| Dimensions in inches (1 inch=25.4 mm) source ASME B18.2.1 - table 7 Heavy Hex Screws | | Publication date: 2010 | | d Thread size | UNC (nr of threads x inch) | UNF (nr of threads x inch) | UN (nr of threads x inch) | H basic | E min | LT (l< 6') | LT (l>6') | G min | F basic | | 3/8 | 16 | 24 | - | 0.234 | 0.360 | 1 | 1.25 | 0.763 | 0.688 | | 1/2 | 13 | 20 | - | 0.313 | 0.482 | 1.25 | 1.5 | 0.96 | 0.875 | | 5/8 | | | | | | | | | | | 3/4 | | | | | | | | | | | 7/8 | | | | | | | | | | | 1 | | | | | | | | | | | 1-1/8 | | | | | | | | | | | 1-1/4 | | | | | | | | | | | 1-3/8 | | | | | | | | | | | 1-1/2 | | | | | | | | | | | 1-5/8 | | | | | | | | | | | 1-3/4 | | | | | | | | | | | 1-7/8 | | | | | | | | | | | 2 | | | | | | | | | | | 2-1/4 | | | | | | | | | | | 2-1/2 | | | | | | | | | | | 2-3/4 | | | | | | | | | | | 3 | | | | | | | | | | | 3-1/4 | | | | | | | | | | | 3-1/2 | | | | | | | | | | | 3-3/4 | | | | | | | | | | | 4 | | | | | | | | | | | 4-1/4 | | | | | | | | | | | 4-1/2 | | | | | | | | | | | 4-3/4 | | | | | | | | | | | 5 | | | | | | | | | | | 5-1/4 | | | | | | | | | | | 5-1/2 | | | | | | | | | | | 5-3/4 | | | | | | | | | | | 6 | | | | | | | | | |
Standard ASME B18.2.1 TABLE 2
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| Dimensions in inches (1 inch=25.4 mm) source ASME B18.2.1 - Table 2 Hex Bolts | | Publication date: 2010 | | d Thread size | UNC (nr of threads x inch) | UNF (nr of threads x inch) | UN (nr of threads x inch) | H basic | E min | LT (l< 6') | LT (l> 6') | G min | F basic | | 1/4 | 20 | 28 | - | 0.172 | 0.237 | 0.75 | 1 | 0.484 | 0.438 | | 5/16 | 18 | 24 | - | 0.219 | 0.298 | 0.875 | 1.125 | 0.552 | 0.5 | | 3/8 | | | | | | | | | | | 7/16 | | | | | | | | | | | 1/2 | | | | | | | | | | | 5/8 | | | | | | | | | | | 3/4 | | | | | | | | | | | 7/8 | | | | | | | | | | | 1 | | | | | | | | | | | 1-1/8 | | | | | | | | | | | 1-1/4 | | | | | | | | | | | 1-3/8 | | | | | | | | | | | 1-1/2 | | | | | | | | | | | 1-5/8 | | | | | | | | | | | 1-3/4 | | | | | | | | | | | 1-7/8 | | | | | | | | | | | 2 | | | | | | | | | | | 2-1/4 | | | | | | | | | | | 2-1/2 | | | | | | | | | | | 2-3/4 | | | | | | | | | | | 3 | | | | | | | | | | | 3-1/4 | | | | | | | | | | | 3-1/2 | | | | | | | | | | | 3-3/4 | | | | | | | | | | | 4 | | | | | | | | | |
