12-Point Flange Counterbore Screw, Alloy Steel, Plain Finish, Fine Thread, 5/16-24 x 1/2"
(Pack of
50)
• 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#: | 55917 |
|---|---|
| Type | Counter-Bor |
| Diameter | 5/16 " |
| Thread Pitch | 24 |
| Thread | Fine |
| Length | 1/2 " |
| Finish | Plain |
| Material | Alloy Steel |
| Head Style | 12-Point Flange |
| Size | 5/16-24 " |
| Specifications | IFI-115 |
| Tensile Strength | 180,000 PSI |
| UNSPSC #: | 31161620 |
| TAA Compliant: | Yes |
| Weight: | 0.92 lb |
