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APPROVED VENDOR Countersink: 100°, 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: 100°, 3 Flute, 1/2 in Body Dia, 1/4"-28 Shank

The APPROVED VENDOR Countersink is a 100° threaded-shank three-flute countersink with 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 421556.

SKU 3G-OTH-186084

Brand
APPROVED VENDOR
Item
Countersink: 100°, 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
421556
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 100° threaded-shank three-flute countersink with 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 421556.

Frequently Asked Questions

What is the APPROVED VENDOR 421556 countersink used for?

The APPROVED VENDOR 421556 is a 100° three-flute countersink used to create a conical recess for flat-head screws in metalworking and machining applications. Its carbide construction provides durability for precision chamfering and deburring on ferrous and non-ferrous materials.

What are the specifications of the APPROVED VENDOR 421556 countersink?

The APPROVED VENDOR 421556 is a 100° three-flute countersink with a 1/2 in body diameter and a 1/4"-28 threaded shank. It is made of carbide and has manufacturer part number 421556. The shank thread size is 1/4"-28, designed for use with compatible holders.

Where to buy the APPROVED VENDOR 421556 countersink worldwide?

3G Electric supplies the APPROVED VENDOR 421556 countersink to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this carbide countersink.

How to select the correct countersink for a 100° flat-head screw?

To select the correct countersink, match the included angle to your screw head—100° for metric flat-head screws. Ensure the body diameter exceeds the screw head size. The APPROVED VENDOR 421556 with a 1/2 in body and 1/4"-28 shank suits many standard applications. Verify shank compatibility with your tool holder.

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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