PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6521Leak Detector,refrigerant Gas

Spx Corporation Dba O T C Tool & Equip Division Div Spx Corp - Kent-Moore/otc Divisons · NSN 4940-01-572-4234 · FSC 4940 · No Item Name Available
Verified by PartsTable
NSN 4940-01-572-4234 — this item is cataloged by the U.S. Government under National Stock Number 4940-01-572-4234. Primary manufacturer part number: 6521.
Features
  • Leak Detector,refrigerant Gas — FSC 4940
  • 1 verified cross-reference
  • Primary manufacturer: Spx Corporation Dba O T C Tool & Equip Division Div Spx Corp - Kent-Moore/otc Divisons
Applications
  • Maintenance depot operations
  • Field repair and servicing
  • Vehicle maintenance facilities
General Description

The Leak Detector,refrigerant Gas, cataloged under National Stock Number 4940-01-572-4234, is classified within Federal Supply Class 4940 (No Item Name Available) of the Maintenance and Repair Shop Equipment group. The primary manufacturer of record is Spx Corporation Dba O T C Tool & Equip Division Div Spx Corp - Kent-Moore/otc Divisons. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4940-01-572-4234
Primary Part Number6521
Item NameLeak Detector,refrigerant Gas
FSC / FSG4940 / 49 — No Item Name Available
ManufacturerSpx Corporation Dba O T C Tool & Equip Division Div Spx Corp - Kent-Moore/otc Divisons
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-014-61576521-101A INTERCHANGEABLE
Gasket
Kirkhill Inc Div Kirkhill Inc, Haskon Division
5935-00-068-4622 INTERCHANGEABLE
Connector,plug,electrical
5330-00-494-9966 INTERCHANGEABLE
Seal,plain Encased
5960-00-810-3594 INTERCHANGEABLE
Electron Tube
3040-00-918-84476521 INTERCHANGEABLE
Shaft,pilot
Michigan Dynamics Inc
4820-01-011-92478Z-V8LR-B(P) INTERCHANGEABLE
Valve,globe
Parker-Hannifin Corp Div Instrumentation Products Division
3030-01-069-16546521 INTERCHANGEABLE
Belt,v
Gates Corporation
5945-01-272-6192231B233DQP1 INTERCHANGEABLE
Relay,hybrid
General Electric Company Dba Ge
5210-01-435-69456521 INTERCHANGEABLE
Dividers,mechanics'
Central Tools, Inc.
5985-01-524-57726521 INTERCHANGEABLE
Antenna Subassembly
Spectrum Control Inc Div Weinschel
Cross-Reference Index
Part NumberManufacturer
6521 PRIMARY Spx Corporation Dba O T C Tool & Equip Division Div Spx Corp - Kent-Moore/otc Divisons (USA)
Related Parts
5330-00-014-6157INTERCHANGEABLE
GASKET
6521-101A
5935-00-068-4622INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
5330-00-494-9966INTERCHANGEABLE
SEAL,PLAIN ENCASED
5960-00-810-3594INTERCHANGEABLE
ELECTRON TUBE
3040-00-918-8447INTERCHANGEABLE
SHAFT,PILOT
6521
4820-01-011-9247INTERCHANGEABLE
VALVE,GLOBE
8Z-V8LR-B(P)
3030-01-069-1654INTERCHANGEABLE
BELT,V
6521
5945-01-272-6192INTERCHANGEABLE
RELAY,HYBRID
231B233DQP1
5210-01-435-6945INTERCHANGEABLE
DIVIDERS,MECHANICS'
6521
5985-01-524-5772INTERCHANGEABLE
ANTENNA SUBASSEMBLY
6521
6515-01-560-6983INTERCHANGEABLE
AIRWAY,NASOPHARYNGEAL
123128
4730-01-649-9025INTERCHANGEABLE
ADAPTER BUSHING
652-1

Frequently Asked Questions

What is NSN 4940-01-572-4234?

NSN 4940-01-572-4234 is a Leak Detector,refrigerant Gas, manufactured by Spx Corporation Dba O T C Tool & Equip Division Div Spx Corp - Kent-Moore/otc Divisons, classified under FSC 4940 (No Item Name Available). Status: active.

What are the part numbers for NSN 4940-01-572-4234?

NSN 4940-01-572-4234 has 1 cross-referenced part number: 6521 (Spx Corporation Dba O T C Tool & Equip Division Div Spx Corp - Kent-Moore/otc Divisons).

What NSN replaces 4940-01-572-4234?

There are 12 known substitutes for 4940-01-572-4234: 5330-00-014-6157, 5935-00-068-4622, 5330-00-494-9966 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6521?

Key specifications for 6521: Part Name Assigned by Controlling Agency: LEAK TAMER PLUS EVAP; End Item Identification: DOMESTIC AND IMPORT CARS AND LIGHT TRUCKS; Special Features: DIMENSIONS: 23IN X 18IN X 9 1/2IN; PRODUCT WEIGHT: 17LBS LBS. 3 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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