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449T28 General Purpose Spiral-Flute Taps

$7.95

Bulk orders will be discounted, please contact us.

Oversized taps have a slightly larger pitch diameter than standard taps. They are used to make threads in a hole before a coating or treatment is applied to the hole. Once the coating or treatment is applied, the threads will be reduced to the standard pitch diameter. The black-oxide finish on these taps retains lubricants to improve the taps' wear resistance and chip flow. Black-oxide taps should only be used on ferrous metals.

Product Number: 449T28

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  • Description
Mfr Model 313581
Thread Size 1/4"-28
Tap Material High Speed Steel
Tap Finish Black Oxide
Thread Length 1 in
Overall Length 2-1/2 in
Thread Limit H11
Number of Flutes 3
Tap Length Standard JIS
Tap Shank Standard USCTI Table 302
Primary Material Application Aluminum; Brass; Bronze; Copper; Steel
Thread Direction Right Hand
Coolant Fed Non-Coolant Through
Drill Bit Size #3
Extended Neck Yes
Helix Angle 52 °
Material Grade Machining 107
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 USCTI TABLE 302
Tap Chamfer Semi-Bottoming
Tap Style Spiral Flute
Tap Thread Size 1/4"-28
Threads per Inch 28
UNSPSC 23153305
Country of Origin USA (subject to change)
Thread Standard UNF
Features Efficient Chip Evacuation; For Blind Hole Applications; Increased Wear Resistance; Spiral Flute Taps for Ferrous and Non-Ferrous Materials
Shank Type Machining Straight
Secondary Material Application Aluminum; Cast Iron; Steel
Secondary Material Application ISO Code K; N; P
Spiral Direction Right Hand
Class of Fit 1B
Thread Pitch 0.70mm

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