PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5120-00-198-5403Key,socket Head Screw

General Services Administration Federal Supply Service · NSN 5120-00-198-5403 · FSC 5120 · No Item Name Available
Verified by PartsTable
Features
  • Key,socket Head Screw — FSC 5120
  • Long Arm Length: 14.156 INCHES MINIMUM AND 14.344 INCHES MAXIMUM IN
  • Wrenching Surface Size: 1.000 INCHES NOMINAL BOTH ENDS IN
  • Features Provided: LONG SERIES
  • Material: STEEL OVERALL
  • Wrenching Surface Shape: HEXAGON BOTH ENDS EXTERNAL
  • Style Designator: L-HANDLE
  • Short Arm Length: 2.531 INCHES MINIMUM AND 2.719 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Key,socket Head Screw, cataloged under National Stock Number 5120-00-198-5403, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is General Services Administration Federal Supply Service. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-00-198-5403
Primary Part Number5120-00-198-5403
Item NameKey,socket Head Screw
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerGeneral Services Administration Federal Supply Service
StatusCANCELLED
Long Arm Length14.156 INCHES MINIMUM AND 14.344 INCHES MAXIMUM IN
Wrenching Surface Size1.000 INCHES NOMINAL BOTH ENDS IN
Features ProvidedLONG SERIES
MaterialSTEEL OVERALL
Wrenching Surface ShapeHEXAGON BOTH ENDS EXTERNAL
Style DesignatorL-HANDLE
Short Arm Length2.531 INCHES MINIMUM AND 2.719 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 9
6240-00-155-8669 INTERCHANGEABLE
Lamp,incandescent
5940-00-168-34401771158 INTERCHANGEABLE
Terminal Board
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5210-00-178-4227 INTERCHANGEABLE
Tape,measuring
5920-00-280-9320 INTERCHANGEABLE
Fuse,cartridge
5360-00-660-1042100L INTERCHANGEABLE
Spring,helical,compression
Asrc Federal Facilities Logistics, Llc
5962-01-215-17391048194-1 INTERCHANGEABLE
Microcircuit,digital
Raytheon Company Dba Raytheon Co
4730-01-223-0899 INTERCHANGEABLE
Coupling,pipe
5996-01-234-9156 INTERCHANGEABLE
Amplifier,radio Frequency
5120-01-437-7925 INTERCHANGEABLE
Key,socket Head Screw
Cross-Reference Index
Part NumberManufacturer
GGG-K-275 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
58034 Apex Tool Group, Llc Dba Nicholson (USA)
GGG-K-275 TY1CL2 General Services Administration Federal Supply Service (USA)
100L Maddock and Co Div of the Gage Co (USA)
58034 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
A-A-2473 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
5120-00-198-5403 PRIMARY General Services Administration Federal Supply Service (USA)
0198 3906 Blackwood J. Blackwood & Son Pty Ltd (AUS)
Related Parts
6240-00-155-8669INTERCHANGEABLE
LAMP,INCANDESCENT
5940-00-168-3440INTERCHANGEABLE
TERMINAL BOARD
1771158
5210-00-178-4227INTERCHANGEABLE
TAPE,MEASURING
5920-00-280-9320INTERCHANGEABLE
FUSE,CARTRIDGE
5360-00-660-1042INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
100L
5962-01-215-1739INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
1048194-1
4730-01-223-0899INTERCHANGEABLE
COUPLING,PIPE
5996-01-234-9156INTERCHANGEABLE
AMPLIFIER,RADIO FREQUENCY
5120-01-437-7925INTERCHANGEABLE
KEY,SOCKET HEAD SCREW

Frequently Asked Questions

What is NSN 5120-00-198-5403?

NSN 5120-00-198-5403 is a Key,socket Head Screw, manufactured by General Services Administration Federal Supply Service, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-198-5403?

NSN 5120-00-198-5403 has 8 cross-referenced part numbers: GGG-K-275 (Federal Specifications Promulgated by General Services Administration Washington DC), 58034 (Apex Tool Group, Llc Dba Nicholson), GGG-K-275 TY1CL2 (General Services Administration Federal Supply Service), 100L (Maddock and Co Div of the Gage Co), 58034 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.) and 3 more.

What NSN replaces 5120-00-198-5403?

There are 9 known substitutes for 5120-00-198-5403: 6240-00-155-8669, 5940-00-168-3440, 5210-00-178-4227 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5120-00-198-5403?

Key specifications for 5120-00-198-5403: Overall Length: 15.156 INCHES MINIMUM AND 15.344 INCHES MAXIMUM IN; Long Arm Length: 14.156 INCHES MINIMUM AND 14.344 INCHES MAXIMUM IN; Wrenching Surface Size: 1.000 INCHES NOMINAL BOTH ENDS IN; Features Provided: LONG SERIES. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-198-5403 still in active supply?

NSN 5120-00-198-5403 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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