The Valve-Hand,bypass, cataloged under National Stock Number 4820-01-729-3907, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Valve-Hand,bypass
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Technical Specifications
Parameter
Value
NSN
4820-01-729-3907
Item Name
Valve-Hand,bypass
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
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 Items3
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5330-01-729-39274460341-0016POSSIBLE MATCH
RETAINER,PACKING
Possible match (shared part number)Marotta Controls Inc
5305-01-729-3944107572-0122POSSIBLE MATCH
RETAINER,SCREW
Possible match (shared part number)Marotta Controls Inc
5305-01-729-3947104870-0001POSSIBLE MATCH
POPPET,SCREW
Possible match (shared part number)Marotta Controls Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
285091-1002
3/2Design control — primary reference
U.S. Government activity
Related Parts
5330-01-729-3927POSSIBLE MATCH
RETAINER,PACKING
4460341-0016
5305-01-729-3944POSSIBLE MATCH
RETAINER,SCREW
107572-0122
5305-01-729-3947POSSIBLE MATCH
POPPET,SCREW
104870-0001
Frequently Asked Questions
What is NSN 4820-01-729-3907?
NSN 4820-01-729-3907 is a Valve-Hand,bypass, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-729-3907?
3 possible matches (shared part number, not a government interchangeability claim): 5330-01-729-3927, 5305-01-729-3944, 5305-01-729-3947. Verify interchangeability with system specifications before substitution.
Is NSN 4820-01-729-3907 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.