PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12539Valve,safety Relief

Itw Gse Inc. · NSN 4820-01-507-3446 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-507-3446 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-507-3446. Primary manufacturer part number: 12539.
Features
  • Valve,safety Relief — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Itw Gse Inc.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-507-3446, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Itw Gse Inc.. This item has 2 commercial cross-references from 2 manufacturers, 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
NSN4820-01-507-3446
Primary Part Number12539
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerItw Gse Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5310-01-257-901012539 INTERCHANGEABLE
Washer
Westerbeke Corporation
6550-01-332-4770212539 INTERCHANGEABLE
Gram Staining Kit
Becton, Dickinson and Company Dba Becton Dickinson & Co
Cross-Reference Index
Part NumberManufacturer
12539 Itw Gse Inc. (USA)
12539 Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems (USA)
Related Parts
5310-01-257-9010INTERCHANGEABLE
WASHER
12539
6550-01-332-4770INTERCHANGEABLE
GRAM STAINING KIT
212539

Frequently Asked Questions

What is NSN 4820-01-507-3446?

NSN 4820-01-507-3446 is a Valve,safety Relief, manufactured by Itw Gse Inc., classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-507-3446?

NSN 4820-01-507-3446 has 2 cross-referenced part numbers: 12539 (Itw Gse Inc.), 12539 (Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems).

What NSN replaces 4820-01-507-3446?

There are 2 known substitutes for 4820-01-507-3446: 5310-01-257-9010, 6550-01-332-4770. Verify interchangeability with system specifications before substitution.

What are the specifications of 12539?

Key specifications for 12539: End Item Identification: F/A-22 RAPTOR.. 1 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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