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System of Measurement
Inch
Metric
Thread Size
8-32
10-32
1/4"
-20
1/4"
-28
5/16"
-18
5/16"
-24
3/8"
-16
3/8"
-24
1/2"
-13
1/2"
-20
5/8"
-11
M6
M8
M10
M12
Length
5
/
3
2
"
3
/
1
6
"
1
/
4
"
5
/
1
6
"
3
/
8
"
7
/
1
6
"
1
/
2
"
5
/
8
"
3
/
4
"
1
3
/
1
6
"
2
7
/
3
2
"
7
/
8
"
1
"
1
3
/
3
2
"
1
1
/
8
"
Material
651 Silicon Bronze
Brass
Grade 5 Titanium
Stainless Steel
Steel
Fastener Head Type
12-Point
Flat
Headless
Hex
Rounded
Socket
Threading
Fully Threaded
Partially Threaded
Drive Style
External 12-Point
External Hex
Hex
Phillips
Torx Plus
Finish
Black Oxide
Cadmium Plated
Chrome Plated
Passivated
Phosphate Coated
Zinc Flake Coated
Zinc Plated
Zinc Yellow-Chromate Plated
Thread Type
UNF
UNRF
Tip Type
Cone
Cup
Extended
Flat
Soft
Head Width
5/16"
3/8"
7/16"
1/2"
5/8"
13/16"
15/16"
Head Height
5/32"
0.166"
0.198"
13/64"
0.218"
7/32"
0.312"
5/16"
21/64"
Drive Size
5/32"
3/16"
1/4"
5/16"
3/8"
IP40
IP45
No. 4
T40
Fastener Strength Grade/Class
SAE Grade 5
SAE Grade 8
Specifications Met
ASME Standard
ASTM Standard
DIN Standard
Federal Specification
IFI Standard
ISO 4762
NAS
SAE J429
Socket Head Profile
Low
Standard
Head Diameter
7/16"
15/32"
0.469"
0.547"
0.615"
0.656"
Width
1/4"
5/16"
3/8"
1/2"
5/8"
3/4"
10 mm
13 mm
17 mm
19 mm
Tensile Strength
Less than 100,000 psi
100,000 psi to 119,999 psi
120,000 psi to 139,999 psi
140,000 psi to 159,999 psi
160,000 psi or greater
DFARS Specialty Metals
Compliant
Exempt
Not Compliant
Export Control Classification Number (ECCN)
EAR99
REACH
Compliant
Not Compliant
RoHS
Compliant
Compliant with Exemptions
Not Compliant
Hardness
Rockwell B55
Rockwell B70
Rockwell B74
Rockwell B80
Rockwell B85
Rockwell C22
Rockwell C25
Rockwell C26
Rockwell C28
Rockwell C32
Rockwell C33
Rockwell C36
Rockwell C37
Rockwell C38
Rockwell C39
Rockwell C45
Not Rated
Thread Fit
Unified Standard Class 2A
Unified Standard Class 3A
Thread Length
3/16"
1/4"
5/16"
3/8"
7/16"
1/2"
17/32"
9/16"
5/8"
3/4"
1"
1
1/8"
11 mm
13 mm
16 mm
20 mm
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516 Products
Fabricating and Machining
Locating and Support Buttons
Secure and position workpieces and fixtures from the bottom or side
46 products
Fastening and Joining
Hex Head Screws
Used with nuts to create a stronger joint than flat and rounded screws
152 products
Socket Head Screws
With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold
92 products
Rounded Head Screws
Sit just above the surface for a low-profile finish and hold tighter than flat head screws
49 products
Flat Head Screws
Fit in countersunk holes for a flush finish
43 products
12-Point Screws
12 contact points handle more torque than a hex head while a flange eliminates the need for a washer
19 products
Set Screws
Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads
112 products
The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)