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Technical Data Sheet
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AT488-26 — COUNTERBORE,MACHINE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

AT488-26: COUNTERBORE,MACHINE.

The COUNTERBORE,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, shank_style: STRAIGHT ROUND, overall_length: 2.000 INCHES NOMINAL IN, shank_diameter: 0.375 INCHES NOMINAL IN, cutting_end_style: INTERCHANGEABLE PILOT, features_provided: REPLACEABLE PILOT. This part is cataloged in the U.S.

Government catalog under NSN 5133-00-971-8553, 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
AT488-26
NSN: 5133-00-971-8553
FSC: 5133 — Drill Bits, Counterbores, and Countersinks: Hand and Machine
CAGE: 00784 — SNAP-ON INCORPORATED DBA SNAP-ON TOOLS DIV SNAP-ON INDUSTRIAL, SPECIAL PRODUCTS DIVISION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
shank_styleSTRAIGHT ROUND
flute_quantity4
overall_length2.000 INCHES NOMINAL IN
shank_diameter0.375 INCHES NOMINAL IN
cutting_end_styleINTERCHANGEABLE PILOT
features_providedREPLACEABLE PILOT
nominal_cutting_diameter1.0625 INCHES IN
pilot_hole_nominal_diameter0.1875 INCHES IN
NSN5133-00-971-8553
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available COUNTERBORE,MACHINE TITLE COMPONENT PN AT488-26 MFR COUNTERBORE,MACHINE
KEY FEATURES
•
SHANK DIAMETER: 0.375 INCHES NOMINAL IN
•
CUTTING END STYLE: INTERCHANGEABLE PILOT
•
NOMINAL CUTTING DIAMETER: 1.0625 INCHES IN
•
FEATURES PROVIDED: REPLACEABLE PILOT
•
SHANK STYLE: STRAIGHT ROUND
•
PILOT HOLE NOMINAL DIAMETER: 0.1875 INCHES IN
•
FLUTE QUANTITY: 4
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.375 INCHES NOMINAL IN
CUTTING END STYLEINTERCHANGEABLE PILOT
OVERALL LENGTH2.000 INCHES NOMINAL IN
NOMINAL CUTTING DIAMETER1.0625 INCHES IN
FEATURES PROVIDEDREPLACEABLE PILOT
SHANK STYLESTRAIGHT ROUND
PILOT HOLE NOMINAL DIAMETER0.1875 INCHES IN
FLUTE QUANTITY4
MATERIALSTEEL OVERALL
OTHER ITEMS IN FSC 5133 — Drill Bits, Counterbores, and Countersinks: Hand and Machine
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5133-00-001-1296 5133-00-001-1298 5133-00-005-2258 5133-00-005-7727 5133-00-005-8710 5133-00-005-8711 5133-00-005-8712 5133-00-005-8713
SUBSTITUTES & CROSS-REFERENCES 1
AT488C-26Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AT488-26?
AT488-26 is a COUNTERBORE,MACHINE.
What parts can replace AT488-26?
There is 1 known substitute for AT488-26: AT488C-26. Substitute compatibility should be verified for your specific system.
What is the NSN for AT488-26?
AT488-26 is cataloged in the U.S. Government catalog under NSN 5133-00-971-8553. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.