We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

KEO Counterbore: For 1/2" Screw, 1/64" Oversized, 49/64 in Bore Dia, 0.515 in Pilot Dia - Oversized Built-in-Pilot Counterbores
KEOOversized Built-in-Pilot Counterbores

KEO Counterbore: For 1/2" Screw, 1/64" Oversized, 49/64 in Bore Dia, 0.515 in Pilot Dia

The KEO Counterbore is an oversized built-in-pilot counterbore designed for 1/2" screws. It features a 1/64" oversized bore diameter of 49/64 inches and a pilot diameter of 0.515 inches, constructed from cobalt. This…

SKU 3G-OTH-184287

Also listed as: 902000029 · 902 000 029

Brand
KEO
Item
Counterbore: For 1/2" Screw, 1/64" Oversized, 49/64 in Bore Dia, 0.515 in Pilot Dia
Category
Oversized Built-in-Pilot Counterbores
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

KEO
Manufacturer Part Number
902-000-029
Type
Cobalt
Bore Dia
49/64 in
Oversized
1/64"
Pilot Dia
0.515 in
Counterbore Type
Oversized

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

KEO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The KEO Counterbore is an oversized built-in-pilot counterbore designed for 1/2" screws. It features a 1/64" oversized bore diameter of 49/64 inches and a pilot diameter of 0.515 inches, constructed from cobalt. This product is identified by manufacturer part number 902-000-029.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the KEO oversized counterbore used for?

The KEO oversized counterbore is used to create a flat-bottomed recess for 1/2" screw heads in metalworking applications. Its built-in pilot aligns with an existing hole, and the 1/64" oversized bore provides clearance for screw head seating. 3G Electric supplies this cobalt tool for machining, aerospace, and industrial maintenance.

What are the specifications of the KEO counterbore 902-000-029?

This KEO counterbore has a 49/64 in bore diameter, 0.515 in pilot diameter, and is 1/64" oversized for 1/2" screws. It is made from cobalt and is identified by MPN 902-000-029. The oversized built-in-pilot design ensures precise alignment and clean counterboring in steel and alloys.

Where to buy KEO counterbore tools worldwide?

3G Electric supplies the KEO counterbore 902-000-029 to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial solutions provider, we source genuine KEO cutting tools and support procurement teams with technical guidance on tool selection and application.

How to select the correct KEO counterbore for a screw size?

Select a KEO counterbore where the pilot diameter matches your pre-drilled hole and the bore diameter matches the screw head plus clearance. For a 1/2" screw, this 49/64 in bore with 0.515 in pilot is designed for a 1/64" oversize fit. Always verify the screw head diameter and material hardness before ordering.

Used in

Common applications for KEO
Metalworking — KEO plain-tip center drills for creating accurate starting points in lathe operations
Automotive manufacturing — KEO bell-tip center drills for countersinking holes in engine components
Aerospace machining — KEO radius-tip center drills for reducing stress risers in critical parts
General machining — KEO keyseat cutters for milling keyways in shafts and gears
Tool and die making — KEO TiN-coated center drills for extended tool life in hardened steels
Precision engineering — KEO cobalt center drills for high-temperature alloy applications

