PartsTable
Technical Data Sheet

AT445CTG-4-1/4 — CUTTER,COUNTERSINK

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

AT445CTG-4-1/4: CUTTER,COUNTERSINK.

The CUTTER,COUNTERSINK is a the manufacturer industrial component. Key specifications include shank_style: EXTERNALLY THREADED, body_diameter: 0.625 INCHES NOMINAL IN, pilot_diameter: 0.250 INCHES NOMINAL IN, thread_quantity: 28 PER INCH, special_features: CARBIDE TIPPED, cutting_end_style: STRAIGHT FLUTE BLUNT END. This part is cataloged in the U.S.

Government catalog under NSN 5133-01-397-3234, 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
AT445CTG-4-1/4
NSN: 5133-01-397-3234
FSC: 5133 — Drill Bits, Counterbores, and Countersinks: Hand and Machine
CAGE: 55719 — IDSC HOLDINGS LLC DIV SNAP-ON INDUSTRIAL, A DIV. OF IDSC HOLDINGS , LLC (USA)
SPECIFICATIONS
shank_styleEXTERNALLY THREADED
body_diameter0.625 INCHES NOMINAL IN
flute_quantity2
pilot_diameter0.250 INCHES NOMINAL IN
thread_quantity28 PER INCH
special_featuresCARBIDE TIPPED
cutting_end_styleSTRAIGHT FLUTE BLUNT END
features_providedINTEGRAL PILOT
nominal_thread_diameter0.250 INCHES IN
thread_series_designatorUNF
NSN5133-01-397-3234
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CUTTER,COUNTERSINK TITLE COMPONENT PN AT445CTG-4-1/4 MFR CUTTER,COUNTERSINK
KEY FEATURES
•
BODY DIAMETER: 0.625 INCHES NOMINAL IN
•
CUTTING END STYLE: STRAIGHT FLUTE BLUNT END
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
FEATURES PROVIDED: INTEGRAL PILOT
•
PILOT DIAMETER: 0.250 INCHES NOMINAL IN
•
SHANK STYLE: EXTERNALLY THREADED
•
FLUTE QUANTITY: 2
TECHNICAL CHARACTERISTICS
BODY DIAMETER0.625 INCHES NOMINAL IN
CUTTING END STYLESTRAIGHT FLUTE BLUNT END
NOMINAL THREAD DIAMETER0.250 INCHES IN
FEATURES PROVIDEDINTEGRAL PILOT
PILOT DIAMETER0.250 INCHES NOMINAL IN
SHANK STYLEEXTERNALLY THREADED
FLUTE QUANTITY2
SPECIAL FEATURESCARBIDE TIPPED
THREAD SERIES DESIGNATORUNF
THREAD QUANTITY28 PER INCH
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AT445CTG-4-1/4?
AT445CTG-4-1/4 is a CUTTER,COUNTERSINK.
What is the NSN for AT445CTG-4-1/4?
AT445CTG-4-1/4 is cataloged in the U.S. Government catalog under NSN 5133-01-397-3234. 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.