Parafuso de Cabeça Cilíndrica com Sextavado Interno - Série Polegada


   
REFERÊNCIA:
ANSI B18.3-1986
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

VERIFICAR A TABELA DE COMPOSIÇÃO QUÍMICA DOS PARAFUSOS

OBS: ROSCAS: quando não especificado, usar - até O 1" - UNC-3A e para O 1.1/8" e maiores - UNC-2A