PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

GGG-K-275Key,socket Head Screw

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5120-00-240-5268 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-240-5268 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-240-5268. Primary manufacturer part number: GGG-K-275.
Features
  • Key,socket Head Screw — FSC 5120
  • Features Provided: SHORT SERIES
  • Environmental Attribute Code: PLASTICS REMOVAL IN THE MARINE ENVIRONMENT (PRIME) PRODUCT
  • Specification/standard Data: 05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Wrenching Surface Shape: HEXAGON BOTH ENDS EXTERNAL
  • Long Arm Length: 5.656 INCHES MINIMUM AND 5.844 INCHES MAXIMUM IN
  • Style Designator: L-HANDLE
  • Material: STEEL OVERALL
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 5120-00-240-5268, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 commercial cross-references from 12 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-00-240-5268
Primary Part NumberGGG-K-275
Item NameKey,socket Head Screw
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusCANCELLED
Features ProvidedSHORT SERIES
Environmental Attribute CodePLASTICS REMOVAL IN THE MARINE ENVIRONMENT (PRIME) PRODUCT
Specification/standard Data05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Wrenching Surface ShapeHEXAGON BOTH ENDS EXTERNAL
Long Arm Length5.656 INCHES MINIMUM AND 5.844 INCHES MAXIMUM IN
Style DesignatorL-HANDLE
MaterialSTEEL OVERALL
Wrenching Surface Size0.563 INCHES NOMINAL BOTH ENDS IN
Short Arm Length1.656 INCHES MINIMUM AND 1.844 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5945-00-012-4734380-0016-001 INTERCHANGEABLE
Relay,electromagnetic
Honeywell International Inc. Dba Honeywell Div Aerospace ? Redmond Commercial
5905-00-104-8336 INTERCHANGEABLE
Resistor,fixed,composition
5310-00-369-5702511018 INTERCHANGEABLE
Washer,key
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
5330-00-482-69010757034 INTERCHANGEABLE
Packing,preformed
Akron Brass Company
3439-00-918-792146059 INTERCHANGEABLE
Tweezers,anti-Wicking
Ripley Co Inc
4730-01-103-9242511018 INTERCHANGEABLE
Fitting
B/e Aerospace, Inc. Dba Interturbine Div Oxygen & PSU Systems
5330-01-107-9268USLB0015 INTERCHANGEABLE
Gasket Kit
Perkins Engines Inc
4730-01-331-7352 INTERCHANGEABLE
Elbow,pipe
3040-01-367-13086801-7 INTERCHANGEABLE
Connecting Link,rigid
Tyee Aircraft Inc Div Tyee Aircraft
5120-01-395-5439 INTERCHANGEABLE
Key,socket Head Screw
Cross-Reference Index
Part NumberManufacturer
GGG-K-275 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
0198 1704 Blackwood J. Blackwood & Son Pty Ltd (AUS)
511018 Brighton-Best International (au) Pty Ltd (AUS)
GGG-K-275 TY1CL1 General Services Administration Federal Supply Service (USA)
57034 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
57034 Apex Tool Group, Llc Dba Nicholson (USA)
20733-12 C Systems Llc Dba Craig Systems Dba Eastern Technologies (USA)
41W2458 General Stores Supply Office (USA)
B18.3 The American Society of Mechanical Engineers (USA)
A-A-2473 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
AW18 Sna Germany Gmbh (DEU)
68017 Allen Mfg Co Sub of Chicago Pneumatic Tool Co (USA)
Related Parts
5945-00-012-4734INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
380-0016-001
5905-00-104-8336INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION
5310-00-369-5702INTERCHANGEABLE
WASHER,KEY
511018
5330-00-482-6901INTERCHANGEABLE
PACKING,PREFORMED
0757034
3439-00-918-7921INTERCHANGEABLE
TWEEZERS,ANTI-WICKING
46059
4730-01-103-9242INTERCHANGEABLE
FITTING
511018
5330-01-107-9268INTERCHANGEABLE
GASKET KIT
USLB0015
4730-01-331-7352INTERCHANGEABLE
ELBOW,PIPE
3040-01-367-1308INTERCHANGEABLE
CONNECTING LINK,RIGID
6801-7
5120-01-395-5439INTERCHANGEABLE
KEY,SOCKET HEAD SCREW
5120-01-428-8008INTERCHANGEABLE
KEY,SOCKET HEAD SCREW
5120-01-437-7916INTERCHANGEABLE
KEY,SOCKET HEAD SCREW

Frequently Asked Questions

What is NSN 5120-00-240-5268?

NSN 5120-00-240-5268 is a Key,socket Head Screw, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-240-5268?

NSN 5120-00-240-5268 has 12 cross-referenced part numbers: GGG-K-275 (Federal Specifications Promulgated by General Services Administration Washington DC), 0198 1704 (Blackwood J. Blackwood & Son Pty Ltd), 511018 (Brighton-Best International (au) Pty Ltd), GGG-K-275 TY1CL1 (General Services Administration Federal Supply Service), 57034 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.) and 7 more.

What NSN replaces 5120-00-240-5268?

There are 12 known substitutes for 5120-00-240-5268: 5945-00-012-4734, 5905-00-104-8336, 5310-00-369-5702 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of GGG-K-275?

Key specifications for GGG-K-275: Features Provided: SHORT SERIES; Environmental Attribute Code: PLASTICS REMOVAL IN THE MARINE ENVIRONMENT (PRIME) PRODUCT; Specification/standard Data: 05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Wrenching Surface Shape: HEXAGON BOTH ENDS EXTERNAL. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-240-5268 still in active supply?

NSN 5120-00-240-5268 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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