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OSG Screw Thread Insert STI Tap: Spiral Point, 5/8"-18 UNF, H4 / 2B-3B, 4 Flute - Spiral-Point STI Taps for Multiple Materials
OSGSpiral-Point STI Taps for Multiple Materials

OSG Screw Thread Insert STI Tap: Spiral Point, 5/8"-18 UNF, H4 / 2B-3B, 4 Flute

The OSG Screw Thread Insert STI Tap is a spiral-point tap designed for threading multiple materials, featuring a 5/8"-18 UNF thread size, H4 / 2B-3B tolerance, 4 flutes, and a plug chamfer (MPN 31403101). This tool…

SKU 3G-OTH-284742

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Point, 5/8"-18 UNF, H4 / 2B-3B, 4 Flute
Category
Spiral-Point STI Taps for Multiple Materials
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Technical Specifications

OSG
Manufacturer Part Number
31403101
Type
H4 / 2B-3B, Plug Chamfer
Flute
4
UNF
5/8"-18
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Screw Thread Insert STI Tap is a spiral-point tap designed for threading multiple materials, featuring a 5/8"-18 UNF thread size, H4 / 2B-3B tolerance, 4 flutes, and a plug chamfer (MPN 31403101). This tool is engineered for creating threads compatible with screw thread inserts, with the spiral-point design aiding chip evacuation during operation.

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 OSG Screw Thread Insert STI Tap used for?

The OSG Screw Thread Insert STI Tap is used to cut internal threads in multiple materials for installing screw thread inserts. It is commonly applied in aerospace, automotive, and general manufacturing where thread repair or reinforcement is needed. The spiral-point design pushes chips forward, enabling efficient through-hole tapping.

What are the specifications of the OSG STI Tap 31403101?

The OSG STI Tap 31403101 has a UNF thread size of 5/8"-18, a thread limit of H4 / 2B-3B, 4 flutes, and a plug chamfer. It is a spiral-point tap designed for through-hole applications in multiple materials. The H4 tolerance ensures proper fit for STI inserts, and the plug chamfer allows for easier starting.

Where to buy the OSG STI Tap 31403101 worldwide?

You can source the OSG STI Tap 31403101 worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we provide competitive pricing and reliable sourcing for this OSG tap.

How to select the correct OSG STI tap for thread inserts?

To select the correct OSG STI tap, match the tap thread size and pitch to the insert's internal thread requirement. For the 5/8"-18 UNF tap, ensure the insert is designed for that thread. The H4 / 2B-3B tolerance provides proper fit for standard inserts. Use a plug chamfer for through holes and spiral-point geometry for chip evacuation.

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 spiral-point sti taps for multiple materials. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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