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10N647 General Purpose Spiral-Point Taps

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UN coarse (UNC) taps have fewer threads per inch than UN fine (UNF) taps. Compared to UNF taps, UNC taps perform better in threading applications on brittle materials and are less likely to cross thread. Coarse threads can also withstand more physical abuse than fine threads. The bright finish on these taps provides a smooth, polished surface.

Product Number: 10N647

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  • Description
Mfr Model 10N647
Thread Size 1/4"-20
Tap Material High Speed Steel
Tap Finish Bright (Uncoated)
Thread Length 1 in
Overall Length 2-1/2 in
Thread Limit H3
Number of Flutes 2
Tap Length Standard JIS
Tap Shank Standard JIS
Primary Material Application All Materials
Thread Direction Left Hand
Coolant Fed Non-Coolant Through
Drill Bit Size 8#
Extended Neck Yes
Material Grade Machining M2
Measurement System Fractional Inch
Primary Material Application ISO Code N; P
Shank Dia 1/4 in
Shank Length 1-1/2 in
Square Size 0.1910 in
Standards ASME
Tap Chamfer Plug
Tap Thread Size 1/4"-20
Threads per Inch 20
Manufacturer Part Number 10N647
UNSPSC 23153305
Country of Origin China (subject to change)
Thread Standard UNC
Shank Type Machining Straight
Secondary Material Application Cast Iron
Secondary Material Application ISO Code K
Spiral Direction Neutral
Class of Fit 2B
Thread Pitch 0.75 mm
Min Bore Dia 0.3320 in

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