Home >> Produtos >> Parafusos >> Parafuso de Cabeça Cilíndrica com Sextavado Interno - Série Polegada
REFERÊNCIA:
ASME B18.3 - 2003
(Tabela 1A)
| Diâmetro Nominal |
D
|
A
|
H
|
R
|
J
|
T
|
G
|
LT
|
||||
|
máx.
|
min.
|
máx.
|
min
|
máx.
|
min.
|
máx.
|
min.
|
nom.
|
min.
|
min.
|
básico
|
|
|
1/4"
|
6,350
|
6,184
|
9,525
|
9,271
|
6,350
|
6,197
|
0,355
|
0,228
|
3/16"
|
3,048
|
2,413
|
25,400
|
|
5/16"
|
7,937
|
7,754
|
11,912
|
11,607
|
7,924
|
7,772
|
0,431
|
0,304
|
1/4"
|
3,835
|
3,022
|
28,448
|
|
3/8"
|
9,525
|
9,342
|
14,274
|
13,970
|
9,525
|
9,347
|
0,508
|
0,381
|
5/16"
|
4,622
|
3,632
|
31,750
|
|
7/16"
|
11,112
|
10,906
|
16,662
|
16,306
|
11,125
|
10,922
|
0,584
|
0,457
|
3/8"
|
5,410
|
4,216
|
35,052
|
|
1/2"
|
12,700
|
12,494
|
19,050
|
18,669
|
12,700
|
12,496
|
0,660
|
0,508
|
3/8"
|
6,223
|
4,826
|
38,100
|
|
5/8"
|
15,875
|
15,654
|
23,825
|
23,393
|
15,875
|
15,646
|
0,812
|
0,609
|
1/2"
|
7,797
|
6,045
|
44,450
|
|
3/4"
|
19,050
|
18,811
|
28,575
|
28,117
|
19,050
|
18,796
|
0,990
|
0,762
|
5/8"
|
9,398
|
7,239
|
50,800
|
|
7/8"
|
22,225
|
21,963
|
33,324
|
32,842
|
22,225
|
21,945
|
1,117
|
0,863
|
3/4"
|
10,972
|
8,458
|
57,150
|
|
1"
|
25,400
|
25,110
|
38,100
|
37,566
|
25,400
|
25,095
|
1,270
|
1,016
|
3/4"
|
12,573
|
9,652
|
63,500
|
|
1.1/8"
|
28,575
|
28,158
|
42,875
|
42,291
|
28,575
|
28,219
|
1,397
|
1,143
|
7/8"
|
14,147
|
10,871
|
71,374
|
|
1.1/4"
|
31,750
|
31,333
|
47,625
|
47,040
|
31,750
|
31,394
|
1,524
|
1,270
|
7/8"
|
15,748
|
12,065
|
79,248
|
|
1.3/8"
|
34,925
|
34,462
|
52,374
|
51,765
|
34,925
|
34,544
|
1,651
|
1,397
|
1"
|
17,322
|
13,284
|
86,360
|
|
1.1/2"
|
38,100
|
37,637
|
57,150
|
56,489
|
38,100
|
37,719
|
1,778
|
1,524
|
1"
|
18,923
|
14,478
|
95,250
|
|
1.3/4"
|
44,450
|
43,929
|
66,675
|
65,963
|
44,450
|
44,043
|
2,032
|
1,778
|
1.1/4"
|
22,098
|
16,891
|
111,252
|
|
2"
|
50,800
|
50,241
|
76,200
|
75,438
|
50,800
|
50,368
|
2,286
|
1,905
|
1.1/2"
|
25,273
|
19,304
|
127,00
|
TOLERÂNCIA PARA COMPRIMENTOS "L"
|
Diâmetro
Nominal
|
||||
|
Comprimento Nominal "L"
|
1/4"
a 3/8"
|
7/16"
a 3/4"
|
7/8"
a 1.1/2"
|
acima
de 1.1/2"
|
|
Até
1"
|
-0,762
|
-0,762
|
-1,270
|
---------
|
|
Acima
de 1"até 2.1/2"
|
-1,016
|
-1,524
|
-2,540
|
-4,572
|
|
Acima
de 2.1/2" até 6"
|
-1,524
|
-2,032
|
-3,556
|
-5,080
|
|
Acima
de 6"
|
-3,048
|
-3,048
|
-5,080
|
-6,096
|
OBS: ROSCAS: quando não especificado, usar - até O 1" - UNC-3A e para O 1.1/8" e maiores - UNC-2A
