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

3G Electric
RFQ CartGet a QuoteSign inSign up
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H4 / 2B-3B, 4 Flute - Spiral-Flute STI Taps for Steel & Stainless Steel
OSGSpiral-Flute STI Taps for Steel & Stainless Steel

OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H4 / 2B-3B, 4 Flute

The OSG Screw Thread Insert STI Tap is a spiral-flute tap for steel and stainless steel, specified as 1"-12 UNF with H4 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer (MPN 30206701). 3G Electric interprets this…

SKU 3G-OTH-244373

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H4 / 2B-3B, 4 Flute
Category
Spiral-Flute STI Taps for Steel & Stainless Steel
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
30206701
Type
H4 / 2B-3B, Bottoming Chamfer
Flute
4
UNF
1"-12
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

Product Description

The OSG Screw Thread Insert STI Tap is a spiral-flute tap for steel and stainless steel, specified as 1"-12 UNF with H4 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer (MPN 30206701). 3G Electric interprets this demand and sources the genuine OSG product, supporting your threading operations across 14 industrial departments with specialist depth in cutting tools.

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 used in industrial maintenance and production to repair or reinforce tapped holes, ensuring strong, wear-resistant threads in demanding applications.

What are the specifications of the OSG STI Tap 1"-12 UNF?

This OSG STI Tap has a 1"-12 UNF thread, H4 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer. It is designed for spiral-flute tapping in steel and stainless steel. The manufacturer part number is 30206701.

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 pricing and lead time on this 1"-12 UNF spiral-flute tap (MPN 30206701).

How to select the correct STI tap for thread inserts?

Select an STI tap that matches the thread insert's size and class. For steel and stainless steel, use a spiral-flute design like this OSG tap. Verify the thread size (1"-12 UNF), tolerance (H4 / 2B-3B), and chamfer type (bottoming) for blind holes.

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 →

Similar products

Matched by specification & description
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30206708). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30206708). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 5/8"-18 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30204301). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 5/8"-18 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30204301). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 5/8"-18 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30204308). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 5/8"-18 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30204308). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30206301). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30206301). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H6 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30206901). Key specifications — attr1299996: H6 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-12 UNF, H6 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30206901). Key specifications — attr1299996: H6 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30206308). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 1"-8 UNC, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30206308). Key specifications — attr1299996: H4 / 2B-3B.

More from OSG

View all OSG parts →
OSG Screw Thread Insert STI Tap: Spiral Fute, #8-32 UNC, H3 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0145308). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, #8-32 UNC, H3 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0145308). Key specifications — attr1299996: H3 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 5/16"-24 UNF, H3 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0146701). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 5/16"-24 UNF, H3 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0146701). Key specifications — attr1299996: H3 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, M2.5x0.45 Metric, D2 / 4H-6H, 2 Flute (MPN 34300201). Key specifications — attr1299996: D2 / 4H-6H.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, M2.5x0.45 Metric, D2 / 4H-6H, 2 Flute (MPN 34300201). Key specifications — attr1299996: D2 / 4H-6H.
OSG Screw Thread Insert STI Tap: Spiral Fute, 1/4"-28 UNF, H3 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0146301). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 1/4"-28 UNF, H3 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0146301). Key specifications — attr1299996: H3 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 9/16"-18 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30203508). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 9/16"-18 UNF, H4 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 30203508). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, 1/2"-20 UNF, H3 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 0147808). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, 1/2"-20 UNF, H3 / 2B-3B, 4 Flute, Bottoming Chamfer (MPN 0147808). Key specifications — attr1299996: H3 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, #10-24 UNC, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0145501). Key specifications — attr1299996: H2 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, #10-24 UNC, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0145501). Key specifications — attr1299996: H2 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Fute, #10-32 UNF, H4 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0145901). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Fute, #10-32 UNF, H4 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0145901). Key specifications — attr1299996: H4 / 2B-3B.