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System of Measurement
Thread Size
Thread Pitch
Length
Finish
Material
Flat Head Profile
Countersink Angle
Threading
Drive Style
Thread Direction
Head Diameter
Head Height
Drive Size
Thread Spacing
Tensile Strength
Thread Fit
Hardness
Left-Hand Threaded Flat Head Screws
20 Products
Left-Hand Threaded Flat Head Screws
Tighten these screws by turning them to the left; once fastened, they prevent loosening from counterclockwise motion.
Part Number
Thread
Size
Size
Threading
Length
Thread
Type
Type
Head
Diameter
Diameter
Drive Size
Tensile
Strength
Strength
Material
Price
JBFBCABBA
4-40
Fully Threaded
1/4"
UNC
0.255"
1/16"
70,000 psi
18-8 Stainless Steel
$ 4.18
JBFBCABCA
4-40
Fully Threaded
1/2"
UNC
0.255"
1/16"
70,000 psi
18-8 Stainless Steel
$ 5.54
JBFBCABDA
6-32
Fully Threaded
1/4"
UNC
0.307"
5/64"
70,000 psi
18-8 Stainless Steel
$ 4.29
JBFBCABEA
6-32
Fully Threaded
1/2"
UNC
0.307"
5/64"
70,000 psi
18-8 Stainless Steel
$ 4.81
JBFBCABFA
8-32
Fully Threaded
1/2"
UNC
0.359"
3/32"
70,000 psi
18-8 Stainless Steel
$ 5.27
JBFBCABGA
8-32
Fully Threaded
3/4"
UNC
0.359"
3/32"
70,000 psi
18-8 Stainless Steel
$ 6.60
JBFBCABHA
10-32
Fully Threaded
1/2"
UNF
0.411"
1/8"
70,000 psi
18-8 Stainless Steel
$ 1.27
JBFBCABIA
10-32
Fully Threaded
3/4"
UNF
0.411"
1/8"
70,000 psi
18-8 Stainless Steel
$ 1.42
JBFBCABJA
1/4"-20
Fully Threaded
1/2"
UNC
0.531"
5/32"
70,000 psi
18-8 Stainless Steel
$ 1.50
JBFBCACBA
1/4"-20
Fully Threaded
1"
UNC
0.531"
5/32"
70,000 psi
18-8 Stainless Steel
$ 1.76
JBFBIABBA
M3
Fully Threaded
6 mm
Metric
6 mm
2 mm
70,000 psi
18-8 Stainless Steel
$ 4.59
JBFBIABCA
M3
Fully Threaded
10 mm
Metric
6 mm
2 mm
70,000 psi
18-8 Stainless Steel
$ 5.74
JBFBIABDA
M4
Fully Threaded
8 mm
Metric
8 mm
2.5 mm
70,000 psi
18-8 Stainless Steel
$ 5.27
JBFBIABEA
M4
Fully Threaded
12 mm
Metric
8 mm
2.5 mm
70,000 psi
18-8 Stainless Steel
$ 5.80
JBFBIABFA
M5
Fully Threaded
10 mm
Metric
10 mm
3 mm
70,000 psi
18-8 Stainless Steel
$ 1.22
JBFBIABGA
M5
Fully Threaded
16 mm
Metric
10 mm
3 mm
70,000 psi
18-8 Stainless Steel
$ 1.50
JBFBIABHA
M6
Fully Threaded
12 mm
Metric
12 mm
4 mm
70,000 psi
18-8 Stainless Steel
$ 1.65
JBFBIABIA
M6
Fully Threaded
20 mm
Metric
12 mm
4 mm
70,000 psi
18-8 Stainless Steel
$ 1.77
JBFBIABJA
M8
Fully Threaded
16 mm
Metric
16 mm
5 mm
70,000 psi
18-8 Stainless Steel
$ 2.51
JBFBIACBA
M8
Fully Threaded
25 mm
Metric
16 mm
5 mm
70,000 psi
18-8 Stainless Steel
$ 3.70