OSG #4-40 UNC Spiral-Point STI Tap, H1 / 2B-3B, Plug Chamfer, 2 Flute
The OSG Screw Thread Insert STI Tap is a spiral-point tap designed for #4-40 UNC threads, featuring an H1 / 2B-3B tolerance and a plug chamfer. This 2-flute tap (MPN 1820400) is engineered for threading applications…
SKU 3G-OTH-287043
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.
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Product Description
The OSG Screw Thread Insert STI Tap is a spiral-point tap designed for #4-40 UNC threads, featuring an H1 / 2B-3B tolerance and a plug chamfer. This 2-flute tap (MPN 1820400) is engineered for threading applications requiring STI (screw thread insert) compatibility.
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 metal or plastic that accept 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 #4-40 UNC?
This OSG STI Tap has a #4-40 UNC thread size, H1 / 2B-3B tolerance, 2 flutes, and a plug chamfer. It is a spiral-point design for through-hole tapping. The manufacturer part number is 1820400. It is designed specifically for screw thread insert installation.
Where to buy OSG STI Taps worldwide?
You can source OSG STI Taps worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the OSG #4-40 UNC STI Tap (MPN 1820400).
How to select the correct OSG STI Tap for thread repair?
Select an OSG STI Tap that matches the thread size and pitch of the insert you plan to install. For a #4-40 UNC insert, use this STI Tap with H1 / 2B-3B tolerance. Ensure the tap has a plug chamfer for through-hole applications and 2 flutes for chip clearance. Always follow the insert manufacturer's recommendations.
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3G Electric supplies OSG spiral-point sti taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
