What does SL mean on screwdriver?

Slotted. Original and the most commonly used traditional screw type – it has a single slot in the fastener head.

What do screwdriver numbers mean?

While screw size is shrouded in mystery, there are four basic sizes of Phillips screwdriver — from #0 to #4 — #0 being the smallest. The most common sizes are #2 and #1, #2 for standard screw sizes, #1 for “miniature”. Then there are the jeweler-size screws.

How do I know what size screwdriver I need?

If you have the package in which your screws came in, look at the package for the size of screws you bought. You want to look at how long and thick the screw head slot is. You can then find a screwdriver that’s the same size.

What are the three types of screwdrivers?

Types of Screwdrivers

  • Phillips Screwdriver. Also known as cross-head screwdrivers, Phillips screwdrivers are one of the most common types. …
  • Torx or Star Screwdriver. …
  • Insulated Screwdrivers. …
  • Torque Screwdrivers. …
  • Flathead Screwdriver. …
  • Tri-Wing Screwdriver. …
  • Pozidriv Screwdriver. …
  • Hex Screwdriver.

What are Phillips screws?

Noun. 1. Phillips screw – a screw with a special head having crossed slots. screw – a fastener with a tapered threaded shank and a slotted head. trademark – a formally registered symbol identifying the manufacturer or distributor of a product.

IT IS INTERESTING:  How much is my Chevy Bolt worth?

What is a number 3 screwdriver?

The #3 Phillips head works on screws with the numbers 10, 12, 14, and 16, and the #4 Phillips head corresponds with screws numbered 18, 20, and 24. The numbering system, while a bit hard to keep track of, is one way to determine which screwdriver works with which screw.

What are screw sizes?

Screw sizes are designated by a number that indicates the diameter and the length of the screw in inches (Table 10-2). The smallest diameter screw is 0, and the largest commonly available is 24. For bench work, the most useful sizes are 4 through 12. Of those sizes, 6, 8, and 10 are probably used more than any others.

What are the different types of screw heads?

The two basic screw head types, countersunk and non-countersunk, include various unique designs.

The different screw drive types include:

  • Slotted.
  • Phillips.
  • Phillips tamper-resistant.
  • Combination.
  • Hex external.
  • Hex internal.
  • Hex tamper-resistant.
  • Square recess.

What is the most common screw size?

The most common size is #8 (approximately 5/32-inch in diameter), but the appropriate size of screw will depend on your individual project.

Why is it called Phillips screwdriver?

Henry Frank Phillips (June 4, 1889 – April 13, 1958) was an American businessman from Portland, Oregon. The Phillips-head (“crosshead”) screw and screwdriver are named after him. … Thompson who, in 1932, patented (#1,908,080) a recessed cruciform screw and in 1933, a screwdriver for it.

What are star screwdrivers called?

Called Torx, 6 point, and star, Torx are a 6 pointed star shaped screwdriver. Originally designed in the 60’s to outperform hex screws, Torx is a trademarked name for a screwdriver that fits Torx screws, commonly seen in sizes Torx 6 to Torx 40 (or T6 to T40).

IT IS INTERESTING:  Can you use normal screws on cement board?

What are flathead screwdrivers called?

The tool used to drive a slotted screw head is called a standard, common blade, flat-blade, slot-head, straight, flat, flat-tip, or “flat-head” screwdriver. … Though there are many names, the original device from 1908 was known as a “flat-head screw turner”.

What is flathead screwdriver?

A flat-head screwdriver is a screwdriver with a wedge-shaped flat tip, used to tighten or loosen screws that have a straight, linear notch in their heads. This is arguably the most common tool on the planet—the ubiquitous flat-head screwdriver. Every junk drawer has one or two in it.

What is Panhead screw?

Pan head screws are a common head type of non-countersunk screw head used in wood screws, self-tapping screws, self-drilling screws, and machine screws. They have wide heads, a flat bearing surface, high vertical, chamfered, or curved sides, and a flat or slightly domed top surface with a recessed socket.

What is a Robertson screw?

A Robertson screw, also known as a square screw or Scrulox, is a type of screw which has a square-shaped socket in the screw head and a square protrusion on the tool. Both the tool and the socket have a slight taper. … The Robertson screw is specified as ANSI Type III Square Center.