PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SW421Socket,socket Wrench

Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc · NSN 5120-01-428-4768 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-428-4768 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-428-4768. Primary manufacturer part number: SW421.
Features
  • Socket,socket Wrench — FSC 5120
  • Drive End Shape: SQUARE SINGLE END INTERNAL
  • Surface Treatment: CHROMIUM OVERALL
  • Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL
  • Features Provided: MANUAL TOOL
  • Wrenching Surface Size: 1.312 INCHES NOMINAL SINGLE END IN
  • Nondefinitive Spec/std Data: 1 TYPE AND 1 CLASS AND A STYLE
  • Drive Surface Size: 0.500 INCHES NOMINAL SINGLE END IN
Applications
  • Applications requiring Steel Overall construction
General Description

The Socket,socket Wrench, cataloged under National Stock Number 5120-01-428-4768, 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 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 7 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
NSN5120-01-428-4768
Primary Part NumberSW421
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 End ShapeSQUARE SINGLE END INTERNAL
Surface TreatmentCHROMIUM OVERALL
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Features ProvidedMANUAL TOOL
Wrenching Surface Size1.312 INCHES NOMINAL SINGLE END IN
Nondefinitive Spec/std Data1 TYPE AND 1 CLASS AND A STYLE
Drive Surface Size0.500 INCHES NOMINAL SINGLE END IN
Specification/standard Data0U583-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MaterialSTEEL OVERALL
Style DesignatorINTERNAL-INTERNAL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5305-00-022-8354 INTERCHANGEABLE
Screw,assembled Washer
5360-00-057-2400 INTERCHANGEABLE
Spring,helical,compression
5935-00-067-5721SKT111PCGREEN INTERCHANGEABLE
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5940-00-193-021712Z400PC21 INTERCHANGEABLE
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Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5305-00-349-81814142 INTERCHANGEABLE
Screw,click
Wakmann Watch Company Inc
5930-00-468-4085 INTERCHANGEABLE
Switch,slide
2805-00-488-8489334218C3 INTERCHANGEABLE
Piston,internal Combustion Engin
Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/
6625-00-715-8262 INTERCHANGEABLE
Resistor Assembly,thermistor
2510-00-769-744218459 INTERCHANGEABLE
Shock Absorber,direct Action
Tenneco Inc
5940-00-983-6099672 GP 04 INTERCHANGEABLE
Terminal Board
Regal Beloit America, Inc
Cross-Reference Index
Part NumberManufacturer
SW421 PRIMARY Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
J5442 The Stanley Works Dba Stanley Proto (USA)
4142 Wright Tool Company, Llc (USA)
FRS SW421 Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
AS954 Sae International Dba Sae International (USA)
1AM82 W.w. Grainger, Inc. Div Government Sales Division (USA)
AS954 Society of Automotive Engineers Inc (USA)
5442 The Stanley Works Dba Stanley Proto (USA)
AS954 TY1CL1STA General Services Administration Federal Supply Service (USA)
Related Parts
5305-00-022-8354INTERCHANGEABLE
SCREW,ASSEMBLED WASHER
5360-00-057-2400INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
5935-00-067-5721INTERCHANGEABLE
JACK,TIP
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5940-00-193-0217INTERCHANGEABLE
TERMINAL BOARD
12Z400PC21
5305-00-349-8181INTERCHANGEABLE
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5930-00-468-4085INTERCHANGEABLE
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2805-00-488-8489INTERCHANGEABLE
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6625-00-715-8262INTERCHANGEABLE
RESISTOR ASSEMBLY,THERMISTOR
2510-00-769-7442INTERCHANGEABLE
SHOCK ABSORBER,DIRECT ACTION
18459
5940-00-983-6099INTERCHANGEABLE
TERMINAL BOARD
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GAGE,PRESSURE,DIAL INDICATING
J5442
4820-01-197-8992INTERCHANGEABLE
STEM,FLUID VALVE
NB22709942

Frequently Asked Questions

What is NSN 5120-01-428-4768?

NSN 5120-01-428-4768 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 5120-01-428-4768?

NSN 5120-01-428-4768 has 9 cross-referenced part numbers: SW421 (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc), J5442 (The Stanley Works Dba Stanley Proto), 4142 (Wright Tool Company, Llc), FRS SW421 (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc), AS954 (Sae International Dba Sae International) and 4 more.

What NSN replaces 5120-01-428-4768?

There are 12 known substitutes for 5120-01-428-4768: 5305-00-022-8354, 5360-00-057-2400, 5935-00-067-5721 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SW421?

Key specifications for SW421: Drive End Shape: SQUARE SINGLE END INTERNAL; Surface Treatment: CHROMIUM OVERALL; Wrenching Surface Shape: 12 POINT SINGLE END INTERNAL; Special Features: STANDARD LENGTH. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-01-428-4768 still in active supply?

NSN 5120-01-428-4768 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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