Spanner-Bolts". Loss Prevention Fasteners. Ultra Fasteners Inc. Archived from the original on 2015-09-26 . Retrieved 2015-09-25. Tamper-resistant types [ edit ] A set of "secure" or otherwise less common screwdriver bits, including secure Torx and secure hex or "allen" variants. ISO Fastener Standards Should Be Referenced for All Metric Fasteners" (PDF). Archived (PDF) from the original on 2021-06-26 . Retrieved 2021-10-16. Reed & Prince Manufacturing Corporation: Welcome". Reedandprincemfg.com. Archived from the original on 2012-04-25 . Retrieved 2012-03-12. Docter, Quentin; Dulaney, Emmett; Skandier, Toby (2006). CompTIA A+ Complete Study Guide. John Wiley and Sons. p.766. ISBN 978-0-470-04831-3. Archived from the original on 2017-02-21 . Retrieved 2016-09-24.

PH) (PZ) ISO 8764 PH drivers [31] are nearly identical to JIS B 1012 drivers. ISO 8764 has superseded JIS B 1012 in Japan as well as being used in many other countries. The standard specifies that drivers and bits are to be marked with a "PH" or "PZ" followed by the size number (000, 00, 0, 1, 2, 3), though not all manufacturers do this. [32] Finally, we wouldn’t write Halfords Advanced on the tools if they didn’t come with a lifetime guarantee! Should a Halfords Advanced hand tool fail whilst being used for the job it was designed for, it will be replaced. Simply return the product to your nearest Halfords store.Tri-Wing Screwdriver. "Tri-wing screwdriver: Types". Triwingscrewdrivers.com. Archived from the original on 2012-03-23 . Retrieved 2012-03-12. The Ultra-Lok, and Ultra-Lok II are some of these designs that use custom keyed drivers, which tend to be confined to industrial and institutional uses that are unavailable to the average layperson. Key-Rex screws are another design, and are used in such things as ballot boxes and bank vaults. [41]

Screw head types / Product Guides / Service / Information & Services / England / Home— Wiha | Screwdrivers L-Keys Bits Pliers Online Shop| Premium Tools for Professionals". 2008-02-13. Archived from the original on 2008-02-13 . Retrieved 2012-03-12. The polydrive screw drive, also known as RIBE, [74] is spline-shaped with rounded ends in the fastener head. The tool has six flat teeth at equal spacing; the sizes are determined by the diameter of the star points. Its primary advantage over older screw drives is that it resists cam out. It is used primarily in the automotive industry in high-torque applications, such as brakes and driveshafts. The 12-pointed internal star shape superficially resembles the "double hex" fastener head, but differs subtly in that the points are shaped to an internal angle of 90° (derived from a square), rather than the 120° internal angle of a hexagon. In practice, drivers for the fasteners may be interchangeable, but should be examined carefully for proper fit before application of force. A hex key should not be used where a key of square cross-section is the correct fit. United States Maritime Service Institute. (1949). Engine Room Tools. New York: Mast Magazine Association. p. 25 Tork-Nuts". Loss Prevention Fasteners. Ultra Fasteners Inc. Archived from the original on 2015-09-26 . Retrieved 2015-09-25.

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Torx Paralobe is a further improvement over Torx Plus, [48] claiming 50% increased drive system torque over Torx and 20% over Torx Plus. The Phillips/square screw drive, also known as the Quadrex, Pozisquare screw drive, is a combination of the Phillips and Robertson screw drives. While a standard Phillips or Robertson tool can be used, there is also a dedicated tool for it that increases the surface area between the tool and the fastener so it can handle more torque. [62] Recex [ edit ] Triangular recesses and heads". Screw drive systems. Archived from the original on 2016-10-24 . Retrieved 2017-09-02.

The Phillips Screw Company". www.phillips-screw.com. Archived from the original on 2014-12-21 . Retrieved 2015-01-16. The following are screw drives based on a cruciform shape; i.e., a cross shape. Other names for these types of drives are cross recessed, cross-head, cross tip, and cross-point. A double slotted screw drive is not considered cruciform because the shape is not recessed, and consists only of two superimposed simple milled slots. Some of these types are specified in ISO 4757, Cross recesses for screws. Triple-square fasteners are referred to as "spline" in the UK. This is potentially confusing if looking for the more unusual 12-spline flange type. While they are distinguished under close inspection by the angle at the tip of each of the 12 points (with a 90° angle on the XZN, instead of 60°) the general similarity and ability to insert the wrong tool can cause damage to the head. Adler, Alexander (1998-05-18). Testing and Understanding Screwdriver Bit Wear (Master's thesis). Virginia Tech. hdl: 10919/36701. Avsafe". www.losspreventionfasteners.com. Archived from the original on 2017-03-01 . Retrieved 2017-02-28.A thumbscrew is a type of screw drive with either a tall head and ridged or knurled sides, or a key-like flat-sided vertical head. They are intended to be tightened and loosened by hand, and are usually not found in structural applications. They are sometimes also cut for Phillips head or slotted screwdrivers, as well as having the knurling for finger grip. ASME Standard 18.6.8 covers dimensions for Type A (shoulder under the head), regular and heavy, along with Type B (without shoulder), regular and heavy. They can be found on many computer cases, and in other locations where easy access without tools is desired. ISO 8764-2:2004(E) Assembly tools for screws and nuts — Screwdrivers for cross-recessed head screws — Part 2: General requirements, lengths of blades and marking of hand-operated screwdrivers" (PDF). Archived (PDF) from the original on 2023-04-30 . Retrieved 2023-05-01. A correctly sized JIS driver will engage at full depth into a Phillips or Pozidriv head screw slightly loosely, but without damage. JIS heads are often identified by a single dot or an "X" to one side of the cross slot. [30] Wilder, George. "What are the differences between the two types of drive– Phillips and Posidriv?" (PDF). v8register. Archived (PDF) from the original on 2016-04-09 . Retrieved 2017-09-02.

Slot screw drives have a single horizontal indentation (the slot) in the fastener head and is driven by a "common blade" or flat-bladed screwdriver. This form was the first type of screw drive to be developed, and for centuries, it was the simplest and cheapest to make because it can just be sawed or filed. Additionally, it is unique because the slot head is straightforward to manufacture, and because it can be driven by a simple handtool. The slotted screw is commonly found in existing products and installations, along with use in simple carpentry work and in applications where minimal torque is needed. Slot screws are also used in the restoration of antique furniture, vehicles, and equipment.

The Slotted/Pozidriv is slightly different from the Slotted/Phillips (PH/S), and good use requires special screwdrivers. [ citation needed] ACR Phillips II Plus [ edit ] Screw Holding Screw Driver" (PDF). Audiocraft Magazine: 7. April 1956. Archived (PDF) from the original on 2021-10-16 . Retrieved 2018-09-17. ISO 8764-1:2004(E) Assembly tools for screws and nuts — Screwdrivers for cross-recessed head screws — Part 1: Driver tips" (PDF). Archived (PDF) from the original on 2023-04-30 . Retrieved 2023-05-01. a b c "Unterschied zwischen Pozidrive und Superdrive"[Difference between Pozidriv and Supadriv] (in German). Goedkopeschroevenkopen.nl. Archived from the original on February 22, 2014 . Retrieved 2014-03-20.