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

OSG Spiral-Flute STI Tap, 7/8"-9 UNC, H5 Tolerance, 4 Flutes - Spiral-Flute STI Taps for Steel & Stainless Steel
OSGSpiral-Flute STI Taps for Steel & Stainless Steel

OSG Spiral-Flute STI Tap, 7/8"-9 UNC, H5 Tolerance, 4 Flutes

OSG Spiral-Flute STI Taps for Steel & Stainless Steel.

SKU 3G-OTH-244284

Brand
OSG
Item
Spiral-Flute STI Tap, 7/8"-9 UNC, H5 Tolerance, 4 Flutes
Category
Spiral-Flute STI Taps for Steel & Stainless Steel
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
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

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

OSG
Manufacturer Part Number
30205408

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

OSG Spiral-Flute STI Taps for Steel & Stainless Steel.

Frequently Asked Questions

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

The OSG Screw Thread Insert STI Tap is used to cut internal threads in steel and stainless steel for installing screw thread inserts. It is commonly applied in automotive, aerospace, and general manufacturing where strong, wear-resistant threads are required in softer base materials.

What are the specifications of the OSG STI Tap 30205408?

The OSG STI Tap model 30205408 has a thread size of 7/8"-9 UNC, with a spiral flute design and 4 flutes. It is ground to H5 tolerance for 2B-3B class fit. This tap is designed for threading holes that will accept screw thread inserts in steel and stainless steel workpieces.

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 30205408 tap.

How to select the correct OSG STI Tap for steel?

To select the correct OSG STI Tap for steel, match the thread size and pitch to your insert requirements. For steel and stainless steel, choose a spiral flute tap like the OSG 30205408 to evacuate chips. Ensure the tap tolerance (e.g., H5) aligns with the desired thread class (2B-3B).

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
This spiral-flute STI tap is designed for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. It features a 7/8"-9 UNC thread size with H5 tolerance for 2B-3B class fit and 4 flutes. Typical applications include thread repair and reinforcement in industrial components
OSG
This spiral-flute STI tap is designed for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. It features a 7/8"-9 UNC thread size with H5 tolerance for 2B-3B class fit and 4 flutes. Typical applications include thread repair and reinforcement in industrial components
Spiral-flute STI tap for cutting internal threads in steel and stainless steel prior to installing screw thread inserts. Features a 7/8"-9 UNC thread size, H5 / 2B-3B tolerance, bottoming chamfer, and 4 flutes. Suitable for general manufacturing applications requiring strong threads
OSG
Spiral-flute STI tap for cutting internal threads in steel and stainless steel prior to installing screw thread inserts. Features a 7/8"-9 UNC thread size, H5 / 2B-3B tolerance, bottoming chamfer, and 4 flutes. Suitable for general manufacturing applications requiring strong threads
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accommodate helical wire thread inserts. Thread size 7/8"-9 UNC with H3 / 2B-3B tolerance class. Four-flute design aids chip evacuation. Manufacturer part number 30205201
OSG
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accommodate helical wire thread inserts. Thread size 7/8"-9 UNC with H3 / 2B-3B tolerance class. Four-flute design aids chip evacuation. Manufacturer part number 30205201
This OSG spiral-flute STI tap cuts internal threads in steel and stainless steel for installing helical wire thread inserts. It features a thread size of 7/8"-9 UNC, 4 flutes, and a ground thread tolerance of H3 / 2B-3B. Commonly used in applications where stripped threads must be restored to original strength without replacing the component
OSG
This OSG spiral-flute STI tap cuts internal threads in steel and stainless steel for installing helical wire thread inserts. It features a thread size of 7/8"-9 UNC, 4 flutes, and a ground thread tolerance of H3 / 2B-3B. Commonly used in applications where stripped threads must be restored to original strength without replacing the component
Spiral-flute STI tap for cutting internal threads in steel and stainless steel. UNC thread size 7/8"-9, tolerance H5 / 2B-3B, 4 flutes, bottoming chamfer for blind holes. Used to prepare holes for screw thread inserts
OSG
Spiral-flute STI tap for cutting internal threads in steel and stainless steel. UNC thread size 7/8"-9, tolerance H5 / 2B-3B, 4 flutes, bottoming chamfer for blind holes. Used to prepare holes for screw thread inserts
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept screw thread inserts. Thread size 3/4"-10 UNC with H5 tolerance for 2B-3B class fit. 4-flute design aids chip evacuation. Used in applications requiring strong, wear-resistant threads
OSG
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept screw thread inserts. Thread size 3/4"-10 UNC with H5 tolerance for 2B-3B class fit. 4-flute design aids chip evacuation. Used in applications requiring strong, wear-resistant threads

More from OSG

View all OSG parts
OSG Screw Thread Insert STI Tap: Spiral Fute, M14x2 Metric, D5 / 4H-6H, 4 Flute (MPN 34301001)
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, M14x2 Metric, D5 / 4H-6H, 4 Flute (MPN 34301001)
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. Features a 5/8"-18 UNF thread, H3 / 2B-3B tolerance, and 4 flutes. The spiral flute design aids chip evacuation during threading operations
OSG
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. Features a 5/8"-18 UNF thread, H3 / 2B-3B tolerance, and 4 flutes. The spiral flute design aids chip evacuation during threading operations
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. Features M2x0.4 metric thread, D2 / 2B-3B tolerance, and 2 flutes. Used in applications requiring thread repair or reinforcement in demanding materials
OSG
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. Features M2x0.4 metric thread, D2 / 2B-3B tolerance, and 2 flutes. Used in applications requiring thread repair or reinforcement in demanding materials
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. Thread size 3/8"-16 UNC, 3 flutes, tolerance class H4 / 2B-3B. Suitable for repair or reinforcement of threaded holes in demanding materials
OSG
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. Thread size 3/8"-16 UNC, 3 flutes, tolerance class H4 / 2B-3B. Suitable for repair or reinforcement of threaded holes in demanding materials
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. Features 5/16"-18 UNC thread size, H4 / 2B-3B tolerance, and 3 flutes. Used in applications such as automotive, aerospace, and heavy equipment repair where stripped threads must be restored
OSG
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. Features 5/16"-18 UNC thread size, H4 / 2B-3B tolerance, and 3 flutes. Used in applications such as automotive, aerospace, and heavy equipment repair where stripped threads must be restored
This OSG spiral-flute STI tap cuts internal threads in steel and stainless steel to accept helical wire thread inserts. It features a #10-24 UNC thread size, H2 / 2B-3B tolerance, and a 3-flute design. Suitable for thread repair and reinforcement in demanding applications
OSG
This OSG spiral-flute STI tap cuts internal threads in steel and stainless steel to accept helical wire thread inserts. It features a #10-24 UNC thread size, H2 / 2B-3B tolerance, and a 3-flute design. Suitable for thread repair and reinforcement in demanding applications
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. Features a 1"-8 UNC thread size, H6 / 2B-3B tolerance, and 4 flutes. The spiral flute design evacuates chips upward, making it suitable for blind-hole thread repair applications
OSG
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. Features a 1"-8 UNC thread size, H6 / 2B-3B tolerance, and 4 flutes. The spiral flute design evacuates chips upward, making it suitable for blind-hole thread repair applications
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. #8-32 UNC, H2 / 2B-3B tolerance, bottoming chamfer, 3 flutes. Manufacturer part number 0145208
OSG
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. #8-32 UNC, H2 / 2B-3B tolerance, bottoming chamfer, 3 flutes. Manufacturer part number 0145208