Counterbore Screw 5/16-18 x 2"
(Pack of
25)
Countr-Bor Screws generate higher clamp loads because they are torqued through an external drive (socket); standard hex socket head screws are torqued by an internal drive (hex key)
Heat-treated alloy steel
Class 3A UNC threads
Tensile strength: 180,000 PSI (up to and including 1/2" dia.); 170,000 PSI (over 1/2" dia.)
ANSI Specification B1.1
All dimensional properties meet IFI-115 and SAE J58 specifications
Lawson Countr-Bor Screws can replace any standard hex socket head screw
12-point screw fits into same counter-bore hole use standard 12 point socket
NOTE: Use a wrench or socket size which corresponds to the diameter of the screw. For example, a 5/16" dia. screw is installed by using a 5/16", 12 point standard socket.
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Product Description
Countr-Bor Screws generate higher clamp loads because they are torqued through an external drive (socket); standard hex socket head screws are torqued by an internal drive (hex key) Heat-treated alloy steel
Class 3A UNC threads
Tensile strength: 180,000 PSI (up to and including 1/2" dia.); 170,000 PSI (over 1/2" dia.)
ANSI Specification B1.1
All dimensional properties meet IFI-115 and SAE J58 specifications
Lawson Countr-Bor Screws can replace any standard hex socket head screw
12-point screw fits into same counter-bore hole use standard 12 point socket
NOTE: Use a wrench or socket size which corresponds to the diameter of the screw. For example, a 5/16" dia. screw is installed by using a 5/16", 12 point standard socket.
Technical Specifications
Item#: | 85291 |
---|---|
Type | Counter-Bor |
Diameter | 5/16 " |
Thread Pitch | 18 |
Thread | Coarse |
Length | 2 " |
Finish | Plain |
Material | Alloy Steel |
Head Style | 12-Point Flange |
Size | 5/16X2 " |
Specifications | IFI-115 |
Tensile Strength | 180,000 PSI |
UNSPSC #: | 31161620 |
TAA Compliant: | Yes |
Weight: | 1.14 lb |
Product Restrictions



