PartsTable
Technical Data Sheet

ATI447D-4-1/4 — COUNTERSINK

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

ATI447D-4-1/4: COUNTERSINK.

The COUNTERSINK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, shank_style: STRAIGHT ROUND, body_diameter: 0.438 INCHES NOMINAL IN, included_angle: 100.0 DEGREES NOMINAL, overall_length: 1.750 INCHES NOMINAL IN, point_diameter: 0.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5133-01-066-9074, 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
ATI447D-4-1/4
NSN: 5133-01-066-9074
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
materialSTEEL OVERALL
shank_styleSTRAIGHT ROUND
body_diameter0.438 INCHES NOMINAL IN
flute_quantity2
included_angle100.0 DEGREES NOMINAL
overall_length1.750 INCHES NOMINAL IN
point_diameter0.250 INCHES NOMINAL IN
shank_diameter0.250 INCHES NOMINAL IN
cutting_end_styleSTRAIGHT FLUTE BLUNT END
cutting_rotation_directionRIGHT-HAND
NSN5133-01-066-9074
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available COUNTERSINK TITLE COMPONENT PN ATI447D-4-1/4 MFR COUNTERSINK
KEY FEATURES
•
SHANK DIAMETER: 0.250 INCHES NOMINAL IN
•
BODY DIAMETER: 0.438 INCHES NOMINAL IN
•
POINT DIAMETER: 0.250 INCHES NOMINAL IN
•
CUTTING END STYLE: STRAIGHT FLUTE BLUNT END
•
CUTTING ROTATION DIRECTION: RIGHT-HAND
•
SHANK STYLE: STRAIGHT ROUND
•
FLUTE QUANTITY: 2
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.250 INCHES NOMINAL IN
BODY DIAMETER0.438 INCHES NOMINAL IN
POINT DIAMETER0.250 INCHES NOMINAL IN
CUTTING END STYLESTRAIGHT FLUTE BLUNT END
OVERALL LENGTH1.750 INCHES NOMINAL IN
CUTTING ROTATION DIRECTIONRIGHT-HAND
SHANK STYLESTRAIGHT ROUND
FLUTE QUANTITY2
INCLUDED ANGLE100.0 DEGREES NOMINAL
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
AT447D-4 1/4Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ATI447D-4-1/4?
ATI447D-4-1/4 is a COUNTERSINK.
What parts can replace ATI447D-4-1/4?
There is 1 known substitute for ATI447D-4-1/4: AT447D-4 1/4. Substitute compatibility should be verified for your specific system.
What is the NSN for ATI447D-4-1/4?
ATI447D-4-1/4 is cataloged in the U.S. Government catalog under NSN 5133-01-066-9074. 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.