Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H6 / 2B-3B, 4 Flute - Spiral-Flute STI Taps
OSGSpiral-Flute STI Taps

OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H6 / 2B-3B, 4 Flute

The OSG Screw Thread Insert STI Tap (MPN 10802500) is a spiral-flute tap for 1"-8 UNC threads, with a bottoming chamfer and 4 flutes. It is ground to H6 / 2B-3B tolerance class, ensuring accurate thread fit for STI…

SKU 3G-OTH-273393

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H6 / 2B-3B, 4 Flute
Category
Spiral-Flute STI Taps
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

OSG
Manufacturer Part Number
10802500
Type
H6 / 2B-3B, Bottoming Chamfer
Flute
4
UNC
1"-8
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The OSG Screw Thread Insert STI Tap (MPN 10802500) is a spiral-flute tap for 1"-8 UNC threads, with a bottoming chamfer and 4 flutes. It is ground to H6 / 2B-3B tolerance class, ensuring accurate thread fit for STI inserts. 3G Electric interprets your demand for this precision threading tool, sources it from OSG, and supports your application with specialist expertise across 14 industrial departments.

Frequently Asked Questions

What is an OSG spiral-flute STI tap used for?

An OSG spiral-flute STI tap is used to cut internal threads in a pre-drilled hole before installing a screw thread insert. It is designed for UNC 1"-8 threads and is commonly used in industrial maintenance, automotive, and aerospace applications where thread repair or reinforcement is required.

What are the specifications of the OSG STI tap 10802500?

The OSG STI tap model 10802500 has a UNC thread size of 1"-8, a spiral-flute design with 4 flutes, and a bottoming chamfer. It is ground to H6 tolerance for 2B-3B class fit. This tap is specifically made for installing screw thread inserts and is manufactured by OSG.

Where to buy OSG STI taps in 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 10802500 spiral-flute STI 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—here UNC 1"-8. Use a bottoming chamfer for blind holes and a spiral-flute design for chip evacuation. Ensure the tap tolerance (H6) aligns with the required class fit (2B-3B) for proper insert 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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10802400). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10802400). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H6 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10802700). Key specifications — attr1299996: H6 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H6 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10802700). Key specifications — attr1299996: H6 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 7/8"-14 UNF, H3 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10802200). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 7/8"-14 UNF, H3 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10802200). Key specifications — attr1299996: H3 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 7/8"-9 UNC, H3 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10802000). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 7/8"-9 UNC, H3 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10802000). Key specifications — attr1299996: H3 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, #6-32 UNC, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8005400). Key specifications — attr1299996: H2 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, #6-32 UNC, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8005400). Key specifications — attr1299996: H2 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, #8-32 UNC, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8006900). Key specifications — attr1299996: H2 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, #8-32 UNC, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8006900). Key specifications — attr1299996: H2 / 2B-3B.

More from OSG

View all OSG parts →
OSG Screw Thread Insert STI Tap: Spiral Fute, 5/8"-11 UNC, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10801300). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 5/8"-11 UNC, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10801300). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, #10-32 UNF, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8008700). Key specifications — attr1299996: H2 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, #10-32 UNF, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 8008700). Key specifications — attr1299996: H2 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10802300). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10802300). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 9/16"-12 UNC, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10800900). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 9/16"-12 UNC, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10800900). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 9/16"-12 UNC, H3 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10800800). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 9/16"-12 UNC, H3 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10800800). Key specifications — attr1299996: H3 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, M2x0.4 Metric, D2 / 2B-3B, 2 Flute, High Speed Steel (MPN 10900100). Key specifications — attr1299996: D2 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, M2x0.4 Metric, D2 / 2B-3B, 2 Flute, High Speed Steel (MPN 10900100). Key specifications — attr1299996: D2 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 3/4"-16 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10801900). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 3/4"-16 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 10801900). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, M14x2 Metric, D5 / 4H-6H, 4 Flute, High Speed Steel (MPN 10901000). Key specifications — attr1299996: D5 / 4H-6H.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, M14x2 Metric, D5 / 4H-6H, 4 Flute, High Speed Steel (MPN 10901000). Key specifications — attr1299996: D5 / 4H-6H.