We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
OSG 30104308 Spiral-Point STI Tap - Spiral-Point STI Taps for Steel & Stainless Steel
OSGSpiral-Point STI Taps for Steel & Stainless Steel

OSG 30104308 Spiral-Point STI Tap

The OSG Screw Thread Insert STI Tap is a spiral-point tap designed for threading steel and stainless steel. This 7/8"-14 UNF tap features an H4 / 2B-3B tolerance with a plug chamfer and 3 flutes (MPN 30104308).

SKU 3G-OTH-265430

Brand
OSG
Item
30104308 Spiral-Point STI Tap
Part Number
30104308
Category
Spiral-Point STI Taps for Steel & Stainless Steel
Available to Order
Also known as:30104308OSG
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

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

OSG
Manufacturer Part Number
30104308
Type
H4 / 2B-3B, Plug Chamfer
Flute
3
UNF
7/8"-14

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 designed for threading steel and stainless steel. This 7/8"-14 UNF tap features an H4 / 2B-3B tolerance with a plug chamfer and 3 flutes (MPN 30104308).

Frequently Asked Questions

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

An OSG Screw Thread Insert STI Tap cuts internal threads in steel and stainless steel to accept helical wire thread inserts. It is commonly used in automotive, aerospace, and industrial maintenance applications where thread repair or reinforcement is required.

What are the specifications of the OSG STI Tap 30104308?

The OSG STI Tap model 30104308 has a thread size of 7/8"-14 UNF, a tolerance class of H4 / 2B-3B, 3 flutes, and a spiral-point plug chamfer design. It is engineered for threading holes that will receive screw thread inserts in steel and stainless steel materials.

Where to buy OSG STI Tap 30104308 worldwide?

You can source the OSG STI Tap 30104308 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring the tap reaches your facility reliably.

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

To select the correct OSG STI tap, match the thread size and pitch (e.g., 7/8"-14 UNF) to the insert manufacturer's specifications. Use a tap with H4 / 2B-3B tolerance for standard thread classes. Always verify material compatibility—spiral-point taps suit through-hole threading in steel and stainless steel.

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. 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
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 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 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

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first