Alfa Tools General Product Catalog

Screw Thread Insert (STI) Taps

Premium High-Speed Steel

Features:

• Can be used by hand or under power • Produces threads to accommodate helical screw thread inserts • General purpose over size taps

Special Taps For Helical Coil Thread Inserts (Plug Style)

INCH SIZES

METRIC

STI

DRILL

STI

DRILL

STOCK #

STOCK #

SIZE

SIZE

SIZE

SIZE

MACHINE SCREW SIZES

5 2 6 3 8 3 8 3

ST66550 ST66551 ST66552A ST66552 ST66553 ST66554A ST66554 ST66555 ST66556 ST66557 ST66558 ST66559 ST66560 ST66561A ST66561 ST66562 ST66563 ST66564 ST66565 ST66566A ST66566 ST66567 ST66568A ST66568 ST66569 ST66570 ST66571A ST66571 ST66572

M5 x .8 M6 x 1.0 M8 x 1.0 M8 x 1.25 M9 x 1.25 M10 x 1.0 M10 x 1.25 M10 x 1.50 M11 x 1.25 M11 x 1.50 M12 x 1.25 M12 x 1.50 M12 x 1.75 M14 x 1.25 M14 x 1.50 M14 x 2.0 M16 x 1.50 M16 x 2.00 M18 x 1.50 M18 x 2.0 M18 x 2.50 M20 x 1.50 M20 x 2.0 M20 x 2.50 M22 x 1.50 M22 x 2.0 M22 x 2.5 M24 x 2.0 M24 x 3.0

Screw Thread Insert (STI) Taps

#31 #31 #28 #25 #25

ST66507 ST66508 ST66509 ST66511 ST66512 ST66513 ST66514 ST66515 ST66516 ST66517 ST66530 ST66531 ST66532 ST66533 ST66534 ST66535 ST66536 ST66537 ST66538 ST66539 ST66542 ST66542A ST66546 ST66547 ST66548 ST66548A ST66549 ST66549A ST66549B

4 - 40 4 - 48 5 - 40 6 - 32 6 - 40 8 - 32 8 - 36

9 25 10 3 10 3 10 4

11/64"

#17

11 00 11 00 12 2 12 25 12 50 14 30 14 30 14 50 16 25 16 50 18 25 18 50 18 50 20 25 20 50 20 50 22 50 22 50 22 50 24 25 24 75

13/64" 13/64"

10 - 24 10 - 32 12 - 24

#1

FRACTIONAL

17/64" 17/64" 21/64" 21/64" 25/64" 25/64" 29/64" 29/64" 17/32" 33/64" 21/32" 41/64" 25/32" 49/64" 29/32" 57/64" 1-1/32" 1-1/64" 1-1/64"

1/4" - 20 1/4" - 28 5/16" - 18 5/16" - 24 3/8" - 16 3/8" - 24 7/16" - 14 7/16" - 20 1/2" - 13 1/2" - 20 5/8" - 11 5/8" - 18 3/4" - 10 3/4" - 16 7/8" - 9 7/8" - 14

B

1" - 8 1" - 12 1" - 14

1 per pack

1 per pack

TAPER PIPE TAPS (NPT)

NEW!

STI

DRILL

DECIMAL

STOCK #

SIZE

SIZE

EQUIV.

FRACTIONAL

Q

0 3320 0 4375 0 5625 0 7031 0 9062 1 1406

STNPT66591 STNPT66592 STNPT66593 STNPT66594 STNPT66595 STNPT66596

1/8" - 27 1/4" - 18 3/8" - 18 1/2" - 14 3/4" - 14

7/16 9/16 45/64 29/32 1-9/64

1" - 11-1/2

1 per pack

B-41