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OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H4 / 2B-3B - Spiral-Flute STI Taps for Multiple Materials
OSGSpiral-Flute STI Taps for Multiple Materials

OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H4 / 2B-3B

OSG Spiral-Flute STI Taps for Multiple Materials.

SKU 3G-OTH-281190

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H4 / 2B-3B
Category
Spiral-Flute STI Taps for Multiple Materials
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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

OSG
Manufacturer Part Number
31504208

Technical Documents

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

Product Description

OSG Spiral-Flute STI Taps for Multiple Materials.

Frequently Asked Questions

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

This OSG spiral-flute STI tap is designed for cutting internal threads in multiple materials before installing screw thread inserts. It is commonly used in aerospace, automotive, and general manufacturing applications where reliable thread repair or reinforcement is required.

What are the specifications of the OSG 31504208 STI tap?

The OSG 31504208 is a spiral-flute STI tap with a 1"-12 UNF thread size, H4 / 2B-3B tolerance, and 4 flutes. It is designed for multiple materials and is manufactured under part number 31504208. The H4 tolerance ensures proper fit for thread insert installation.

Where to buy OSG STI taps in worldwide?

You can source OSG STI taps like the 31504208 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide locations. Contact us for availability and lead time on this item.

How to select the correct STI tap for thread inserts?

Select an STI tap that matches the thread insert's size and tolerance, such as the OSG 31504208 for 1"-12 UNF inserts. Ensure the tap's H4 tolerance aligns with the insert's requirements. Use proper cutting fluid and follow manufacturer guidelines for material-specific speeds and feeds.

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 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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Compatible alternatives & equivalents

Cross-referenced by specification & description
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H4 / 2B-3B, 4 Flute (MPN 31504201)
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H4 / 2B-3B, 4 Flute (MPN 31504201)
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H6 / 2B-3B, 4 Flute (MPN 31504301)
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H6 / 2B-3B, 4 Flute (MPN 31504301)
Spiral-flute STI tap for cutting internal threads in multiple materials to accept screw thread inserts. Features a 1"-12 UNF thread size, H6 / 2B-3B tolerance, and 4-flute design. Suitable for applications requiring strong threads in softer base materials
OSG
Spiral-flute STI tap for cutting internal threads in multiple materials to accept screw thread inserts. Features a 1"-12 UNF thread size, H6 / 2B-3B tolerance, and 4-flute design. Suitable for applications requiring strong threads in softer base materials
OSG Screw Thread Insert STI Tap: Spiral Fute, 7/8"-14 UNF, H4 / 2B-3B, 4 Flute (MPN 31503901)
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 7/8"-14 UNF, H4 / 2B-3B, 4 Flute (MPN 31503901)
OSG Screw Thread Insert STI Tap: Spiral Fute, 7/8"-14 UNF, H4 / 2B-3B, 4 Flute (MPN 31503908)
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 7/8"-14 UNF, H4 / 2B-3B, 4 Flute (MPN 31503908)
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H4 / 2B-3B, 4 Flute (MPN 31504001)
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H4 / 2B-3B, 4 Flute (MPN 31504001)

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