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Screw with a square socket in the head
A Robertson screw, also known as a square screw or Scrulox, is a type of screw with a square-shaped socket in the screw head and a corresponding square
Robertson_screw
At a minimum, a screw drive is a set of shaped cavities and protrusions on the screw head that allows torque to be applied to it. Usually, it also involves
List_of_screw_drives
Canadian inventor, industrialist, salesman, and philanthropist
philanthropist who popularized the square-socket drive for screws, often called the Robertson drive. Although a square-socket drive had been conceived decades
P._L._Robertson
Hand tool used for turning screws
industrial manufacture. Canadian P.L. Robertson, though he was not the first person to patent the idea of socket-head screws, was the first to successfully commercialize
Screwdriver
Hand tool for loosening threaded fasteners, with a powerful intermittent action
Canadian Peter Robertson for inventing the square-head screw that bears his name. The Robertson screw represented a significant advance in the history of
Impact_driver
Type of screw
(Robertson). In the UK, the term "set screw" or "setscrew" refers simply to a bolt which is fully threaded, with no smooth shank; called cap screw in
Set_screw
Screwdriver slippage
assembled with Torx or Pozidriv head screws, which are specifically designed to resist cam-out. Robertson screws are commonplace in Canada, and significantly
Cam_out
Type of fastener characterized by a thread wrapped around a cylinder core
A screw is an externally helical threaded fastener capable of being tightened or released by a twisting force (torque) to the head. The most common use
Screw
Canadian documentary television series
computer-generated graphics. Subjects range from the Wonderbra, snowmobile and Robertson screw to Canadarm, the discovery of stem cells, electronic music, standard
Canadian_Made
Driver for hexagonal socketed bolts or screws
only 2 years after Robertson's Canadian patent.) This cost problem drove SPS to purchase its first screw machine and make its screws in-house, which led
Hex_key
Tamper-resistant screw
The pentalobe security screw (Apple nomenclature), or pentalobe screw drive, is a five-pointed tamper-resistant system used by companies including Apple
Pentalobe_screw
invented by Norman James Breakey of Toronto in 1940 Robertson screw – invented by Peter L. Robertson in 1908 Rotary vane pump – invented by Charles Barnes
List of Canadian inventions, innovations, and discoveries
List_of_Canadian_inventions,_innovations,_and_discoveries
Canadian singer, songwriter and guitarist (1943–2023)
Jaime Royal "Robbie" Robertson OC (July 5, 1943 – August 9, 2023) was a Canadian musician, composer, and producer. Robertson was the onetime lead guitarist
Robbie_Robertson
City in Ontario, Canada
Angeles Kings goaltender Cam Talbot. Birthplace of Peter Robertson, inventor of the Robertson screw. Birthplace of Andrew Campbell, former Toronto Maple Leafs
Haldimand_County
Naismith (1861–1939) – invented basketball P. L. Robertson (1879–1951) – invented the Robertson screw Henry Ruttan (1792–1871) – invented air-conditioned
Lists_of_Canadians
Town in Canada
Milton was well known for the P.L. Robertson Manufacturing Company — the first manufacturer to make socket-head screws. Although founded in Hamilton in
Milton,_Ontario
Shape with four equal sides and angles
feature prominent nested square alignment marks in three corners. Robertson screws have a square drive socket. Crackers and sliced cheese are often square
Square
Hardware used to secure parts of a PC to the case
more #6-32 UNC screws hold the main cover on the case They are almost always provided with a #2 Phillips drive. Sometimes a Green Robertson or Torx drive
Computer_case_screws
Detachable tool tips used for driving screws
drive screws, typically with a hand-operated screwdriver, drill, or impact driver. Interchangeable bits allow a single tool to work with many screw types
Screwdriver_bit
Canadian TV series or program
Telephone Light bulb Five-pin bowling Wonderbra Artificial pacemaker Robertson screw Zipper Electric wheelchair Poutine Cobalt-60 "bomb" cancer treatment
