PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FSM121Socket,socket Wrench

Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc · NSN 5120-01-348-9115 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-348-9115 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-348-9115. Primary manufacturer part number: FSM121.
Features
  • Socket,socket Wrench — FSC 5120
  • Drive Surface Size: 0.375 INCHES NOMINAL SINGLE END IN
  • Features Provided: MANUAL TOOL
  • Surface Treatment: CHROMIUM OVERALL
  • Wrenching Surface Size: 12.0 MILLIMETERS NOMINAL SINGLE END MM
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • Style Designator: INTERNAL-INTERNAL
  • Wrenching Surface Shape: 6 POINT SINGLE END INTERNAL
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-01-348-9115, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-01-348-9115
Primary Part NumberFSM121
Item NameSocket,socket Wrench
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerIdsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
StatusCANCELLED
Drive Surface Size0.375 INCHES NOMINAL SINGLE END IN
Features ProvidedMANUAL TOOL
Surface TreatmentCHROMIUM OVERALL
Wrenching Surface Size12.0 MILLIMETERS NOMINAL SINGLE END MM
Drive End ShapeSQUARE SINGLE END INTERNAL
Style DesignatorINTERNAL-INTERNAL
Wrenching Surface Shape6 POINT SINGLE END INTERNAL
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
2530-00-770-9862380-12 INTERCHANGEABLE
Brake Lining Kit
Goodrich Corporation Div Collins Aerospace, Landing Systems (wheels & Brakes)
5330-01-021-2841 INTERCHANGEABLE
Felt,special
5210-01-050-2234380-12 INTERCHANGEABLE
Straightedge
L.s. Starrett Company (the) Div Tool Division
6350-01-268-51502D62088PK-001 INTERCHANGEABLE
Alarm,differential Pressure
Northrop Grumman Systems Corporation Div Marine Systems
6640-01-511-5329 INTERCHANGEABLE
Tray,utility,laboratory
6240-01-541-700938012 INTERCHANGEABLE
Lamp Assembly
Rsl Fiber Systems Llc
Cross-Reference Index
Part NumberManufacturer
93609246 Msc Industrial Direct Co., Inc. (USA)
12112 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
FSM121 PRIMARY Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
38-012 Armstrong Bros Tool Co (USA)
ARM-38012B J and L Industrial Supply Co Inc (USA)
38-012 Apex Tool Group, Llc Dba Nicholson (USA)
38-012 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
12112 Apex Tool Group, Llc Dba Nicholson (USA)
12112 Easco Hand Tools Inc (USA)
456720017108 Ncb Hungary (honvedsegi Egyseges Termekkod) (HUN)
Related Parts
2530-00-770-9862INTERCHANGEABLE
BRAKE LINING KIT
380-12
5330-01-021-2841INTERCHANGEABLE
FELT,SPECIAL
5210-01-050-2234INTERCHANGEABLE
STRAIGHTEDGE
380-12
6350-01-268-5150INTERCHANGEABLE
ALARM,DIFFERENTIAL PRESSURE
2D62088PK-001
6640-01-511-5329INTERCHANGEABLE
TRAY,UTILITY,LABORATORY
6240-01-541-7009INTERCHANGEABLE
LAMP ASSEMBLY
38012

Frequently Asked Questions

What is NSN 5120-01-348-9115?

NSN 5120-01-348-9115 is a Socket,socket Wrench, manufactured by Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-01-348-9115?

NSN 5120-01-348-9115 has 10 cross-referenced part numbers: 93609246 (Msc Industrial Direct Co., Inc.), 12112 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.), FSM121 (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc), 38-012 (Armstrong Bros Tool Co), ARM-38012B (J and L Industrial Supply Co Inc) and 5 more.

What NSN replaces 5120-01-348-9115?

There are 6 known substitutes for 5120-01-348-9115: 2530-00-770-9862, 5330-01-021-2841, 5210-01-050-2234 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FSM121?

Key specifications for FSM121: Drive Surface Size: 0.375 INCHES NOMINAL SINGLE END IN; Features Provided: MANUAL TOOL; Surface Treatment: CHROMIUM OVERALL; Wrenching Surface Size: 12.0 MILLIMETERS NOMINAL SINGLE END MM. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-01-348-9115 still in active supply?

NSN 5120-01-348-9115 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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