Greenfield Threading
Greenfield Threading 355802 Straight Flute Hand Tap #3-48 pneumatic accessory
Three-piece #3-48 UNC hand tap set in high-speed steel with TiN coating
- Three-piece kit covers bottoming, plug and taper tasks
- High-speed steel with TiN coating resists wear in UNC #3-48 threads
- 1 13/16 in overall length reaches deeper holes
- 1/2 in thread length suits shallow tapping needs
- Right-hand 3-flute design clears chips efficiently
Three-Piece Tap Kit
This three-piece tap kit provides bottoming, plug and taper taps for cutting #3-48 UNC threads. The high-speed steel cutters carry a TiN coating for wear resistance and a right-hand thread direction. Each tap has three flutes and an overall length of 1 13/16 in with a 1/2 in thread length. The set targets mechanics and fabricators who need to produce Class 2B internal threads in metal components.
Installation Notes
Start the hole with the taper tap, advance with the plug tap and finish with the bottoming tap to reach full depth. Use a 2.00 mm drill to produce the recommended 75 percent thread engagement before tapping. Apply cutting fluid and reverse the tap frequently to break chips, especially in deeper holes. Misalignment or skipping the drill size often leads to oversize threads or broken flutes.
Practical Limits
The H2 thread limit and Class 2B fit define the tolerance window for the finished internal thread. The 1/2 in thread length caps the maximum depth you can cut in a single pass. High-speed steel with TiN coating suits general-purpose steel and non-ferrous alloys but wears faster in hardened or abrasive materials. The #3-48 size restricts use to very small fasteners, so the kit does not serve larger threading tasks.
Highlights
- Three-piece kit covers bottoming, plug and taper tasks
- High-speed steel with TiN coating resists wear in UNC #3-48 threads
- 1 13/16 in overall length reaches deeper holes
- 1/2 in thread length suits shallow tapping needs
- Right-hand 3-flute design clears chips efficiently
Specifications
| Brand | CHICAGO-LATROBE |
|---|
Questions about this item
How can I confirm the #3-48 tap is cutting correctly after setup?
A properly cutting tap produces clean, consistent threads matching the UNC 2B class of fit with 75 percent thread engagement using the 2.00 mm drill size
What comes in the 355802 kit and what must I supply?
The kit includes three high-speed steel TiN-coated taps — taper, plug and bottoming — each with three flutes; you must provide the 2.00 mm drill bit and a tap wrench
Which of the three taps should I use for a through-hole in #3-48 UNC?
Use the plug tap for through-holes; the taper tap starts threads easily and the bottoming tap finishes blind holes to the bottom
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