PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

28-220Wrench,open End and Flarenut,com

Armstrong Bros Tool Co · NSN 5120-01-127-5641 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-127-5641 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-127-5641. Primary manufacturer part number: 28-220.
Features
  • Wrench,open End and Flarenut,com — FSC 5120
  • General Characteristics Item Description: STEEL; CHROME PLATED; DOUBLE HEAD; 6 POINT FLARENUT END; 5/8 IN. OPENINGS AT BOTH ENDS; 0.320 IN. OPEN END HEAD THICKNESS; 0.440 IN. FLARENUT END HEAD THICKNESS; 7 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 5120-01-127-5641, 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-127-5641
Primary Part Number28-220
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; 5/8 IN. OPENINGS AT BOTH ENDS; 0.320 IN. OPEN END HEAD THICKNESS; 0.440 IN. FLARENUT END HEAD THICKNESS; 7 IN. LG IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
1680-00-242-620628220 INTERCHANGEABLE
Filter,aircraft Instruments
Arvinmeritor Inc
3805-00-430-9525125960 INTERCHANGEABLE
Pump,hydraulic Gear
Komatsu America Corporation
5950-00-583-0960 INTERCHANGEABLE
Transformer,audio Frequency
3020-01-108-651328220 INTERCHANGEABLE
Gear,spur
Moog Inc. Dba Ampac-Isp Corp
5305-01-513-86548310728 INTERCHANGEABLE
Screw,machine
Jlg Industries, Inc.
6130-01-542-04072720A INTERCHANGEABLE
Charger,battery
Guest Co Inc the
6130-01-614-255228220 INTERCHANGEABLE
Charger,battery
Marinco Shore Power Systems
Cross-Reference Index
Part NumberManufacturer
28-220 Armstrong Bros Tool Co (USA)
28-220 Apex Tool Group, Llc Dba Nicholson (USA)
1320 Armstrong Bros Tool Co (USA)
28-220 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
Related Parts
1680-00-242-6206INTERCHANGEABLE
FILTER,AIRCRAFT INSTRUMENTS
28220
3805-00-430-9525INTERCHANGEABLE
PUMP,HYDRAULIC GEAR
125960
5950-00-583-0960INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
3020-01-108-6513INTERCHANGEABLE
GEAR,SPUR
28220
5305-01-513-8654INTERCHANGEABLE
SCREW,MACHINE
8310728
6130-01-542-0407INTERCHANGEABLE
CHARGER,BATTERY
2720A
6130-01-614-2552INTERCHANGEABLE
CHARGER,BATTERY
28220

Frequently Asked Questions

What is NSN 5120-01-127-5641?

NSN 5120-01-127-5641 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 5120-01-127-5641?

NSN 5120-01-127-5641 has 4 cross-referenced part numbers: 28-220 (Armstrong Bros Tool Co), 28-220 (Apex Tool Group, Llc Dba Nicholson), 1320 (Armstrong Bros Tool Co), 28-220 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.).

What NSN replaces 5120-01-127-5641?

There are 7 known substitutes for 5120-01-127-5641: 1680-00-242-6206, 3805-00-430-9525, 5950-00-583-0960 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 28-220?

Key specifications for 28-220: General Characteristics Item Description: STEEL; CHROME PLATED; DOUBLE HEAD; 6 POINT FLARENUT END; 5/8 IN. OPENINGS AT BOTH ENDS; 0.320 IN. OPEN END HEAD THICKNESS; 0.440 IN. FLARENUT END HEAD THICKNESS; 7 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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