We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

3G Electric
RFQ CartGet a QuoteSign inSign up
OSG Screw Thread Insert STI Tap: Spiral Point, 9/16"-12 UNC, H3 / 2B-3B, 4 Flute - Spiral-Point STI Taps for Multiple Materials
OSGSpiral-Point STI Taps for Multiple Materials

OSG Screw Thread Insert STI Tap: Spiral Point, 9/16"-12 UNC, H3 / 2B-3B, 4 Flute

SKU 3G-OTH-284731

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Point, 9/16"-12 UNC, H3 / 2B-3B, 4 Flute
Category
Spiral-Point STI Taps for Multiple Materials
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
31402401
Type
H3 / 2B-3B, Plug Chamfer
Flute
4
UNC
9/16"-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

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 multiple materials to accept helical wire thread inserts. It is commonly used in aerospace, automotive, and general manufacturing to repair or reinforce tapped holes in aluminum, steel, and cast iron.

What are the specifications of the OSG STI Tap 31402401?

The OSG STI Tap 31402401 is a spiral-point, 4-flute plug chamfer tap for 9/16"-12 UNC threads. It has an H3 / 2B-3B tolerance class and is designed for thread insert installation. The manufacturer part number is 31402401.

Where to buy OSG STI Tap 31402401 worldwide?

3G Electric supplies the OSG STI Tap 31402401 to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this spiral-point tap for thread insert applications.

How to select the correct STI tap size for a thread insert?

Select an STI tap that matches the thread insert's nominal size and pitch, such as 9/16"-12 UNC. The tap must have an STI designation and a tolerance like H3 / 2B-3B to ensure proper fit. Always verify the insert manufacturer's recommended tap drill size.

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 multiple materials. 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 Point, 9/16"-12 UNC, H3 / 2B-3B, 4 Flute, Plug Chamfer (MPN 31402408). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, 9/16"-12 UNC, H3 / 2B-3B, 4 Flute, Plug Chamfer (MPN 31402408). Key specifications — attr1299996: H3 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Point, 9/16"-12 UNC, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 31402508). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, 9/16"-12 UNC, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 31402508). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Point, 9/16"-12 UNC, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 31402501). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, 9/16"-12 UNC, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 31402501). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Point, 7/16"-14 UNC, H4 / 2B-3B, 3 Flute, Plug Chamfer (MPN 31401701). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, 7/16"-14 UNC, H4 / 2B-3B, 3 Flute, Plug Chamfer (MPN 31401701). Key specifications — attr1299996: H4 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Point, 7/16"-14 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer (MPN 31401601). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, 7/16"-14 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer (MPN 31401601). Key specifications — attr1299996: H3 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Point, 3/8"-16 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer (MPN 31401201). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, 3/8"-16 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer (MPN 31401201). Key specifications — attr1299996: H3 / 2B-3B.

More from OSG

View all OSG parts →
OSG Screw Thread Insert STI Tap: Spiral Point, M2.5x0.45 Metric, D2 / 4H-6H, 2 Flute, Plug Chamfer (MPN 34400201). Key specifications — attr1299996: D2 / 4H-6H.
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, M2.5x0.45 Metric, D2 / 4H-6H, 2 Flute, Plug Chamfer (MPN 34400201). Key specifications — attr1299996: D2 / 4H-6H.
OSG Screw Thread Insert STI Tap: Spiral Point, M8x1.25 Metric, D3 / 4H-6H, 3 Flute, Plug Chamfer (MPN 34400708). Key specifications — attr1299996: D3 / 4H-6H.
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, M8x1.25 Metric, D3 / 4H-6H, 3 Flute, Plug Chamfer (MPN 34400708). Key specifications — attr1299996: D3 / 4H-6H.
OSG Screw Thread Insert STI Tap: Spiral Point, 3/4"-10 UNC, H5 / 2B-3B, 4 Flute, Plug Chamfer (MPN 31403308)
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, 3/4"-10 UNC, H5 / 2B-3B, 4 Flute, Plug Chamfer (MPN 31403308)
OSG Screw Thread Insert STI Tap: Spiral Point, M6x1 Metric, D3 / 4H-6H, 3 Flute, Plug Chamfer (MPN 34400608). Key specifications — attr1299996: D3 / 4H-6H.
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, M6x1 Metric, D3 / 4H-6H, 3 Flute, Plug Chamfer (MPN 34400608). Key specifications — attr1299996: D3 / 4H-6H.
OSG Screw Thread Insert STI Tap: Spiral Point, 9/16"-18 UNF, H3 / 2B-3B, 4 Flute, Plug Chamfer (MPN 31402601). Key specifications — attr1299996: H3 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, 9/16"-18 UNF, H3 / 2B-3B, 4 Flute, Plug Chamfer (MPN 31402601). Key specifications — attr1299996: H3 / 2B-3B.
OSG Screw Thread Insert STI Tap: Spiral Point, M22x2.5 Metric, D5 / 4H-6H, 4 Flute, Plug Chamfer (MPN 34401408). Key specifications — attr1299996: D5 / 4H-6H.
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, M22x2.5 Metric, D5 / 4H-6H, 4 Flute, Plug Chamfer (MPN 34401408). Key specifications — attr1299996: D5 / 4H-6H.
OSG Screw Thread Insert STI Tap: Spiral Point, 1"-12 UNF, H4 / 2B, 4 Flute, Plug Chamfer (MPN 31404208)
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, 1"-12 UNF, H4 / 2B, 4 Flute, Plug Chamfer (MPN 31404208)
OSG Screw Thread Insert STI Tap: Spiral Point, 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 31403908). Key specifications — attr1299996: H4 / 2B-3B.
OSG
OSG Screw Thread Insert STI Tap: Spiral Point, 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Plug Chamfer (MPN 31403908). Key specifications — attr1299996: H4 / 2B-3B.