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  3. Head Hollow Hex Bolts
  4. Hexalobular hole screw bolt countersunk head (Azumaneji Co., Ltd.)
Hexalobular hole screw bolt countersunk head-HLF0204
Hexalobular hole screw bolt countersunk head-Azumaneji Co., Ltd.

Hexalobular hole screw bolt countersunk head
Azumaneji Co., Ltd.

About This Product

■Screw with hexalobular hole

A hexalobular hole is a star-shaped hexagonal recess developed by Textron in the United States in 1971, and is also called a 6lobe. Hexalobular means "six leaflets". The biggest feature of the hexalobular hole is its high torque transmission efficiency, which reduces the burden on tools, makes the head smaller and thinner, and suppresses cam-out during construction. This is due to the fact that the force (tangential force of the tightening torque) acts approximately perpendicularly (approximately 75°) to the contact surface between the tool and the recess, and assuming that there is no clearance or friction between the tool and the recess. High torque transmission efficiency of up to approximately 93% (25% for hexagonal sockets). Additionally, hexalobular holes were standardized as ISO 10664 in 1999 and as JIS B 1015 in 2001, contributing to the standardization of parts. On the other hand, screws with hexalobular holes are sometimes used to prevent tampering, but as the tools have become more widespread due to standardization, they are not as effective as expected. Azumaneji has a separate line of screws designed to prevent tampering.

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    Hexalobular hole screw bolt countersunk head

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1 Models of Hexalobular hole screw bolt countersunk head

Image Part Number Price (excluding tax) Hole number Material Representative part number
Hexalobular hole screw bolt countersunk head-Part Number-HLF0204

HLF0204

Available upon quote

6

Made of steel (trivalent chromate)

HLF

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About Company Handling This Product

Azumaneji Co., Ltd.

  • Japan

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