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PartsTable / COMPONENT / AR 8-78
AR 8-78 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The CUTTER BIT,TOOL HOLDER is a the manufacturer industrial component. Key specifications include shape: SQUARE, material: CARBIDE, edge_type: RIGHT HAND TURNING, overall_width: 0.500 INCHES NOMINAL IN, overall_length: 3.500 INCHES NOMINAL IN, unable_to_decode: UNABLE TO DECODE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3455-01-047-1807, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
AR 8-78
NSN: 3455-01-047-1807
FSC: 3455
CAGE: 03914 — ARMSTRONG BROS TOOL CO (USA)
SPECIFICATIONS
shapeSQUARE
materialCARBIDE
edge_typeRIGHT HAND TURNING
overall_width0.500 INCHES NOMINAL IN
overall_length3.500 INCHES NOMINAL IN
unable_to_decodeUNABLE TO DECODE
material_locationOVERALL
overall_thickness0.500 INCHES NOMINAL IN
cutting_edge_finishGROUND TO SHAPE
nondefinitive_spec/std_dataAR STYLE AND 8 SIZE AND -7 CLASS
NSN3455-01-047-1807
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CUTTER BIT,TOOL HOLDER TITLE COMPONENT PN AR 8-78 MFR CUTTER BIT,TOOL HOLDER
KEY FEATURES
•
CUTTING EDGE FINISH: GROUND TO SHAPE
•
OVERALL THICKNESS: 0.500 INCHES NOMINAL IN
•
UNABLE TO DECODE: UNABLE TO DECODE
•
SHAPE: SQUARE
•
NONDEFINITIVE SPEC/STD DATA: AR STYLE AND 8 SIZE AND -7 CLASS
•
MATERIAL: CARBIDE
•
MATERIAL LOCATION: OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CUTTING EDGE FINISHGROUND TO SHAPE
OVERALL THICKNESS0.500 INCHES NOMINAL IN
UNABLE TO DECODEUNABLE TO DECODE
SHAPESQUARE
NONDEFINITIVE SPEC/STD DATAAR STYLE AND 8 SIZE AND -7 CLASS
MATERIALCARBIDE
OVERALL LENGTH3.500 INCHES NOMINAL IN
MATERIAL LOCATIONOVERALL
OVERALL WIDTH0.500 INCHES NOMINAL IN
EDGE TYPERIGHT HAND TURNING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
87425Interchangeable
interchangeable cross-reference
interchangeable
01816Interchangeable
interchangeable cross-reference
interchangeable
A-A-51143Interchangeable
Same NIIN cross-reference
interchangeable
ANSI B212.1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AR 8-78?
AR 8-78 is a CUTTER BIT,TOOL HOLDER.
What parts can replace AR 8-78?
There are 4 known substitutes for AR 8-78: 87425, 01816, A-A-51143 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AR 8-78?
AR 8-78 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3455-01-047-1807. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026