PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SS845-2050997ASSYB1-4INValve,ball

Electric Boat Corporation Div General Dynamics Electric Boat · NSN 4820-01-091-1306 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-091-1306 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-091-1306. Primary manufacturer part number: SS845-2050997ASSYB1-4IN.
Features
  • Valve,ball — FSC 4820
  • Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Material: STEEL CORROSION RESISTING OVERALL
  • Style Designator: STRAIGHT THRU
  • Nominal Pipe Size Accommodated: 0.250 INCHES ALL ENDS IN
  • Valve Operation Method: MANUAL
  • Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS
  • Connection Style: SOCKET ALL ENDS
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Valve,ball, cataloged under National Stock Number 4820-01-091-1306, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Electric Boat Corporation Div General Dynamics Electric Boat. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-091-1306
Primary Part NumberSS845-2050997ASSYB1-4IN
Item NameValve,ball
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerElectric Boat Corporation Div General Dynamics Electric Boat
StatusACTIVE
Operating Pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MaterialSTEEL CORROSION RESISTING OVERALL
Style DesignatorSTRAIGHT THRU
Nominal Pipe Size Accommodated0.250 INCHES ALL ENDS IN
Valve Operation MethodMANUAL
Connection TypeUNTHREADED INTERNAL PIPE ALL ENDS
Connection StyleSOCKET ALL ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
4730-01-096-34922050997 ASSY B INTERCHANGEABLE
Tailpiece,union
Naval Ship Systems Command
4820-01-107-70012640-611 ASSYB PIECE 13 INTERCHANGEABLE
Retainer,seat,valve
Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-220-55402640-611 ASSYD-DY INTERCHANGEABLE
Valve,ball
Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-220-55412640-611 ASSEMBLY G INTERCHANGEABLE
Valve,ball
Electric Boat Corporation Div General Dynamics Electric Boat
Cross-Reference Index
Part NumberManufacturer
SS845-2050997ASSYB1-4IN PRIMARY Electric Boat Corporation Div General Dynamics Electric Boat (USA)
845-2050997-H PRIMARY Hunt Valve Company, Inc. (USA)
SS845-2050997 Naval Ship Systems Command (USA)
845-2050997ASSYB1-4IN Naval Ship Systems Command (USA)
2640-611ASSYB1-4IN Electric Boat Corporation Div General Dynamics Electric Boat (USA)
845-2050997-H Morland Valve Co Inc Sub of Smith Valve Corp (USA)
Related Parts
4730-01-096-3492INTERCHANGEABLE
TAILPIECE,UNION
2050997 ASSY B
4820-01-107-7001INTERCHANGEABLE
RETAINER,SEAT,VALVE
2640-611 ASSYB PIECE 13
4820-01-220-5540INTERCHANGEABLE
VALVE,BALL
2640-611 ASSYD-DY
4820-01-220-5541INTERCHANGEABLE
VALVE,BALL
2640-611 ASSEMBLY G

Frequently Asked Questions

What is NSN 4820-01-091-1306?

NSN 4820-01-091-1306 is a Valve,ball, manufactured by Electric Boat Corporation Div General Dynamics Electric Boat, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-091-1306?

NSN 4820-01-091-1306 has 6 cross-referenced part numbers: SS845-2050997ASSYB1-4IN (Electric Boat Corporation Div General Dynamics Electric Boat), 845-2050997-H (Hunt Valve Company, Inc.), SS845-2050997 (Naval Ship Systems Command), 845-2050997ASSYB1-4IN (Naval Ship Systems Command), 2640-611ASSYB1-4IN (Electric Boat Corporation Div General Dynamics Electric Boat) and 1 more.

What NSN replaces 4820-01-091-1306?

There are 4 known substitutes for 4820-01-091-1306: 4730-01-096-3492, 4820-01-107-7001, 4820-01-220-5540 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SS845-2050997ASSYB1-4IN?

Key specifications for SS845-2050997ASSYB1-4IN: Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Material: STEEL CORROSION RESISTING OVERALL; Style Designator: STRAIGHT THRU; Nominal Pipe Size Accommodated: 0.250 INCHES ALL ENDS IN. 7 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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