PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

81671Wrench,box and Open End,combinat

Apex Tool Group, Llc Dba Nicholson · NSN 5120-01-664-8543 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-664-8543 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-664-8543. Primary manufacturer part number: 81671.
Features
  • Wrench,box and Open End,combinat — FSC 5120
  • Surface Treatment: CHROMIUM OVERALL
  • Style Designator: OFFSET
  • Wrenching Surface Size: 14.0 MILLIMETERS NOMINAL BOTH ENDS MM
  • Wrenching End Offset Angle: 15.0 DEGREES NOMINAL
  • Wrenching Surface Shape: OVAL FIRST END INTERNAL
  • Wrenching Surface Shape: 12 POINT SECOND END INTERNAL
  • Features Provided: FULL POLISH
Applications
  • Applications requiring Steel Overall construction
General Description

The Wrench,box and Open End,combinat, cataloged under National Stock Number 5120-01-664-8543, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Apex Tool Group, Llc Dba Nicholson. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-664-8543
Primary Part Number81671
Item NameWrench,box and Open End,combinat
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerApex Tool Group, Llc Dba Nicholson
StatusACTIVE
Surface TreatmentCHROMIUM OVERALL
Style DesignatorOFFSET
Wrenching Surface Size14.0 MILLIMETERS NOMINAL BOTH ENDS MM
Wrenching End Offset Angle15.0 DEGREES NOMINAL
Wrenching Surface ShapeOVAL FIRST END INTERNAL
Wrenching Surface Shape12 POINT SECOND END INTERNAL
Features ProvidedFULL POLISH
Head Angle15.0 DEGREES NOMINAL
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5935-00-168-40338167-1 INTERCHANGEABLE
Cover,electrical Connector
Microwave Devices Inc
5935-00-404-8914395844-1 INTERCHANGEABLE
Adapter,connector
L3harris Technologies, Inc. Dba Harris Corp Div Antenna Products
5945-00-606-721741185 INTERCHANGEABLE
Relay,electromagnetic
Sullair Corp
1650-00-732-772081671 INTERCHANGEABLE
Disk,valve
Hydro-Aire Aerospace Corp
5307-01-667-11318167-1 INTERCHANGEABLE
Stud,continuous Thread
Tru-Hitch, Inc.
Cross-Reference Index
Part NumberManufacturer
81671 Apex Tool Group, Llc Dba Nicholson (USA)
Related Parts
5935-00-168-4033INTERCHANGEABLE
COVER,ELECTRICAL CONNECTOR
8167-1
5935-00-404-8914INTERCHANGEABLE
ADAPTER,CONNECTOR
395844-1
5945-00-606-7217INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
41185
1650-00-732-7720INTERCHANGEABLE
DISK,VALVE
81671
5307-01-667-1131INTERCHANGEABLE
STUD,CONTINUOUS THREAD
8167-1

Frequently Asked Questions

What is NSN 5120-01-664-8543?

NSN 5120-01-664-8543 is a Wrench,box and Open End,combinat, manufactured by Apex Tool Group, Llc Dba Nicholson, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-664-8543?

NSN 5120-01-664-8543 has 1 cross-referenced part number: 81671 (Apex Tool Group, Llc Dba Nicholson).

What NSN replaces 5120-01-664-8543?

There are 5 known substitutes for 5120-01-664-8543: 5935-00-168-4033, 5935-00-404-8914, 5945-00-606-7217 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 81671?

Key specifications for 81671: Overall Length: 8.740 INCHES NOMINAL IN; Surface Treatment: CHROMIUM OVERALL; Style Designator: OFFSET; Wrenching Surface Size: 14.0 MILLIMETERS NOMINAL BOTH ENDS MM. 10 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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