PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

28-212Wrench,open End and Flarenut,com

Armstrong Bros Tool Co · NSN 5120-01-127-5642 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-127-5642 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-127-5642. Primary manufacturer part number: 28-212.
Features
  • Wrench,open End and Flarenut,com — FSC 5120
  • General Characteristics Item Description: STEEL; CHROME PLATED; DOUBLE HEAD; 6 POINT FLARENUT END; 3/8 IN. OPENINGS AT BOTH ENDS; 0.220 IN. OPEN END HEAD THICKNESS; 0.340 IN. FLARENUT END HEAD THICKNESS; 5 IN. LG IN
  • 4 verified cross-references
  • Primary manufacturer: Armstrong Bros Tool Co
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Wrench,open End and Flarenut,com, cataloged under National Stock Number 5120-01-127-5642, 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 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-127-5642
Primary Part Number28-212
Item NameWrench,open End and Flarenut,com
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerArmstrong Bros Tool Co
StatusACTIVE
General Characteristics Item DescriptionSTEEL; CHROME PLATED; DOUBLE HEAD; 6 POINT FLARENUT END; 3/8 IN. OPENINGS AT BOTH ENDS; 0.220 IN. OPEN END HEAD THICKNESS; 0.340 IN. FLARENUT END HEAD THICKNESS; 5 IN. LG IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5930-00-069-975728212 INTERCHANGEABLE
Switch,liquid Level
Setra Systems, Inc. Dba Gems Sensors
2805-00-271-954428212 INTERCHANGEABLE
Valve,poppet,engine
Brinkley Technology Group Llc Dba Hercules Manufacturing
5999-00-500-88262821-2 INTERCHANGEABLE
Contact,electrical
Drs Naval Power Systems Inc Dba Drs Power & Control Technologies Inc
6145-00-949-9306 INTERCHANGEABLE
Cable,special Purpose,electrical
5305-01-177-7939 INTERCHANGEABLE
Screw
6145-01-325-24082821/2 INTERCHANGEABLE
Cable,special Purpose,electrical
Belden, Inc.
Cross-Reference Index
Part NumberManufacturer
28-212 Armstrong Bros Tool Co (USA)
1312 Armstrong Bros Tool Co (USA)
28-212 Apex Tool Group, Llc Dba Nicholson (USA)
28-212 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
Related Parts
5930-00-069-9757INTERCHANGEABLE
SWITCH,LIQUID LEVEL
28212
2805-00-271-9544INTERCHANGEABLE
VALVE,POPPET,ENGINE
28212
5999-00-500-8826INTERCHANGEABLE
CONTACT,ELECTRICAL
2821-2
6145-00-949-9306INTERCHANGEABLE
CABLE,SPECIAL PURPOSE,ELECTRICAL
5305-01-177-7939INTERCHANGEABLE
SCREW
6145-01-325-2408INTERCHANGEABLE
CABLE,SPECIAL PURPOSE,ELECTRICAL
2821/2

Frequently Asked Questions

What is NSN 5120-01-127-5642?

NSN 5120-01-127-5642 is a Wrench,open End and Flarenut,com, manufactured by Armstrong Bros Tool Co, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-127-5642?

NSN 5120-01-127-5642 has 4 cross-referenced part numbers: 28-212 (Armstrong Bros Tool Co), 1312 (Armstrong Bros Tool Co), 28-212 (Apex Tool Group, Llc Dba Nicholson), 28-212 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.).

What NSN replaces 5120-01-127-5642?

There are 6 known substitutes for 5120-01-127-5642: 5930-00-069-9757, 2805-00-271-9544, 5999-00-500-8826 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 28-212?

Key specifications for 28-212: General Characteristics Item Description: STEEL; CHROME PLATED; DOUBLE HEAD; 6 POINT FLARENUT END; 3/8 IN. OPENINGS AT BOTH ENDS; 0.220 IN. OPEN END HEAD THICKNESS; 0.340 IN. FLARENUT END HEAD THICKNESS; 5 IN. LG IN. 1 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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