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: Spiral Point, #6-40 UNF, H3 / 2B-3B, 3 Flute - Spiral-Point STI Taps for Steel & Stainless Steel
OSGSpiral-Point STI Taps for Steel & Stainless Steel

OSG Screw Thread Insert STI Tap: Spiral Point, #6-40 UNF, H3 / 2B-3B, 3 Flute

The OSG Screw Thread Insert STI Tap: Spiral Point (MPN 30100308) is a #6-40 UNF, H3 / 2B-3B, Plug Chamfer tap with 3 flutes, designed for threading steel and stainless steel. 3G Electric sources this genuine OSG tool…

SKU 3G-OTH-265355

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Point, #6-40 UNF, H3 / 2B-3B, 3 Flute
Category
Spiral-Point 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
30100308
Type
#6-40 UNF, H3 / 2B-3B, Plug Chamfer
Flute
3

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: Spiral Point (MPN 30100308) is a #6-40 UNF, H3 / 2B-3B, Plug Chamfer tap with 3 flutes, designed for threading steel and stainless steel. 3G Electric sources this genuine OSG tool as part of our industrial supply across 14 departments, with specialist expertise in combustion, pumps, and controls.

Frequently Asked Questions

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

An OSG Screw Thread Insert STI Tap is used to cut internal threads in steel and stainless steel for installing helical wire thread inserts. It is commonly applied in aerospace, automotive, and industrial maintenance to repair or reinforce stripped threads without replacing the parent component.

What are the specifications of the OSG STI Tap #6-40 UNF?

The OSG STI Tap has a #6-40 UNF thread size, H3 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is a spiral-point design for through-hole tapping in steel and stainless steel. The manufacturer part number is 30100308.

Where to buy OSG STI Taps worldwide?

You can source OSG STI Taps worldwide through 3G Electric, a global industrial equipment distributor since 1990. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the OSG 30100308 tap.

How to select the correct OSG STI Tap for thread repair?

Select an OSG STI Tap based on the thread size and pitch of the insert you plan to install. For steel or stainless steel, choose a spiral-point tap for through holes. Verify the tap tolerance (e.g., H3 / 2B-3B) matches the required thread class. Always use proper cutting fluid.

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-point 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
OSG Screw Thread Insert STI Tap: Spiral Point, #6-40 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer (MPN 30100301)
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, #6-40 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer (MPN 30100301)
OSG Screw Thread Insert STI Tap: Spiral Point, #8-36 UNF, H2 / 2B-3B, 3 Flute, Plug Chamfer (MPN 30100408)
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, #8-36 UNF, H2 / 2B-3B, 3 Flute, Plug Chamfer (MPN 30100408)
OSG Screw Thread Insert STI Tap: Spiral Point, #8-36 UNF, H2 / 2B-3B, 3 Flute, Plug Chamfer (MPN 30100401)
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, #8-36 UNF, H2 / 2B-3B, 3 Flute, Plug Chamfer (MPN 30100401)
OSG Screw Thread Insert STI Tap: Spiral Point, 7/16"-20 UNF, H4 / 2B-3B, 3 Flute, Plug Chamfer (MPN 30102108)
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, 7/16"-20 UNF, H4 / 2B-3B, 3 Flute, Plug Chamfer (MPN 30102108)
OSG Screw Thread Insert STI Tap: Spiral Point, #4-48 UNF, H2 / 2B-3B, 2 Flute, Plug Chamfer (MPN 30100208)
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, #4-48 UNF, H2 / 2B-3B, 2 Flute, Plug Chamfer (MPN 30100208)
OSG Screw Thread Insert STI Tap: Spiral Point, 7/16"-20 UNF, H4 / 2B-3B, 3 Flute, Plug Chamfer (MPN 30102101)
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, 7/16"-20 UNF, H4 / 2B-3B, 3 Flute, Plug Chamfer (MPN 30102101)

