Seat, Valve4820-01-643-7440

NSN 4820-01-643-7440 · NIIN 016437440 · Part number 7546-701-002-S

Velan Valve Corp. · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 57574

Government record, cited

NSN 4820-01-643-7440 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-643-7440. Manufacturer of record part number: 7546-701-002-S.

Also searched as 4820-01-643-7440 · 4820016437440 · NIIN 016437440 · 01-643-7440 · FSC 4820 Valves, Nonpowered · CAGE 57574 · 7546-701-002-S · 9999-002 IT6 PN 7546-701-002-S

Nearby stock numbers ← 4820-01-643-7370 Valve Assembly, Bonnet and Bellow · 4820-01-643-7456 Valve, Angle →

4820-01-643-7440 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Body Outside Diameter: 9.276 INCHES MINIMUM AND 9.279 INCHES MAXIMUM IN
Style Designator: PLAIN
Material Document and Classification: ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE OR GRB/ASTM A106 ASSN STD SINGLE MATERIAL RESPONSE SEAT
Body Inside Diameter: 7.938 INCHES NOMINAL IN
Material: STEEL SEAT
2 manufacturer part numbers on file
Manufacturer of record: Velan Valve Corp.

Identification

NSN: 4820-01-643-7440
NIIN: 016437440
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 7546-701-002-S
Manufacturer: Velan Valve Corp.

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-643-7440, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 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	4820-01-643-7440
Primary Part Number	7546-701-002-S
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Velan Valve Corp.
Status	ACTIVE
Body Outside Diameter	9.276 INCHES MINIMUM AND 9.279 INCHES MAXIMUM IN
Style Designator	PLAIN
Material Document and Classification	ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE OR GRB/ASTM A106 ASSN STD SINGLE MATERIAL RESPONSE SEAT
Body Inside Diameter	7.938 INCHES NOMINAL IN
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
9999-002 IT6 PN 7546-701-002-S	Velan Valve Corp. (USA)
7546-701-002-S PRIMARY	Velan Valve Corp. (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 4820-01-643-7440?

NSN 4820-01-643-7440 is a Seat,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-643-7440?

NSN 4820-01-643-7440 has 2 manufacturer part numbers on file: 9999-002 IT6 PN 7546-701-002-S (Velan Valve Corp.), 7546-701-002-S (Velan Valve Corp.).

What are the specifications of 7546-701-002-S?

Key specifications for 7546-701-002-S: Overall Height: 1.339 INCHES MINIMUM AND 1.344 INCHES MAXIMUM IN; Body Outside Diameter: 9.276 INCHES MINIMUM AND 9.279 INCHES MAXIMUM IN; Style Designator: PLAIN; Material Document and Classification: ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE OR GRB/ASTM A106 ASSN STD SINGLE MATERIAL RESPONSE SEAT. 5 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-643-7440 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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