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APPROVED VENDOR Countersink: 90°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank - Threaded-Shank Three-Flute Countersinks
APPROVED VENDORThreaded-Shank Three-Flute Countersinks

APPROVED VENDOR Countersink: 90°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank

The APPROVED VENDOR Countersink is a threaded-shank three-flute countersink with a 90° angle, a 1/2 in body diameter, and a 1/4"-28 shank thread size. It is made of carbide and is identified by manufacturer part…

SKU 3G-OTH-186093

Brand
APPROVED VENDOR
Item
Countersink: 90°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank
Category
Threaded-Shank Three-Flute Countersinks
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Technical Specifications

APPROVED VENDOR
Manufacturer Part Number
421538
Type
Carbide
Flute
3
Shank
1/4"-28
Body Dia
1/2 in
Shank Thread Size
1/4"-28
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APPROVED VENDOR Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The APPROVED VENDOR Countersink is a threaded-shank three-flute countersink with a 90° angle, a 1/2 in body diameter, and a 1/4"-28 shank thread size. It is made of carbide and is identified by manufacturer part number 421538.

Frequently Asked Questions

What is the APPROVED VENDOR Countersink 421538 used for?

This 90° countersink creates a conical recess in metal or composite materials to allow a screw head to sit flush with the surface. It is commonly used in machining, tool-and-die, and assembly operations where precise chamfering and deburring of pre-drilled holes is required.

What are the specifications of the APPROVED VENDOR Countersink 421538?

The APPROVED VENDOR Countersink 421538 has a 90° angle, 3 flutes, a 1/2 in body diameter, and a 1/4"-28 threaded shank. It is made of carbide. The manufacturer part number is 421538. These specs ensure compatibility with standard thread-shank holders and consistent countersinking performance.

Where to buy the APPROVED VENDOR Countersink 421538 worldwide?

3G Electric supplies the APPROVED VENDOR Countersink 421538 to customers worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your facility. Contact our team to place an order or request a quote for this carbide threaded-shank countersink.

How to select the correct countersink for a machining application?

Select a countersink based on the required angle (e.g., 90° for standard flat-head screws), body diameter to match the screw head size, and shank type for your tool holder. The APPROVED VENDOR 421538 uses a 1/4"-28 threaded shank. Carbide construction offers durability for hard materials. Always verify shank thread compatibility with your machine.

Used in

Common applications for APPROVED VENDOR
Laboratory sampling — APPROVED VENDOR clear wide mouth glass bottles for collecting and storing liquid samples in non-sterile environments.
Steam heating maintenance — APPROVED VENDOR forged brass radiator valves for regulating steam flow in commercial building heating systems.
High-pressure cleaning — APPROVED VENDOR turbo spray nozzles for pressure washers used in industrial equipment cleaning up to 6,000 psi.
Cleanroom operations — APPROVED VENDOR vinyl task chairs for seating in ISO 5 classified manufacturing or assembly areas.
General sealing — APPROVED VENDOR natural rubber stoppers for closing laboratory flasks or test tubes in educational or research settings.
Tamper-evident security — APPROVED VENDOR brass lead and wire seals for securing utility meters, cargo containers, or access panels.

APPROVED VENDOR Products

3G Electric supplies APPROVED VENDOR threaded-shank three-flute countersinks. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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APPROVED VENDOR Countersink: 90°, 3 Flute, 3/32 in Body Dia, 1/4"-28 Shank, Carbide (MPN 421540). Key specifications — Shank Thread Size: 1/4"-28; Brand: APPROVED VENDOR.
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APPROVED VENDOR Countersink: 82°, 3 Flute, 7/16 in Body Dia, 1/4"-28 Shank, Carbide (MPN 421504). Key specifications — Shank Thread Size: 1/4"-28; Brand: APPROVED VENDOR.
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APPROVED VENDOR Countersink: 82°, 3 Flute, 7/16 in Body Dia, 1/4"-28 Shank, Carbide (MPN 421504). Key specifications — Shank Thread Size: 1/4"-28; Brand: APPROVED VENDOR.
APPROVED VENDOR Countersink: 100°, 3 Flute, 7/16 in Body Dia, 1/4"-28 Shank, Carbide (MPN 421551). Key specifications — Shank Thread Size: 1/4"-28; Brand: APPROVED VENDOR.
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APPROVED VENDOR Countersink: 100°, 3 Flute, 7/16 in Body Dia, 1/4"-28 Shank, Carbide (MPN 421551). Key specifications — Shank Thread Size: 1/4"-28; Brand: APPROVED VENDOR.
APPROVED VENDOR Countersink: 90°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank, Carbide (MPN 421536). Key specifications — Shank Thread Size: 1/4"-28; Brand: APPROVED VENDOR.
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APPROVED VENDOR Countersink: 90°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank, Carbide (MPN 421536). Key specifications — Shank Thread Size: 1/4"-28; Brand: APPROVED VENDOR.
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APPROVED VENDOR Countersink: 130°, 3 Flute, 7/16 in Body Dia, 1/4"-28 Shank, Carbide (MPN 421571). Key specifications — Shank Thread Size: 1/4"-28; Brand: APPROVED VENDOR.
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