General Characteristics Item Description: STEEL,MIL-S-16113,TYPE1,GR HT,CL U; 0.500 IN. OD,1.500 IN. LG IN
Identification
NSN: 4820-01-108-7804
NIIN: 011087804
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
General Description
The Arm,knocker,valve, cataloged under National Stock Number 4820-01-108-7804, 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1 specification, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-108-7804
Item Name
Arm,knocker,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
General Characteristics Item Description
STEEL,MIL-S-16113,TYPE1,GR HT,CL U; 0.500 IN. OD,1.500 IN. LG IN
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 Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5340-01-108-86584384539-0193POSSIBLE MATCH
CRANK,HAND
Possible match (shared part number)Naval Ship Systems Command
4810-01-120-0503803-4384539-034POSSIBLE MATCH
RETAINER,PAD
Possible match (shared part number)Naval Ship Systems Command
2590-01-123-1746810-4384539 PIECE 42POSSIBLE MATCH
BRACKET,EYE,ROTATING SHAFT
Possible match (shared part number)Naval Ship Systems Command
3040-01-126-7406810-4384539 PIECE 121POSSIBLE MATCH
CAM,CONTROL
Possible match (shared part number)Naval Ship Systems Command
4810-01-133-7418810-4384539 PIECE 126POSSIBLE MATCH
BRACKET ASSEMBLY,VALVE
Possible match (shared part number)Naval Ship Systems Command
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
810-4384539
D/9Drawing number reference only
U.S. Government activity
810-4384539 PIECE 122
5/2Secondary reference
U.S. Government activity
810-4384539-122
3/2Design control — primary reference
U.S. Government activity
Related Parts
5340-01-108-8658POSSIBLE MATCH
CRANK,HAND
4384539-0193
4810-01-120-0503POSSIBLE MATCH
RETAINER,PAD
803-4384539-034
2590-01-123-1746POSSIBLE MATCH
BRACKET,EYE,ROTATING SHAFT
810-4384539 PIECE 42
3040-01-126-7406POSSIBLE MATCH
CAM,CONTROL
810-4384539 PIECE 121
4810-01-133-7418POSSIBLE MATCH
BRACKET ASSEMBLY,VALVE
810-4384539 PIECE 126
Frequently Asked Questions
What is NSN 4820-01-108-7804?
NSN 4820-01-108-7804 is a Arm,knocker,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-108-7804?
5 possible matches (shared part number, not a government interchangeability claim): 5340-01-108-8658, 4810-01-120-0503, 2590-01-123-1746. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-108-7804?
Key specifications for 4820-01-108-7804: General Characteristics Item Description: STEEL,MIL-S-16113,TYPE1,GR HT,CL U; 0.500 IN. OD,1.500 IN. LG IN; End Item Identification: FOR 12 IN. SEA WATER HULL AND BACK-UP VALVE IN. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-108-7804 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.