NSN 4820-01-201-6730 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-201-6730. Manufacturer of record part number: 77774-35X3 PC23.
Manufacturer of record: Derbyshire Machine & Tool Co
Identification
NSN: 4820-01-201-6730
NIIN: 012016730
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 77774-35X3 PC23
Manufacturer: Derbyshire Machine & Tool Co
General Description
The Retainer,ball Pivot,valve, cataloged under National Stock Number 4820-01-201-6730, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-201-6730
Primary Part Number
77774-35X3 PC23
Item Name
Retainer,ball Pivot,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Derbyshire Machine & Tool Co
Status
ACTIVE
General Characteristics Item Description
STEEL
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 Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-201-673177774-35X3 PIECE 5POSSIBLE MATCH
RETAINER,PIVOT,VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-202-034677774-35X3 PIECE 13POSSIBLE MATCH
RING,SPRAY
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-202-058677774-35X3 PIECE 1POSSIBLE MATCH
LEVER,REMOTE CONTROL
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
NSN 4820-01-201-6730 is a Retainer,ball Pivot,valve, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-201-6730?
NSN 4820-01-201-6730 has 1 manufacturer part number on file: 77774-35X3 PC23 (Derbyshire Machine & Tool Co).
What NSN replaces 4820-01-201-6730?
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-201-6731, 4820-01-202-0346, 3040-01-202-0586. Verify interchangeability with system specifications before substitution.
What are the specifications of 77774-35X3 PC23?
Key specifications for 77774-35X3 PC23: General Characteristics Item Description: STEEL. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-201-6730 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.