PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SS845-2181251ASSEMBLYRD PIECE2Cover,access

Naval Ship Systems Command · NSN 5340-01-140-4844 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-01-140-4844 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-140-4844. Primary manufacturer part number: SS845-2181251ASSEMBLYRD PIECE2.
Features
  • Cover,access — FSC 5340
  • Securing Device Type: THREADED FASTENER
  • Bolt Circle Diameter: 8.375 INCHES NOMINAL IN
  • Bolt Circle Hole Quantity: 9
  • Material: ALUMINUM
  • Peripheral Shape Style: ROUND, MULTI HOLES
  • Outside Diameter: 9.750 INCHES NOMINAL IN
  • 5 verified cross-references
Applications
  • Applications requiring Aluminum construction
General Description

The Cover,access, cataloged under National Stock Number 5340-01-140-4844, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Naval Ship Systems Command. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-01-140-4844
Primary Part NumberSS845-2181251ASSEMBLYRD PIECE2
Item NameCover,access
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerNaval Ship Systems Command
StatusACTIVE
Securing Device TypeTHREADED FASTENER
Bolt Circle Diameter8.375 INCHES NOMINAL IN
Bolt Circle Hole Quantity9
MaterialALUMINUM
Peripheral Shape StyleROUND, MULTI HOLES
Outside Diameter9.750 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 7
4820-00-104-4312S2471 INTERCHANGEABLE
Parts Kit,check Valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-063-0053SS845-2181251ASSY RD 5IN INTERCHANGEABLE
Valve,check
Naval Sea Systems Command
4820-01-074-0297 INTERCHANGEABLE
Valve,check
4820-01-105-751490205-000 INTERCHANGEABLE
Valve,check
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-162-9007S90058/300452 INTERCHANGEABLE
Disk,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-276-2696845-2181251 PIECE 27 INTERCHANGEABLE
Disk,valve
Naval Ship Systems Command
4820-01-281-58522620-927X9 ASSEMBLY RB INTERCHANGEABLE
Valve,check
Electric Boat Corporation Div General Dynamics Electric Boat
Cross-Reference Index
Part NumberManufacturer
SS845-2181251ASSEMBLYRD PIECE2 PRIMARY Naval Ship Systems Command (USA)
2620-927X9 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
SS845-2181251 Naval Ship Systems Command (USA)
2620-927X9ASSEMBLYRD PIECE 2 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
2620-927X9ASSEMBLYRD PIECE 2 National Oilwell (USA)
Related Parts
4820-00-104-4312INTERCHANGEABLE
PARTS KIT,CHECK VALVE
S2471
4820-01-063-0053INTERCHANGEABLE
VALVE,CHECK
SS845-2181251ASSY RD 5IN
4820-01-074-0297INTERCHANGEABLE
VALVE,CHECK
4820-01-105-7514INTERCHANGEABLE
VALVE,CHECK
90205-000
4820-01-162-9007INTERCHANGEABLE
DISK,VALVE
S90058/300452
4820-01-276-2696INTERCHANGEABLE
DISK,VALVE
845-2181251 PIECE 27
4820-01-281-5852INTERCHANGEABLE
VALVE,CHECK
2620-927X9 ASSEMBLY RB

Frequently Asked Questions

What is NSN 5340-01-140-4844?

NSN 5340-01-140-4844 is a Cover,access, manufactured by Naval Ship Systems Command, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-01-140-4844?

NSN 5340-01-140-4844 has 5 cross-referenced part numbers: SS845-2181251ASSEMBLYRD PIECE2 (Naval Ship Systems Command), 2620-927X9 (Electric Boat Corporation Div General Dynamics Electric Boat), SS845-2181251 (Naval Ship Systems Command), 2620-927X9ASSEMBLYRD PIECE 2 (Electric Boat Corporation Div General Dynamics Electric Boat), 2620-927X9ASSEMBLYRD PIECE 2 (National Oilwell).

What NSN replaces 5340-01-140-4844?

There are 7 known substitutes for 5340-01-140-4844: 4820-00-104-4312, 4820-01-063-0053, 4820-01-074-0297 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SS845-2181251ASSEMBLYRD PIECE2?

Key specifications for SS845-2181251ASSEMBLYRD PIECE2: Securing Device Type: THREADED FASTENER; Bolt Circle Diameter: 8.375 INCHES NOMINAL IN; Bolt Circle Hole Quantity: 9; Material: ALUMINUM. 6 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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