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OSG #4-40 UNC Straight Flute Hand Tap - Hand Taps for Mold & Tool Steels
OSGHand Taps for Mold & Tool Steels

OSG #4-40 UNC Straight Flute Hand Tap

OSG Hand Taps for Mold & Tool Steels.

SKU 3G-OTH-265676

Brand
OSG
Item
#4-40 UNC Straight Flute Hand Tap
Category
Hand Taps for Mold & Tool Steels
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Technical Specifications

OSG
Manufacturer Part Number
1745000

Technical Documents

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

Product Description

OSG Hand Taps for Mold & Tool Steels.

Frequently Asked Questions

What is the OSG Straight Flute Tap #4-40 UNC used for?

The OSG Straight Flute Tap #4-40 UNC is designed for threading holes in mold and tool steels. Its cobalt construction and plug chamfer make it suitable for general-purpose hand tapping in hardened materials up to 45 HRC, common in die and mold manufacturing.

What are the specifications of the OSG Straight Flute Tap #4-40 UNC?

This tap has a #4-40 UNC thread size, H2 tolerance for 2B-3B class fit, 3 flutes, and a plug chamfer. It is made from cobalt high-speed steel (MPN 1745000). OSG is the OEM brand. 3G Electric supplies this tap for worldwide delivery.

Where to buy the OSG Straight Flute Tap #4-40 UNC worldwide?

You can source the OSG Straight Flute Tap #4-40 UNC (MPN 1745000) from 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.

How to select the correct OSG Straight Flute Tap for mold steel?

For mold and tool steels, choose a tap with cobalt HSS for heat resistance and a plug chamfer for through-hole or blind-hole threading. The #4-40 UNC size matches the required thread. OSG taps are precision-ground; ensure the tap drill size matches the UNC specification for proper thread engagement.

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 hand taps for mold & tool steels. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Hand tap for threading mold and tool steels. Features a 1/4"-28 UNF thread size with H3 tolerance for 2B-3B class fit, 3 flutes, and a plug chamfer. Made from cobalt steel. Suitable for through-hole and blind-hole tapping in hardened materials
Hand tap for threading holes in mold and tool steels. Features a 1/4"-20 UNC thread size, H3 tolerance for 2B-3B class fit, 4 flutes, and a plug chamfer. Made from cobalt for wear resistance. Suitable for hand tapping operations in die and mold making
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Hand tap for threading holes in mold and tool steels. Features a 1/4"-20 UNC thread size, H3 tolerance for 2B-3B class fit, 4 flutes, and a plug chamfer. Made from cobalt for wear resistance. Suitable for hand tapping operations in die and mold making
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Hand tap for threading mold and tool steels. Features 5/16"-24 UNF thread, H3 tolerance for 2B-3B class fit, 4 flutes, plug chamfer, and cobalt steel construction. Suitable for precision tapping in hardened materials

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Straight flute hand tap for threading mold and tool steels. Features 3/8"-24 UNF thread size, H3 tolerance for 2B-3B class fit, 4 flutes, and plug chamfer. Cobalt construction provides heat resistance for through-hole or blind-hole applications in hardened materials
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