PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

86602-1System Relief Valve

Mayhew Industries, Inc. · NSN 4330-01-488-6458 · FSC 4330 · No Item Name Available
Verified by PartsTable
NSN 4330-01-488-6458 — this item is cataloged by the U.S. Government under National Stock Number 4330-01-488-6458. Primary manufacturer part number: 86602-1.
Features
  • System Relief Valve — FSC 4330
  • Criticality Code Justification: AGAV
  • 1 verified cross-reference
  • Primary manufacturer: Mayhew Industries, Inc.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The System Relief Valve, cataloged under National Stock Number 4330-01-488-6458, is classified within Federal Supply Class 4330 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Mayhew Industries, Inc.. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4330-01-488-6458
Primary Part Number86602-1
Item NameSystem Relief Valve
FSC / FSG4330 / 43 — No Item Name Available
ManufacturerMayhew Industries, Inc.
StatusACTIVE
Criticality Code JustificationAGAV
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5331-00-250-02270S026477 INTERCHANGEABLE
O-Ring
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5935-01-188-19631-86602-4 INTERCHANGEABLE
Jackscrew,electrical Connector
Te Connectivity Corporation
7025-01-463-9426M-SPX INTERCHANGEABLE
Interface Unit,automatic Data Pr
Nokia of America Corporation
Cross-Reference Index
Part NumberManufacturer
86602-1 Mayhew Industries, Inc. (USA)
Related Parts
5331-00-250-0227INTERCHANGEABLE
O-RING
0S026477
5935-01-188-1963INTERCHANGEABLE
JACKSCREW,ELECTRICAL CONNECTOR
1-86602-4
7025-01-463-9426INTERCHANGEABLE
INTERFACE UNIT,AUTOMATIC DATA PR
M-SPX

Frequently Asked Questions

What is NSN 4330-01-488-6458?

NSN 4330-01-488-6458 is a System Relief Valve, manufactured by Mayhew Industries, Inc., classified under FSC 4330 (No Item Name Available). Status: active.

What are the part numbers for NSN 4330-01-488-6458?

NSN 4330-01-488-6458 has 1 cross-referenced part number: 86602-1 (Mayhew Industries, Inc.).

What NSN replaces 4330-01-488-6458?

There are 3 known substitutes for 4330-01-488-6458: 5331-00-250-0227, 5935-01-188-1963, 7025-01-463-9426. Verify interchangeability with system specifications before substitution.

What are the specifications of 86602-1?

Key specifications for 86602-1: Criticality Code Justification: AGAV; End Item Identification: FIGHTER (NON-HSP) SUPPORT AIRCRAFT F/A-18; Part Name Assigned by Controlling Agency: INAVY - SYSTEM RELIEF VALVE. 3 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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