General Characteristics Item Description: STEEL KNOCKER 1; STEEL ACTUATOR
Identification
NSN: 4820-01-211-5341
NIIN: 012115341
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
General Description
The Arm,valve, cataloged under National Stock Number 4820-01-211-5341, 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1 specification, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-211-5341
Item Name
Arm,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
General Characteristics Item Description
STEEL KNOCKER 1; STEEL ACTUATOR
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.
4820-01-281-5945803-4384539 PIECE 20,26POSSIBLE MATCH
CONNECTING ROD AND BEARING ASSEM
Possible match (shared part number)Naval Ship Systems Command
4820-01-281-5947803-4384539-201POSSIBLE MATCH
TEST FIXTURE,VALVE
Possible match (shared part number)Naval Ship Systems Command
4820-01-281-5948803-4384539 PIECE 207-224POSSIBLE MATCH
BALL HANDLING TOOL CASE ASSEMBLY
Possible match (shared part number)Naval Ship Systems Command
3010-01-292-571276553-78X14 PIECE 4AND5POSSIBLE MATCH
COUPLING,SHAFT,RIGID
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
803-4384539 PIECE 123
3/2Design control — primary reference
U.S. Government activity
803-4384539
D/9Drawing number reference only
U.S. Government activity
810-4384539 PIECE 123
5/9Secondary reference
U.S. Government activity
Related Parts
4820-01-281-5945POSSIBLE MATCH
CONNECTING ROD AND BEARING ASSEM
803-4384539 PIECE 20,26
4820-01-281-5947POSSIBLE MATCH
TEST FIXTURE,VALVE
803-4384539-201
4820-01-281-5948POSSIBLE MATCH
BALL HANDLING TOOL CASE ASSEMBLY
803-4384539 PIECE 207-224
3010-01-292-5712POSSIBLE MATCH
COUPLING,SHAFT,RIGID
76553-78X14 PIECE 4AND5
Frequently Asked Questions
What is NSN 4820-01-211-5341?
NSN 4820-01-211-5341 is a Arm,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-211-5341?
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-281-5945, 4820-01-281-5947, 4820-01-281-5948. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-211-5341?
Key specifications for 4820-01-211-5341: General Characteristics Item Description: STEEL KNOCKER 1; STEEL ACTUATOR. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-211-5341 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.