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STIScrew Thread InsertTaps
P R O D U C T I O N S O L U T I O N S
Phone: 800.255.1701 • Fax: 800.338.4857www.morsecuttingtools.com
For Helical Coil Wire Screw Thread Inserts
STRAIGHT FLUTE HAND TAPS
SPIRAL POINT PLUG TAPS
SPIRAL FLUTE BOTTOMING TAPS
P R O D U C T I O NS O L U T I O N SSee Morse Catalog for Complete Selection of Cutting Tools
STI (Screw Thread Insert)Fast Spiral • Spiral FluteBottoming Taps
List No. 2074Ground Thread • High Speed SteelBottoming (1-2 thread chamfer)
STI (Screw Thread Insert) taps are oversize taps that produce a thread that will accept a helical coil wire screw thread insert of the same size and pitch.
Spiral Flute taps lift the chips out of the hole in blind hole tapping, eliminating chip disposal problems, damaged threads and broken taps. They will also bridge interruptions in the tapped hole. Fast Spiral taps provide enhanced chip lifting action, will bridge wider interruptions and have a freer-cutting geometry. Recommended for softer materials that produce stringy chips.
LIST NO. 2074MACHINE SCREW SIZES
SIZE
THREAD PER INCH PITCHDIA.LIMIT
NO. OFFLUTES
THREADLENGTH OAL
EDP NO.BOTTOMUNC UNF
2 56 — H1 2 7/16 1-3/4 3393056 — H2 2 7/16 1-3/4 33931
4 40 — H1 2 9/16 1-7/8 3393240 — H2 2 9/16 1-7/8 33933
5 40 — H1 3 5/8 1-15/16 3393440 — H2 3 5/8 1-15/16 33935
6
32 — H2 3 11/16 2 3393632 — H3 3 11/16 2 33937— 40 H1 3 11/16 2 33938— 40 H2 3 11/16 2 33939
8 32 — H2 3 3/4 2-1/8 3394032 — H3 3 3/4 2-1/8 33941
10
24 — H2 3 7/8 2-3/8 3394224 — H3 3 7/8 2-3/8 33943— 32 H2 3 7/8 2-3/8 33944— 32 H3 3 7/8 2-3/8 33945
12 24 — H2 3 15/16 2-3/8 3394624 — H3 3 15/16 2-3/8 33947
LIST NO. 2074FRACTIONAL SIZES
SIZE
THREAD PER INCH PITCHDIA.LIMIT
NO. OFFLUTES
THREADLENGTH OAL
EDP NO.BOTTOMUNC UNF
1/4
20 — H2 3 1 2-1/2 3394820 — H3 3 1 2-1/2 33949— 28 H2 3 1 2-1/2 33950— 28 H3 3 1 2-1/2 33951
5/16
18 — H3 3 1-1/8 2-23/32 3395218 — H4 3 1-1/8 2-23/32 33953— 24 H2 3 1-1/8 2-23/32 33954— 24 H3 3 1-1/8 2-23/32 33955
3/8
16 — H3 3 1-1/4 2-15/16 3395616 — H4 3 1-1/4 2-15/16 33957— 24 H2 3 1-1/4 2-15/16 33958— 24 H3 3 1-1/4 2-15/16 33959
7/16
14 — H3 3 1-7/16 3-5/32 3396014 — H4 3 1-7/16 3-5/32 33961— 20 H3 3 1-7/16 3-5/32 33962— 20 H4 3 1-7/16 3-5/32 33963
1/2
13 — H3 3 1-21/32 3-3/8 3396413 — H4 3 1-21/32 3-3/8 33965— 20 H3 3 1-21/32 3-3/8 33966— 20 H4 3 1-21/32 3-3/8 33967
P R O D U C T I O NS O L U T I O N S
Flyer #00039 Rev. #1 Rev. Date: 1-16-12
See Morse Catalog for Complete Selection of Cutting Tools
STI (Screw Thread Insert)Spiral Point Plug Taps
List No. 2073Ground Thread • High Speed SteelPlug (3-5 thread chamfer)
STI (Screw Thread Insert) taps are oversize taps that produce a thread that will accept a helical coil wire screw thread insert of the same size and pitch.
