SKC THREAD TOOL MFG. CO.,LTD.

ART NO.804BT
BSPT (BRITISH STANDARD PIPE THREAD)

ART NO.805BS
BSPS (BRITISH STANDARD PARALLEL THREAD)

(Ground Thread/Cut Thread)
BSPT
BSPS
Nominal
 Thread Basic Regular Weight
Diameter Per
 Pitch A(mm) B(mm) B1(mm) C(mm) Per Pc
(g)
INCH INCH Diameter
1/16
1/8
1/4
3/8
1/2		 28
28
19
19
14		 7.753
9.728
13.157
16.662
20.955		 55
55
62
65
80		 17.5
19
28
28
35		 12
13
21
21
25		 8
8
11
14
18		 15
20
40
80
140
5/8
3/4
7/8
1
1 1/8		 14
14
14
11
11		 22.912
26.441
30.202
33.249
37.898		 85
85
90
95
105

35
35
40
45
45

 25
25
28
32
32		 20
23
24
26
30		 160
240
340
420
580
1 1/4
1 3/8
1 1/2
1 5/8
1 3/4		 11
11
11
11
11		 41.910
44.325
47.803
51.990
53.748		 105
110
110
115
115		 45
45
45
45
45		 32
32
32
32
32		 32
35
38
40
40		 660
770
890
1000
1200
2
2 1/4
2 1/2
2 3/4
3		 11
11
11
11
11		 59.614
65.712
75.184
81.537
87.884		 120
130
145
150
155		 50
55
65
65
65		 35
40
50
52
52		 46
50
55
60
65		 1350
2100
2800
3500
4200
3 1/4
3 1/2
3 3/4
4

 11
11
11
11		 93.984
100.330
106.684
113.030		 165
165
170
170		 68
68
70
70		 52
52
55
55		 68
70
72
75		 5100
6000
7700
8600

NPT NPTF

ART NO.804NT
NPT (AMERICAN NATIONAL TAPER PIPE THREAD)

ART NO.804PF
NPTF (DRYSEAL AMERICAN NATIONAL TAPER PIPE THREAD)

ART NO.805NS
NPS (AMERICAN NATIONAL STRAIGHT PIPE THREAD)

ART NO.804SF
NPSF (DRYSEAL AMERICAN NATIONAL STRAIGHT PIPE THREAD)

(Ground Thread/Cut Thread)
NPS NPSF
Nominal
 Thread Basic Regular Weight
Diameter Per
 Pitch A(mm) B(mm) B1(mm) C(mm) Per Pc
(g)
INCH INCH Diameter(mm)
1/16
1/8
1/4
3/8
1/2		 27
27
18
18
14		 7.142
9.489
12.487
15.926
19.772		 55
55
62
65
80		 17.5
19
28
28
35		 11.99
12.03
17.44
17.63
22.83		 8
8
11
14
18		 15
20
40
80
140
3/4
1
1 1/4
1 1/2
2		 14
11 1/2
11 1/2
11 1/2
11 1/2

25.117
31.461
40.218
46.287
58.325

 85
95
105
110
120		 35
45
45
45
50		 22.96
27.38
28.09
28.42
28.02		 23
26
32
38
46		 240
400
650
890
1350
2 1/2
3
3 1/2
4

 8
8
8
8		 70.159
86.068
98.776
111.433 		145
155
165
170		 65
65
68
70		 40.82
42.95
44.68
45.57		 55
65
70
75		 2800
4200
6000
8600
ASA Standard Number
of
Flutes
A(mm) B(mm) B1(mm) C(mm)
54.0
54.0
61.9
65.1
79.4		 17.5
19.1
27.0
27.0
34.9		 11.99
12.03
17.44
17.63
22.83		 7.938
11.113
14.288
17.780
17.463		 4
4
4
4
4
82.6
95.3
101.6
108.0
114.3		 34.9
44.5
44.5
44.5
44.5		 22.96
27.38
28.09
28.42
28.02		 23.020
28.575
33.338
38.100
47.625		 5
5
5
7
7
139.7
152.4
165.1
171.4

 65.1
66.7
68.3
69.8		 40.82
42.95
44.68
45.57		 57.150
66.675
71.438
76.200		 8
8
9
9

COPYRIGHT(C) 2001, SKC THREAD TOOL MFG. CO.,LTD.ALL RIGHTS RESERVED.