PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3712Wrench,open End

Martin Sprocket and Gear Inc · NSN 5120-00-947-3189 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-947-3189 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-947-3189. Primary manufacturer part number: 3712.
Features
  • Wrench,open End — FSC 5120
  • Small End Head Thickness: 0.219 INCHES NOMINAL IN
  • Large End Head Angle: 60.0 DEGREES NOMINAL
  • Wrenching Surface Shape: OVAL BOTH ENDS INTERNAL
  • Style Designator: DOUBLE HEAD
  • Specification/standard Data: 05047-ASME B107.100 CAT 39 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Wrenching Surface Size: 0.500 INCHES NOMINAL BOTH ENDS IN
  • Nondefinitive Spec/std Data: 2 TYPE AND 3 CLASS
Applications
  • Applications requiring Steel Overall construction
General Description

The Wrench,open End, cataloged under National Stock Number 5120-00-947-3189, 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 11 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
NSN5120-00-947-3189
Primary Part Number3712
Item NameWrench,open End
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerMartin Sprocket and Gear Inc
StatusCANCELLED
Small End Head Thickness0.219 INCHES NOMINAL IN
Large End Head Angle60.0 DEGREES NOMINAL
Wrenching Surface ShapeOVAL BOTH ENDS INTERNAL
Style DesignatorDOUBLE HEAD
Specification/standard Data05047-ASME B107.100 CAT 39 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Wrenching Surface Size0.500 INCHES NOMINAL BOTH ENDS IN
Nondefinitive Spec/std Data2 TYPE AND 3 CLASS
Small End Head Angle15.0 DEGREES NOMINAL
Surface TreatmentCHROMIUM OVERALL
MaterialSTEEL OVERALL
Large End Head Thickness0.219 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5950-00-008-25633712 INTERCHANGEABLE
Reactor
Elnetic Electronics Inc
5120-00-132-1031 INTERCHANGEABLE
Wrench,open End
5120-00-142-5240 INTERCHANGEABLE
Wrench Set,open End,fixed
5975-00-174-91243712 INTERCHANGEABLE
Reducing Washer,knockout
Abb Installation Products Inc
2530-00-427-4385392595C91 INTERCHANGEABLE
Cylinder Assembly,hydraulic Brak
Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/
5120-00-540-1795 INTERCHANGEABLE
Wrench,open End
5940-00-602-58343712 INTERCHANGEABLE
Terminal
Molex-Etc Inc Sub of Molex Inc
5355-00-614-0400MS91531-3N2B INTERCHANGEABLE
Knob
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
2805-00-737-6306G-7712 INTERCHANGEABLE
Guide,valve Stem
Dana Corp Spicer Transmission Div
2530-00-848-19323712 INTERCHANGEABLE
Parts Kit,vehicular Wheel
Pdi Ground Support Systems, Inc.
Cross-Reference Index
Part NumberManufacturer
GGG-W-636 TY16ST2 General Services Administration Federal Supply Service (USA)
VS5216 Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
B107.39 TY2CL1 General Services Administration Federal Supply Service (USA)
B107.100 CAT 39 TY2CL3 General Services Administration Federal Supply Service (USA)
595862-013 Litton Systems Inc. Div Navigation Systems Division (USA)
3712 PRIMARY Martin Sprocket and Gear Inc (USA)
GGG-W-636 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
595862-013 PRIMARY Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
B107.6 The American Society of Mechanical Engineers (USA)
B107.100 The American Society of Mechanical Engineers (USA)
B107.39 The American Society of Mechanical Engineers (USA)
Related Parts
5950-00-008-2563INTERCHANGEABLE
REACTOR
3712
5120-00-132-1031INTERCHANGEABLE
WRENCH,OPEN END
5120-00-142-5240INTERCHANGEABLE
WRENCH SET,OPEN END,FIXED
5975-00-174-9124INTERCHANGEABLE
REDUCING WASHER,KNOCKOUT
3712
2530-00-427-4385INTERCHANGEABLE
CYLINDER ASSEMBLY,HYDRAULIC BRAK
392595C91
5120-00-540-1795INTERCHANGEABLE
WRENCH,OPEN END
5940-00-602-5834INTERCHANGEABLE
TERMINAL
3712
5355-00-614-0400INTERCHANGEABLE
KNOB
MS91531-3N2B
2805-00-737-6306INTERCHANGEABLE
GUIDE,VALVE STEM
G-7712
2530-00-848-1932INTERCHANGEABLE
PARTS KIT,VEHICULAR WHEEL
3712
2940-00-890-2502INTERCHANGEABLE
FILTER ELEMENT,FLUID
33712
5985-00-919-5444INTERCHANGEABLE
ATTENUATOR,VARIABLE
3712

Frequently Asked Questions

What is NSN 5120-00-947-3189?

NSN 5120-00-947-3189 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 5120-00-947-3189?

NSN 5120-00-947-3189 has 11 cross-referenced part numbers: GGG-W-636 TY16ST2 (General Services Administration Federal Supply Service), VS5216 (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc), B107.39 TY2CL1 (General Services Administration Federal Supply Service), B107.100 CAT 39 TY2CL3 (General Services Administration Federal Supply Service), 595862-013 (Litton Systems Inc. Div Navigation Systems Division) and 6 more.

What NSN replaces 5120-00-947-3189?

There are 12 known substitutes for 5120-00-947-3189: 5950-00-008-2563, 5120-00-132-1031, 5120-00-142-5240 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3712?

Key specifications for 3712: Small End Head Thickness: 0.219 INCHES NOMINAL IN; Large End Head Angle: 60.0 DEGREES NOMINAL; Wrenching Surface Shape: OVAL BOTH ENDS INTERNAL; Style Designator: DOUBLE HEAD. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-00-947-3189 still in active supply?

NSN 5120-00-947-3189 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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