PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

550030SFacepiece,breathing Equipment

Honeywell Safety Products Usa, Inc. · NSN 4240-01-365-9538 · FSC 4240 · No Item Name Available
Verified by PartsTable
NSN 4240-01-365-9538 — this item is cataloged by the U.S. Government under National Stock Number 4240-01-365-9538. Primary manufacturer part number: 550030S.
Features
  • Facepiece,breathing Equipment — FSC 4240
  • Criticality Code Justification: FEAT
  • Facepiece Size Designation: SMALL
  • 14 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 Facepiece,breathing Equipment, cataloged under National Stock Number 4240-01-365-9538, is classified within Federal Supply Class 4240 (No Item Name Available) of the Fire Fighting, Rescue, and Safety Equipment group. The primary manufacturer of record is Honeywell Safety Products Usa, Inc.. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 14 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4240-01-365-9538
Primary Part Number550030S
Item NameFacepiece,breathing Equipment
FSC / FSG4240 / 42 — No Item Name Available
ManufacturerHoneywell Safety Products Usa, Inc.
StatusCANCELLED
Criticality Code JustificationFEAT
Facepiece Size DesignationSMALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5950-00-070-7644 INTERCHANGEABLE
Coil,radio Frequency
4820-00-141-9051301000 INTERCHANGEABLE
Valve,check
Transdigm Inc Div Aero Fluid Products
5905-00-356-7652311110 INTERCHANGEABLE
Resistor Network,fixed,film
Vishay Intertechnology, Inc.
6760-00-429-6304311-110 INTERCHANGEABLE
Lens,camera,motion Picture
Arriflex Corp
3439-00-446-11885100-00 INTERCHANGEABLE
Pin Set,pipe Flange
Mathey Intl Ltd
5962-00-879-6407330306 INTERCHANGEABLE
Microcircuit,linear
Bae Systems Information and Electronic Systems Integration Inc.
5905-00-983-9317311-0110-00 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Tektronix, Inc.
5977-01-084-2871 INTERCHANGEABLE
Brush,electrical Contact
5950-01-136-4156311-110 INTERCHANGEABLE
Transformer,power
B.c. Systems Inc. Dba Bc Systems Inc
6515-01-163-793830-1000 INTERCHANGEABLE
Forceps,hypophyseal
Specialty Surgical Instrumentation, Inc. Dba Symmetry Surgical Inc Div Symmetry Surgical
Cross-Reference Index
Part NumberManufacturer
301000 Honeywell Safety Products Usa, Inc. (USA)
6111S Dalloz Safety (USA)
14140145 Survivair Corp Sub of Comasec Inc (USA)
14140145 Dalloz Safety (USA)
14130392 Dalloz Safety (USA)
14130448 Survivair Corp Sub of Comasec Inc (USA)
550030S PRIMARY Honeywell Safety Products Usa, Inc. (USA)
6111S Survivair Corp Sub of Comasec Inc (USA)
14130448 Dalloz Safety (USA)
311110 Survivair Corp Sub of Comasec Inc (USA)
5100 Dalloz Safety (USA)
510000 Honeywell Safety Products Usa, Inc. (USA)
14140121 Dalloz Safety (USA)
5100 Survivair Corp Sub of Comasec Inc (USA)
Related Parts
5950-00-070-7644INTERCHANGEABLE
COIL,RADIO FREQUENCY
4820-00-141-9051INTERCHANGEABLE
VALVE,CHECK
301000
5905-00-356-7652INTERCHANGEABLE
RESISTOR NETWORK,FIXED,FILM
311110
6760-00-429-6304INTERCHANGEABLE
LENS,CAMERA,MOTION PICTURE
311-110
3439-00-446-1188INTERCHANGEABLE
PIN SET,PIPE FLANGE
5100-00
5962-00-879-6407INTERCHANGEABLE
MICROCIRCUIT,LINEAR
330306
5905-00-983-9317INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
311-0110-00
5977-01-084-2871INTERCHANGEABLE
BRUSH,ELECTRICAL CONTACT
5950-01-136-4156INTERCHANGEABLE
TRANSFORMER,POWER
311-110
6515-01-163-7938INTERCHANGEABLE
FORCEPS,HYPOPHYSEAL
30-1000
3040-01-188-2979INTERCHANGEABLE
CAM,CONTROL
30-1000
5962-01-390-2003INTERCHANGEABLE
MICROCIRCUIT,MEMORY
301000

Frequently Asked Questions

What is NSN 4240-01-365-9538?

NSN 4240-01-365-9538 is a Facepiece,breathing Equipment, manufactured by Honeywell Safety Products Usa, Inc., classified under FSC 4240 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4240-01-365-9538?

NSN 4240-01-365-9538 has 14 cross-referenced part numbers: 301000 (Honeywell Safety Products Usa, Inc.), 6111S (Dalloz Safety), 14140145 (Survivair Corp Sub of Comasec Inc), 14140145 (Dalloz Safety), 14130392 (Dalloz Safety) and 9 more.

What NSN replaces 4240-01-365-9538?

There are 12 known substitutes for 4240-01-365-9538: 5950-00-070-7644, 4820-00-141-9051, 5905-00-356-7652 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 550030S?

Key specifications for 550030S: Criticality Code Justification: FEAT; Facepiece Size Designation: SMALL; Special Features: SOLE SOURCE REQUIRED BY STATUTE 6.302. 3 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4240-01-365-9538 still in active supply?

NSN 4240-01-365-9538 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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