What does AF mean on a wrench?
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.
What is the difference between AF and imperial spanners?
Very rarely af spanners are marked in decimal instead of fractional sizes for example . 50 instead of 1/2 or . 75 instead of 3/4 inch etc. Imperial AF spanners are normally used on nuts and bolts threaded UNC or UNF (Unified Coarse or Unified Fine) and use a thread angle of 60 degrees.
What are AF spanner sizes?
Imperial and Metric Spanner Sizes
| BOLT DIAMETER (INCHES) | AF SPANNER SIZE (INCHES) | SPANNER SIZE (MM) |
|---|---|---|
| 1/4 INCH | 7/16 INCH | 11.11 MM |
| 5/16 INCH | 1/2 INCH | 12.7 MM |
| 3/8 INCH | 9/16 INCH | 14.29 MM |
| 7/16 INCH | 5/8 INCH | 15.88 MM |
What does SAE stand for in spanners?
Society of Automotive Engineers
SAE stands for Society of Automotive Engineers. This form of measurement was used primarily on cars made in the USA. This is why more often than not if you’re in the United States, you’re most likely finding wrenches and sockets in SAE sizings.
What does AF mean in measurement?
Widely-used system of measuring nut sizes. Nuts and bolt-heads are measured by the distance between the jaws, or flats, of the spanner needed to turn them. This is an alternative method to that of measuring the thread size of the bolt. It is usually quoted as, for example, 7/8″ A/F.
What are Whitworth sockets?
British Standard Whitworth (BSW) is an imperial-unit-based screw thread standard, devised and specified by Joseph Whitworth in 1841 and later adopted as a British Standard. It was the world’s first national screw thread standard, and is the basis for many other standards, such as BSF, BSP, BSCon, and BSCopper.
What is 12mm in AF?
Spanner size chart
| Inches | Millimetres | Spanner |
|---|---|---|
| 0.445 | 3/16 Wworth; 1/4 | |
| 0.472 | 12mm | 12mm |
| 0.500 | 1/2 AF | |
| 0.512 | 13mm |
Should I buy SAE or metric wrenches?
You should buy Metric Wrenches because they are best classed as the universal unit of measurement and are easily understood everywhere by any tradesmen, contractor, professional, or DIYer, however, if you live in the USA then SAE Wrenches are better suited for your equipment because Standard American is commonly used …
What is an A F nut?
How do you measure AF nut?
Stretch the tape measure across the nut’s diameter to the flat-side directly across from the one your pulling from. If the nut is metric, count the number of lines on the tape measure to find the measurement. If you count 9 lines, the size is a 9-mm (millimeter) nut.
Does M8 mean 8mm?
So an M8 bolt would have a shaft diameter that’s slightly under 8mm which means that the bolt should fit through an 8mm hole. But it’s common practice to drill clearance holes that are slightly larger to allow for misalignment.
What are the different types of wrenches?
Wrench Types 1 Adjustable Wrench 2 Combination Wrench 3 Open-End Wrench 4 Ratchet Wrench 5 Short-Body or Stubby Wrench 6 Crowfoot Wrench 7 Basin Wrench 8 Pipe Wrench 9 Hex Key/Allen Wrench 10 Star-Head Key/Torx Key 11 Strap Wrench 12 Wrench Sets and Mechanics Tool Sets More
What can you use a Fatat wrench for?
Common uses include, but are not limited to, instillation of scope rings and base screws, action screws and trigger guard screws. With proper care and use, the F.A.T. Wrench will provide you with a lifetime of reliable service.
How do I choose the right wrench for my project?
Choosing the right wrench for a project involves more than just matching sizes. Use the right style of wrench to make your project easier. Wrenches perform the same function as ratchets and sockets — tightening and loosening fasteners — but there are differences and situations that call for one over the other.
How to use a ratchet wrench?
Ratchet Wrench 1 Tightens/loosens nuts and bolts 2 Metric and standard sizes 3 Ratchet action on one end moves freely in one direction and engages the fastener in the other direction to tighten or loosen nuts and bolts without removing the tool 4 Some have pivoting ratchet ends for use in tight spaces