PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

26-504Cutter,milling,commutator Mica

Ideal Industries, Inc. · NSN 4940-00-287-3221 · FSC 4940 · No Item Name Available
Verified by PartsTable
NSN 4940-00-287-3221 — this item is cataloged by the U.S. Government under National Stock Number 4940-00-287-3221. Primary manufacturer part number: 26-504.
Features
  • Cutter,milling,commutator Mica — FSC 4940
  • Cut Shape: U-SLOT
  • Material: STEEL
  • Thickness: 0.023 INCHES NOMINAL IN
  • Outside Diameter: 0.875 INCHES NOMINAL IN
  • Mounting Hole Diameter: 0.312 INCHES NOMINAL IN
  • 2 verified cross-references
  • Primary manufacturer: Ideal Industries, Inc.
Applications
  • Applications requiring Steel construction
General Description

The Cutter,milling,commutator Mica, cataloged under National Stock Number 4940-00-287-3221, is classified within Federal Supply Class 4940 (No Item Name Available) of the Maintenance and Repair Shop Equipment group. The primary manufacturer of record is Ideal Industries, Inc.. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4940-00-287-3221
Primary Part Number26-504
Item NameCutter,milling,commutator Mica
FSC / FSG4940 / 49 — No Item Name Available
ManufacturerIdeal Industries, Inc.
StatusACTIVE
Cut ShapeU-SLOT
MaterialSTEEL
Thickness0.023 INCHES NOMINAL IN
Outside Diameter0.875 INCHES NOMINAL IN
Mounting Hole Diameter0.312 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-118-330826504 INTERCHANGEABLE
Gasket
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
5133-00-186-71055133-00-186-7105 INTERCHANGEABLE
Drill,masonry,hand
General Services Administration Federal Supply Service
4940-00-204-0319 INTERCHANGEABLE
Undercutter,armature Mica,electr
4720-00-243-353526504 INTERCHANGEABLE
Hose,preformed
Gates Corporation
3455-00-254-847515120 INTERCHANGEABLE
Cutter,milling,screw Slotting
F & D Tool Co Inc
4940-00-270-159410T INTERCHANGEABLE
Undercutter,armature Mica,electr
Rjk Corp
4940-00-273-370426-153 INTERCHANGEABLE
Cutter,milling,commutator Mica
Ideal Industries, Inc.
4940-00-273-370526-155 INTERCHANGEABLE
Cutter,milling,commutator Mica
Ideal Industries, Inc.
4940-00-278-980826-055 INTERCHANGEABLE
Cutter,milling,commutator Mica
Ideal Industries, Inc.
4940-00-287-321726-501 INTERCHANGEABLE
Cutter,milling,commutator Mica
Ideal Industries, Inc.
Cross-Reference Index
Part NumberManufacturer
MILU17148 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
26-504 PRIMARY Ideal Industries, Inc. (USA)
Related Parts
5330-00-118-3308INTERCHANGEABLE
GASKET
26504
5133-00-186-7105INTERCHANGEABLE
DRILL,MASONRY,HAND
5133-00-186-7105
4940-00-204-0319INTERCHANGEABLE
UNDERCUTTER,ARMATURE MICA,ELECTR
4720-00-243-3535INTERCHANGEABLE
HOSE,PREFORMED
26504
3455-00-254-8475INTERCHANGEABLE
CUTTER,MILLING,SCREW SLOTTING
15120
4940-00-270-1594INTERCHANGEABLE
UNDERCUTTER,ARMATURE MICA,ELECTR
10T
4940-00-273-3704INTERCHANGEABLE
CUTTER,MILLING,COMMUTATOR MICA
26-153
4940-00-273-3705INTERCHANGEABLE
CUTTER,MILLING,COMMUTATOR MICA
26-155
4940-00-278-9808INTERCHANGEABLE
CUTTER,MILLING,COMMUTATOR MICA
26-055
4940-00-287-3217INTERCHANGEABLE
CUTTER,MILLING,COMMUTATOR MICA
26-501
4940-00-287-3218INTERCHANGEABLE
CUTTER,MILLING,COMMUTATOR MICA
26-503
4940-00-287-3219INTERCHANGEABLE
CUTTER,MILLING,COMMUTATOR MICA
26-502

Frequently Asked Questions

What is NSN 4940-00-287-3221?

NSN 4940-00-287-3221 is a Cutter,milling,commutator Mica, manufactured by Ideal Industries, Inc., classified under FSC 4940 (No Item Name Available). Status: active.

What are the part numbers for NSN 4940-00-287-3221?

NSN 4940-00-287-3221 has 2 cross-referenced part numbers: MILU17148 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 26-504 (Ideal Industries, Inc.).

What NSN replaces 4940-00-287-3221?

There are 12 known substitutes for 4940-00-287-3221: 5330-00-118-3308, 5133-00-186-7105, 4940-00-204-0319 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 26-504?

Key specifications for 26-504: Cut Shape: U-SLOT; Material: STEEL; Thickness: 0.023 INCHES NOMINAL IN; Outside Diameter: 0.875 INCHES NOMINAL IN. 5 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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