces 4820-01-537-0640?

9 possible matches (shared part number, not a government interchangeability claim): 4820-01-537-0650, 4820-01-537-0676, 4820-01-537-0728. Verify interchangeability with system specifications before substitution.

Is NSN 4820-01-537-0640 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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