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166C011-309B5 — COUNTERSINK

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

166C011-309B5: COUNTERSINK.

The COUNTERSINK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, shank_style: EXTERNALLY THREADED, body_diameter: 0.750 INCHES NOMINAL IN, included_angle: 100.0 DEGREES NOMINAL, overall_length: 1.060 INCHES NOMINAL IN, pilot_diameter: 0.309 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5133-01-321-9309, 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
166C011-309B5
NSN: 5133-01-321-9309
FSC: 5133 — Drill Bits, Counterbores, and Countersinks: Hand and Machine
CAGE: 75781 — ADEPT FASTENERS, INC. DIV INNOVATIVE TOOLING SERVICES (USA)
SPECIFICATIONS
materialSTEEL OVERALL
shank_styleEXTERNALLY THREADED
body_diameter0.750 INCHES NOMINAL IN
flute_quantity3
included_angle100.0 DEGREES NOMINAL
overall_length1.060 INCHES NOMINAL IN
pilot_diameter0.309 INCHES NOMINAL IN
thread_quantity24 PER INCH
thread_directionRIGHT-HAND
cutting_end_styleSPIRAL FLUTE BLUNT END
features_providedINTEGRAL PILOT
nominal_thread_diameter0.375 INCHES IN
NSN5133-01-321-9309
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available COUNTERSINK TITLE COMPONENT PN 166C011-309B5 MFR COUNTERSINK
KEY FEATURES
•
BODY DIAMETER: 0.750 INCHES NOMINAL IN
•
CUTTING END STYLE: SPIRAL FLUTE BLUNT END
•
NOMINAL THREAD DIAMETER: 0.375 INCHES IN
•
CUTTING ROTATION DIRECTION: RIGHT-HAND
•
FEATURES PROVIDED: INTEGRAL PILOT
•
THREAD DIRECTION: RIGHT-HAND
•
PILOT DIAMETER: 0.309 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
BODY DIAMETER0.750 INCHES NOMINAL IN
CUTTING END STYLESPIRAL FLUTE BLUNT END
OVERALL LENGTH1.060 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.375 INCHES IN
CUTTING ROTATION DIRECTIONRIGHT-HAND
FEATURES PROVIDEDINTEGRAL PILOT
THREAD DIRECTIONRIGHT-HAND
PILOT DIAMETER0.309 INCHES NOMINAL IN
SHANK STYLEEXTERNALLY THREADED
FLUTE QUANTITY3
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
5133PL1496669Reference document
Same NSN cross-reference
Reference document — Informative reference only
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 166C011-309B5?
166C011-309B5 is a COUNTERSINK.
What parts can replace 166C011-309B5?
There is 1 known substitute for 166C011-309B5: 5133PL1496669. Substitute compatibility should be verified for your specific system.
What is the NSN for 166C011-309B5?
166C011-309B5 is cataloged in the U.S. Government catalog under NSN 5133-01-321-9309. 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.