The Greatest Canadian Invention
The_Greatest_Canadian_Invention
Former boatyard in Sandbank, Argyll and Bute, Scotland
Alexander Robertson & Sons was a boatyard in Sandbank, Argyll and Bute, Scotland, from 1876 to 1980. The yard was located on the shore of the Holy Loch
Alexander_Robertson_&_Sons
Month of 1910
1907. The Robertson screw is not common in the U.S. (where it is called the "square drive screw") but "accounts for over 75% of all screws sold in Canada"
November_1910
Dutch-Canadian businessman and auto restorer
proven due to the fact that Kuipers found the body intact with original Robertson screws, which were not used in American models. Canadian automotive historian
Gerry_Kuipers
Type of steam-powered warship
Steam frigates (including screw frigates) and the smaller steam corvettes, steam sloops, steam gunboats and steam schooners were steam-powered warships
Steam_frigate
Propeller-driven sloop-of-war
(1846). "The paddle-Wheel and screw their comparative powers of speed". The Mechanic's Magazine. Vol. XLV. Robertson, London. p. 365-371. ISBN 978-1-347-61485-3
Screw_sloop
Book by Witold Rybczynski
improvements such as slotted screws came into being. Rybczynski spends some time discussing the Canadian invention, the Robertson screwdriver. The book has
One Good Turn (Rybczynski book)
One_Good_Turn_(Rybczynski_book)
English musician (born 1958)
Thomas Morgan Robertson (born 14 October 1958), known by the stage name Thomas Dolby, is an English musician, record producer, composer, entrepreneur
Thomas_Dolby
Screw drive with 6-lobed star-shaped flower-petal pattern
Torx (pronounced /tɔːrks/) is a brand of screw drive characterized by a 6-point star-shaped pattern, developed in 1967 by Camcar Textron. A popular generic
Torx
Painting by Henri Matisse
wrong way, as well as screw holes which implied that it had been hung upside down before. List of works by Henri Matisse Robertson, Nan. "Modern Museum
The_Boat_(Matisse)
Season of television series
frustrated by the lock (using a Phillips-head screwdriver to unscrew three Robertson screws), fails due to confusing 8-foot (2.4 m) for 80-inch (2,000 mm) and
Canada's_Worst_Handyman_3
President of the United States (2017–2021; since 2025)
July 16, 2026. Aspan, Maria (August 14, 2025). "Trump is tightening the screws on corporate America — and CEOs are staying mum". NPR News. Retrieved August
Donald_Trump
Linear crystallographic defect or irregularity
Lomer–Cottrell junction. The two main types of mobile dislocations are edge and screw dislocations. Edge dislocations can be visualized as being caused by the
Dislocation
1998 non-fiction New York Times bestseller book by Robert Greene somali
he views Greene's work as "more as an empowerment tool than as a way to screw people." Jerry Adler, writing in Newsweek, lists ways the laws contradict
The_48_Laws_of_Power
Ongoing armed conflict in West Asia
original on 20 April 2026. Retrieved 14 April 2026. "Trump Tightens the Screws on Iran's Oil". Brookings Institution. 29 June 2018. Retrieved 28 February
2026_Iran_war
2005 non-fiction book by Bernard Goldberg
100 People Who Are Screwing Up America (and Al Franken is #37) is a non-fiction book by conservative pundit Bernard Goldberg that was published in 2005
100 People Who Are Screwing Up America
100_People_Who_Are_Screwing_Up_America
bridge in KwaZulu-Natal. There are seven piers each with two 15" cast-iron screw piles, supporting eight 30 plat[clarification needed] Port Shepstone Register
List of heritage sites in KwaZulu-Natal
List_of_heritage_sites_in_KwaZulu-Natal
Topics referred to by the same term
Philadelphia, a 21st-century politician from Guyana Philadelphia Nina Robertson (1866–1951), Australian Red Cross administrator "Philadelphia Freedom"
Philadelphia_(disambiguation)
Surname list
Robertson (1879–1951), Canadian inventor of the Robertson screwdriver and screw Parker Robertson (born 2002), American football player Pat Robertson (1930–2023)
Robertson_(surname)
Second election of Donald Trump
than our so-called enemies", and added: "We protect them and then they screw us on trade." He also vowed to impose tariffs on trade partners; economists