KEO Products

3G Electric supplies KEO oversized built-in-pilot counterbores. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
KEO Counterbore: For 1/2" Screw, 1/32" Oversized, 25/32 in Bore Dia, 0.531 in Pilot Dia, Cobalt (MPN 902-000-030)
KEO
KEO Counterbore: For 1/2" Screw, 1/32" Oversized, 25/32 in Bore Dia, 0.531 in Pilot Dia, Cobalt (MPN 902-000-030)
KEO Counterbore: For 5/8" Screw, 1/32" Oversized, 63/64 in Bore Dia, 0.656 in Pilot Dia, Cobalt (MPN 902-000-033)
KEO
KEO Counterbore: For 5/8" Screw, 1/32" Oversized, 63/64 in Bore Dia, 0.656 in Pilot Dia, Cobalt (MPN 902-000-033)
KEO Counterbore: For 3/4" Screw, 1/32" Oversized, 1 13/64 in Bore Dia, 0.781 in Pilot Dia, Cobalt (MPN 902-000-035)
KEO
KEO Counterbore: For 3/4" Screw, 1/32" Oversized, 1 13/64 in Bore Dia, 0.781 in Pilot Dia, Cobalt (MPN 902-000-035)
KEO Counterbore: For 5/8" Screw, 1/64" Oversized, 31/32 in Bore Dia, 0.641 in Pilot Dia, Cobalt (MPN 902-000-032)
KEO
KEO Counterbore: For 5/8" Screw, 1/64" Oversized, 31/32 in Bore Dia, 0.641 in Pilot Dia, Cobalt (MPN 902-000-032)
KEO Counterbore: For 5/16" Screw, 1/32" Oversized, 1/2 in Bore Dia, 0.343 in Pilot Dia, Cobalt (MPN 902-000-021)
KEO
KEO Counterbore: For 5/16" Screw, 1/32" Oversized, 1/2 in Bore Dia, 0.343 in Pilot Dia, Cobalt (MPN 902-000-021)
KEO Counterbore: For 1/4" Screw, 1/64" Oversized, 25/64 in Bore Dia, 0.265 in Pilot Dia, Cobalt (MPN 902-000-017)
KEO
KEO Counterbore: For 1/4" Screw, 1/64" Oversized, 25/64 in Bore Dia, 0.265 in Pilot Dia, Cobalt (MPN 902-000-017)

More from KEO

View all KEO parts
KEO Counterbore: For 7/8" Screw, 1/32" Oversized, 1 25/64 in Bore Dia, 0.906 in Pilot Dia (MPN 902-000-180)
KEO
KEO Counterbore: For 7/8" Screw, 1/32" Oversized, 1 25/64 in Bore Dia, 0.906 in Pilot Dia (MPN 902-000-180)
KEO Counterbore: For 3/4" Screw, 1/32" Oversized, 1 13/64 in Bore Dia, 0.781 in Pilot Dia (MPN 902-000-299)
KEO
KEO Counterbore: For 3/4" Screw, 1/32" Oversized, 1 13/64 in Bore Dia, 0.781 in Pilot Dia (MPN 902-000-299)
KEO Counterbore: For #6 Screw, 1/64" Oversized, 1/4 in Bore Dia, 0.153 in Pilot Dia (MPN 902-000-326)
KEO
KEO Counterbore: For #6 Screw, 1/64" Oversized, 1/4 in Bore Dia, 0.153 in Pilot Dia (MPN 902-000-326)
KEO Counterbore: For 1" Screw, 1/32" Oversized, 1 19/32 in Bore Dia, 1.032 in Pilot Dia (MPN 902-000-186)
KEO
KEO Counterbore: For 1" Screw, 1/32" Oversized, 1 19/32 in Bore Dia, 1.032 in Pilot Dia (MPN 902-000-186)
KEO Counterbore: For #6 Screw, 1/64" Oversized, 1/4 in Bore Dia, 0.153 in Pilot Dia (MPN 902-000-093)
KEO
KEO Counterbore: For #6 Screw, 1/64" Oversized, 1/4 in Bore Dia, 0.153 in Pilot Dia (MPN 902-000-093)
KEO Counterbore: For 7/16" Screw, 1/64" Oversized, 43/64 in Bore Dia, 0.452 in Pilot Dia (MPN 902-000-308)
KEO
KEO Counterbore: For 7/16" Screw, 1/64" Oversized, 43/64 in Bore Dia, 0.452 in Pilot Dia (MPN 902-000-308)
KEO Counterbore: For #8 Screw, 1/32" Oversized, 19/64 in Bore Dia, 0.195 in Pilot Dia (MPN 902-000-105)
KEO
KEO Counterbore: For #8 Screw, 1/32" Oversized, 19/64 in Bore Dia, 0.195 in Pilot Dia (MPN 902-000-105)
KEO Counterbore: For 3/8" Screw, 1/64" Oversized, 19/32 in Bore Dia, 0.39 in Pilot Dia (MPN 902-000-311)
KEO
KEO Counterbore: For 3/8" Screw, 1/64" Oversized, 19/32 in Bore Dia, 0.39 in Pilot Dia (MPN 902-000-311)