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

OSG Screw Thread Insert STI Tap: Straight Fute, 5/16"-24 UNF, H2 / 2B-3B, 4 Flute - General Purpose STI Taps
OSGGeneral Purpose STI Taps

OSG Screw Thread Insert STI Tap: Straight Fute, 5/16"-24 UNF, H2 / 2B-3B, 4 Flute

SKU 3G-OTH-262110

Brand
OSG
Item
Screw Thread Insert STI Tap: Straight Fute, 5/16"-24 UNF, H2 / 2B-3B, 4 Flute
Category
General Purpose 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
12600500
Type
H2 / 2B-3B, Plug Chamfer
Flute
4
UNF
5/16"-24
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

Frequently Asked Questions

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

An OSG STI tap cuts internal threads in a workpiece to accept a screw thread insert (Heli-Coil type). It is used in aerospace, automotive, and general manufacturing to repair or reinforce stripped threads in aluminum, steel, and cast iron.

What are the specifications of the OSG 12600500 STI Tap?

This OSG STI tap has a 5/16"-24 UNF thread, H2 / 2B-3B tolerance, 4 flutes, and a plug chamfer. It is designed for general-purpose thread repair and reinforcement. The straight flute geometry provides good chip evacuation in through-hole applications.

Where to buy OSG STI Taps worldwide?

3G Electric supplies OSG STI taps worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for a quote on the OSG 12600500 or other thread repair tooling. We source genuine industrial cutting tools for global customers.

How to select the correct STI tap size for a thread insert?

Select an STI tap that matches the thread insert's nominal size and pitch. For a 5/16"-24 UNF insert, use the OSG 12600500 STI tap. Always verify the tap's H tolerance (e.g., H2) matches the required class of fit (2B or 3B) for the insert application.

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 general purpose 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: Straight Fute, 5/8"-18 UNF, H3 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12602700). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 5/8"-18 UNF, H3 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12602700). Key specifications — attr1299996: H3 / 2B-3B.
OSG Screw Thread Insert STI Tap: Straight Fute, 1/2"-20 UNF, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12601300). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 1/2"-20 UNF, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12601300). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Straight Fute, 3/4"-16 UNF, H3 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12603500). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 3/4"-16 UNF, H3 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12603500). Key specifications — attr1299996: H3 / 2B-3B.
OSG Screw Thread Insert STI Tap: Straight Fute, 5/8"-18 UNF, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12602900). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 5/8"-18 UNF, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12602900). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Straight Fute, 7/16"-20 UNF, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12600900). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 7/16"-20 UNF, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12600900). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Straight Fute, 7/8"-14 UNF, H3 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12604300). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 7/8"-14 UNF, H3 / 2B-3B, 4 Flute, Plug Chamfer (MPN 12604300). Key specifications — attr1299996: H3 / 2B-3B.

More from OSG

View all OSG parts
OSG Screw Thread Insert STI Tap: Straight Fute, 1/2"-20 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 12601400). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 1/2"-20 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 12601400). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Straight Fute, 1/2"-20 UNF, H3 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 1813900). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 1/2"-20 UNF, H3 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 1813900). Key specifications — attr1299996: H3 / 2B-3B.
OSG Screw Thread Insert STI Tap: Straight Fute, 5/8"-11 UNC, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 12602600). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 5/8"-11 UNC, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 12602600). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Straight Fute, 3/4"-16 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 12603800). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 3/4"-16 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 12603800). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Straight Fute, #3-48 UNC, H2 / 2B-3B, 3 Flute, Plug Chamfer (MPN 6003200). Key specifications — attr1299996: H2 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, #3-48 UNC, H2 / 2B-3B, 3 Flute, Plug Chamfer (MPN 6003200). Key specifications — attr1299996: H2 / 2B-3B.
OSG Screw Thread Insert STI Tap: Straight Fute, 7/16"-14 UNC, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 6019800). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 7/16"-14 UNC, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 6019800). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Straight Fute, M3x0.5 Metric, D2 / 4H-6H, 3 Flute, High Speed Steel (MPN 12800300). Key specifications — attr1299996: D2 / 4H-6H.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, M3x0.5 Metric, D2 / 4H-6H, 3 Flute, High Speed Steel (MPN 12800300). Key specifications — attr1299996: D2 / 4H-6H.
OSG Screw Thread Insert STI Tap: Straight Fute, 7/16"-20 UNF, H3 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 1813500). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Straight Fute, 7/16"-20 UNF, H3 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 1813500). Key specifications — attr1299996: H3 / 2B-3B.