PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66-3Wrench,special

Custom Control Sensors, Llc · NSN 5120-00-876-7979 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-876-7979 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-876-7979. Primary manufacturer part number: 66-3.
Features
  • Wrench,special — FSC 5120
  • 1 verified cross-reference
  • Primary manufacturer: Custom Control Sensors, Llc
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Wrench,special, cataloged under National Stock Number 5120-00-876-7979, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Custom Control Sensors, Llc. 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.

Catalog Facts
Item NameWrench,special
FSC / FSG5120 — No Item Name Available (FSG 51)
ManufacturersCustom Control Sensors, Llc (CAGE 09049)
Technical Specifications
ParameterValue
NSN5120-00-876-7979
Primary Part Number66-3
Item NameWrench,special
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerCustom Control Sensors, Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5340-00-066-1457350.663.012 INTERCHANGEABLE
Clamp,bridge
Weil Pump Co Inc
5920-00-069-7614663 INTERCHANGEABLE
Adapter,fuse
Cooper Bussmann, Llc Dba Cooper Industries
3110-00-100-0670663 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
6625-00-149-6298 INTERCHANGEABLE
Multimeter
5975-00-194-8870 INTERCHANGEABLE
Junction Box
4925-00-344-798166346PC90 INTERCHANGEABLE
Bolt Assy,eye
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
1650-00-347-1184 INTERCHANGEABLE
Cylinder Assembly,actuating,line
4910-00-351-9731682 INTERCHANGEABLE
Grinding Machine,valve Face
Sioux Tools Inc
5910-00-493-6471 INTERCHANGEABLE
Capacitor,fixed,plastic Dielectr
5210-00-517-8096 INTERCHANGEABLE
Gage,thickness
Cross-Reference Index
Part NumberManufacturer
66-3 PRIMARY Custom Control Sensors, Llc (USA)
Related Parts
5340-00-066-1457INTERCHANGEABLE
CLAMP,BRIDGE
350.663.012
5920-00-069-7614INTERCHANGEABLE
ADAPTER,FUSE
663
3110-00-100-0670INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
663
6625-00-149-6298INTERCHANGEABLE
MULTIMETER
5975-00-194-8870INTERCHANGEABLE
JUNCTION BOX
4925-00-344-7981INTERCHANGEABLE
BOLT ASSY,EYE
66346PC90
1650-00-347-1184INTERCHANGEABLE
CYLINDER ASSEMBLY,ACTUATING,LINE
4910-00-351-9731INTERCHANGEABLE
GRINDING MACHINE,VALVE FACE
682
5910-00-493-6471INTERCHANGEABLE
CAPACITOR,FIXED,PLASTIC DIELECTR
5210-00-517-8096INTERCHANGEABLE
GAGE,THICKNESS
5330-00-716-1502INTERCHANGEABLE
SEAL,PLAIN ENCASED
43500
1660-00-799-5231INTERCHANGEABLE
CONNECTOR,OXYGEN LI
663

Frequently Asked Questions

What is NSN 5120-00-876-7979?

NSN 5120-00-876-7979 is a Wrench,special, manufactured by Custom Control Sensors, Llc, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-00-876-7979?

NSN 5120-00-876-7979 has 1 cross-referenced part number: 66-3 (Custom Control Sensors, Llc).

What NSN replaces 5120-00-876-7979?

There are 12 known substitutes for 5120-00-876-7979: 5340-00-066-1457, 5920-00-069-7614, 3110-00-100-0670 and 9 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com