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PartsTable / COMPONENT / AL 7-78B
AL 7-78B ✓ 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, overall_width: 0.437 INCHES NOMINAL IN, overall_length: 3.000 INCHES NOMINAL IN, unable_to_decode: UNABLE TO DECODE, material_location: TIP. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3455-01-053-5209, 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
AL 7-78B
NSN: 3455-01-053-5209
FSC: 3455
CAGE: 03914 — ARMSTRONG BROS TOOL CO (USA)
SPECIFICATIONS
shapeSQUARE
materialCARBIDE
overall_width0.437 INCHES NOMINAL IN
overall_length3.000 INCHES NOMINAL IN
unable_to_decodeUNABLE TO DECODE
material_locationTIP
overall_thickness0.437 INCHES NOMINAL IN
cutting_edge_finishUNGROUND
nondefinitive_spec/std_dataAL STYLE AND 7 SIZE AND 5 CLASS
material_type_for_which_designedNONFERROUS METAL
NSN3455-01-053-5209
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CUTTER BIT,TOOL HOLDER TITLE COMPONENT PN AL 7-78B MFR CUTTER BIT,TOOL HOLDER
KEY FEATURES
•
NONDEFINITIVE SPEC/STD DATA: AL STYLE AND 7 SIZE AND 5 CLASS
•
MATERIAL TYPE FOR WHICH DESIGNED: NONFERROUS METAL
•
SHAPE: SQUARE
•
MATERIAL: CARBIDE
•
MATERIAL LOCATION: TIP
•
UNABLE TO DECODE: UNABLE TO DECODE
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATAAL STYLE AND 7 SIZE AND 5 CLASS
MATERIAL TYPE FOR WHICH DESIGNEDNONFERROUS METAL
SHAPESQUARE
MATERIALCARBIDE
OVERALL LENGTH3.000 INCHES NOMINAL IN
OVERALL WIDTH0.437 INCHES NOMINAL IN
MATERIAL LOCATIONTIP
UNABLE TO DECODEUNABLE TO DECODE
CUTTING EDGE FINISHUNGROUND
OVERALL THICKNESS0.437 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
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 AL 7-78B?
AL 7-78B is a CUTTER BIT,TOOL HOLDER.
What parts can replace AL 7-78B?
There are 20 known substitutes for AL 7-78B: B212.1, A-A-51143 ST AR SZ 8 CL 5, AR 8 370 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AL 7-78B?
AL 7-78B is cataloged in the Federal Logistics Information System (FLIS) under NSN 3455-01-053-5209. 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