Flushing Block4820-01-057-6561

NSN 4820-01-057-6561 · NIIN 010576561

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-057-6561 · 4820010576561 · NIIN 010576561 · 01-057-6561 · FSC 4820 Valves, Nonpowered

Nearby stock numbers ← 4820-01-057-6362 Disk, Valve · 4820-01-057-6563 Disk, Valve →

4820-01-057-6561 — Valves, Nonpowered

Features

Flushing Block — FSC 4820
General Characteristics Item Description: STAINLESS STEEL; 8.625 IN. LG; 6.125 IN. W; 2.500 IN. H; FOUR BOLTS; FOUR WASHERS; FOUR BOLT HOLES 0.535 IN. DIA; FOUR PORTS 1.350 IN. DIA UNTHREADED IN

Identification

NSN: 4820-01-057-6561
NIIN: 010576561
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Flushing Block, cataloged under National Stock Number 4820-01-057-6561, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-057-6561
Item Name	Flushing Block
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
General Characteristics Item Description	STAINLESS STEEL; 8.625 IN. LG; 6.125 IN. W; 2.500 IN. H; FOUR BOLTS; FOUR WASHERS; FOUR BOLT HOLES 0.535 IN. DIA; FOUR PORTS 1.350 IN. DIA UNTHREADED IN

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 1

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

5895-01-684-971729061-001 POSSIBLE MATCH

COVER,ELECTRONIC COMMUNICATION E

Possible match (shared part number)Teledyne Flir Defense, Inc.

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
29061-001	3/9 Design control — primary reference Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace

Related Parts

5895-01-684-9717POSSIBLE MATCH

COVER,ELECTRONIC COMMUNICATION E

29061-001

Frequently Asked Questions

What is NSN 4820-01-057-6561?

NSN 4820-01-057-6561 is a Flushing Block, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-057-6561?

1 possible match (shared part number, not a government interchangeability claim): 5895-01-684-9717. Verify interchangeability with system specifications before substitution.

What are the specifications of 4820-01-057-6561?

Key specifications for 4820-01-057-6561: General Characteristics Item Description: STAINLESS STEEL; 8.625 IN. LG; 6.125 IN. W; 2.500 IN. H; FOUR BOLTS; FOUR WASHERS; FOUR BOLT HOLES 0.535 IN. DIA; FOUR PORTS 1.350 IN. DIA UNTHREADED IN. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-057-6561 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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