PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

525-620Tool Kit,regulator

Aqua-Air Industries, Inc. Dba Aqua Air Industries Inc Div Sta Sea Offshore Rentals (a Service of Aqua Air Ind., Inc.) · NSN 4220-01-544-1194 · FSC 4220 · No Item Name Available
Verified by PartsTable
NSN 4220-01-544-1194 — this item is cataloged by the U.S. Government under National Stock Number 4220-01-544-1194. Primary manufacturer part number: 525-620.
Features
  • Tool Kit,regulator — FSC 4220
  • 3 verified cross-references
  • Primary manufacturer: Aqua-Air Industries, Inc. Dba Aqua Air Industries Inc Div Sta Sea Offshore Rentals (a Service of Aqua Air Ind., Inc.)
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Tool Kit,regulator, cataloged under National Stock Number 4220-01-544-1194, 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 Aqua-Air Industries, Inc. Dba Aqua Air Industries Inc Div Sta Sea Offshore Rentals (a Service of Aqua Air Ind., Inc.). This item has 3 commercial cross-references from 3 manufacturers, 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
NSN4220-01-544-1194
Primary Part Number525-620
Item NameTool Kit,regulator
FSC / FSG4220 / 42 — No Item Name Available
ManufacturerAqua-Air Industries, Inc. Dba Aqua Air Industries Inc Div Sta Sea Offshore Rentals (a Service of Aqua Air Ind., Inc.)
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5330-00-154-77643638 INTERCHANGEABLE
Seal,plain Encased
Westinghouse Electric Corp
2930-00-695-8968 INTERCHANGEABLE
Diffuser
5180-01-205-4649525-620 INTERCHANGEABLE
Tool Kit,diving Regulator
Kirby Morgan Dive Systems Inc
Cross-Reference Index
Part NumberManufacturer
525-620 PRIMARY Aqua-Air Industries, Inc. Dba Aqua Air Industries Inc Div Sta Sea Offshore Rentals (a Service of Aqua Air Ind., Inc.) (USA)
10332767 Nimikkeistokeskus Ncb Finland (FIN)
DE1723 Jfd Ltd (GBR)
Related Parts
5330-00-154-7764INTERCHANGEABLE
SEAL,PLAIN ENCASED
3638
2930-00-695-8968INTERCHANGEABLE
DIFFUSER
5180-01-205-4649INTERCHANGEABLE
TOOL KIT,DIVING REGULATOR
525-620

Frequently Asked Questions

What is NSN 4220-01-544-1194?

NSN 4220-01-544-1194 is a Tool Kit,regulator, manufactured by Aqua-Air Industries, Inc. Dba Aqua Air Industries Inc Div Sta Sea Offshore Rentals (a Service of Aqua Air Ind., Inc.), classified under FSC 4220 (No Item Name Available). Status: active.

What are the part numbers for NSN 4220-01-544-1194?

NSN 4220-01-544-1194 has 3 cross-referenced part numbers: 525-620 (Aqua-Air Industries, Inc. Dba Aqua Air Industries Inc Div Sta Sea Offshore Rentals (a Service of Aqua Air Ind., Inc.)), 10332767 (Nimikkeistokeskus Ncb Finland), DE1723 (Jfd Ltd).

What NSN replaces 4220-01-544-1194?

There are 3 known substitutes for 4220-01-544-1194: 5330-00-154-7764, 2930-00-695-8968, 5180-01-205-4649. Verify interchangeability with system specifications before substitution.

What are the specifications of 525-620?

Key specifications for 525-620: Special Features: SETS UP AND REGULATES SUPER-LITE-17, SUPER-LITE-27 HELMET, KMB-18 AND KMB-28 BAND MASK. 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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