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OSG Screw Thread Insert STI Tap: Spiral Fute, 1/4"-28 UNF, H2 / 2B-3B, 3 Flute - Spiral-Flute STI Taps
OSGSpiral-Flute STI Taps

OSG Screw Thread Insert STI Tap: Spiral Fute, 1/4"-28 UNF, H2 / 2B-3B, 3 Flute

The OSG Screw Thread Insert STI Tap (SKU 8011800, MPN 8011800) is a spiral-flute tap designed for 1/4"-28 UNF threads. It features a bottoming chamfer, three flutes, and an H2 / 2B-3B tolerance class, enabling thread…

SKU 3G-OTH-273367

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 1/4"-28 UNF, H2 / 2B-3B, 3 Flute
Category
Spiral-Flute STI Taps
Available to Order
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

OSG
Manufacturer Part Number
8011800
Type
H2 / 2B-3B, Bottoming Chamfer
Flute
3
UNF
1/4"-28

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

Product Description

The OSG Screw Thread Insert STI Tap (SKU 8011800, MPN 8011800) is a spiral-flute tap designed for 1/4"-28 UNF threads. It features a bottoming chamfer, three flutes, and an H2 / 2B-3B tolerance class, enabling thread cutting for screw thread inserts. 3G Electric interprets this demand and supplies this genuine OSG tool across 14 industrial departments, with specialist depth in cutting tools and controls.

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?

This OSG spiral-flute STI tap is used to cut internal threads in a workpiece before installing a screw thread insert. It is designed for 1/4"-28 UNF threads and is commonly used in aerospace, automotive, and general manufacturing where thread repair or reinforcement is needed.

What are the specifications of the OSG 8011800 STI tap?

The OSG 8011800 is a spiral-flute STI tap with a 1/4"-28 UNF thread size, H2 / 2B-3B tolerance, 3 flutes, and a bottoming chamfer. It is designed for tapping holes that will accept screw thread inserts, ensuring precise thread fit for insert installation.

Where to buy OSG STI taps in worldwide?

You can source the OSG 8011800 STI tap 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 and other OSG tooling.

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

Select an STI tap based on the thread insert's size and pitch, such as 1/4"-28 UNF. Ensure the tap has the correct tolerance (e.g., H2 / 2B-3B) and chamfer type—bottoming for blind holes. OSG taps are designed to produce threads that match insert specifications for reliable installation.

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. 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, 1/4"-20 UNC, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8010900)
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 1/4"-20 UNC, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8010900)
OSG Screw Thread Insert STI Tap: Spiral Fute, 5/16"-24 UNF, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8013600)
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OSG Screw Thread Insert STI Tap: Spiral Fute, 5/16"-24 UNF, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8013600)
Spiral-flute STI tap for cutting internal threads prior to installing screw thread inserts. Features a 3/8"-24 UNF thread size, H2 / 2B-3B tolerance class, bottoming chamfer, and three flutes. The spiral flute design aids chip evacuation in blind-hole applications
OSG
Spiral-flute STI tap for cutting internal threads prior to installing screw thread inserts. Features a 3/8"-24 UNF thread size, H2 / 2B-3B tolerance class, bottoming chamfer, and three flutes. The spiral flute design aids chip evacuation in blind-hole applications
OSG Screw Thread Insert STI Tap: Spiral Fute, 1/4"-20 UNC, H3 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8011200)
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 1/4"-20 UNC, H3 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8011200)
OSG Screw Thread Insert STI Tap: Spiral Fute, 3/4"-16 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10801900)
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 3/4"-16 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10801900)
OSG Screw Thread Insert STI Tap: Spiral Fute, 5/16"-18 UNC, H4 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8013300)
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 5/16"-18 UNC, H4 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8013300)

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