Spiral Point taps are designed for machine tapping in through holes in a wide variety of materials. The point ejects the chips ahead of the tap, eliminating chip disposal problems and thread damage. Shallower flutes also result in greater tap core strength allowing for higher cutting speeds.
LIST NO. 2073MACHINE SCREW SIZES
SIZE
THREAD PER INCH PITCHDIA.LIMIT
NO. OFFLUTES
THREADLENGTH OAL
EDP NO.PLUGUNC UNF
256 — H1 2 7/16 1-3/4 3385856 — H2 2 7/16 1-3/4 33859
440 — H1 2 9/16 1-7/8 3386040 — H2 2 9/16 1-7/8 33861
540 — H1 2 5/8 1-15/16 3386240 — H2 2 5/8 1-15/16 33863
6
32 — H2 2 11/16 2 3386432 — H3 2 11/16 2 33865— 40 H1 2 11/16 2 33866— 40 H2 2 11/16 2 33867
832 — H2 2 3/4 2-1/8 3386832 — H3 2 3/4 2-1/8 33869
10
24 — H2 2 7/8 2-3/8 3387024 — H3 2 7/8 2-3/8 33871— 32 H2 2 7/8 2-3/8 33872— 32 H3 2 7/8 2-3/8 33873
1224 — H2 2 15/16 2-3/8 3387424 — H3 2 15/16 2-3/8 33875
LIST NO. 2073FRACTIONAL SIZES
SIZE
THREAD PER INCH PITCHDIA.LIMIT
NO. OFFLUTES
THREADLENGTH OAL
EDP NO.PLUGUNC UNF
1/4
20 — H2 2 1 2-1/2 3387620 — H3 2 1 2-1/2 33877— 28 H2 2 1 2-1/2 33878— 28 H3 2 1 2-1/2 33879
5/16
18 — H3 3 1-1/8 2-23/32 3388018 — H4 3 1-1/8 2-23/32 33881— 24 H2 3 1-1/8 2-23/32 33882— 24 H3 3 1-1/8 2-23/32 33883
3/8
16 — H3 3 1-1/4 2-15/16 3388416 — H4 3 1-1/4 2-15/16 33885— 24 H2 3 1-1/4 2-15/16 33886— 24 H3 3 1-1/4 2-15/16 33887
7/16
14 — H3 3 1-7/16 3-5/32 3388814 — H4 3 1-7/16 3-5/32 33889— 20 H3 3 1-7/16 3-5/32 33890— 20 H4 3 1-7/16 3-5/32 33891
1/2
13 — H3 3 1-21/32 3-3/8 3389213 — H4 3 1-21/32 3-3/8 33893— 20 H3 3 1-21/32 3-3/8 33894— 20 H4 3 1-21/32 3-3/8 33895
P R O D U C T I O NS O L U T I O N S
See Morse Catalog for Complete Selection of Cutting Tools
STI (Screw Thread Insert)Straight Flute Hand Taps
List No. 2072Ground Thread • High Speed SteelAvailable in Plug (3-5 thread chamfer) or Bottoming (1-2 thread chamfer)
STI (Screw Thread Insert) taps are oversize taps that produce a thread that will accept a helical coil wire screw thread insert of the same size and pitch.
Straight Flute hand taps are used for hand tapping and machine tapping in through holes and blind holes in a wide variety of materials.
LIST NO. 2072MACHINE SCREW SIZES
SIZE
THREAD PER INCH PITCHDIA.LIMIT
NO. OFFLUTES
THREADLENGTH OAL
EDP NO.
