Allen screwAllen screw /ˈælən skruː/ noun [countable] 
a type of screw with a hole that has six sides
a type of screw with a hole that has six sides- harridan
- Harrier jump jet
- Harrisburg
- Harris, Frank
- Harrison, Benjamin
- Harrison, George
- Harrison, William Henry
- Harris poll
- Harris, Richard
- Harris Tweed
- Harrods
- Harrow
- harrow
- harrowing
- harrumph
- harry
- Harryhausen, Ray
- Harry, Prince
- harsh
- harshly
- harshness
- hart
- Hartford
- Hart, Lorenz Milton
- Hartnell, Sir Norman