PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

D15-640BPC618Cap,valve

Northrop Grumman Systems Corporation Div Marine Systems · NSN 4820-00-388-6850 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-388-6850 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-388-6850. Primary manufacturer part number: D15-640BPC618.
Features
  • Cap,valve — FSC 4820
  • Material: STEEL
  • 50 verified cross-references
  • Primary manufacturer: Northrop Grumman Systems Corporation Div Marine Systems
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel construction
General Description

The Cap,valve, cataloged under National Stock Number 4820-00-388-6850, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Northrop Grumman Systems Corporation Div Marine Systems. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 50 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-388-6850
Primary Part NumberD15-640BPC618
Item NameCap,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation Div Marine Systems
StatusACTIVE
MaterialSTEEL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5330-00-249-527534-11-1 INTERCHANGEABLE
Packing,preformed
Porta Drill Inc
3020-00-453-937234111 INTERCHANGEABLE
Gear,bevel
Safran Power Usa Llc
5940-00-549-490434111 INTERCHANGEABLE
Terminal,lug
Te Connectivity Corporation
5342-00-827-05463-4-1-11 INTERCHANGEABLE
Tie Rod,tensioning,threaded End
Celtech Corporation Div Use CAGE 65552 for All Orders
5315-01-171-345434111 INTERCHANGEABLE
Pin
Danuser Machine Co
Cross-Reference Index
Part NumberManufacturer
D15-640IPC618 Westinghouse Electric Corp (USA)
D15-463GPC205 Westinghouse Electric Corp (USA)
D15-426APC224 Westinghouse Electric Corp (USA)
D15-699MPC648 Westinghouse Electric Corp (USA)
D15-405QPC205 Westinghouse Electric Corp (USA)
D15-430GPC224 Westinghouse Electric Corp (USA)
D15-680UPC383 Westinghouse Electric Corp (USA)
D15-651IPC621 Westinghouse Electric Corp Sturtevant Div (USA)
D15-509VPC648 Westinghouse Electric Corp (USA)
D15-640QPC618 Westinghouse Electric Corp (USA)
D15-430APC224 Westinghouse Electric Corp (USA)
D15-699VPC648 Westinghouse Electric Corp (USA)
D15-651PPC621 Westinghouse Electric Corp (USA)
D15-631QPC618 Westinghouse Electric Corp (USA)
D15-426LPC224 Westinghouse Electric Corp (USA)
D15-651IPC621 Westinghouse Electric Corp (USA)
D15-509WPC621 Westinghouse Electric Corp (USA)
D15-699LPC621 Westinghouse Electric Corp (USA)
D15-509UPC621 Westinghouse Electric Corp (USA)
D15-509BPC621 Westinghouse Electric Corp (USA)
Related Parts
5330-00-249-5275INTERCHANGEABLE
PACKING,PREFORMED
34-11-1
3020-00-453-9372INTERCHANGEABLE
GEAR,BEVEL
34111
5940-00-549-4904INTERCHANGEABLE
TERMINAL,LUG
34111
5342-00-827-0546INTERCHANGEABLE
TIE ROD,TENSIONING,THREADED END
3-4-1-11
5315-01-171-3454INTERCHANGEABLE
PIN
34111

Frequently Asked Questions

What is NSN 4820-00-388-6850?

NSN 4820-00-388-6850 is a Cap,valve, manufactured by Northrop Grumman Systems Corporation Div Marine Systems, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-388-6850?

NSN 4820-00-388-6850 has 50 cross-referenced part numbers: D15-640IPC618 (Westinghouse Electric Corp), D15-463GPC205 (Westinghouse Electric Corp), D15-426APC224 (Westinghouse Electric Corp), D15-699MPC648 (Westinghouse Electric Corp), D15-405QPC205 (Westinghouse Electric Corp) and 45 more.

What NSN replaces 4820-00-388-6850?

There are 5 known substitutes for 4820-00-388-6850: 5330-00-249-5275, 3020-00-453-9372, 5940-00-549-4904 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of D15-640BPC618?

Key specifications for D15-640BPC618: Material: STEEL; End Item Identification: B.F. STURTEVANT CO MAIN FEED PUMP TURBINE SZ CC-22. 2 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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