PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

103221Gage,pressure,dial Indicating

Sub Aquatics, Inc. Dba Breathing Air Systems Div Sub-Aquatics Inc, Dba Breathing Air Systems · NSN 4220-01-725-5136 · FSC 4220 · No Item Name Available
Verified by PartsTable
NSN 4220-01-725-5136 — this item is cataloged by the U.S. Government under National Stock Number 4220-01-725-5136. Primary manufacturer part number: 103221.
Features
  • Gage,pressure,dial Indicating — FSC 4220
  • Indicator Type: POINTER
  • Actuation Type: BOURDON TUBE
  • Graduation Unit: 1000.0 POUNDS PER SQUARE INCH LBS
  • Mounting Method: CLAMP
  • Scale Accuracy: 3 2 3 PERCENT
  • Scale Name: POUNDS PER SQUARE INCH
  • Measurement Unit: POUNDS PER SQUARE INCH (PSI)
Applications
  • Applications requiring Steel Case construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 4220-01-725-5136, 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 Sub Aquatics, Inc. Dba Breathing Air Systems Div Sub-Aquatics Inc, Dba Breathing Air Systems. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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
NSN4220-01-725-5136
Primary Part Number103221
Item NameGage,pressure,dial Indicating
FSC / FSG4220 / 42 — No Item Name Available
ManufacturerSub Aquatics, Inc. Dba Breathing Air Systems Div Sub-Aquatics Inc, Dba Breathing Air Systems
StatusACTIVE
Indicator TypePOINTER
Actuation TypeBOURDON TUBE
Graduation Unit1000.0 POUNDS PER SQUARE INCH LBS
Mounting MethodCLAMP
Scale Accuracy3 2 3 PERCENT
Scale NamePOUNDS PER SQUARE INCH
Measurement UnitPOUNDS PER SQUARE INCH (PSI)
Display TypeDIAL
Scale Inscription/background ColorBLACK
Pointer ColorBLACK
MaterialSTEEL CASE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5310-00-261-734000103321 INTERCHANGEABLE
Washer,lock
Rolls-Royce Solutions America Inc
6685-00-426-67102429 INTERCHANGEABLE
Gage,compound Pressure-Vacuum,di
Alter Harry Co the Div of T E C
5985-00-467-18194034235-0701 INTERCHANGEABLE
Antenna
Raytheon Company Dba Raytheon Co
2530-00-491-4147103221 INTERCHANGEABLE
Fork Assembly,l H
Allianz Sweeper Company
5310-01-089-5865103221 INTERCHANGEABLE
Washer,lock
Rolls-Royce Solutions America Inc
5340-01-143-6432103221 INTERCHANGEABLE
Plate,mending
Triumph Engine Control Systems Llc
4820-01-212-48613WB313 INTERCHANGEABLE
Head,valve
Oshkosh Defense Llc
5930-01-321-8960620287100 INTERCHANGEABLE
Switch,sensitive
Hyster-Yale Group, Inc. Dba Yale Materials Handling
Cross-Reference Index
Part NumberManufacturer
103221 PRIMARY Sub Aquatics, Inc. Dba Breathing Air Systems Div Sub-Aquatics Inc, Dba Breathing Air Systems (USA)
GAG1 Sub Aquatics, Inc. Dba Breathing Air Systems Div Sub-Aquatics Inc, Dba Breathing Air Systems (USA)
Related Parts
5310-00-261-7340INTERCHANGEABLE
WASHER,LOCK
00103321
6685-00-426-6710INTERCHANGEABLE
GAGE,COMPOUND PRESSURE-VACUUM,DI
2429
5985-00-467-1819INTERCHANGEABLE
ANTENNA
4034235-0701
2530-00-491-4147INTERCHANGEABLE
FORK ASSEMBLY,L H
103221
5310-01-089-5865INTERCHANGEABLE
WASHER,LOCK
103221
5340-01-143-6432INTERCHANGEABLE
PLATE,MENDING
103221
4820-01-212-4861INTERCHANGEABLE
HEAD,VALVE
3WB313
5930-01-321-8960INTERCHANGEABLE
SWITCH,SENSITIVE
620287100

Frequently Asked Questions

What is NSN 4220-01-725-5136?

NSN 4220-01-725-5136 is a Gage,pressure,dial Indicating, manufactured by Sub Aquatics, Inc. Dba Breathing Air Systems Div Sub-Aquatics Inc, Dba Breathing Air Systems, classified under FSC 4220 (No Item Name Available). Status: active.

What are the part numbers for NSN 4220-01-725-5136?

NSN 4220-01-725-5136 has 2 cross-referenced part numbers: 103221 (Sub Aquatics, Inc. Dba Breathing Air Systems Div Sub-Aquatics Inc, Dba Breathing Air Systems), GAG1 (Sub Aquatics, Inc. Dba Breathing Air Systems Div Sub-Aquatics Inc, Dba Breathing Air Systems).

What NSN replaces 4220-01-725-5136?

There are 8 known substitutes for 4220-01-725-5136: 5310-00-261-7340, 6685-00-426-6710, 5985-00-467-1819 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 103221?

Key specifications for 103221: Indicator Type: POINTER; Actuation Type: BOURDON TUBE; Part Name Assigned by Controlling Agency: BOURDON TUBE PRESSURE GAUGE STAINLESS STEEL DRY CASE; Graduation Unit: 1000.0 POUNDS PER SQUARE INCH LBS. 15 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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