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

3G Electric
OSG 30104401 Spiral-Point STI Tap, 1"-8 UNC, H4 / 2B, Plug Chamfer, 3 Flute - Spiral-Point STI Taps for Steel & Stainless Steel
OSGSpiral-Point STI Taps for Steel & Stainless Steel

OSG 30104401 Spiral-Point STI Tap, 1"-8 UNC, H4 / 2B, Plug Chamfer, 3 Flute

The OSG Screw Thread Insert STI Tap is a spiral-point tap for steel and stainless steel, specified as 1"-8 UNC, H4 / 2B tolerance, with a 3-flute, plug chamfer design (MPN 30104401). 3G Electric interprets this…

SKU 3G-OTH-265443

Brand
OSG
Item
30104401 Spiral-Point STI Tap, 1"-8 UNC, H4 / 2B, Plug Chamfer, 3 Flute
Part Number
30104401
Category
Spiral-Point STI Taps for Steel & Stainless Steel
Available to Order
Also known as:30104401OSG
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
30104401
Type
H4 / 2B, Plug Chamfer
Flute
3
UNC
1"-8

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 is a spiral-point tap for steel and stainless steel, specified as 1"-8 UNC, H4 / 2B tolerance, with a 3-flute, plug chamfer design (MPN 30104401). 3G Electric interprets this demand and sources the genuine OSG tool, supporting your threading operations across 14 industrial departments with specialist depth in cutting tools and controls.

Frequently Asked Questions

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

This OSG spiral-point STI tap is designed for cutting internal threads in steel and stainless steel before installing screw thread inserts. It is commonly used in automotive, aerospace, and general manufacturing applications where strong, wear-resistant threads are required.

What are the specifications of the OSG Screw Thread Insert STI Tap?

The OSG STI tap has a UNC thread size of 1"-8, with an H4 / 2B tolerance class and a plug chamfer. It features 3 flutes and a spiral-point design for efficient chip evacuation. The manufacturer part number is 30104401.

Where to buy the OSG Screw Thread Insert STI Tap worldwide?

You can source the OSG Screw Thread Insert STI Tap through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring you receive the correct OSG tap for your threading needs.

How to select the correct OSG STI tap for steel?

Select an OSG STI tap based on thread size, material, and tolerance. For steel and stainless steel, a spiral-point design with a plug chamfer is recommended. Ensure the tap matches the insert's thread class (e.g., H4 / 2B) and use proper cutting fluid to extend tool life.

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
Not sure this is the right part? Photo-identify it

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

More from OSG

View all OSG parts
Spiral-point STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. UNF 5/16"-24, H2 / 2B-3B tolerance, 3 flutes, plug chamfer. Suitable for applications requiring thread reinforcement in softer base materials
OSG
Spiral-point STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. UNF 5/16"-24, H2 / 2B-3B tolerance, 3 flutes, plug chamfer. Suitable for applications requiring thread reinforcement in softer base materials
Spiral-point STI tap for cutting internal threads in steel and stainless steel to accept screw thread inserts. M10x1.5 metric, D4 / 4H-6H tolerance, 3 flutes, plug chamfer. Suitable for through-hole applications where chip evacuation is required
OSG
Spiral-point STI tap for cutting internal threads in steel and stainless steel to accept screw thread inserts. M10x1.5 metric, D4 / 4H-6H tolerance, 3 flutes, plug chamfer. Suitable for through-hole applications where chip evacuation is required
Spiral-point STI tap for cutting internal threads in steel and stainless steel prior to installing screw thread inserts. M16x2 metric thread, D5 / 4H-6H tolerance, 3 flutes, plug chamfer. Spiral-point design pushes chips forward, suitable for through-hole applications
OSG
Spiral-point STI tap for cutting internal threads in steel and stainless steel prior to installing screw thread inserts. M16x2 metric thread, D5 / 4H-6H tolerance, 3 flutes, plug chamfer. Spiral-point design pushes chips forward, suitable for through-hole applications
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
Spiral-point STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. UNC 9/16"-12 thread size, H4 / 2B-3B tolerance, plug chamfer, 3 flutes. Used in applications requiring thread repair or reinforcement in ferrous materials
OSG
Spiral-point STI tap for cutting internal threads in steel and stainless steel to accept helical wire thread inserts. UNC 9/16"-12 thread size, H4 / 2B-3B tolerance, plug chamfer, 3 flutes. Used in applications requiring thread repair or reinforcement in ferrous materials
Spiral-point STI tap designed for cutting internal threads in steel and stainless steel to accept screw thread inserts. Features a 5/16"-18 UNC thread size, H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer. Commonly used in applications requiring thread repair or reinforcement, such as in automotive, aerospace, and industrial maintenance
OSG
Spiral-point STI tap designed for cutting internal threads in steel and stainless steel to accept screw thread inserts. Features a 5/16"-18 UNC thread size, H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer. Commonly used in applications requiring thread repair or reinforcement, such as in automotive, aerospace, and industrial maintenance

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first