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Head style
Socket cap
(1975)
Socket flat head
(1112)
Socket button head
(892)
Material
Stainless steel 18-8
(977)
Stainless steel 18-8 black oxide finish
(85)
Stainless steel 316
(642)
Chrome plated steel
(83)
Zinc plated alloy steel
(354)
Zinc plated class 12.9 alloy steel
(162)
Alloy steel black oxide finish
(1923)
Class 12.9 alloy steel black oxide finish
(567)
Diameter
US
#0
(22)
#1
(14)
#2
(41)
#3
(48)
#4
(119)
#5
(36)
#6
(159)
#8
(159)
#10
(323)
#12
(23)
1/4"
(342)
5/16"
(279)
3/8"
(269)
7/16"
(74)
1/2"
(228)
9/16"
(18)
5/8"
(84)
3/4"
(75)
7/8"
(50)
1"
(64)
1-1/8"
(21)
1-1/4"
(40)
1-3/8"
(12)
1-1/2"
(33)
Metric
1.6mm
(4)
2mm
(34)
2.5mm
(36)
3mm
(122)
4mm
(150)
5mm
(174)
6mm
(210)
8mm
(210)
10mm
(174)
12mm
(150)
14mm
(52)
16mm
(107)
18mm
(23)
Thread density
Coarse
6
(26)
7
(45)
8
(54)
9
(41)
10
(52)
11
(56)
12
(46)
13
(159)
14
(62)
16
(217)
18
(225)
20
(323)
24
(340)
32
(450)
40
(164)
48
(60)
56
(37)
Fine
12
(46)
14
(62)
16
(217)
18
(225)
20
(323)
24
(340)
28
(127)
32
(450)
36
(9)
40
(164)
48
(60)
64
(4)
72
(14)
80
(22)
Thread pitch
0.35mm
(4)
0.4mm
(34)
0.45mm
(36)
0.5mm
(122)
0.7mm
(150)
0.8mm
(174)
1.0mm
(219)
1.25mm
(227)
1.5mm
(174)
1.75mm
(138)
2.0mm
(145)
2.5mm
(23)
Length
US
1/16"
(1)
1/8"
(30)
5/32"
(1)
3/16"
(34)
7/32"
(1)
1/4"
(91)
5/16"
(47)
3/8"
(126)
7/16"
(25)
1/2"
(169)
9/16"
(11)
5/8"
(152)
3/4"
(190)
7/8"
(81)
1"
(186)
1-1/8"
(21)
1-1/4"
(138)
1-5/16"
(1)
1-3/8"
(16)
1-1/2"
(144)
1-5/8"
(8)
1-3/4"
(112)
1-7/8"
(8)
2"
(133)
2-1/4"
(54)
2-3/8"
(1)
2-1/2"
(115)
2-3/4"
(41)
3"
(106)
3-1/4"
(23)
3-1/2"
(71)
3-3/4"
(17)
4"
(69)
4-1/4"
(9)
4-3/8"
(1)
4-1/2"
(43)
4-3/4"
(9)
5"
(46)
5-1/4"
(3)
5-1/2"
(29)
5-3/4"
(1)
6"
(36)
6-1/2"
(19)
7"
(22)
7-1/2"
(12)
8"
(20)
8-1/2"
(6)
9"
(14)
9-1/2"
(5)
10"
(12)
10-1/2"
(1)
11"
(5)
11-1/2"
(1)
12"
(10)
13"
(2)
14"
(1)
15"
(2)
16"
(1)
Metric
3mm
(5)
4mm
(9)
5mm
(20)
6mm
(43)
8mm
(53)
10mm
(63)
12mm
(70)
14mm
(43)
16mm
(82)
18mm
(16)
20mm
(92)
22mm
(5)
25mm
(96)
30mm
(100)
35mm
(87)
40mm
(90)
45mm
(71)
50mm
(76)
55mm
(36)
60mm
(63)
65mm
(26)
70mm
(49)
75mm
(31)
80mm
(44)
85mm
(1)
90mm
(30)
100mm
(37)
110mm
(20)
120mm
(21)
130mm
(15)
140mm
(14)
150mm
(9)
160mm
(7)
170mm
(3)
180mm
(6)
190mm
(1)
200mm
(6)
220mm
(3)
240mm
(1)
250mm
(1)
260mm
(1)
Drive size
0.89mm
(12)
1.27mm
(45)
1.5mm
(37)
1/16"
(103)
5/64"
(149)
2mm
(100)
3/32"
(158)
2.5mm
(140)
7/64"
(66)
3mm
(158)
1/8"
(192)
9/64"
(69)
5/32"
(348)
4mm
(198)
3/16"
(300)
5mm
(208)
7/32"
(156)
6mm
(188)
1/4"
(137)
5/16"
(232)
8mm
(159)
3/8"
(197)
10mm
(124)
7/16"
(18)
12mm
(43)
1/2"
(83)
14mm
(84)
9/16"
(13)
5/8"
(64)
3/4"
(85)
7/8"
(61)
1"
(45)
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Socket screws
Socket screws, Allen
Socket screws, Allen
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