Standard ASME B18.2.1 TABLE 6
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| Dimensions in inches (1 inch=25.4 mm) source ASME B18.2.1 table 6 Hex Cap Screws | | Publication date: 2010 | | d Thread size | UNC (nr of threads x inch) | UNF (nr of threads x inch) | UN (nr of threads x inch) | E min | E max | F basic | G min | G max | H basic | LT (l< 6') | LT (l> 6') | | 1/4 | 20 | 28 | - | 0.245 | 0.250 | 0.438 | 0.488 | 0.505 | 0.156 | 0.75 | 1 | | 5/16 | 18 | 24 | - | 0.306 | 0.315 | 0.5 | 0.557 | 0.577 | 0.203 | 0.875 | 1.125 | | 3/8 | | | | | | | | | | | | | 7/16 | | | | | | | | | | | | | 1/2 | | | | | | | | | | | | | 9/16 | | | | | | | | | | | | | 5/8 | | | | | | | | | | | | | 3/4 | | | | | | | | | | | | | 7/8 | | | | | | | | | | | | | 1 | | | | | | | | | | | | | 1-1/8 | | | | | | | | | | | | | 1-1/4 | | | | | | | | | | | | | 1-3/8 | | | | | | | | | | | | | 1-1/2 | | | | | | | | | | | | | 1-5/8 | | | | | | | | | | | | | 1-3/4 | | | | | | | | | | | | | 1-7/8 | | | | | | | | | | | | | 2 | | | | | | | | | | | | | 2-1/4 | | | | | | | | | | | | | 2-1/2 | | | | | | | | | | | | | 2-3/4 | | | | | | | | | | | | | 3 | | | | | | | | | | | |
|
Dimensions in inches (1 inch=25.4 mm) source ASME B18.2.1 - table 2 Hex Bolts
|
|
Publication date: 2010
|
|
d Thread size
|
UNC (nr of threads x inch)
|
UNF (nr of threads x inch)
|
UN (nr of threads x inch)
|
H basic
|
E min
|
LT (l< 6')
|
LT (l> 6')
|
G min
|
F basic
|
|
1/4
|
20
|
28
|
-
|
0.172
|
0.237
|
0.75
|
1
|
0.484
|
0.438
|
|
5/16
|
18
|
24
|
-
|
0.219
|
0.298
|
0.875
|
1.125
|
0.552
|
0.5
|
|
3/8
|
16
|
24
|
-
|
0.25
|
0.360
|
1
|
1.25
|
0.620
|
0.563
|
|
7/16
|
14
|
20
|
-
|
0.297
|
0.421
|
1.125
|
1.375
|
0.687
|
0.62
|
|
1/2
|
13
|
20
|
-
|
0.344
|
0.482
|
1.25
|
1.5
|
0.826
|
3/4
|
|
5/8
|
11
|
18
|
-
|
0.422
|
0.605
|
1.5
|
1.75
|
1.033
|
15/16
|
|
3/4
|
10
|
16
|
-
|
0.5
|
0.729
|
1.75
|
2
|
1.240
|
1.125
|
|
7/8
|
9
|
14
|
-
|
0.578
|
0.852
|
2
|
2.25
|
1.447
|
1.313
|
|
1
|
8
|
12
|
-
|
0.672
|
0.976
|
2.25
|
2.5
|
1.653
|
1.50
|
|
1-1/8
|
7
|
12
|
8
|
0.75
|
1.098
|
2.5
|
2.75
|
1.859
|
1.625
|
|
1-1/4
|
7
|
12
|
8
|
0.844
|
1.223
|
2.75
|
3
|
2.066