UNC UNF PLUG BOTTOM
256 — H1 3 7/16 1-3/4 34149 3404956 — H2 3 7/16 1-3/4 34150 34050
440 — H1 3 9/16 1-7/8 34151 3405140 — H2 3 9/16 1-7/8 34152 34052
540 — H1 3 5/8 1-15/16 34153 3405340 — H2 3 5/8 1-15/16 34154 34054
6
32 — H2 3 11/16 2 34155 3405532 — H3 3 11/16 2 34156 34056— 40 H1 3 11/16 2 34157 34057— 40 H2 3 11/16 2 34158 34058
832 — H2 3 3/4 2-1/8 34159 3405932 — H3 3 3/4 2-1/8 34160 34060
10
24 — H2 3 7/8 2-3/8 34161 3406124 — H3 3 7/8 2-3/8 34162 34062— 32 H2 3 7/8 2-3/8 34163 34063— 32 H3 3 7/8 2-3/8 34164 34064
1224 — H2 3 15/16 2-3/8 34165 3406524 — H3 3 15/16 2-3/8 34166 34066
LIST NO. 2072FRACTIONAL SIZES
SIZE
THREAD PER INCH PITCHDIA.LIMIT
NO. OFFLUTES
THREADLENGTH OAL
EDP NO.
UNC UNF PLUG BOTTOM
1/4
20 — H2 3 1 2-1/2 34167 3406720 — H3 3 1 2-1/2 34168 34068— 28 H2 3 1 2-1/2 34169 34069— 28 H3 3 1 2-1/2 34170 34070
5/16
18 — H3 4 1-1/8 2-23/32 34171 3407118 — H4 4 1-1/8 2-23/32 34172 34072— 24 H2 4 1-1/8 2-23/32 34173 34073— 24 H3 4 1-1/8 2-23/32 34174 34074
3/8
16 — H3 4 1-1/4 2-15/16 34175 3407516 — H4 4 1-1/4 2-15/16 34176 34076— 24 H2 4 1-1/4 2-15/16 34177 34077— 24 H3 4 1-1/4 2-15/16 34178 34078
7/16
14 — H3 4 1-7/16 3-5/32 34179 3407914 — H4 4 1-7/16 3-5/32 34180 34080— 20 H3 4 1-7/16 3-5/32 34181 34081— 20 H4 4 1-7/16 3-5/32 34182 34082
1/2
13 — H3 4 1-21/32 3-3/8 34183 3408313 — H4 4 1-21/32 3-3/8 34184 34084— 20 H3 4 1-21/32 3-3/8 34185 34085— 20 H4 4 1-21/32 3-3/8 34186 34086
See Morse Catalog for Complete Selection of Cutting Tools
STI (Screw Thread Insert)Spiral Point Plug Taps
List No. 2073Ground Thread • High Speed SteelPlug (3-5 thread chamfer)
STI (Screw Thread Insert) taps are oversize taps that produce a thread that will accept a helical coil wire screw thread insert of the same size and pitch.
Spiral Point taps are designed for machine tapping in through holes in a wide variety of materials. The point ejects the chips ahead of the tap, eliminating chip disposal problems and thread damage. Shallower flutes also result in greater tap core strength allowing for higher cutting speeds.
LIST NO. 2073MACHINE SCREW SIZES
SIZE
THREAD PER INCH PITCHDIA.LIMIT
NO. OFFLUTES
THREADLENGTH OAL
EDP NO.PLUGUNC UNF
256 — H1 2 7/16 1-3/4 3385856 — H2 2 7/16 1-3/4 33859
440 — H1 2 9/16 1-7/8 3386040 — H2 2 9/16 1-7/8 33861
540 — H1 2 5/8 1-15/16 3386240 — H2 2 5/8 1-15/16 33863
6
