
Suppliers of Square head bolts, inch series
This product is regulated by the following standards:
Technical data
Square head bolts, inch series


This product is regulated by the following standards:
Standard ASME B18.2.1 TABLE 1
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Dimensions in inches (1 inch=25.4 mm) source ASME B18.2.1 - Square Head Bolts Table 1 | ||||||||
Publication date: 2010 | ||||||||
d Thread size | UNC (nr of threads x inch) | UNF (nr of threads x inch) | H basic | E min | b (l< 6') | b (l> 6') | F basic | G basic |
1/4 | 20 | 28 | 11/64 | 0.237 | 0.75 | 1 | 3/8 | 0.498 |
5/16 | ||||||||
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 |
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Dimensions in inches (1 inch=25.4 mm) source ASME B18.2.1 - Askew Head Bolts Table 6 | |||||||||
Publication date: 2010 | |||||||||
d Thread size | UNC (nr of threads x inch) | UNF (nr of threads x inch) | H1 min | H ref | E min | LT (l< 6') | LT (l> 6') | G min | F basic |
3/8 | |||||||||
1/2 | |||||||||
5/8 | |||||||||
3/4 | |||||||||
7/8 | |||||||||
1 |
Standard ASME B18.2.1 TABLE 4
Askew head boltsInformation restricted to registered users: Login | Register now for a 14 day free trial
Dimensions in inches (1 inch=25.4 mm) source ASME B18.2.1 - Askew Head Bolts Table 6 | |||||||||
Publication date: 2010 | |||||||||
d Thread size | UNC (nr of threads x inch) | UNF (nr of threads x inch) | H1 min | H ref | E min | LT (l< 6') | LT (l> 6') | G min | F basic |
3/8 | 16 | 24 | 0.277 | 0.25 | 0.36 | 1 | 1.25 | 0.747 | 0.563 |
1/2 | |||||||||
5/8 | |||||||||
3/4 | |||||||||
7/8 | |||||||||
1 |
Details
Square head bolts, inch series


Dimensions in inches (1 inch=25.4 mm) source ASME B18.2.1 - Square Head Bolts Table 1 |
||||||||
Publication date: 2010 | ||||||||
d Thread size
|
UNC (nr of threads x inch) | UNF (nr of threads x inch) |
H basic
|
E min |
b (l< 6')
|
b (l> 6')
|
F basic
|
G basic |
1/4
|
20 | 28 | 11/64 | 0.237 | 0.75 | 1 | 3/8 | 0.498 |
5/16
|
18 | 24 | 13/64 | 0.298 | 0.875 | 1.125 | 1/2 | 0.665 |
3/8
|
16 | 24 | 1/4 | 0.360 | 1 | 1.25 | 9/16 | 0.747 |
7/16
|
14 | 20 | 18/64 | 0.421 | 1.125 | 1.375 | 5/8 | 0.828 |
1/2
|
13 | 20 | 21/64 | 0.482 | 1.25 | 1.5 | 3/4 | 0.995 |
5/8
|
11 | 18 | 27/64 | 0.605 | 1.5 | 1.75 | 15/16 | 1.244 |
3/4
|
10 | 16 | 1/2 | 0.729 | 1.75 | 2 | 1 1/8 | 1.494 |
7/8
|
9 | 14 | 19/32 | 0.852 | 2 | 2.25 | 1 5/16 | 1.742 |
1
|
8 | 12 | 21/32 | 0.976 | 2.25 | 2.5 | 1 1/2 | 1.991 |
1 1/8 | 7 | 12 | 3/4 | 1.098 | 2.25 | 2.75 | 1 11/16 | 2.239 |
1 1/4 | 7 | 12 | 27/32 | 1.223 | 2.75 | 3 | 1 7/8 | 2.489 |
1 3/8 | 6 | 12 | 29/32 | 1.345 | 3 | 3.25 | 2 1/16 | 2.738 |
1 1/2 | 6 | 12 | 1 | 1.470 | 3.25 | 3.5 | 2 1/4 | 2.986 |
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|||||||||
Dimensions in inches (1 inch=25.4 mm) source ASME B18.2.1 - Askew Head Bolts Table 6 |
|||||||||
Publication date: 2010 | |||||||||
d Thread size
|
UNC (nr of threads x inch) |
UNF (nr of threads x inch) |
H1 min | H ref | E min |
LT (l< 6')
|
LT (l> 6')
|
G min
|
F basic
|
3/8
|
16 | 24 | 0.277 | 0.25 | 0.36 |
1
|
1.25
|
0.747 | 0.563 |
1/2
|
13 | 20 | 0.371 | 0.328 | 0.482 |
1.25
|
1.5
|
0.995 | 0.75 |
5/8
|
11 | 18 | 0.480 | 0.422 | 0.605 |
1.5
|
1.75
|
1.244 | 0.938 |
3/4
|
10 | 16 | 0.574 | 0.5 | 0.729 |
1.75
|
2
|
1.494 | 1.125 |
7/8
|
9 | 14 | 0.683 | 0.594 | 0.852 |
2
|
2.25
|
1.742 | 1.313 |
1
|
8 | 12 | 0.761 | 0.656 | 0.976 |
2.25
|
2.5
|
1.991 | 1.5 |
Full list of Suppliers of Square head bolts, inch series

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.
Distributor of inch sized fasteners, oil and gas fasteners and turned special screws
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).
Manufacturer of special cold and hot forged nuts and bolts: Metric, UNF, UNC, BSF & BSW (Whitworth) threadforms
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