|
1.875
|
|
1-3/8
|
6
|
12
|
8
|
0.906
|
1.345
|
3
|
3.25
|
2.273
|
2
|
|
1-1/2
|
6
|
12
|
8
|
1
|
1.470
|
3.25
|
3.5
|
2.480
|
2.25
|
|
1-5/8
|
-
|
-
|
6-8
|
1.094
|
1.591
|
3.5
|
3.75
|
2.616
|
2.438
|
|
1-3/4
|
5
|
-
|
6-8
|
1.156
|
1.716
|
3.75
|
4
|
2.893
|
2.625
|
|
1-7/8
|
-
|
-
|
6-8
|
1.25
|
1.839
|
4
|
4.25
|
3.099
|
2.813
|
|
2
|
4.5
|
-
|
6-8
|
1.344
|
1.964
|
4.25
|
4.5
|
3.306
|
3
|
|
2-1/4
|
4.5
|
-
|
6-8
|
1.5
|
2.214
|
4.75
|
5
|
3.719
|
3.375
|
|
2-1/2
|
4
|
-
|
6-8
|
1.656
|
2.461
|
5.25
|
5.5
|
4.133
|
3.75
|
|
2-3/4
|
4
|
-
|
6-8
|
1.813
|
2.711
|
5.75
|
6
|
4.546
|
4.125
|
|
3
|
4
|
-
|
6-8
|
2
|
2.961
|
6.25
|
6.5
|
4.959
|
4.5
|
|
3-1/4
|
4
|
-
|
6-8
|
2.188
|
3.210
|
6.75
|
7
|
5.372
|
4.875
|
|
3-1/2
|
4
|
-
|
6-8
|
2.313
|
3.461
|
7.25
|
7.5
|
5.786
|
5.25
|
|
3-3/4
|
4
|
-
|
6-8
|
2.5
|
3.726
|
7.75
|
8
|
6.198
|
5.625
|
|
4
|
4
|
-
|
6-8
|
2.688
|
3.975
|
8.25
|
8.5
|
6.612
|
6
|
|
|
Dimensions in inches (1 inch=25.4 mm) source ASME B18.2.1 - table 3 Heavy Hex Bolts
|
|
Publication date: 2010
|
|
d Thread size
|
UNC (nr of threads x inch)
|
UNF (nr of threads x inch)
|
UN (nr of threads x inch)
|
H basic
|
E min
|
LT (l< 6')
|
LT (l> 6')
|
G min
|
F basic
|
|
3/8
|
16
|
24
|
-
|
0.25
|
0.360
|
1
|
1.25
|
0.763
|
0.563
|
|
1/2
|
13
|
20
|
-
|
0.344
|
0.482
|
1.25
|
1.5
|
0.969
|
3/4
|
|
5/8
|
11
|
18
|
-
|
0.422
|
0.605
|
1.5
|
1.75
|
1.175
|
15/16
|
|
3/4
|
10
|
16
|
-
|
0.5
|
0.729
|
1.75
|
2
|
1.383
|
1.125
|
|
7/8
|
9
|
14
|
-
|
0.578
|
0.852
|
2
|
2.25
|
1.589
|
1.313
|
|
1
|
8
|
12
|
-
|
0.672
|
0.976
|
2.25
|
2.5
|
1.796
|
1.50
|
|
1-1/8
|
7
|
12
|
8
|
0.75
|
1.098
|
2.5
|
2.75
|
2.002
|
1.625
|
|
1-1/4
|
7
|
12
|
8
|
0.844
|
1.223
|
2.75
|
3
|
2.209
|
1.875
|
|
1-3/8
|
6
|
12
|
8
|
0.906
|
1.345
|
3
|
3.25
|
2.416
|
2
|
|
1-1/2
|
6
|
12
|
8
|
1
|
1.470
|
3.25
|
3.5
|
2.622
|
2.25
|
|
1-5/8
|
-
|
-
|
6-8
|
1.094
|
1.591
|
3.5
|
3.75
|
2.829
|
2.438
|
|
1-3/4
|
5
|
-
|
6-8
|
1.156
|
1.716
|
3.75
|
4
|
3.035
|
2.625
|
|
1-7/8
|
-
|
-
|
6-8
|
1.25
|
1.839
|
4
|
4.25
|
3.242
|
2.813
|
|
2
|
4.5
|
-
|
6-8
|
1.344
|
1.964
|
4.25
|
4.5
|
3.449
|
3
|
|
2-1/4
|
4.5
|
-
|
6-8
|
1.5
|
2.214
|
4.75
|
5
|
3.862
|
3.375
|
|
2-1/2
|
4
|
-
|
6-8
|
1.656
