PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5.5120 X DISCDisc,master

Mahr Inc · NSN 5220-00-188-3757 · FSC 5220 · No Item Name Available
Verified by PartsTable
NSN 5220-00-188-3757 — this item is cataloged by the U.S. Government under National Stock Number 5220-00-188-3757. Primary manufacturer part number: 5.5120 X DISC.
Features
  • Disc,master — FSC 5220
  • 3 verified cross-references
  • Primary manufacturer: Mahr Inc
Applications
  • Quality assurance and inspection
  • Precision measurement and calibration
  • Laboratory and test equipment
General Description

The Disc,master, cataloged under National Stock Number 5220-00-188-3757, is classified within Federal Supply Class 5220 (No Item Name Available) of the Measuring Tools group. The primary manufacturer of record is Mahr Inc. This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameDisc,master
FSC / FSG5220 — No Item Name Available (FSG 52)
ManufacturersMahr Inc (CAGE 21938)
Technical Specifications
ParameterValue
NSN5220-00-188-3757
Primary Part Number5.5120 X DISC
Item NameDisc,master
FSC / FSG5220 / 52 — No Item Name Available
ManufacturerMahr Inc
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
5330-00-154-829833S44150-5040 INTERCHANGEABLE
Seal,plain Encased
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
2990-00-287-0336FCM07-0068 INTERCHANGEABLE
Arrester,spark Exhaust
Donaldson Company, Inc.
6685-00-426-6704J8054AE-001 INTERCHANGEABLE
Gage,pressure,dial Indicating
Bellofram Corporation
3820-00-836-962455120 INTERCHANGEABLE
Housing,right Angle
Terex Reedrill Dba Reedrill Texoma Div Terex Mining
2530-01-347-478661-302 INTERCHANGEABLE
Weight,wheel Balancing
Myers Tire Supply Distribution Inc Div Akron Branch
4820-01-671-113855120 INTERCHANGEABLE
Valve,bleeder,hydraulic System
Malabar
6515-01-688-638855-120 INTERCHANGEABLE
Splint Set,universa
Combat Medical Systems Llc
Cross-Reference Index
Part NumberManufacturer
5-5120 Mahr Inc (USA)
5-5120X Mahr Inc (USA)
5.5120 X DISC PRIMARY Mahr Inc (USA)
Related Parts
5330-00-154-8298INTERCHANGEABLE
SEAL,PLAIN ENCASED
33S44150-5040
2990-00-287-0336INTERCHANGEABLE
ARRESTER,SPARK EXHAUST
FCM07-0068
6685-00-426-6704INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
J8054AE-001
3820-00-836-9624INTERCHANGEABLE
HOUSING,RIGHT ANGLE
55120
2530-01-347-4786INTERCHANGEABLE
WEIGHT,WHEEL BALANCING
61-302
4820-01-671-1138INTERCHANGEABLE
VALVE,BLEEDER,HYDRAULIC SYSTEM
55120
6515-01-688-6388INTERCHANGEABLE
SPLINT SET,UNIVERSA
55-120

Frequently Asked Questions

What is NSN 5220-00-188-3757?

NSN 5220-00-188-3757 is a Disc,master, manufactured by Mahr Inc, classified under FSC 5220 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5220-00-188-3757?

NSN 5220-00-188-3757 has 3 cross-referenced part numbers: 5-5120 (Mahr Inc), 5-5120X (Mahr Inc), 5.5120 X DISC (Mahr Inc).

What NSN replaces 5220-00-188-3757?

There are 7 known substitutes for 5220-00-188-3757: 5330-00-154-8298, 2990-00-287-0336, 6685-00-426-6704 and 4 more. Verify interchangeability with system specifications before substitution.

Is NSN 5220-00-188-3757 still in active supply?

NSN 5220-00-188-3757 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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