A fastener has a head with a plurality of recesses. Each recess is defined by opposed side surfaces and a floor surface. One or both side surfaces of each recess may be formed of a lower facet which is oriented at an obtuse angle to the floor surface, and an upper facet which is oriented at an acute angle with respect to the floor surface.

A method for drying to increase the useful life of botanicals and shorten the time to market after harvest of the botanicals. The method may include flash freezing the botanicals, at a desired optimal temperature range, soon after harvest. The method may include storing the frozen botanicals indefinitely prior to drying. The method may include drying the frozen botanicals using a lyophilizer at a desired optimal temperature and pressure.

A screw has a screw head and a shank extending downwardly from the screw head. The shank has a threaded segment, a cutting segment, and a tapered segment sequentially arranged downwardly, a thread spirally surrounding an external surface of the shank from the threaded segment to the tapered segment, multiple cutting ribs arranged around the external surface of the shank on the cutting segment of the shank, and multiple chip recesses formed between the cutting ribs. Each of the cutting ribs has a rounded crest to enlarge a drill hole and to reduce a resistance formed between the cutting ribs and the workpiece during drilling. The screw can be easily screwed into the workpiece with less driving force.

A screw includes a threaded shank and a head with a first surface. Communicating sockets formed in the first surface include a Pozi-type socket and a drive socket. The drive socket includes rounded portions, arched portions alternating with the rounded portions, and a conical portion connected to the rounded portions and the arched portions to define a first reference line and a second reference line parallel to a central axis of the head. The rounded portions are inclined outwardly from the first reference line, and the arched portions are inclined outwardly from the second reference line. Thus, a first room enclosed by the rounded portions and the arched portions increases gradually towards the first surface. By a combination of the above sockets, the head cooperates with different driving tools for delivering driving force efficiently and is more convenient to use.

Provided is a screw. A recess portion is formed at an end of the screw by extending a depth along a central axis direction of the screw. A tool matching structure is formed on a bottom surface of the recess portion for providing a tool that enters into the recess portion so as to make a part of the tool and the tool matching structure be matched to each other, thereby operating the tool to drive the screw for rotating.

An anti-vibration fastener, including a square flange bolt to affix a first object to a second object, the square flange bolt including a first threaded portion disposed at a front end of the square flange bolt, and a second threaded portion disposed at a rear end of the square flange bolt having a diameter smaller than a diameter of the first threaded portion, and a forward nut to encapsulate at least a portion of the square flange bolt such that the first object and the second object are disposed between the forward nut and the front end of the square flange bolt, and an aft nut to encapsulate at least a portion of the square flange bolt and the forward nut.

An anti-vibration fastener, including a square flange bolt to affix a first object to a second object, the square flange bolt including a first threaded portion disposed at a front end of the square flange bolt, and a second threaded portion disposed at a rear end of the square flange bolt having a diameter smaller than a diameter of the first threaded portion, and a forward nut to encapsulate at least a portion of the square flange bolt such that the first object and the second object are disposed between the forward nut and the front end of the square flange bolt, and an aft nut to encapsulate at least a portion of the square flange bolt and the forward nut.

Fasteners, drivers, punches, fastener systems, and methods of making fasteners, drivers, punches, and fastener systems are disclosed herein. The fasteners may include a recess having a groove in an inner transition surface. Corresponding drivers may include one or more stabilizing ribs for interfacing with the groove in the fastener recces for providing stability.

A driver for applying torque to threaded fasteners has a plurality of teeth extending along and projecting outwardly from a longitudinal axis of a body on which the teeth are located. The teeth have a helical twist about the longitudinal axis. Each tooth has an angularly oriented engagement surface which is engageable with similarly angularly oriented surfaces within recesses in the head of a compatible fastener. When the driver engages the recesses torque applied to the driver draws the driver deeper into the recesses as the engagement surfaces react against and slide over the angularly oriented surfaces within the recesses. The torque also causes the fastener to turn and advance or retract depending upon the sense of the torque and the angles of the engagement surfaces and the angles of the surfaces within the recesses. The fastener and its method of manufacture are also disclosed.

A fastening system including a bolt with a shank defining a bolt axis and a bolt head secured to the shank. The bolt head includes a bolt head body with two channels therein, and two slots aligned with the channels. The channels and the slots extend between oppositely positioned axis-parallel surfaces. The channels are partially defined by internal walls in the bolt head body. The bolt head includes a cap surface transverse to the bolt axis. The system also includes a tool with a blade defining a tool axis, with a tip located at the second end. The tip is receivable in the channels. To rotate the bolt, the tip is positioned in a selected one of the channels, to align the tool axis with the bolt axis. Rotation of the bolt is urged by the tool, when the tool is rotated about the tool axis.