PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3726Wrench,open End

Martin Sprocket and Gear Inc · NSN 5120-00-289-8212 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-289-8212 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-289-8212. Primary manufacturer part number: 3726.
Features
  • Wrench,open End — FSC 5120
  • Small End Head Thickness: 0.422 INCHES MAXIMUM IN
  • Large End Head Thickness: 0.422 INCHES MAXIMUM IN
  • Specification/standard Data: 05047-ASME B107.100 CAT 39 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Nondefinitive Spec/std Data: 2 TYPE AND 3 CLASS
  • Surface Treatment: CHROMIUM OVERALL
  • Wrenching Surface Shape: OVAL BOTH ENDS INTERNAL
  • Style Designator: DOUBLE HEAD
Applications
  • Applications requiring Steel Overall construction
General Description

The Wrench,open End, cataloged under National Stock Number 5120-00-289-8212, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Martin Sprocket and Gear Inc. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 6 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
NSN5120-00-289-8212
Primary Part Number3726
Item NameWrench,open End
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerMartin Sprocket and Gear Inc
StatusCANCELLED
Small End Head Thickness0.422 INCHES MAXIMUM IN
Large End Head Thickness0.422 INCHES MAXIMUM IN
Specification/standard Data05047-ASME B107.100 CAT 39 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Nondefinitive Spec/std Data2 TYPE AND 3 CLASS
Surface TreatmentCHROMIUM OVERALL
Wrenching Surface ShapeOVAL BOTH ENDS INTERNAL
Style DesignatorDOUBLE HEAD
MaterialSTEEL OVERALL
Small End Head Angle15.0 DEGREES NOMINAL
Wrenching Surface Size1.500 INCHES NOMINAL BOTH ENDS IN
Large End Head Angle60.0 DEGREES NOMINAL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5950-00-127-927816738181-001 INTERCHANGEABLE
Transformer,power
Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services
5120-00-184-86523717 INTERCHANGEABLE
Wrench,open End
Martin Sprocket and Gear Inc
5120-00-184-86533718 INTERCHANGEABLE
Wrench,open End
Martin Sprocket and Gear Inc
5120-00-184-86543719 INTERCHANGEABLE
Wrench,open End
Martin Sprocket and Gear Inc
5120-00-289-82095120002898209 INTERCHANGEABLE
Wrench,open End
General Services Administration Federal Supply Service
5120-00-289-8210 INTERCHANGEABLE
Wrench,open End
5120-00-293-00533716 INTERCHANGEABLE
Wrench,open End
Martin Sprocket and Gear Inc
5120-00-293-1794 INTERCHANGEABLE
Wrench,open End
5120-00-293-17963715 INTERCHANGEABLE
Wrench,open End
Martin Sprocket and Gear Inc
5120-00-293-21363721 INTERCHANGEABLE
Wrench,open End
Martin Sprocket and Gear Inc
Cross-Reference Index
Part NumberManufacturer
3726 Martin Sprocket and Gear Inc (USA)
DA48 Stanley Industrial & Automotive Llc (USA)
B107.39 The American Society of Mechanical Engineers (USA)
B107.39 TY2CL2 General Services Administration Federal Supply Service (USA)
B107.100 The American Society of Mechanical Engineers (USA)
GGG-W-636 TY16ST1 General Services Administration Federal Supply Service (USA)
GGG-W-636 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
A-A-1359 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
B107.100 CAT 39 TY2CL3 General Services Administration Federal Supply Service (USA)
Related Parts
5950-00-127-9278INTERCHANGEABLE
TRANSFORMER,POWER
16738181-001
5120-00-184-8652INTERCHANGEABLE
WRENCH,OPEN END
3717
5120-00-184-8653INTERCHANGEABLE
WRENCH,OPEN END
3718
5120-00-184-8654INTERCHANGEABLE
WRENCH,OPEN END
3719
5120-00-289-8209INTERCHANGEABLE
WRENCH,OPEN END
5120002898209
5120-00-289-8210INTERCHANGEABLE
WRENCH,OPEN END
5120-00-293-0053INTERCHANGEABLE
WRENCH,OPEN END
3716
5120-00-293-1794INTERCHANGEABLE
WRENCH,OPEN END
5120-00-293-1796INTERCHANGEABLE
WRENCH,OPEN END
3715
5120-00-293-2136INTERCHANGEABLE
WRENCH,OPEN END
3721
2805-00-374-3091INTERCHANGEABLE
CONNECTING ROD,PISTON
DA48
5998-00-519-0164INTERCHANGEABLE
PRINTED CIRCUIT BOARD

Frequently Asked Questions

What is NSN 5120-00-289-8212?

NSN 5120-00-289-8212 is a Wrench,open End, manufactured by Martin Sprocket and Gear Inc, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-00-289-8212?

NSN 5120-00-289-8212 has 9 cross-referenced part numbers: 3726 (Martin Sprocket and Gear Inc), DA48 (Stanley Industrial & Automotive Llc), B107.39 (The American Society of Mechanical Engineers), B107.39 TY2CL2 (General Services Administration Federal Supply Service), B107.100 (The American Society of Mechanical Engineers) and 4 more.

What NSN replaces 5120-00-289-8212?

There are 12 known substitutes for 5120-00-289-8212: 5950-00-127-9278, 5120-00-184-8652, 5120-00-184-8653 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3726?

Key specifications for 3726: Small End Head Thickness: 0.422 INCHES MAXIMUM IN; Large End Head Thickness: 0.422 INCHES MAXIMUM IN; Specification/standard Data: 05047-ASME B107.100 CAT 39 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Nondefinitive Spec/std Data: 2 TYPE AND 3 CLASS. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-289-8212 still in active supply?

NSN 5120-00-289-8212 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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