|
2.461
|
5.25
|
5.5
|
4.275
|
3.75
|
|
2-3/4
|
4
|
-
|
6-8
|
1.813
|
2.711
|
5.75
|
6
|
4.668
|
4.125
|
|
3
|
4
|
-
|
6-8
|
2
|
2.961
|
6.25
|
6.5
|
5.102
|
4.5
|
|
|
Dimensions in inches (1 inch=25.4 mm) source ASME B18.2.1 table 6 Hex Cap Screws
|
|
Publication date: 2010
|
|
d Thread size
|
UNC (nr of threads x inch)
|
UNF (nr of threads x inch)
|
UN (nr of threads x inch)
|
H basic
|
E min
|
LT (l< 6')
|
LT (l> 6')
|
G min
|
F basic
|
|
1/4
|
20
|
28
|
-
|
0.156
|
0.245
|
0.75
|
1
|
0.488
|
0.438
|
|
5/16
|
18
|
24
|
-
|
0.203
|
0.306
|
0.875
|
1.125
|
0.557
|
0.5
|
|
3/8
|
16
|
24
|
-
|
0.234
|
0.369
|
1
|
1.25
|
0.628
|
0.562
|
|
7/16
|
14
|
20
|
-
|
0.281
|
0.430
|
1.125
|
1.375
|
0.698
|
0.625
|
|
1/2
|
13
|
20
|
-
|
0.313
|
0.493
|
1.25
|
1.5
|
0.840
|
0.75
|
|
9/16
|
12
|
18
|
-
|
0.359
|
0.554
|
1.375
|
1.625
|
0.910
|
0.812
|
|
5/8
|
11
|
18
|
-
|
0.391
|
0.617
|
1.5
|
1.75
|
1.051
|
0.937
|
|
3/4
|
10
|
16
|
-
|
0.469
|
0.741
|
1.75
|
2
|
1.254
|
1.125
|
|
7/8
|
9
|
14
|
-
|
0.547
|
0.866
|
2
|
2.25
|
1.465
|
1.313
|
|
1
|
8
|
12
|
-
|
0.609
|
0.990
|
2.25
|
2.5
|
1.675
|
1.50
|
|
1-1/8
|
7
|
12
|
8
|
0.688
|
1.114
|
2.5
|
2.75
|
1.859
|
1.625
|
|
1-1/4
|
7
|
12
|
8
|
0.781
|
1.239
|
2.75
|
3
|
2.066
|
1.875
|
|
1-3/8
|
6
|
12
|
8
|
0.844
|
1.363
|
3
|
3.25
|
2.273
|
2
|
|
1-1/2
|
6
|
12
|
8
|
0.938
|
1.488
|
3.25
|
3.5
|
2.480
|
2.25
|
|
1-5/8
|
-
|
-
|
6-8
|
1
|
1.613
|
3.5
|
3.75
|
2.686
|
2.438
|
|
1-3/4
|
5
|
-
|
6-8
|
1.094
|
1.738
|
3.75
|
4
|
2.893
|
2.625
|
|
1-7/8
|
-
|
-
|
6-8
|
1.156
|
1.863
|
4
|
4.25
|
3.099
|
2.813
|
|
2
|
4.5
|
-
|
6-8
|
1.219
|
1.988
|
4.25
|
4.5
|
3.306
|
3
|
|
2-1/4
|
4.5
|
-
|
6-8
|
1.375
|
2.238
|
4.75
|
5
|
3.719
|
3.375
|
|
2-1/2
|
4
|
-
|
6-8
|
1.531
|
2.488
|
5.25
|
5.5
|
4.133
|
3.75
|
|
2-3/4
|
4
|
-
|
6-8
|
1.688
|
2.738
|
5.75
|
6
|
4.546
|
4.125
|
|
3
|
4
|
-
|
6-8
|
1.875
|
2.988
|
6.25
|
6.5
|
4.959
|
4.5
|
|
|
|
Dimensions in inches (1 inch=25.4 mm) source ASME B18.2.1 - table 7 Heavy Hex Screws
|
|
Publication date: 2010
|
|
d Thread size
|
UNC (nr of threads x inch)
|
UNF (nr of threads x inch)
|
UN (nr of threads x inch)
|
H basic
|
E min
|
LT (l< 6')
|
LT (l>6')
|
G min
|
F basic
|
|
3/8
|
16
|
24
|
-
|