2024 United States presidential election
2024_United_States_presidential_election
American football player (born 1983)
and was officially placed on injured reserve the next day. A total of 13 screws were inserted to stabilize his collarbone. Rodgers returned to practice
Aaron_Rodgers
World War II Liberty ship of the United States
SS Ben Robertson was a Liberty ship, Maritime Commission hull number 2432, built during World War II and named for Clemson University alumnus (Class of
SS_Ben_Robertson
First steamship driven by screw propeller
driven successfully by a screw propeller. Archimedes had considerable influence on ship development, encouraging the adoption of screw propulsion by the Royal
SS_Archimedes
Canadian actor, comedian, and writer
for CTV, from 2010 to 2011, entitled Hiccups. The series starred Nancy Robertson as Millie Upton, a children's author who begins seeing a life coach to
Brent_Butt
American multinational technology conglomerate
Kraus, Rachel (April 5, 2019). "How Amazon's $97 million Eero acquisition screwed employees and minted millionaires". Mashable. Archived from the original
Amazon_(company)
Flagship sports car by Ford (2005–2006 & 2017–2022)
Modular V8 engine is an all-aluminum alloy engine with an Eaton 2300 Lysholm screw-type supercharger. It features a forged rotating assembly housed in an aluminum
Ford_GT
1983 film by Douglas Trumbull
Walken, Natalie Wood (in her final film role), Louise Fletcher, and Cliff Robertson. It follows a research team's efforts to perfect a system that records
Brainstorm_(1983_film)
1960s British political scandal
characterised by Keeler as an unromantic relationship without expectations, a "screw of convenience", although she also states that Profumo hoped for a longer-term
Profumo_affair
realizes Dana is growing up. Also, Karen and Al get into a huge fight when Al screws up trying to wash Karen's blouse for a big date. In a parody of The People's
List_of_Step_by_Step_episodes
Large language model
Goldstein, Brett J. (April 28, 2026). "Opinion | Your Passwords Are Probably Screwed". The New York Times. ISSN 0362-4331. Retrieved May 17, 2026. Gillespie
Claude_Mythos
were subjected to rape, and 4 in 100 were subjected to gang rape. Nails, screws, plastic rubbish and other foreign bodies were forced into reproductive
History of wartime sexual violence
History_of_wartime_sexual_violence
American British writer (1843–1916)
works have been described as Impressionist. His novella The Turn of the Screw (1898) has garnered a reputation as the most analysed and ambiguous ghost
Henry_James
British tabloid newspaper (1843–2011)
news. Its somewhat prurient focus on sex scandals gained it the nickname Screws of the World. In its last decade it had a reputation for exposing celebrities'
News_of_the_World
American television sitcom (2007–2019)
2020. Retrieved February 15, 2013. "Barenaked Ladies—My Ex-Bandmate Is Screwing Me Out of 'Big Bang' Money". TMZ. September 11, 2015. Archived from the
The_Big_Bang_Theory
Final season of television series The Boys
comic book series of the same name created by Garth Ennis and Darick Robertson, was developed for television by Eric Kripke. The season was produced
The_Boys_season_5
Iron-hulled ship
removing her boilers and engines and adding two new masts. In 1895 GJ Robertson of Sydney bought her. In 1902 Howard Smith of Townsville bought her and
SS_City_of_Adelaide_(1863)
Greek mathematician and physicist (c. 287 – 212 BC)
mechanism. He is also credited with designing innovative machines, such as his screw pump, compound pulleys, and defensive war machines to protect his native
Archimedes
Mann Servante in The Angry Beavers episode "The Day the World Got Really Screwed Up"), dies at age 95. November 3: Quincy Jones, American record producer
2024_in_animation
Canadian conglomerate
2015-05-13. Retrieved 2021-08-13. Jackson, Emily (2018-09-24). "'We will not screw this up': Sobeys parent to buy beloved Farm Boy in $800M deal". Financial
Empire_Company
Film by Panos Cosmatos
September 10, 2019. Retrieved August 7, 2019. Rife, Katie (January 22, 2019). "Screw the Oscars, let's see who got nominated for a Fangoria Chainsaw Award".
