PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

GGG-K-275 TY1CL1Key,socket Head Screw

General Services Administration Federal Supply Service · NSN 5120-00-198-5387 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-198-5387 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-198-5387. Primary manufacturer part number: GGG-K-275 TY1CL1.
Features
  • Key,socket Head Screw — FSC 5120
  • Features Provided: SHORT SERIES
  • Style Designator: L-HANDLE
  • Wrenching Surface Shape: HEXAGON BOTH ENDS EXTERNAL
  • Wrenching Surface Size: 1.000 INCHES NOMINAL BOTH ENDS IN
  • Material: STEEL OVERALL
  • Specification/standard Data: 05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • 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 5120-00-198-5387, 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 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 9 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-00-198-5387
Primary Part NumberGGG-K-275 TY1CL1
Item NameKey,socket Head Screw
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerGeneral Services Administration Federal Supply Service
StatusACTIVE
Features ProvidedSHORT SERIES
Style DesignatorL-HANDLE
Wrenching Surface ShapeHEXAGON BOTH ENDS EXTERNAL
Wrenching Surface Size1.000 INCHES NOMINAL BOTH ENDS IN
MaterialSTEEL OVERALL
Specification/standard Data05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Short Arm Length2.531 INCHES MINIMUM AND 2.719 INCHES MAXIMUM IN
Long Arm Length9.156 INCHES MINIMUM AND 9.344 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
3460-00-203-996757-042 INTERCHANGEABLE
Grinding Machine,machine Tool at
Dumore Corporation
4510-00-317-3800 INTERCHANGEABLE
Tailpiece,waste Drain
2520-01-004-477268021 INTERCHANGEABLE
Case,differential
Dana Commercial Vehicle Products, Llc
5841-01-190-290268021 INTERCHANGEABLE
Plate,mounting,electronic Equipm
Msp Aviation, Inc. Dba Msp Maufacturing
5961-01-395-76135704.2 INTERCHANGEABLE
Semiconductor Devices,unitized
Altech Corporation
7510-01-399-11537000029845 INTERCHANGEABLE
Tab,signal
3m Company
Cross-Reference Index
Part NumberManufacturer
GGG-K-275 TY1CL1 General Services Administration Federal Supply Service (USA)
57042 Apex Tool Group, Llc Dba Nicholson (USA)
A-A-2473 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
GGG-K-275 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
57042 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
68021 Allen Mfg Co Sub of Chicago Pneumatic Tool Co (USA)
12221 Bondhus Corp (USA)
B18.3 The American Society of Mechanical Engineers (USA)
0198 2101 Blackwood J. Blackwood & Son Pty Ltd (AUS)
Related Parts
3460-00-203-9967INTERCHANGEABLE
GRINDING MACHINE,MACHINE TOOL AT
57-042
4510-00-317-3800INTERCHANGEABLE
TAILPIECE,WASTE DRAIN
2520-01-004-4772INTERCHANGEABLE
CASE,DIFFERENTIAL
68021
5841-01-190-2902INTERCHANGEABLE
PLATE,MOUNTING,ELECTRONIC EQUIPM
68021
5961-01-395-7613INTERCHANGEABLE
SEMICONDUCTOR DEVICES,UNITIZED
5704.2
7510-01-399-1153INTERCHANGEABLE
TAB,SIGNAL
7000029845

Frequently Asked Questions

What is NSN 5120-00-198-5387?

NSN 5120-00-198-5387 is a Key,socket Head Screw, manufactured by General Services Administration Federal Supply Service, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-00-198-5387?

NSN 5120-00-198-5387 has 9 cross-referenced part numbers: GGG-K-275 TY1CL1 (General Services Administration Federal Supply Service), 57042 (Apex Tool Group, Llc Dba Nicholson), A-A-2473 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC), GGG-K-275 (Federal Specifications Promulgated by General Services Administration Washington DC), 57042 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.) and 4 more.

What NSN replaces 5120-00-198-5387?

There are 6 known substitutes for 5120-00-198-5387: 3460-00-203-9967, 4510-00-317-3800, 2520-01-004-4772 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of GGG-K-275 TY1CL1?

Key specifications for GGG-K-275 TY1CL1: Overall Length: 10.153 INCHES MINIMUM AND 10.344 INCHES MAXIMUM IN; Features Provided: SHORT SERIES; Style Designator: L-HANDLE; Wrenching Surface Shape: HEXAGON BOTH ENDS EXTERNAL. 9 total characteristics are documented in the Federal Logistics Information System.

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