What does AF on a wrench mean?

Width across flats is the distance between two parallel surfaces on the head of a screw or bolt, or a nut, mostly for torque transmission by positive locking. The term width across flats (AF) is used for the following forms: 2-socket = round material with two surfaces.

1. What does AF thread mean?
2. Are Whitworth and AF spanners the same?
3. What does AF stand for Imperial?
4. What are AF measurements?
5. Is AF thread the same as UNF?
6. What are af sockets?
7. What does AF stand for tools?
8. What is the difference between AF and Imperial?
9. What is hex size?

What does AF thread mean?

3 Answers. Paul Childs. Across flats or sometimes American fine.

Are Whitworth and AF spanners the same?

AF was introduced much later and refers to Across Flats and was related to UNC(universal national coarse) and UNF(universal national fine) threads in the USA A 1/2 inch Whitworth socket is for a nut that fits on a 1/2 inch diameter thread, and is usually 1.5 times the diameter of the screwed rod across the flats of the ...

What does AF stand for Imperial?

Convert,compare all Imperial tool,nut,bolt and spanner sizes to metric. Kevin C Bacon. (Baconsdozen Imperial tools). Commonly used Whitworth or B.S.F to SAE / A.F (inches across flats) sizes and conversions to metric and decimal inch dimensions.

What are AF measurements?

For water that is in motion, cubic feet per second (cfs) is the unit of measure. For water that is stored or impounded, the acre-foot (af) is how water is measured. Cubic feet per second (cfs): * 1 cubic foot = 7.4805 gallons. * 1 cubic foot per second = 7.4805 gallons flowing by a particular point in 1 second.

Is AF thread the same as UNF?

AF isn't a thread type, it's "Across Flats" and is just a way of measuring the size of a bolt head, so UNF and UNC bolts have head sizes that are specified by measuring them Across the Flats instead of relating them to the thread size as with Whitworth and BA.

What are af sockets?

AF can stand for American Fractional; another term used for imperial. However, when applied to metric sockets, AF means 'Across Flats'. This means a 19mm AF socket will fit a nut or bolt head that measures 19mm across its flats.

What does AF stand for tools?

Width across flats is the distance between two parallel surfaces on the head of a screw or bolt, or a nut, mostly for torque transmission by positive locking. The term width across flats (AF) is used for the following forms: 2-socket = round material with two surfaces. 4-socket = profile square section.

What is the difference between AF and Imperial?

Imperial are another range of sizes completely;tend to be found on older UK vehicles. Most people take imperial to be inch sizes which are AF. If you're thinking of Whitworth then you'll struggle to get a whit set for cheap money these days. Most AF sizes are useful for when the metric nut is rounded etc.

What is hex size?

Hex nut size refers to its nominal thread diameter. Typically, sizes range from 1/4" to about 2 1/2". Size is specified in inches, usually fractional rather than decimal. Table 1 lists width across flats and across corners, and thickness.