Mandy_(2018_film)
American government official and television personality (born 1980)
democracy to a leftist demand, and expressed support for gerrymandering to "screw Democrats". He described progressives and Democrats as enemies of freedom
Pete_Hegseth
American right-wing to far-right populist political ideology
emotion. And the emotion is righteous indignation that the government is screwing 'us.'" Kimmel posits that Trump manifests "aggrieved entitlement", a "sense
Trumpism
Jewellery's pitch failed due to the dragons citing safety concerns of wearing the screw shaped necklace whilst playing sports and deemed the product unattractive
List of Dragons' Den (British TV programme) offers Series 1-10
List_of_Dragons'_Den_(British_TV_programme)_offers_Series_1-10
American industrial holding company
Inc. Astha Sterling Crane Plc (India) Procrane Sales Inc. Atlas Bolt & Screw Company LLC Big Red Rooster Flow Cable USA LLC Campbell Hausfield Cannon
Marmon_Group
AI-generated answers of Google Search results
August 2025. Rogers, Reece. "Google Admits Its AI Overviews Search Feature Screwed Up". Wired. ISSN 1059-1028. Retrieved 9 January 2025. Barrett, Brian. "'You
AI_Overviews
American law enforcement administrator (1895–1972)
threatened anyone who insinuated that he was homosexual. On May 2, 1969, Screw published the first reference in print to Hoover's sexuality, titled "Is
J._Edgar_Hoover
American actor (born 1942)
his father's injury, saying that his ankle would likely need a plate and screws and that filming could be altered slightly, with the crew needing to shoot
Harrison_Ford
issues we had, we let a lot of people down. There was very little we didn't screw up, honestly." The choice to include a premium subscription service in October
List of video games notable for negative reception
List_of_video_games_notable_for_negative_reception
American entertainment company (2003–2024)
website ScrewAttack. Death Battle became ScrewAttack's most popular show and the website began to shift its focus towards the show, and in 2019 ScrewAttack
Rooster_Teeth
Earth's orbit. During a spacewalk, her old-model EVA suit is hit by a stray screw from orbital debris, casting her hopelessly adrift with only 14 minutes
List of Love, Death & Robots episodes
List_of_Love,_Death_&_Robots_episodes
American actor (born 1945)
MovieWeb. Retrieved September 16, 2024. Whitbrook, James (May 25, 2021). "Screw Jesus, Beebo Will Be the Savior of Christmas This Year". Gizmodo. Retrieved
Ernie_Hudson
American drama television series (2022–2025)
flees to Mexico. Bosch investigates the murder of his colleague Jimmy Robertson and links it to a drug cartel, while Chandler deals with powerful political
Bosch:_Legacy
Video game character
Bowser has been also rated as the 4th-biggest douchebag in gaming history by ScrewAttack, who said that he wants to "take Mario down". IGN editor Craig Harris
Bowser
Season of television series
comic book series of the same name written by Garth Ennis and Darick Robertson, was developed for television by American writer and television producer
The_Boys_season_4
Measure of a civilization's evolution
Linkage Cam Clutch Four-bar linkage Piston Rack and pinion Pendulum Screw Archimedes' screw Propeller Spring Valve Wheel Block and tackle Flywheel Gear Potter's
Kardashev_scale
Vacuum tube used to display images
position of the deflection yoke, whose position may be maintained using set screws, a clamp and rubber wedges. 90° deflection angle CRTs may use "self-convergence"
Cathode_ray_tube
American actor (1938–2012)
Senseless (1998) - James Mafia! (1998) - George Jefferson (uncredited) Screwed (2000) - Chip Oswald Hanging in Hedo (2008) - Henry Hunter For The Love
Sherman_Hemsley
American media franchise
Based on the comic book series of the same name by Garth Ennis and Darick Robertson, originally published by DC Comics under its Wildstorm imprint before
The_Boys_(franchise)
Mid-1950s – mid-1980s electric piano
98, 121. Lenhoff & Robertson 2019, p. 99. Lenhoff & Robertson 2019, pp. 111–112. Lenhoff & Robertson 2019, p. 98. Lenhoff & Robertson 2019, pp. 101, 108
Wurlitzer_electronic_piano
Large bird in the corvid family
and were less likely to approach or interact with the shiny objects—metal screws, foil rings and aluminium foil—used in the experiments. However, magpies
Magpie
Slave trade between Africa and the West
trade. The naval historian Christopher Lloyd says the introduction of the screw steamship with heavier armament and lighter fuel consumption, more than
