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Technical Data Sheet
AR7-78B ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
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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: 0.438 INCHES NOMINAL IN, overall_length: 3.000 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 3455-01-050-9845, 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
AR7-78B
NSN: 3455-01-050-9845
FSC: 3455
CAGE: 03914 — ARMSTRONG BROS TOOL CO (USA)
SPECIFICATIONS
shapeSQUARE
materialCARBIDE
edge_typeRIGHT HAND TURNING
overall_width0.438 INCHES NOMINAL IN
overall_length3.000 INCHES NOMINAL IN
unable_to_decodeUNABLE TO DECODE
material_locationTIP
overall_thickness0.438 INCHES NOMINAL IN
cutting_edge_finishGROUND TO SHAPE
nondefinitive_spec/std_dataAR STYLE AND 7 SIZE AND 5 CLASS
material_type_for_which_designedNONFERROUS METAL
NSN3455-01-050-9845
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CUTTER BIT,TOOL HOLDER TITLE COMPONENT PN AR7-78B MFR CUTTER BIT,TOOL HOLDER
KEY FEATURES
SHAPE: SQUARE
NONDEFINITIVE SPEC/STD DATA: AR STYLE AND 7 SIZE AND 5 CLASS
MATERIAL: CARBIDE
MATERIAL LOCATION: TIP
OVERALL THICKNESS: 0.438 INCHES NOMINAL IN
MATERIAL TYPE FOR WHICH DESIGNED: NONFERROUS METAL
TECHNICAL CHARACTERISTICS (FLIS)
SHAPESQUARE
NONDEFINITIVE SPEC/STD DATAAR STYLE AND 7 SIZE AND 5 CLASS
MATERIALCARBIDE
MATERIAL LOCATIONTIP
OVERALL WIDTH0.438 INCHES NOMINAL IN
OVERALL LENGTH3.000 INCHES NOMINAL IN
OVERALL THICKNESS0.438 INCHES NOMINAL IN
MATERIAL TYPE FOR WHICH DESIGNEDNONFERROUS METAL
EDGE TYPERIGHT HAND TURNING
UNABLE TO DECODEUNABLE TO DECODE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
B212.1Interchangeable
interchangeable cross-reference
interchangeable
A-A-51143 ST AR SZ 8 CL 5Interchangeable
interchangeable cross-reference
interchangeable
AR 8 370Interchangeable
interchangeable cross-reference
interchangeable
AL5Interchangeable
interchangeable cross-reference
interchangeable
B2-121Interchangeable
interchangeable cross-reference
interchangeable
52-121Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AR7-78B?
AR7-78B is a CUTTER BIT,TOOL HOLDER.
What parts can replace AR7-78B?
There are 18 known substitutes for AR7-78B: B212.1, A-A-51143 ST AR SZ 8 CL 5, AR 8 370 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AR7-78B?
AR7-78B is cataloged in the Federal Logistics Information System (FLIS) under NSN 3455-01-050-9845. This indicates validated use in U.S. government and defense supply chains.
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