INTRODUCCIÓN
Tabla 1-5 Serie de pulgadas con roscas gruesas (UNC) — Con recubrimiento de zinc
Designación de serie, roscas
por pulgadas y tamaño nominal
1/4-20 UNC
5/16-18 UNC
3/8-16 UNC
7/16-14 UNC
1/2-13 UNC
9/16-12 UNC
5/8-11 UNC
3/4-10 UNC
7/8-9 UNC
1-8 UNC
1 1/8-7 UNC
1 1/4-7 UNC
1 3/8-6 UNC
1 1/2-6 UNC
1-14
Par de apriete (pie/lb)
Grado
Máximo
5
6.6
8
9.3
5
13.5
8
19.1
5
24.0
8
33.9
5
38.4
8
54.3
5
58.6
8
82.8
5
84.5
8
119.4
5
116.6
8
164.8
5
206.8
8
292.3
5
333.8
8
471.6
5
500.3
8
707.0
5
624.0
8
1001.4
5
880.5
8
1413.1
5
1154.5
8
1852.8
5
1532.0
8
2458.8
Published 03-20-2019 Control # 613-06
MANUAL DE SERVICIO DE LA NBT30H-2
Nominal
Mínimo
6.4
6.2
9.0
8.8
13.2
12.8
18.6
18.1
23.4
22.8
33.1
32.2
37.4
36.5
52.9
51.5
57.1
55.7
80.7
78.6
82.4
80.3
116.5
113.5
113.7
110.8
160.7
156.6
201.7
196.5
284.9
277.6
325.4
317.1
459.8
448.0
487.8
475.3
689.3
671.6
608.4
592.8
976.4
951.4
858.5
836.5
1377.8
1342.5
1125.6
1096.7
1806.5
1760.2
1493.7
1455.4
2397.3
2335.8