0.234
|
0.360
|
1
|
1.25
|
0.763
|
0.688
|
|
1/2
|
13
|
20
|
-
|
0.313
|
0.482
|
1.25
|
1.5
|
0.96
|
0.875
|
|
5/8
|
11
|
18
|
-
|
0.391
|
0.605
|
1.50
|
1.75
|
1.175
|
1.063
|
|
3/4
|
10
|
16
|
-
|
0.469
|
0.729
|
1.75
|
2
|
1.383
|
1.25
|
|
7/8
|
9
|
14
|
-
|
0.547
|
0.852
|
2
|
2.25
|
1.589
|
1.438
|
|
1
|
8
|
12
|
-
|
0.609
|
0.976
|
2.25
|
2.5
|
1.769
|
1.625
|
|
1-1/8
|
7
|
12
|
8
|
0.688
|
1.098
|
2.5
|
2.75
|
2.002
|
1.813
|
|
1-1/4
|
7
|
12
|
8
|
0.781
|
1.223
|
2.75
|
3
|
2.209
|
2
|
|
1-3/8
|
6
|
12
|
8
|
0.844
|
1.345
|
3
|
3.25
|
2.416
|
2.188
|
|
1-1/2
|
6
|
12
|
8
|
0.938
|
1.470
|
3.25
|
3.5
|
2.622
|
2.375
|
|
1-5/8
|
6
|
-
|
6-8
|
1
|
1.591
|
3.5
|
3.75
|
2.829
|
2.563
|
|
1-3/4
|
5
|
-
|
6-8
|
1.094
|
1.716
|
3.75
|
4
|
3.035
|
2.75
|
|
1-7/8
|
-
|
-
|
6-8
|
1.156
|
1.839
|
4
|
4.25
|
3.242
|
2.938
|
|
2
|
4.5
|
-
|
6-8
|
1.219
|
1.964
|
4.25
|
4.5
|
3.449
|
3.125
|
|
2-1/4
|
4.5
|
-
|
6-8
|
1.375
|
2.214
|
|
5
|
3.862
|
3.5
|
|
2-1/2
|
4
|
-
|
6-8
|
1.219
|
2.461
|
|
5.5
|
4.275
|
3.875
|
|
2-3/4
|
4
|
-
|
6-8
|
1.063
|
2.711
|
|
6
|
4.688
|
4.25
|
|
3
|
4
|
-
|
6-8
|
1.875
|
2.961
|
|
6.5
|
5.102
|
4.625
|
|
3-1/4
|
4
|
-
|
6-8
|
2
|
3.210
|
|
7
|
5.515
|
5
|
|
3-1/2
|
4
|
-
|
6-8
|
2.25
|
3.461
|
|
7.5
|
5.928
|
5.375
|
|
3-3/4
|
4
|
-
|
6-8
|
2.375
|
3.710
|
|
8
|
6.341
|
5.75
|
|
4
|
4
|
-
|
6-8
|
2.5
|
3.960
|
|
8.5
|
6.755
|
6.125
|
|
4-1/4
|
4
|
-
|
6-8
|
2.75
|
4.222
|
|
9
|
7.168
|
6.5
|
|
4-1/2
|
-
|
-
|
4
|
2.875
|
4.472
|
|
9.5
|
7.581
|
6.875
|
|
4-3/4
|
|
|
|
3
|
4.722
|
|
10
|
7.994
|
7.25
|
|
5
|
|
|
|
3.125
|
4.972
|
|
10.5
|
8.408
|
7.625
|
|
5-1/4
|
|
|
|
3.375
|
5.222
|
|
11
|
8.821
|
8
|
|
5-1/2
|
|
|
|
3.5
|
5.472
|
|
11.5
|
9.234
|
8.375
|
|
5-3/4
|
|
|
|
3.625
|
5.722
|
|
12
|
9.647
|
8.75
|
|
6
|
|
|
|
3.75
|
5.972
|
|
12.5
|
10.060
|
9.125
|
Italy|经销商
Founded in 1969, Buora D.P.U. is a distributor certified following ISO 9001.
The company offers the complete range of high strength fasteners, ready on stock, both coarse and fine pitches with metric and inch threads.
Distributor of prestigious brands such as UNBRAKO and NORD-LOCK, for Buora D.P.U. the service always comes first, therefore there is not minimum quantity required.
