OSG Screw Thread Insert STI Tap: Spiral Fute, 3/8"-16 UNC, H3 / 2B-3B

An OSG Screw Thread Insert STI Tap is used to cut internal threads in aluminum and other materials for installing helical wire thread inserts. It is commonly applied in aerospace, automotive, and general manufacturing where strong, wear-resistant threads are required in softer base materials.

The OSG STI Tap 1303901000 is a spiral-flute tap for aluminum, sized 3/8"-16 UNC with a thread limit of H3 / 2B-3B. It has 2 flutes and is designed for through-hole threading. The manufacturer part number is 1303901000, and it is optimized for use with STI (screw thread insert) applications.

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; we supply genuine OSG tooling for manufacturing and maintenance operations.

To select the correct OSG STI Tap for aluminum, match the tap size and thread pitch to your insert requirements. For 3/8"-16 UNC inserts, use a tap with H3 / 2B-3B tolerance. Spiral-flute taps are ideal for through holes in aluminum as they evacuate chips upward. Always verify the tap's flute count and coating for material compatibility.