The Stem,fluid Valve, cataloged under National Stock Number 4820-01-157-3617, 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1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-157-3617
Item Name
Stem,fluid Valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Material
ALUMINUM ALLOY
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.
4730-01-157-64622640-599ITEM5POSSIBLE MATCH
TAILPIECE,UNION
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-158-40612640-599ITEM8POSSIBLE MATCH
NUT,UNION
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4730-01-274-043311-97-2913AWPOSSIBLE MATCH
FITTING,LUBRICATION
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
5315-01-692-30702640-599-PIECE NO 14POSSIBLE MATCH
PIN,SHOULDER,HEADED
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
2640-599ITEM2
3/2Design control — primary reference
U.S. Government activity
2640-599
D/9Drawing number reference only
U.S. Government activity
Related Parts
4730-01-157-6462POSSIBLE MATCH
TAILPIECE,UNION
2640-599ITEM5
4730-01-158-4061POSSIBLE MATCH
NUT,UNION
2640-599ITEM8
4730-01-274-0433POSSIBLE MATCH
FITTING,LUBRICATION
11-97-2913AW
5315-01-692-3070POSSIBLE MATCH
PIN,SHOULDER,HEADED
2640-599-PIECE NO 14
Frequently Asked Questions
What is NSN 4820-01-157-3617?
NSN 4820-01-157-3617 is a Stem,fluid Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-157-3617?
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-157-6462, 4730-01-158-4061, 4730-01-274-0433. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-157-3617?
Key specifications for 4820-01-157-3617: Overall Length: 2.109 INCHES NOMINAL IN; Material: ALUMINUM ALLOY. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-157-3617 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.