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Technical data for Socket head cap screws, inch series
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This product is regulated by the following standards:
Standard ASME B18.3 TABLE 1G
Hexagon socket head cap screws with low head. This product, although a high-strenght precision fastener, is recommended for lighter fastening applications. It is not suggested for use in critical high-strenght applications where socket head cap screws should normally be used. They are designed to be used in applications where head height clearance is a problem. Because of their reduced head height and smaller socket size, they normally cannot be properly preloaded as a standard socket cap screw and should not be subjected to high dynamic loads.
Dimensions in inches - source ASME B18.3 table 1G - 2008- Low head Hex Socket Cap Screws
d basic thread size
Nr of threads x inch
A max
H min
D min
T min
J hex socket
inches
mm
UNC
UNF
4 (0.1129
5 (0.125)
6 (0.138)
8 (0.164)
10 (0.19)
1/4
5/16
3/8
7/16
1/2
5/8
The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from IFI – Industrial Fastener Institute, 6363 Oak Tree Blvd Independence, OH 44131, USA. WARNING - The datasheets provided by this site (fasten.it) are only advisory in support of the commercial activity and their use by anyone is entirely voluntary. Reliance on their contents for any purpose by anyone is at his/her sole risk and Fasten.it s.r.l./www.fasten.it is not responsible for any loss, claim or damage arising there from.
Standard ASME B18.3 TABLE 3
Hex and spline socket button head cap screws
Dimensions in inches - source ASME B18.3 table 3 - 2008 hex and spline socket button head cap screws
d basic thread size
Nr of threads x inch
A max
H min
L max standard
T min
J hex socket
M spline socket
inches
mm
UNC
UNF
0 (0.06)
1 (0.073)
2 (0.086)
3 (0.099)
4 (0.1129
5 (0.125)
6 (0.138)
8 (0.164)
10 (0.19)
1/4
5/16
3/8
1/2
5/8
The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from IFI – Industrial Fastener Institute, 6363 Oak Tree Blvd Independence, OH 44131, USA. WARNING - The datasheets provided by this site (fasten.it) are only advisory in support of the commercial activity and their use by anyone is entirely voluntary. Reliance on their contents for any purpose by anyone is at his/her sole risk and Fasten.it s.r.l./www.fasten.it is not responsible for any loss, claim or damage arising there from.
Standard ASME B18.3 TABLE 1A
Hexagon socket head cap screws. The socket head shall have a flat chamfered top surface with smooth or knurled cylindrical sides and a flat bearing surface.
Dimensions in inches - source ASME B18.3 table 1A
Publication date: 2003
d basic thread size
Nr of threads x inch
dk max
k max
t min
b min
S nom
M nom
inches
mm
UNC
UNF
0
1.52
-
80
0.096
0.060
0.025
0.5
0.05
0.06
N° 1
1.85
64
72
0.118
0.073
0.031
0.62
0.062
0.072
N° 2
2.18
56
64
0.140
0.086
0.038
0.62
0.078
0.096
N° 3
N° 4
N° 5
N° 6
N° 8
N° 10
1/4
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
1 3/4
2
2-1/4
2-1/2
2-3/4
3
3-1/4
3-1/2
3-3/4
4
Approx. mass, in kg x1000 pcs, (ρ=7,85 kg/dm3) -
d thread size
4-40
6-32
8-32
10-24
10-32
1/4
5/16
3/8
7/16
1/2
5/8
3/4
nominal length l
1/4
0,53
0,93
1,49
2,19
2,25
5/16
0,58
1,01
1,61
2,36
2,43
4,37
3/8
0,64
1,10
1,74
2,51
2,60
4,65
8,41
7/16
0,70
1,19
1,87
2,68
2,78
4,95
8,88
1/2
5/8
3/4
7/8
1
1-1/4
1-1/2
1-3/4
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
6-1/4
6-1/2
6-3/4
7
The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from IFI – Industrial Fastener Institute, 6363 Oak Tree Blvd Independence, OH 44131, USA. WARNING - The datasheets provided by this site (fasten.it) are only advisory in support of the commercial activity and their use by anyone is entirely voluntary. Reliance on their contents for any purpose by anyone is at his/her sole risk and Fasten.it s.r.l./www.fasten.it is not responsible for any loss, claim or damage arising there from.
Standard ASME B18.3 TABLE 2A
Attention
This standard has been withdrawn
Socket Flat Countersunk Head Cap Screws. The flat countersunk head shall have a flat top sur-face and a conical bearing surface with included angle of approximately 82 deg.
Dimensions in inches - ASME b18.3Table 2A - 2008- Socket Flat Countersunk Head Cap Screws
d thread size
Nr. of threads x inch
d1 min
b basic thread length
dk max theo.Sharp
k max
t min
S nom
M nom
inches
mm
UNC
UNF
0 (0.06)
1.52
-
80
0.568
0.5
0.138
0.044
0.025
0.035
0.048
1 (0.073)
2 (0.086)
3 0.099)
4 (0.112)
5 (0.125)
6 (0.138)
8 (0.164)
10 (0.19)
1/4
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
The definitive version for the implementation of this standard is the edition bearing the most recent date of issue, obtainable from IFI – Industrial Fastener Institute, 6363 Oak Tree Blvd Independence, OH 44131, USA. WARNING - The datasheets provided by this site (fasten.it) are only advisory in support of the commercial activity and their use by anyone is entirely voluntary. Reliance on their contents for any purpose by anyone is at his/her sole risk and Fasten.it s.r.l./www.fasten.it is not responsible for any loss, claim or damage arising there from.
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Socket head cap screws, inch series
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Suppliers of Socket head cap screws, inch series
This product is regulated by the following standards:
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.
CERTIFICATIONS: UNI EN ISO 9001:2015
NETHERLANDS
Triofast BV
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
PFITZER Verbindungstechnik GmbH
Distributor of inch sized fasteners, oil and gas fasteners and turned special screws
INFORMATION RESTRICTED TO THE REGISTERED USERS
THAILAND
B...
Manufacturer of hex head screws, carriage bolts and socket cap screws
CERTIFICATIONS: ISO 9001-2008 | ISO 14001-2004
INFORMATION RESTRICTED TO THE REGISTERED USERS
ITALY
B...
Manufacturer of hot forged fasteners and nip bolts, from M20 to M64
CERTIFICATIONS: ISO 9001:2008
INFORMATION RESTRICTED TO THE REGISTERED USERS
INDIA
C...
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.
INFORMATION RESTRICTED TO THE REGISTERED USERS
UNITED KINGDOM
C...
Manufacturer of socket screws and Tee Slot Bolts both metric and imperial
INFORMATION RESTRICTED TO THE REGISTERED USERS
UNITED KINGDOM
E...
Distributor of fasteners
INFORMATION RESTRICTED TO THE REGISTERED USERS
ITALY
F...
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).
INFORMATION RESTRICTED TO THE REGISTERED USERS
TAIWAN
F...
One of the main producers of socket cap screws in haig tensile steels: 10.9 12.9 14.99
CERTIFICATIONS: ISO/TS 16949:2002 | ISO 9001:2000 | TAF Certification