32 — H2 2 11/16 2 3386432 — H3 2 11/16 2 33865— 40 H1 2 11/16 2 33866— 40 H2 2 11/16 2 33867
832 — H2 2 3/4 2-1/8 3386832 — H3 2 3/4 2-1/8 33869
10
24 — H2 2 7/8 2-3/8 3387024 — H3 2 7/8 2-3/8 33871— 32 H2 2 7/8 2-3/8 33872— 32 H3 2 7/8 2-3/8 33873
1224 — H2 2 15/16 2-3/8 3387424 — H3 2 15/16 2-3/8 33875
LIST NO. 2073FRACTIONAL SIZES
SIZE
THREAD PER INCH PITCHDIA.LIMIT
NO. OFFLUTES
THREADLENGTH OAL
EDP NO.PLUGUNC UNF
1/4
20 — H2 2 1 2-1/2 3387620 — H3 2 1 2-1/2 33877— 28 H2 2 1 2-1/2 33878— 28 H3 2 1 2-1/2 33879
5/16
18 — H3 3 1-1/8 2-23/32 3388018 — H4 3 1-1/8 2-23/32 33881— 24 H2 3 1-1/8 2-23/32 33882— 24 H3 3 1-1/8 2-23/32 33883
3/8
16 — H3 3 1-1/4 2-15/16 3388416 — H4 3 1-1/4 2-15/16 33885— 24 H2 3 1-1/4 2-15/16 33886— 24 H3 3 1-1/4 2-15/16 33887
7/16
14 — H3 3 1-7/16 3-5/32 3388814 — H4 3 1-7/16 3-5/32 33889— 20 H3 3 1-7/16 3-5/32 33890— 20 H4 3 1-7/16 3-5/32 33891
1/2
13 — H3 3 1-21/32 3-3/8 3389213 — H4 3 1-21/32 3-3/8 33893— 20 H3 3 1-21/32 3-3/8 33894— 20 H4 3 1-21/32 3-3/8 33895
P R O D U C T I O NS O L U T I O N S
See Morse Catalog for Complete Selection of Cutting Tools
STI (Screw Thread Insert)Straight Flute Hand Taps
List No. 2072Ground Thread • High Speed SteelAvailable in Plug (3-5 thread chamfer) or Bottoming (1-2 thread chamfer)
STI (Screw Thread Insert) taps are oversize taps that produce a thread that will accept a helical coil wire screw thread insert of the same size and pitch.
Straight Flute hand taps are used for hand tapping and machine tapping in through holes and blind holes in a wide variety of materials.
LIST NO. 2072MACHINE SCREW SIZES
SIZE
THREAD PER INCH PITCHDIA.LIMIT
NO. OFFLUTES
THREADLENGTH OAL
EDP NO.
UNC UNF PLUG BOTTOM
256 — H1 3 7/16 1-3/4 34149 3404956 — H2 3 7/16 1-3/4 34150 34050
440 — H1 3 9/16 1-7/8 34151 3405140 — H2 3 9/16 1-7/8 34152 34052
540 — H1 3 5/8 1-15/16 34153 3405340 — H2 3 5/8 1-15/16 34154 34054
6
32 — H2 3 11/16 2 34155 3405532 — H3 3 11/16 2 34156 34056— 40 H1 3 11/16 2 34157 34057— 40 H2 3 11/16 2 34158 34058
832 — H2 3 3/4 2-1/8 34159 3405932 — H3 3 3/4 2-1/8 34160 34060
10
24 — H2 3 7/8 2-3/8 34161 3406124 — H3 3 7/8 2-3/8 34162 34062— 32 H2 3 7/8 2-3/8 34163 34063— 32 H3 3 7/8 2-3/8 34164 34064
1224 — H2 3 15/16 2-3/8 34165 3406524 — H3 3 15/16 2-3/8 34166 34066
LIST NO. 2072FRACTIONAL SIZES
SIZE
THREAD PER INCH PITCHDIA.LIMIT
NO. OFFLUTES
THREADLENGTH OAL
EDP NO.
