Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 1/4" Mill Dia - Double-End Cobalt Square End Mills
OSGDouble-End Cobalt Square End Mills

OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 1/4" Mill Dia

The OSG Square End Mill is a TiN Coated, Double-End Cobalt Square End Mill (MPN 5420305) with a 1/4" mill diameter, 5/8" length of cut, 3-3/8" overall length, and 4 flutes. 3G Electric interprets this demand and…

SKU 3G-OTH-232361

Brand
OSG
Item
Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 1/4" Mill Dia
Category
Double-End Cobalt Square End Mills
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 — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

OSG
Manufacturer Part Number
5420305
Type
TiN Coated, Double End
Mill Dia
1/4"
OAL
3-3/8"
Flute
4
LOC
5/8"

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

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

Product Description

The OSG Square End Mill is a TiN Coated, Double-End Cobalt Square End Mill (MPN 5420305) with a 1/4" mill diameter, 5/8" length of cut, 3-3/8" overall length, and 4 flutes. 3G Electric interprets this demand and sources this genuine industrial cutting tool across 14 departments, with specialist depth in controls and pumps as an authorised distributor.

Frequently Asked Questions

What is the OSG 5420305 square end mill used for?

The OSG 5420305 is a double-end cobalt square end mill used for general-purpose milling, slotting, and profiling in ferrous and non-ferrous materials. Its TiN coating reduces friction and heat, making it suitable for machining steels, cast iron, and alloys in industrial manufacturing and tool-and-die applications.

What are the specifications of the OSG 5420305 end mill?

The OSG 5420305 is a double-end cobalt square end mill with a 1/4" mill diameter, 5/8" length of cut (LOC), and 3-3/8" overall length (OAL). It has 4 flutes and a TiN coating. The manufacturer part number is 5420305, and it is designed for precision milling in metalworking.

Where to buy OSG 5420305 end mills worldwide?

You can source the OSG 5420305 square end mill through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine OSG tooling for international procurement needs.

How to select the correct OSG square end mill for your application?

To select the correct OSG square end mill, match the mill diameter and length of cut to your workpiece geometry. For general milling of steel or cast iron, the 5420305 with 4 flutes and TiN coating offers good chip evacuation and wear resistance. Always verify shank compatibility with your machine tool holder.

Used in

Common applications for OSG
Automotive engine block production — OSG micro drill bits for oil gallery and coolant passage drilling in cast iron
Medical device manufacturing — OSG micro drill bits for drilling bone screw pilot holes in stainless steel implants
Aerospace component machining — OSG micro drill bits for fastener holes in titanium alloy structural parts
Mold and die making — OSG micro drill bits for cooling channel drilling in hardened tool steel (HRC 45-50)
Electronics enclosure fabrication — OSG micro drill bits for precision holes in aluminum alloy housings (with appropriate coating selection)
General engineering job shops — OSG micro drill bits for small-diameter hole drilling in mild steel and alloy steel parts

OSG Products

3G Electric supplies OSG double-end cobalt square end mills. 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
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 3/4" Mill Dia, 1-5/8" LOC, 5-5/8" OAL (MPN 5423105)
OSG
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 3/4" Mill Dia, 1-5/8" LOC, 5-5/8" OAL (MPN 5423105)
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 3/16" Mill Dia, 1/2" LOC, 3-1/4" OAL (MPN 5420205)
OSG
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 3/16" Mill Dia, 1/2" LOC, 3-1/4" OAL (MPN 5420205)
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 1/8" Mill Dia, 3/8" LOC, 3-1/16" OAL (MPN 5420105)
OSG
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 1/8" Mill Dia, 3/8" LOC, 3-1/16" OAL (MPN 5420105)
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 5/16" Mill Dia, 3/4" LOC, 3-1/2" OAL (MPN 5420405)
OSG
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 5/16" Mill Dia, 3/4" LOC, 3-1/2" OAL (MPN 5420405)
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 5/8" Mill Dia, 1-3/8" LOC, 5" OAL (MPN 5422105)
OSG
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 5/8" Mill Dia, 1-3/8" LOC, 5" OAL (MPN 5422105)
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 7/16" Mill Dia, 1" LOC, 4-1/8" OAL (MPN 5429605)
OSG
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 7/16" Mill Dia, 1" LOC, 4-1/8" OAL (MPN 5429605)

More from OSG

View all OSG parts
OSG Square End Mill: Cobalt, Double End, 2 Flute, 6 mm Mill Dia, 1/2" LOC, 79.3 mm OAL (MPN 5820400)
OSG
OSG Square End Mill: Cobalt, Double End, 2 Flute, 6 mm Mill Dia, 1/2" LOC, 79.3 mm OAL (MPN 5820400)
OSG Square End Mill: Cobalt, Double End, 2 Flute, 22 mm Mill Dia, 39.68 mm LOC, 139.7 mm OAL (MPN 5824100)
OSG
OSG Square End Mill: Cobalt, Double End, 2 Flute, 22 mm Mill Dia, 39.68 mm LOC, 139.7 mm OAL (MPN 5824100)
OSG Square End Mill: Cobalt, Double End, 4 Flute, 1/16" Mill Dia, 0.177" LOC, 2-1/4" OAL (MPN 5677200)
OSG
OSG Square End Mill: Cobalt, Double End, 4 Flute, 1/16" Mill Dia, 0.177" LOC, 2-1/4" OAL (MPN 5677200)
OSG Square End Mill: Cobalt, Double End, 3 Flute, 7/8" Mill Dia, 1-7/8" LOC, 6-1/8" OAL (MPN 5324100)
OSG
OSG Square End Mill: Cobalt, Double End, 3 Flute, 7/8" Mill Dia, 1-7/8" LOC, 6-1/8" OAL (MPN 5324100)
OSG Square End Mill: Cobalt, Double End, 2 Flute, 13 mm Mill Dia, 28.57 mm LOC, 114.3 mm OAL (MPN 5821200)
OSG
OSG Square End Mill: Cobalt, Double End, 2 Flute, 13 mm Mill Dia, 28.57 mm LOC, 114.3 mm OAL (MPN 5821200)
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 7/8" Mill Dia, 1-7/8" LOC, 6-1/8" OAL (MPN 5424105)
OSG
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 7/8" Mill Dia, 1-7/8" LOC, 6-1/8" OAL (MPN 5424105)
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 3/8" Mill Dia, 3/4" LOC, 3-1/2" OAL (MPN 5420505)
OSG
OSG Square End Mill: Cobalt, TiN Coated, Double End, 4 Flute, 3/8" Mill Dia, 3/4" LOC, 3-1/2" OAL (MPN 5420505)
OSG Square End Mill: Cobalt, Double End, 2 Flute, 1/32" Mill Dia, 3/64" LOC, 2" OAL (MPN 5627000)
OSG
OSG Square End Mill: Cobalt, Double End, 2 Flute, 1/32" Mill Dia, 3/64" LOC, 2" OAL (MPN 5627000)