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NSN 4820-01-042-4979Government record, cited
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Flushing Block, Hydraulic System4820-01-042-4979

NSN 4820-01-042-4979 · NIIN 010424979 · Part number 29058-001
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 78062
Government record, cited
NSN 4820-01-042-4979 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-042-4979. Manufacturer of record part number: 29058-001.
Also searched as  4820-01-042-4979 · 4820010424979 · NIIN 010424979 · 01-042-4979 · FSC 4820 Valves, Nonpowered · CAGE 78062 · 29058-001 · 20366-001 · 20366-001 NOTE 13 · 20366-001 N0TE
Nearby stock numbers  ·
GATE VALVE PROFILE
4820-01-042-4979 — Valves, Nonpowered
Features
  • Flushing Block,hydraulic System — FSC 4820
  • Furnished Items and Quantity: 4 CAP SCREW AND 4 WASHER
  • Port Quantity: 3
  • Material Document and Classification: QQ-A-225/8, 6061-T651 FED SPEC SINGLE MATERIAL RESPONSE
  • Material: ALUMINUM ALLOY 6061
  • 1 manufacturer part number on file
  • Manufacturer of record: Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Identification
  • NSN: 4820-01-042-4979
  • NIIN: 010424979
  • FSC: 4820 — Valves, Nonpowered
  • FSG: 48 — Valves
  • Primary part number: 29058-001
  • Manufacturer: Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
General Description

The Flushing Block,hydraulic System, cataloged under National Stock Number 4820-01-042-4979, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace. Government technical data includes 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government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.

Technical Specifications
ParameterValue
NSN4820-01-042-4979
Primary Part Number29058-001
Item NameFlushing Block,hydraulic System
FSC / FSG4820 / 48 — Valves, Nonpowered
ManufacturerSargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
StatusACTIVE
Furnished Items and Quantity4 CAP SCREW AND 4 WASHER
Port Quantity3
Material Document and ClassificationQQ-A-225/8, 6061-T651 FED SPEC SINGLE MATERIAL RESPONSE
MaterialALUMINUM ALLOY 6061
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 9
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5365-01-042-566002-0001-02 POSSIBLE MATCH
PLUG,MACHINE THREAD
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
5330-01-042-906302-099050 POSSIBLE MATCH
RING,WIPER
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-042-912020366-410 POSSIBLE MATCH
SLEEVE AND SLIDE,DIRECTIONAL CON
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-044-166920366-420 POSSIBLE MATCH
ROLLER SET
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-051-2006 POSSIBLE MATCH
VALVE ASSEMBLY
Possible match (shared part number)
5340-01-103-639220366-1200 POSSIBLE MATCH
SEAT,HELICAL COMPRESSION SPRING
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
5342-01-164-713020366-1210 POSSIBLE MATCH
BRACKET,ANTI-ROTATION
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-178-488220366-1180 POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-189-665520366-450 POSSIBLE MATCH
ADJUSTER,HOUSING
Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Cross-Reference Index
Part NumberManufacturer
29058-001 PRIMARY Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
Reference documents
ReferenceMeaning
20366-001 D/9 Drawing number reference only
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
20366-001 NOTE 13 5/9 Secondary reference
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
20366-001 N0TE C/1 Advisory reference — outside the item-of-supply concept
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Related Parts
5365-01-042-5660POSSIBLE MATCH
PLUG,MACHINE THREAD
02-0001-02
5330-01-042-9063POSSIBLE MATCH
RING,WIPER
02-099050
4820-01-042-9120POSSIBLE MATCH
SLEEVE AND SLIDE,DIRECTIONAL CON
20366-410
4820-01-044-1669POSSIBLE MATCH
ROLLER SET
20366-420
4820-01-051-2006POSSIBLE MATCH
VALVE ASSEMBLY
5340-01-103-6392POSSIBLE MATCH
SEAT,HELICAL COMPRESSION SPRING
20366-1200
5342-01-164-7130POSSIBLE MATCH
BRACKET,ANTI-ROTATION
20366-1210
4820-01-178-4882POSSIBLE MATCH
STEM,FLUID VALVE
20366-1180
4820-01-189-6655POSSIBLE MATCH
ADJUSTER,HOUSING
20366-450

Frequently Asked Questions

What is NSN 4820-01-042-4979?

NSN 4820-01-042-4979 is a Flushing Block,hydraulic System, manufactured by Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-042-4979?

NSN 4820-01-042-4979 has 1 manufacturer part number on file: 29058-001 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace).

What NSN replaces 4820-01-042-4979?

9 possible matches (shared part number, not a government interchangeability claim): 5365-01-042-5660, 5330-01-042-9063, 4820-01-042-9120. Verify interchangeability with system specifications before substitution.

What are the specifications of 29058-001?

Key specifications for 29058-001: Furnished Items and Quantity: 4 CAP SCREW AND 4 WASHER; Overall Height: 2.620 INCHES NOMINAL IN; Port Quantity: 3; Material Document and Classification: QQ-A-225/8, 6061-T651 FED SPEC SINGLE MATERIAL RESPONSE. 4 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-042-4979 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.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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