Atlantic_slave_trade
Episode list for an animated series
Povenmire Steve Callaghan November 15, 2001 (2001-11-15) 3ACX09 5.0 41 13 "Screwed the Pooch" Pete Michels Dave Collard & Ken Goin November 29, 2001 (2001-11-29)
List_of_Family_Guy_episodes
American television personality (born 1984)
immunity offered by the Legacy Advantage. She, Brad Culpepper, and "Troyzan" Robertson also allied, and all three of them managed to make it to the Final Tribal
Sarah_Lacina
screws." Another source is the fact that early baseball bats usually cracked lengthwise into two pieces; many were repaired using glue and two screws
Glossary_of_baseball_terms
Hungarian and American mathematician and physicist (1903–1957)
Purushottam; Karnick, Harish (2013). "On Translation Invariant Kernels and Screw Functions". p. 2. arXiv:1302.4343 [math.FA]. Alpay, Daniel; Levanony, David
John_von_Neumann
2005 film by Tim Burton
character similar to a recluse. Burton said, "In some ways, he's more screwed up than the kids." Warner Bros. also wanted Charlie to be a whiz kid, but
Charlie and the Chocolate Factory (film)
Charlie_and_the_Chocolate_Factory_(film)
Series of suicide bombings
probe". EconomyNext. 19 September 2023. Retrieved 22 September 2023. Robertson, Josh (16 November 2023). "Police hit 'obstacles' probing claimed links
2019 Sri Lanka Easter bombings
2019_Sri_Lanka_Easter_bombings
Winners of the three main U.S. awards
Performance by an Actress (Lead or Support) – Startime (Episode: "The Turn of the Screw") 1982: Outstanding Lead Actress in a Limited Series or Movie – A Woman
Triple_Crown_of_Acting
The following list contains songs produced, co-produced or remixed by hip-hop producer DJ Premier. 01. "Premier & The Guru" 02. "Jazz Music" 03. "Gotch
DJ Premier production discography
DJ_Premier_production_discography
lawyer, academic and judge, heart attack. Big Pokey, 48, American rapper (Screwed Up Click, "Sittin' Sidewayz"). Jim Brandenburg, 87, American college basketball
Deaths_in_June_2023
Tool used to create holes
first records of a water screw, or screw pump, date back to Hellenistic Egypt before the 3rd century BC. The Egyptian screw, used to lift water from the
Drill
1974 biographical television film
The Kansas City Massacre, also directed by Dan Curtis and starring Dale Robertson as Purvis. In this largely fictionalized film, agent Melvin Purvis is
Melvin_Purvis:_G-Man
Kevin (February 12, 2013). "That epic Wikipedia "Star Trek" edit is still screwing up Google". Daily Dot. Retrieved July 23, 2024. Morris, Kevin (January
List of edit wars on Wikipedia
List_of_edit_wars_on_Wikipedia
Machine tool used to remove material from a rotating workpiece
lathes have only one leadscrew that serves all carriage-moving purposes. For screw cutting, a half nut is engaged to be driven by the leadscrew's thread; and
Metal_lathe
help us that's great, because we need all the help we can get, and if we screw up and we don't do a good job, it's not somebody else's fault, it's our
History_of_Apple_Inc.
2021 attack to stop election certification
The Washington Post claiming the missing buttons were due to a "clerical screw-up" resulting from Pressley's swapping offices. Representative Jamaal Bowman
January 6 United States Capitol attack
January_6_United_States_Capitol_attack
Sean Robertson, while in the ship's cabin he and Sean argue over the procedure of how to correctly set sail. During a violent storm Admiral Robertson briefly
List of Friday the 13th characters
List_of_Friday_the_13th_characters
Electric keyboard instrument
covering the tuning pegs on the front. The panel can be removed with two thumb screws in order to tune the instrument with a rectangular case profile. A lockable
Clavinet
American mass murderer (1953–2017)
first at 9:59 pm on an unrelated matter but found the door to the hallway screwed shut by Paddock. At 10:05 pm, Paddock began firing hundreds of rounds in
Stephen_Paddock
American television series (2015–2019)
Archived from the original on August 29, 2018. Retrieved August 29, 2018. Screws, Nic (August 26, 2015). "Rami Malek, Star of Mr. Robot, Is Ready to Start
Mr._Robot
American journalist (born 1948)
Larkin both came from "blue collar Irish stock" and shared an "in-your-face, screw-you" attitude. With Larkin as "the business brains of the operation" and
Michael_Lacey_(editor)
travel, tourism, insurance
ROBERTSON SCREW
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travel, tourism, insurance