PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

27-379Wrench,box

Armstrong Bros Tool Co · NSN 5120-00-224-3140 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-224-3140 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-224-3140. Primary manufacturer part number: 27-379.
Features
  • Wrench,box — FSC 5120
  • Wrenching Surface Size: 0.625 INCHES NOMINAL SECOND END IN
  • Style Designator: DEEP ANGULAR OFFSET DOUBLE HEAD
  • Wrenching Surface Size: 0.562 INCHES NOMINAL FIRST END IN
  • Material: STEEL OVERALL
  • Nondefinitive Spec/std Data: 2 TYPE AND 3 CLASS AND A STYLE
  • Wrenching Surface Shape: 12 POINT BOTH ENDS INTERNAL
  • Wrenching End Offset Angle: 40.0 DEGREES MINIMUM AND 65.0 DEGREES MAXIMUM
Applications
  • Applications requiring Steel Overall construction
General Description

The Wrench,box, cataloged under National Stock Number 5120-00-224-3140, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Armstrong Bros Tool Co. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 commercial cross-references from 9 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
NSN5120-00-224-3140
Primary Part Number27-379
Item NameWrench,box
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerArmstrong Bros Tool Co
StatusCANCELLED
Wrenching Surface Size0.625 INCHES NOMINAL SECOND END IN
Style DesignatorDEEP ANGULAR OFFSET DOUBLE HEAD
Wrenching Surface Size0.562 INCHES NOMINAL FIRST END IN
MaterialSTEEL OVERALL
Nondefinitive Spec/std Data2 TYPE AND 3 CLASS AND A STYLE
Wrenching Surface Shape12 POINT BOTH ENDS INTERNAL
Wrenching End Offset Angle40.0 DEGREES MINIMUM AND 65.0 DEGREES MAXIMUM
Specification/standard Data81343-SAE AS954 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Surface TreatmentCHROMIUM OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5120-00-222-1593 INTERCHANGEABLE
Wrench,box
5120-00-222-1599 INTERCHANGEABLE
Wrench,box
5120-00-224-3135 INTERCHANGEABLE
Wrench,box
5120-00-224-3136 INTERCHANGEABLE
Wrench,box
5120-00-224-3137 INTERCHANGEABLE
Wrench,box
5120-00-224-3141 INTERCHANGEABLE
Wrench,box
5120-00-224-3142 INTERCHANGEABLE
Wrench,box
5120-00-224-3144 INTERCHANGEABLE
Wrench,box
5120-00-228-9521 INTERCHANGEABLE
Wrench,box
5120-00-264-5210 INTERCHANGEABLE
Wrench,box
Cross-Reference Index
Part NumberManufacturer
27-379 Armstrong Bros Tool Co (USA)
B107.100 The American Society of Mechanical Engineers (USA)
B107.9 TY3CL1 General Services Administration Federal Supply Service (USA)
AS954 TY2CL3STA General Services Administration Federal Supply Service (USA)
AS954 Society of Automotive Engineers Inc (USA)
B107.9 The American Society of Mechanical Engineers (USA)
A-A-1344 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
AS954 Sae International Dba Sae International (USA)
27-379 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
27-379 Apex Tool Group, Llc Dba Nicholson (USA)
B107.6 The American Society of Mechanical Engineers (USA)
GGG-W-636 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5120-00-222-1593INTERCHANGEABLE
WRENCH,BOX
5120-00-222-1599INTERCHANGEABLE
WRENCH,BOX
5120-00-224-3135INTERCHANGEABLE
WRENCH,BOX
5120-00-224-3136INTERCHANGEABLE
WRENCH,BOX
5120-00-224-3137INTERCHANGEABLE
WRENCH,BOX
5120-00-224-3141INTERCHANGEABLE
WRENCH,BOX
5120-00-224-3142INTERCHANGEABLE
WRENCH,BOX
5120-00-224-3144INTERCHANGEABLE
WRENCH,BOX
5120-00-228-9521INTERCHANGEABLE
WRENCH,BOX
5120-00-264-5210INTERCHANGEABLE
WRENCH,BOX
5120-00-264-5212INTERCHANGEABLE
WRENCH,BOX
5120-00-277-1582INTERCHANGEABLE
WRENCH,BOX

Frequently Asked Questions

What is NSN 5120-00-224-3140?

NSN 5120-00-224-3140 is a Wrench,box, manufactured by Armstrong Bros Tool Co, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-224-3140?

NSN 5120-00-224-3140 has 12 cross-referenced part numbers: 27-379 (Armstrong Bros Tool Co), B107.100 (The American Society of Mechanical Engineers), B107.9 TY3CL1 (General Services Administration Federal Supply Service), AS954 TY2CL3STA (General Services Administration Federal Supply Service), AS954 (Society of Automotive Engineers Inc) and 7 more.

What NSN replaces 5120-00-224-3140?

There are 12 known substitutes for 5120-00-224-3140: 5120-00-222-1593, 5120-00-222-1599, 5120-00-224-3135 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 27-379?

Key specifications for 27-379: Wrenching Surface Size: 0.625 INCHES NOMINAL SECOND END IN; Style Designator: DEEP ANGULAR OFFSET DOUBLE HEAD; Wrenching Surface Size: 0.562 INCHES NOMINAL FIRST END IN; Special Features: FORGED STEEL. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-224-3140 still in active supply?

NSN 5120-00-224-3140 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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