PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

502.593Diving Mask

Aqualung Usa, Inc · NSN 4220-01-580-8661 · FSC 4220 · No Item Name Available
Verified by PartsTable
NSN 4220-01-580-8661 — this item is cataloged by the U.S. Government under National Stock Number 4220-01-580-8661. Primary manufacturer part number: 502.593.
Features
  • Diving Mask — FSC 4220
  • 2 verified cross-references
  • Primary manufacturer: Aqualung Usa, Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Diving Mask, cataloged under National Stock Number 4220-01-580-8661, is classified within Federal Supply Class 4220 (No Item Name Available) of the Fire Fighting, Rescue, and Safety Equipment group. The primary manufacturer of record is Aqualung Usa, Inc. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameDiving Mask
FSC / FSG4220 — No Item Name Available (FSG 42)
ManufacturersAqualung Usa, Inc (CAGE 94120); U S Divers Co Aqua Lung Div (CAGE 1K964)
Technical Specifications
ParameterValue
NSN4220-01-580-8661
Primary Part Number502.593
Item NameDiving Mask
FSC / FSG4220 / 42 — No Item Name Available
ManufacturerAqualung Usa, Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5940-00-204-82254-170 INTERCHANGEABLE
Terminal Board
Cinch Connectivity Solutions Inc.
5962-01-130-7441 INTERCHANGEABLE
Microcircuit,digital
5310-01-486-8959502593 INTERCHANGEABLE
Washer,shouldered
Aimtron Systems, Llc
5365-01-624-7367502593 INTERCHANGEABLE
Spacer,sleeve
Amsafe, Inc. Div Amsafe
Cross-Reference Index
Part NumberManufacturer
502.593 PRIMARY Aqualung Usa, Inc (USA)
502.593 U S Divers Co Aqua Lung Div (USA)
Related Parts
5940-00-204-8225INTERCHANGEABLE
TERMINAL BOARD
4-170
5962-01-130-7441INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
5310-01-486-8959INTERCHANGEABLE
WASHER,SHOULDERED
502593
5365-01-624-7367INTERCHANGEABLE
SPACER,SLEEVE
502593

Frequently Asked Questions

What is NSN 4220-01-580-8661?

NSN 4220-01-580-8661 is a Diving Mask, manufactured by Aqualung Usa, Inc, classified under FSC 4220 (No Item Name Available). Status: active.

What are the part numbers for NSN 4220-01-580-8661?

NSN 4220-01-580-8661 has 2 cross-referenced part numbers: 502.593 (Aqualung Usa, Inc), 502.593 (U S Divers Co Aqua Lung Div).

What NSN replaces 4220-01-580-8661?

There are 4 known substitutes for 4220-01-580-8661: 5940-00-204-8225, 5962-01-130-7441, 5310-01-486-8959 and 1 more. Verify interchangeability with system specifications before substitution.

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