NSN 4820-01-553-5451 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-553-5451. Manufacturer of record part number: 6633-057-122.
Also searched as4820-01-553-5451 ·
4820015535451 ·
NIIN 015535451 ·
01-553-5451 ·
FSC 4820 Valves, Nonpowered · CAGE 57574 · 6633-057-122 · 7300-078 PC NO 8
Material Document and Classification: ASM 5387 ASSN STD SINGLE MATERIAL RESPONSE
Media for Which Designed: HYDRAULIC FLUID
Material: COBALT COMP 6
2 manufacturer part numbers on file
Manufacturer of record: Velan Valve Corp.
Identification
NSN: 4820-01-553-5451
NIIN: 015535451
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 6633-057-122
Manufacturer: Velan Valve Corp.
General Description
The Disk,valve, cataloged under National Stock Number 4820-01-553-5451, 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 4 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.
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
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4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-553-5451?
NSN 4820-01-553-5451 is a Disk,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-553-5451?
NSN 4820-01-553-5451 has 2 manufacturer part numbers on file: 7300-078 PC NO 8 (Velan Valve Corp.), 6633-057-122 (Velan Valve Corp.).
What are the specifications of 6633-057-122?
Key specifications for 6633-057-122: Style Designator: SWING CHECK; Material Document and Classification: ASM 5387 ASSN STD SINGLE MATERIAL RESPONSE; Special Features: USED ON 4820-01-553-5434; Media for Which Designed: HYDRAULIC FLUID. 4 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-553-5451 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.