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Best Two Piece Threading Dies

Greenfield Threading 423055 Die System Complete Assembly, 1" - 8 #5, Carbon Steel, Uncoated (Bright) Coating, Right Cut, 2-Piece
Die construction: two-piece die set complete assembly. Die style: two-piece die system.
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HHIP 1011-3312 12 Piece 1/8-1" NPT Taper Pipe Tap and Hex Die Set
HHIP 12 Piece 1/8-1" NPT Taper Pipe Tap and Hex Die set includes one of each of 1/8-27, 1/4-18, 3/8-18, 1/2-14, 3/4-14 and 1-11-1/2 NPT tap and dies Thread ground high speed steel.
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HHIP 1011-0111 110 Piece #4-3/4" and M6-18 Carbon Steel Tap and Die Set
HHIP 110 Piece #4-3/4" and M6-18 Carbon steel tap and die set includes 1 taper tap, 1 bottoming tap and 1 die in each of these sizes 4-40, 6-32, 8-32, 10-24, 12-24, 10-32, 1/4-20, 1/4-24, 1/4-28, 1/4-40, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20, 9/16-12, 9/16-18, 5/8-11, 5/8-18, 3/4-10, 3/4-16, 1/8-27NPT, 1/4-18NPT, M6 x 1.0, M8 x 1.25, M10 x 1.0, M10 x 1.5, M11 x 1.5, M12 x 1.25, M12 x 1.75, M14 x 1.25 and M18 x 1.5 die. T-handle tap wrench.
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Best Hex Threading Dies

Irwin Industrial Tools 1920 Tap and Hex Rethreading Die Set, 12-Piece
Set includes: Hexagon Re-threading Dies and Pipe Thread Taps: 1/8 - 27 NPT, 1/4 - 18 NPT, 3/8 - 18 NPT, 1/2 - 14 NPT, 3/4 - 14 NPT, 1 - 11-1/2 NPT. Enter your model number to make sure this fits.
Reviews
"Seems like it's a nice set but haven't used it yet."
"This is a really well made product."
"This set is reasonably priced, and the quality is about as good as you would ever need for any normal use."
"Nice and sharp."
"Decent set - over priced, the Taps work great, but the Dies don't!"
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Best Round Threading Dies

1/2" - 28 Right Hand Thread Die 1/2 - 28 TPI
Brand new right hand thread die 1/2"- 28 TPI.
Reviews
"This die worked fine, cut sharp, muzzle brake went on perfectly and save yourself some heartache and get the (TAT) threading alignment tool too, the combination is a must for barrel threading...always have patience and do a good job, impatient people screw things up !"
"This cleaned up my 1/2 -28 threads perfectly."
"great product."
"HI QUALITY AND LONG LASTING!"
"I used this to chase some dirty treads on a .22 LR barrel."
"I bought this because of the many good reviews, but I received a 5 hole, 1/2-28 die and the threads would not fit onto a threading alignment tool."
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