Netherlands|经销商
Distributor of standard and special fasteners.
The company supplies fasteners with various types of thread: UNC, UNF, BSW and BSF. The products meet standards such as ISO, DIN, ASTM, ANSI and BS.
Germany|经销商
Distributor of inch sized fasteners, oil and gas fasteners and turned special screws
Brazil|生产商
Manufacturer of screws both in metric and inch sizes. Sizes from M3 to M64 with lengths up to 850mm
Thailand|生产商
Manufacturer of hex head screws, carriage bolts and socket cap screws
Italy|生产商
Manufacturer of hot forged fasteners and nip bolts, from M20 to M64
India|生产商
International manufacturer of high quality fixings and fasteners, active since 50 years. We have a variety of nuts, bolts, washers, screws, threaded bars, clamps, rivets, wire ropes, nails and raw material in M.S. S.S 316, 304 grades and brass.
UK|经销商
Distributor of fasteners for the industrial distribution market. We aim to create the best customer experience possible by putting our customers’ needs first. With a wide range of products and services, we provide customers with more options, making managing their fastener program easier.
Italy|生产商
We offer logistics and inventory management and integrated supply chain management services covering a wide market of OEM fasteners (KanBan), MRO and Personal Protective Equipment (Vending Machine).
Germany|经销商
Distributor of aerospace fasteners
Taiwan|生产商
Manufacturer of standard and special fasteners, from M4 to M30, from 1/4' to 1-1/4'. Lengths from 10 to 300mm and from 1/2' to 12'.
South Korea|生产商
Leader manufacturer of hexagon head screws for costruction and high tensile screws. Diameters from M12 to M36. Production plants in Korea, Vietnam and China
USA|生产商
Manufacturer of gaskets and inch fasteners
UK|生产商
Manufacturer of screws, threaded studs and threaded rods in metric and inch sizes
China|生产商
Manufacturer of hexagon head screws, socket cap screws, high strength fasteners
Annual capacity of 120,000 tons
Turkey|生产商
Manufacturer of metric and inch size fasteners
Germany|经销商
Distributor specialized in inch thread fasteners
Germany|生产商
Distributor of inch fasteners as per British and American standards
China|生产商
One of the largest fasteners manufacturer and exporter in China.
Hexagon and socket screws, high strength hex bolts (ASTM GR5 and GR8, DIN and ISO CL.8.8 and 10.9)
The surface plating includes Black, Zinc Bright, Zinc Yellow, Hot Dip Galvanize, Dacromet, Geomet and others.
UK|生产商
Manufacturer of special cold and hot forged nuts and bolts: Metric, UNF, UNC, BSF & BSW (Whitworth) threadforms
Chile|经销商
Manufacturer of structural boltings, inch sizes
India|生产商
Leading manufacturer of standard and special high tensile fasteners, supplier of leading customers in the automotive and industrial sectors.
India|生产商
Manufacturer of Hexagon head fasteners, flanged head screws, hammer head screws.Diameters M4÷M12. carbon iron and carbon steel
USA|生产商
Manufacturer of automotive fasteners and cold forged fasteners both in metric and inch sizes
USA|生产商
Manufacturer of inch bolts, nuts and stud bolts. Diameter from 3/4″ up to 26″ and lenghts from 1″ up to 36″
Mexico|生产商
Manufacturer of steel bolts, sizes from No.4 until 1-1/4” and lengths from 1/4” until 20”.
Thailand|生产商
Manufacturer of drywall screws, selftapping, selfdrilling and machine screws, hex head and sockets, threaded rods. Metric and inch sizes
India|生产商
Manufacturing and exports of High Tensile Automotive & Industrial Fasteners.
Our products also include stainless steel standards and specials, forged and machine parts.
USA|经销商
Manufacturer of all types of fasteners ranging in size from 3/8” to 4-1/4” for railroad, waterworks and industrial sector
China|生产商
Specialized manufacturer of steel hex nuts and bolts, HDG fasteners and for steel construction with an yearly production capacity of 110,000 M/T
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