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OSG Screw Thread Insert STI Tap: Spiral Fute, 5/8"-18 UNF, H4 / 2B-3B, 4 Flute - Spiral-Flute STI Taps for Steel & Stainless Steel
OSGSpiral-Flute STI Taps for Steel & Stainless Steel

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

The OSG Screw Thread Insert STI Tap is a spiral-flute tap for steel and stainless steel, specified as 5/8"-18 UNF with a H4 / 2B-3B tolerance and bottoming chamfer. It features 4 flutes and carries manufacturer part…

SKU 3G-OTH-244408

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

OSG
Manufacturer Part Number
30204308
Type
H4 / 2B-3B, Bottoming 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-flute tap for steel and stainless steel, specified as 5/8"-18 UNF with a H4 / 2B-3B tolerance and bottoming chamfer. It features 4 flutes and carries manufacturer part number 30204308.

Frequently Asked Questions

What is an OSG Screw Thread Insert STI Tap used for?

An OSG Screw Thread Insert STI Tap is used to cut internal threads in steel and stainless steel for installing helical wire thread inserts. It is commonly applied in aerospace, automotive, and industrial maintenance to repair or reinforce stripped threads without replacing the parent component.

What are the specifications of the OSG 30204308 STI Tap?

The OSG 30204308 STI Tap has a UNF thread size of 5/8"-18, with a H4 / 2B-3B tolerance class. It features 4 spiral flutes and a bottoming chamfer for threading blind holes. This spiral-flute design efficiently evacuates chips upward, making it suitable for steel and stainless steel.

Where to buy OSG STI Taps worldwide?

You can source OSG STI Taps 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 on the OSG 30204308 or other OSG threading tools.

How to select the correct OSG STI Tap for a thread repair job?

To select the correct OSG STI Tap, match the tap's thread size (e.g., 5/8"-18 UNF) and tolerance (H4 / 2B-3B) to the insert and parent material. For steel or stainless steel, choose a spiral-flute design with bottoming chamfer for blind holes. Always verify the insert manufacturer's recommended tap specifications.

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-flute sti taps for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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