Page 678 - Yamawa_European_Catalogue_YEU21

10. Tap Thread Limits (JIS, DIN, ANSI)

Intro

Unified Threads (UNC/UNF) Unit: mm
Major Pitch Diameter Minor Major Pitch Diameter Minor
Kind diameter diameter Kind diameter diameter
SP Size of Class Upper Lower Size of Class Upper Lower
tap Basic Basic Tolerance Tolerance Tolerance Basic tap Basic Basic Tolerance Tolerance Tolerance Basic
Size Size (μm) Size Size Size (μm) Size
(μm) + (μm) + (μm) + (μm) +
P1 20 0 20 P1 20 0 20
P2 40 20 20 P2 40 20 20
SL P3 60 40 20 P3 60 40 20
cutting tap 2BX 4.826 4.310 25 11 14 3.967 1/4-20UNC cutting tap 2BX 6.350 5.524 30 14 16 4.976
3B
3B
40
18
24
2B
2B
22
46
22
38
22
24
47
71
60
PO GH2 25.4 12.7 12.7 GH2 25.4 12.7 12.7
GH3 38.1 25.4 12.7 GH3 38.1 25.4 12.7
No.10-32UNF
GH4 50.8 38.1 12.7 GH5 63.5 50.8 12.7
3BX 51 38 13 3BX 64 51 13
ST 2BX 64 51 13 2BX 76 64 12
forming tap G6 4.826 4.310 76 64 12 3.967 1/4-20UNC forming tap G7 6.350 5.524 50.8 38.1 12.7 4.976
64
64
12
G5
G6
51
76
13
89
13
76
H4
89
13
76
G7
H4 50.8 38.1 12.7 H6 76.2 63.5 12.7
ROLL
H6 76.2 63.5 12.7 P1 20 0 20
P1 20 0 20 P2 40 20 20
P2 40 20 20 P3 60 40 20
P3 60 40 20 3B 27 11 16
CARBIDE 3B 28 12 16 cutting tap 2B 6.350 5.761 43 19 24 5.367
cutting tap 2BX 5.486 4.798 43 20 23 4.341 GH2 25.4 12.7 12.7
2BX
2B
63
24
39
63
23
40
GH2 25.4 12.7 12.7 GH3 38.1 25.4 12.7
LONG No.12-24UNC GH3 38.1 25.4 12.7 1/4-28UNF GH4 50.8 38.1 12.7
GH4 50.8 38.1 12.7 GH5 63.5 50.8 12.7
GH5 63.5 50.8 12.7 3BX 51 38 13
3BX 51 38 13 2BX 76 64 12
HAND 2BX 76 64 12 G6 76 64 12
forming tap G6 5.486 4.798 50.8 38.1 12.7 4.341 G7 50.8 38.1 12.7
TAPS forming tap 6.350 5.761 5.367
89
12
76
76
64
13
H4
H4
H6 76.2 63.5 12.7 H6 76.2 63.5 12.7
EG (STI) P1 20 0 20 P2 40 20 20
P2 40 20 20 P3 60 40 20
P3 60 40 20 3B 32 14 18
3B 27 11 16 2B 49 23 26
SPECIAL 2B 42 19 23 cutting tap 2BX 7.938 7.021 74 48 26 6.411
THREADS, cutting tap 2BX 5.486 4.897 62 39 23 4.503 GH2 25.4 12.7 12.7
GAUGES
GH2 25.4 12.7 12.7 5/16-18UNC GH3 38.1 25.4 12.7
No.12-28UNF GH3 38.1 25.4 12.7 GH5 63.5 50.8 12.7
THREAD GH4 50.8 38.1 12.7 3BX 64 51 13
MILLS GH5 63.5 50.8 12.7 2BX 89 76 13
89
76
3BX 51 38 13 forming tap G7 7.938 7.021 63.5 50.8 12.7 6.411
13
forming tap G6 5.486 4.897 76 64 12 4.503 H7 88.9 76.2 12.7
2BX
76
64
12
H5
DIES H4 50.8 38.1 12.7
H6 76.2 63.5 12.7
CENTER
DRILLS
Technical
info
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