PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

56-439Detector,gas

Honeywell Safety Products Usa, Inc. · NSN 6665-01-444-8322 · FSC 6665 · No Item Name Available
Verified by PartsTable
NSN 6665-01-444-8322 — this item is cataloged by the U.S. Government under National Stock Number 6665-01-444-8322. Primary manufacturer part number: 56-439.
Features
  • Detector,gas — FSC 6665
  • 3 verified cross-references
  • Primary manufacturer: Honeywell Safety Products Usa, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Detector,gas, cataloged under National Stock Number 6665-01-444-8322, is classified within Federal Supply Class 6665 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Honeywell Safety Products Usa, Inc.. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6665-01-444-8322
Primary Part Number56-439
Item NameDetector,gas
FSC / FSG6665 / 66 — No Item Name Available
ManufacturerHoneywell Safety Products Usa, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5360-00-115-3790N41968 INTERCHANGEABLE
Spring,helical,compression
Leslie Controls, Inc. Dba Leslie Controls Inc
1660-00-388-000756439 INTERCHANGEABLE
Nosepiece,oxygen Mask
Mine Safety Appliances Company
5340-00-529-17335291733 INTERCHANGEABLE
Locking Plate,nut and Bolt
U S Army Tank Automotive Command Amsta-Im-Mm
5342-00-673-0443 INTERCHANGEABLE
Caster Wheel
3020-01-101-299553039 INTERCHANGEABLE
Gear,helical
Trw Inc Trw Intl Trade Government Sales Dept
4320-01-121-071856439 INTERCHANGEABLE
Stationary Unit
A W Chesterton Co Div Sealing Device Division
2530-01-331-3581 INTERCHANGEABLE
Parts Kit,brake Booster
5360-01-476-4453 INTERCHANGEABLE
Spring,helical,compression
Cross-Reference Index
Part NumberManufacturer
53-039 Biosystems Inc Div Sperian Protection Americas Inc. (USA)
56-439 Biosystems Inc Div Sperian Protection Americas Inc. (USA)
56-439 PRIMARY Honeywell Safety Products Usa, Inc. (USA)
Related Parts
5360-00-115-3790INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
N41968
1660-00-388-0007INTERCHANGEABLE
NOSEPIECE,OXYGEN MASK
56439
5340-00-529-1733INTERCHANGEABLE
LOCKING PLATE,NUT AND BOLT
5291733
5342-00-673-0443INTERCHANGEABLE
CASTER WHEEL
3020-01-101-2995INTERCHANGEABLE
GEAR,HELICAL
53039
4320-01-121-0718INTERCHANGEABLE
STATIONARY UNIT
56439
2530-01-331-3581INTERCHANGEABLE
PARTS KIT,BRAKE BOOSTER
5360-01-476-4453INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION

Frequently Asked Questions

What is NSN 6665-01-444-8322?

NSN 6665-01-444-8322 is a Detector,gas, manufactured by Honeywell Safety Products Usa, Inc., classified under FSC 6665 (No Item Name Available). Status: active.

What are the part numbers for NSN 6665-01-444-8322?

NSN 6665-01-444-8322 has 3 cross-referenced part numbers: 53-039 (Biosystems Inc Div Sperian Protection Americas Inc.), 56-439 (Biosystems Inc Div Sperian Protection Americas Inc.), 56-439 (Honeywell Safety Products Usa, Inc.).

What NSN replaces 6665-01-444-8322?

There are 8 known substitutes for 6665-01-444-8322: 5360-00-115-3790, 1660-00-388-0007, 5340-00-529-1733 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 56-439?

Key specifications for 56-439: Special Features: TUBE-PROBE; End Item Identification: KGN; ANALYZER,GAS; E/I FSCM 62170. 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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