More from OSG

View all OSG parts
Spiral-point STI tap for cutting internal threads in steel and stainless steel prior to installing helical wire thread inserts. Features a 7/16"-14 UNC thread size, H4 / 2B-3B tolerance, 3 flutes, and plug chamfer. Suitable for thread repair and reinforcement applications
OSG
Spiral-point STI tap for cutting internal threads in steel and stainless steel prior to installing helical wire thread inserts. Features a 7/16"-14 UNC thread size, H4 / 2B-3B tolerance, 3 flutes, and plug chamfer. Suitable for thread repair and reinforcement applications
Spiral-point STI tap for cutting internal threads in steel and stainless steel to accept screw thread inserts. M2x0.4 metric thread, D2 / 2B-3B tolerance, 2-flute design, plug chamfer. Used in applications requiring strong, wear-resistant threads in metal components
OSG
Spiral-point STI tap for cutting internal threads in steel and stainless steel to accept screw thread inserts. M2x0.4 metric thread, D2 / 2B-3B tolerance, 2-flute design, plug chamfer. Used in applications requiring strong, wear-resistant threads in metal components
Spiral-point STI tap for cutting internal threads in steel and stainless steel to accept screw thread inserts. Features 3/8"-16 UNC thread size, H3 / 2B-3B tolerance, 3 flutes, and plug chamfer. Used in thread repair and reinforcement applications
OSG
Spiral-point STI tap for cutting internal threads in steel and stainless steel to accept screw thread inserts. Features 3/8"-16 UNC thread size, H3 / 2B-3B tolerance, 3 flutes, and plug chamfer. Used in thread repair and reinforcement applications
Spiral-point STI tap for cutting internal threads in steel and stainless steel to accept screw thread inserts. #10-24 UNC, H2 / 2B-3B tolerance, 3 flutes, plug chamfer. Used in applications requiring thread repair or reinforcement
OSG
Spiral-point STI tap for cutting internal threads in steel and stainless steel to accept screw thread inserts. #10-24 UNC, H2 / 2B-3B tolerance, 3 flutes, plug chamfer. Used in applications requiring thread repair or reinforcement
Spiral-point STI tap for cutting internal threads in steel and stainless steel for helical wire thread inserts. M6x1 metric thread, D3 / 4H-6H tolerance, 3 flutes, plug chamfer. Used to pre-tap holes for M6 screw thread inserts in applications such as thread repair and reinforcement
OSG
Spiral-point STI tap for cutting internal threads in steel and stainless steel for helical wire thread inserts. M6x1 metric thread, D3 / 4H-6H tolerance, 3 flutes, plug chamfer. Used to pre-tap holes for M6 screw thread inserts in applications such as thread repair and reinforcement
Spiral-point STI tap for cutting internal threads in steel and stainless steel for screw thread inserts. M4x0.7 metric thread, D3 / 4H-6H tolerance, 3 flutes, plug chamfer. Spiral-point design pushes chips forward for through-hole tapping
OSG
Spiral-point STI tap for cutting internal threads in steel and stainless steel for screw thread inserts. M4x0.7 metric thread, D3 / 4H-6H tolerance, 3 flutes, plug chamfer. Spiral-point design pushes chips forward for through-hole tapping
Spiral-point STI tap for cutting internal threads in steel and stainless steel prior to installing screw thread inserts. #8-32 UNC thread size, H3 / 2B-3B tolerance, plug chamfer, 3 flutes
OSG
Spiral-point STI tap for cutting internal threads in steel and stainless steel prior to installing screw thread inserts. #8-32 UNC thread size, H3 / 2B-3B tolerance, plug chamfer, 3 flutes
This spiral-point STI tap is designed for cutting internal threads in steel and stainless steel to accept screw thread inserts. It features a 5/8"-11 UNC thread size, H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer. Typical applications include automotive, aerospace, and general manufacturing where enhanced thread strength is required in softer base materials
OSG
This spiral-point STI tap is designed for cutting internal threads in steel and stainless steel to accept screw thread inserts. It features a 5/8"-11 UNC thread size, H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer. Typical applications include automotive, aerospace, and general manufacturing where enhanced thread strength is required in softer base materials