PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9920-6-6Installation Tool,f

Southco Inc · NSN 5120-00-391-0123 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-391-0123 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-391-0123. Primary manufacturer part number: 9920-6-6.
Features
  • Installation Tool,f — FSC 5120
  • 3 verified cross-references
  • Primary manufacturer: Southco Inc
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Installation Tool,f, cataloged under National Stock Number 5120-00-391-0123, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Southco Inc. This item has 3 commercial cross-references 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 NameInstallation Tool,f
FSC / FSG5120 — No Item Name Available (FSG 51)
ManufacturersSouthco Inc (CAGE 72794)
Technical Specifications
ParameterValue
NSN5120-00-391-0123
Primary Part Number9920-6-6
Item NameInstallation Tool,f
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerSouthco Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
9905-00-050-123199-2066 INTERCHANGEABLE
Plate,identification
Rtx Corporation Div Pratt & Whitney
3110-00-156-1712 INTERCHANGEABLE
Bearing,ball,thrust
2330-00-200-1884 INTERCHANGEABLE
Semitrailer,tank
5345-00-243-608261463686080 INTERCHANGEABLE
Stone,sharpening
Saint-Gobain Abrasives Inc
3120-00-426-0545F6 INTERCHANGEABLE
Bearing,sleeve
Superior Equipment Co Buckeye Div
3455-00-542-40191741-0187 INTERCHANGEABLE
Cutter,milling,end
New York Twist Drill Inc
5961-00-688-6316 INTERCHANGEABLE
Semiconductor Device,diode
5999-01-023-0216E50 INTERCHANGEABLE
Heater,thermal Release
Siemens Energy and Automation Inc Siemens Furnas Controls Div
6130-01-047-4324MODEL 355 INTERCHANGEABLE
Power Supply
Eldec Aerospace Corp
4510-01-063-3767F6 INTERCHANGEABLE
Holder,valve Seat,auxiliary
Coyne & Delany Company Dba Delany Products Div Delany Products
Cross-Reference Index
Part NumberManufacturer
9920-6-6 PRIMARY Southco Inc (USA)
TTF6 Southco Inc (USA)
F6 Southco Inc (USA)
Related Parts
9905-00-050-1231INTERCHANGEABLE
PLATE,IDENTIFICATION
99-2066
3110-00-156-1712INTERCHANGEABLE
BEARING,BALL,THRUST
2330-00-200-1884INTERCHANGEABLE
SEMITRAILER,TANK
5345-00-243-6082INTERCHANGEABLE
STONE,SHARPENING
61463686080
3120-00-426-0545INTERCHANGEABLE
BEARING,SLEEVE
F6
3455-00-542-4019INTERCHANGEABLE
CUTTER,MILLING,END
1741-0187
5961-00-688-6316INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5999-01-023-0216INTERCHANGEABLE
HEATER,THERMAL RELEASE
E50
6130-01-047-4324INTERCHANGEABLE
POWER SUPPLY
MODEL 355
4510-01-063-3767INTERCHANGEABLE
HOLDER,VALVE SEAT,AUXILIARY
F6
6130-01-164-1266INTERCHANGEABLE
POWER SUPPLY
F-6
5315-01-315-0036INTERCHANGEABLE
PIN,LOCK,DETENT

Frequently Asked Questions

What is NSN 5120-00-391-0123?

NSN 5120-00-391-0123 is a Installation Tool,f, manufactured by Southco Inc, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-00-391-0123?

NSN 5120-00-391-0123 has 3 cross-referenced part numbers: 9920-6-6 (Southco Inc), TTF6 (Southco Inc), F6 (Southco Inc).

What NSN replaces 5120-00-391-0123?

There are 12 known substitutes for 5120-00-391-0123: 9905-00-050-1231, 3110-00-156-1712, 2330-00-200-1884 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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