PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A503HP-3Cap,valve

Val-Matic Valve and Manufacturing Corporation · NSN 4820-01-463-4130 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-463-4130 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-463-4130. Primary manufacturer part number: A503HP-3.
Features
  • Cap,valve — FSC 4820
  • Valve Model Number for Which Designed: 503NX001
  • Attachment Method: GROOVED
  • Material: STEEL AND PLASTIC
  • 3 verified cross-references
  • Primary manufacturer: Val-Matic Valve and Manufacturing Corporation
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel and Plastic construction
General Description

The Cap,valve, cataloged under National Stock Number 4820-01-463-4130, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Val-Matic Valve and Manufacturing Corporation. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-463-4130
Primary Part NumberA503HP-3
Item NameCap,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerVal-Matic Valve and Manufacturing Corporation
StatusACTIVE
Valve Model Number for Which Designed503NX001
Attachment MethodGROOVED
MaterialSTEEL AND PLASTIC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
4730-00-279-035312Z8000-5 INTERCHANGEABLE
Fitting,lubrication
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
6930-01-050-1988A503-3 INTERCHANGEABLE
Converter,special
Cae Usa Inc.
Cross-Reference Index
Part NumberManufacturer
SS-796-PC3 Val-Matic Valve and Manufacturing Corporation (USA)
A503-3 Val-Matic Valve and Manufacturing Corporation (USA)
A503HP-3 PRIMARY Val-Matic Valve and Manufacturing Corporation (USA)
Related Parts
4730-00-279-0353INTERCHANGEABLE
FITTING,LUBRICATION
12Z8000-5
6930-01-050-1988INTERCHANGEABLE
CONVERTER,SPECIAL
A503-3

Frequently Asked Questions

What is NSN 4820-01-463-4130?

NSN 4820-01-463-4130 is a Cap,valve, manufactured by Val-Matic Valve and Manufacturing Corporation, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-463-4130?

NSN 4820-01-463-4130 has 3 cross-referenced part numbers: SS-796-PC3 (Val-Matic Valve and Manufacturing Corporation), A503-3 (Val-Matic Valve and Manufacturing Corporation), A503HP-3 (Val-Matic Valve and Manufacturing Corporation).

What NSN replaces 4820-01-463-4130?

There are 2 known substitutes for 4820-01-463-4130: 4730-00-279-0353, 6930-01-050-1988. Verify interchangeability with system specifications before substitution.

What are the specifications of A503HP-3?

Key specifications for A503HP-3: End Item Identification: W/S CODE NIMITZ CLASS CVN; Special Features: NHA VALVE SWG CHK; DISK IS INCASED IN BUNA-N RUBBER; Valve Model Number for Which Designed: 503NX001; Attachment Method: GROOVED. 5 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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