PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

DP5521Adapter,divers Mask

Ministry of Defence, De&s Underwater and Electronic Warfare Pt (uew Ipt) · NSN 4220-01-183-2998 · FSC 4220 · No Item Name Available
Verified by PartsTable
NSN 4220-01-183-2998 — this item is cataloged by the U.S. Government under National Stock Number 4220-01-183-2998. Primary manufacturer part number: DP5521.
Features
  • Adapter,divers Mask — FSC 4220
  • 5 verified cross-references
  • Primary manufacturer: Ministry of Defence, De&s Underwater and Electronic Warfare Pt (uew Ipt)
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Adapter,divers Mask, cataloged under National Stock Number 4220-01-183-2998, 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 Ministry of Defence, De&s Underwater and Electronic Warfare Pt (uew Ipt). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameAdapter,divers Mask
FSC / FSG4220 — No Item Name Available (FSG 42)
ManufacturersMinistry of Defence, De&s Underwater and Electronic Warfare Pt (uew Ipt) (CAGE KCTY1); Honeywell Aerospace Yeovil Div Aerospace -Yeovil (CAGE U1605); Kirby Morgan Dive Systems Inc (CAGE 58366); Ministry of Defence, De&s Underwater and Electronic Warfare Pt (uew Ipt) (CAGE K1806)
Technical Specifications
ParameterValue
NSN4220-01-183-2998
Primary Part NumberDP5521
Item NameAdapter,divers Mask
FSC / FSG4220 / 42 — No Item Name Available
ManufacturerMinistry of Defence, De&s Underwater and Electronic Warfare Pt (uew Ipt)
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5305-00-012-9887 INTERCHANGEABLE
Screw,wood
5120-00-090-4386PWA3347-4 INTERCHANGEABLE
Gage
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
3110-00-101-1784332A INTERCHANGEABLE
Cup,tapered Roller Bearing
The Timken Corporation
5365-00-102-79921886 INTERCHANGEABLE
Shim
Eaton Aerospace, Llc Dba Jackson South
4820-00-288-74771886 INTERCHANGEABLE
Valve,check
Champion Laboratories, Inc.
6780-00-731-87501886 INTERCHANGEABLE
Glass,and Set of Pa
William Powell Company, the Dba Powell Valve Div the Starflo Corporation
5910-00-851-60170180-0064 INTERCHANGEABLE
Capacitor,fixed,electrolytic
Keysight Technologies Inc
6515-00-904-56301886 INTERCHANGEABLE
Cuff,sphygmomanometer
W. a. Baum Co., Inc. Dba Wa Baum Co Inc
6240-00-946-9658 INTERCHANGEABLE
Lamp,incandescent
6250-01-263-7684 INTERCHANGEABLE
Lampholder
Cross-Reference Index
Part NumberManufacturer
DP5521 Ministry of Defence, De&s Underwater and Electronic Warfare Pt (uew Ipt) (GBR)
9147Y064 Honeywell Aerospace Yeovil Div Aerospace -Yeovil (GBR)
555-118 Kirby Morgan Dive Systems Inc (USA)
18-86 Kirby Morgan Dive Systems Inc (USA)
DP5521 Ministry of Defence, De&s Underwater and Electronic Warfare Pt (uew Ipt) (GBR)
Related Parts
5305-00-012-9887INTERCHANGEABLE
SCREW,WOOD
5120-00-090-4386INTERCHANGEABLE
GAGE
PWA3347-4
3110-00-101-1784INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
332A
5365-00-102-7992INTERCHANGEABLE
SHIM
1886
4820-00-288-7477INTERCHANGEABLE
VALVE,CHECK
1886
6780-00-731-8750INTERCHANGEABLE
GLASS,AND SET OF PA
1886
5910-00-851-6017INTERCHANGEABLE
CAPACITOR,FIXED,ELECTROLYTIC
0180-0064
6515-00-904-5630INTERCHANGEABLE
CUFF,SPHYGMOMANOMETER
1886
6240-00-946-9658INTERCHANGEABLE
LAMP,INCANDESCENT
6250-01-263-7684INTERCHANGEABLE
LAMPHOLDER
5315-01-270-8282INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
6515-01-336-5898INTERCHANGEABLE
NEBULIZER,MEDICINAL

Frequently Asked Questions

What is NSN 4220-01-183-2998?

NSN 4220-01-183-2998 is a Adapter,divers Mask, manufactured by Ministry of Defence, De&s Underwater and Electronic Warfare Pt (uew Ipt), classified under FSC 4220 (No Item Name Available). Status: active.

What are the part numbers for NSN 4220-01-183-2998?

NSN 4220-01-183-2998 has 5 cross-referenced part numbers: DP5521 (Ministry of Defence, De&s Underwater and Electronic Warfare Pt (uew Ipt)), 9147Y064 (Honeywell Aerospace Yeovil Div Aerospace -Yeovil), 555-118 (Kirby Morgan Dive Systems Inc), 18-86 (Kirby Morgan Dive Systems Inc), DP5521 (Ministry of Defence, De&s Underwater and Electronic Warfare Pt (uew Ipt)).

What NSN replaces 4220-01-183-2998?

There are 12 known substitutes for 4220-01-183-2998: 5305-00-012-9887, 5120-00-090-4386, 3110-00-101-1784 and 9 more. Verify interchangeability with system specifications before substitution.

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