NSN 4820-01-348-4277 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-348-4277. Manufacturer of record part number: 556-6405334-AY98.
Nominal Pipe Size Accommodated: 0.250 INCHES ALL ENDS IN
Connection Style: SOCKET ALL ENDS
Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS
Style Designator: STRAIGHT THRU
Bonnet Type: INSIDE SCREW
Maximum Operating Temp: 160.0 FAHRENHEIT SINGLE RESPONSE DEGF
Bonnet Attachment Method: BOLTED
Identification
NSN: 4820-01-348-4277
NIIN: 013484277
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 556-6405334-AY98
Manufacturer: Naval Sea Systems Command
General Description
The Valve,ball, cataloged under National Stock Number 4820-01-348-4277, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 12 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-348-4277
Primary Part Number
556-6405334-AY98
Item Name
Valve,ball
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Nominal Pipe Size Accommodated
0.250 INCHES ALL ENDS IN
Connection Style
SOCKET ALL ENDS
Connection Type
UNTHREADED INTERNAL PIPE ALL ENDS
Style Designator
STRAIGHT THRU
Bonnet Type
INSIDE SCREW
Maximum Operating Temp
160.0 FAHRENHEIT SINGLE RESPONSE DEGF
Bonnet Attachment Method
BOLTED
Media for Which Designed
OIL, HYDRAULIC SINGLE RESPONSE
Material
STEEL CORROSION RESISTING BODY
Valve Operation Method
MANUAL
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 Items12
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-348-4381556-6405334-19POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-348-6734556-6405334-26POSSIBLE MATCH
STOP,MANUAL CONTROL LEVER
Possible match (shared part number)Naval Sea Systems Command
4820-01-349-7905556-6405334-51POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-414-4403211080541POSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-3164211055373POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-3165556-6405334-AY70POSSIBLE MATCH
VALVE,BALL
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-3166211055410POSSIBLE MATCH
SEAT,VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-3167211055386/211055410POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-415-3170556-6405334-123POSSIBLE MATCH
RETAINER,SEAT,VALVE
Possible match (shared part number)Naval Sea Systems Command
4820-01-429-9922211045560,211036226POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Naval Sea Systems Command
NSN 4820-01-348-4277 is a Valve,ball, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-348-4277?
NSN 4820-01-348-4277 has 2 manufacturer part numbers on file: 211030120 (Naval Sea Systems Command), 556-6405334-AY98 (Naval Sea Systems Command).
What NSN replaces 4820-01-348-4277?
12 possible matches (shared part number, not a government interchangeability claim): 4820-01-348-4381, 4820-01-348-6734, 4820-01-349-7905. Verify interchangeability with system specifications before substitution.
What are the specifications of 556-6405334-AY98?
Key specifications for 556-6405334-AY98: Nominal Pipe Size Accommodated: 0.250 INCHES ALL ENDS IN; Connection Style: SOCKET ALL ENDS; Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRU. 10 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-348-4277 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.