UNC UNF PLUG BOTTOM
1/4
20 — H2 3 1 2-1/2 34167 3406720 — H3 3 1 2-1/2 34168 34068— 28 H2 3 1 2-1/2 34169 34069— 28 H3 3 1 2-1/2 34170 34070
5/16
18 — H3 4 1-1/8 2-23/32 34171 3407118 — H4 4 1-1/8 2-23/32 34172 34072— 24 H2 4 1-1/8 2-23/32 34173 34073— 24 H3 4 1-1/8 2-23/32 34174 34074
3/8
16 — H3 4 1-1/4 2-15/16 34175 3407516 — H4 4 1-1/4 2-15/16 34176 34076— 24 H2 4 1-1/4 2-15/16 34177 34077— 24 H3 4 1-1/4 2-15/16 34178 34078
7/16
14 — H3 4 1-7/16 3-5/32 34179 3407914 — H4 4 1-7/16 3-5/32 34180 34080— 20 H3 4 1-7/16 3-5/32 34181 34081— 20 H4 4 1-7/16 3-5/32 34182 34082
1/2
13 — H3 4 1-21/32 3-3/8 34183 3408313 — H4 4 1-21/32 3-3/8 34184 34084— 20 H3 4 1-21/32 3-3/8 34185 34085— 20 H4 4 1-21/32 3-3/8 34186 34086
STIScrew Thread InsertTaps
P R O D U C T I O N S O L U T I O N S
Phone: 800.255.1701 • Fax: 800.338.4857www.morsecuttingtools.com
For Helical Coil Wire Screw Thread Inserts
STRAIGHT FLUTE HAND TAPS
SPIRAL POINT PLUG TAPS
SPIRAL FLUTE BOTTOMING TAPS
P R O D U C T I O NS O L U T I O N SSee Morse Catalog for Complete Selection of Cutting Tools
STI (Screw Thread Insert)Fast Spiral • Spiral FluteBottoming Taps
List No. 2074Ground Thread • High Speed SteelBottoming (1-2 thread chamfer)
STI (Screw Thread Insert) taps are oversize taps that produce a thread that will accept a helical coil wire screw thread insert of the same size and pitch.
Spiral Flute taps lift the chips out of the hole in blind hole tapping, eliminating chip disposal problems, damaged threads and broken taps. They will also bridge interruptions in the tapped hole. Fast Spiral taps provide enhanced chip lifting action, will bridge wider interruptions and have a freer-cutting geometry. Recommended for softer materials that produce stringy chips.
LIST NO. 2074MACHINE SCREW SIZES
SIZE
THREAD PER INCH PITCHDIA.LIMIT
NO. OFFLUTES
THREADLENGTH OAL
EDP NO.BOTTOMUNC UNF
2 56 — H1 2 7/16 1-3/4 3393056 — H2 2 7/16 1-3/4 33931
4 40 — H1 2 9/16 1-7/8 3393240 — H2 2 9/16 1-7/8 33933
5 40 — H1 3 5/8 1-15/16 3393440 — H2 3 5/8 1-15/16 33935
6
32 — H2 3 11/16 2 3393632 — H3 3 11/16 2 33937— 40 H1 3 11/16 2 33938— 40 H2 3 11/16 2 33939
8 32 — H2 3 3/4 2-1/8 3394032 — H3 3 3/4 2-1/8 33941
10
24 — H2 3 7/8 2-3/8 3394224 — H3 3 7/8 2-3/8 33943— 32 H2 3 7/8 2-3/8 33944— 32 H3 3 7/8 2-3/8 33945
12 24 — H2 3 15/16 2-3/8 3394624 — H3 3 15/16 2-3/8 33947
LIST NO. 2074FRACTIONAL SIZES
SIZE
THREAD PER INCH PITCHDIA.LIMIT
NO. OFFLUTES
THREADLENGTH OAL
EDP NO.BOTTOMUNC UNF
1/4
20 — H2 3 1 2-1/2 3394820 — H3 3 1 2-1/2 33949— 28 H2 3 1 2-1/2 33950— 28 H3 3 1 2-1/2 33951
5/16
18 — H3 3 1-1/8 2-23/32 3395218 — H4 3 1-1/8 2-23/32 33953— 24 H2 3 1-1/8 2-23/32 33954— 24 H3 3 1-1/8 2-23/32 33955
3/8
16 — H3 3 1-1/4 2-15/16 3395616 — H4 3 1-1/4 2-15/16 33957— 24 H2 3 1-1/4 2-15/16 33958— 24 H3 3 1-1/4 2-15/16 33959
7/16
14 — H3 3 1-7/16 3-5/32 3396014 — H4 3 1-7/16 3-5/32 33961— 20 H3 3 1-7/16 3-5/32 33962— 20 H4 3 1-7/16 3-5/32 33963
1/2
13 — H3 3 1-21/32 3-3/8 3396413 — H4 3 1-21/32 3-3/8 33965— 20 H3 3 1-21/32 3-3/8 33966— 20 H4 3 1-21/32 3-3/8 33967
P R O D U C T I O NS O L U T I O N S
Flyer #00039 Rev. #1 Rev. Date: 1-16-12