What are Whitworth sizes?

BSW (British Standard Whitworth)

Diameter Inches	T P I	Tapping Drill Size
1/16	60	Number Drill 56 (1.2 mm)
9/16	12	12.1 mm (0.4764 inch)
5/8	11	13.5 mm (0.5315 inch)
11/16	11	15 mm (0.5906 inch)

How many threads per inch is Whitworth?

British Standard Brass (for which there is no British Standard) is based upon the Whitworth thread form with all diameters having 26 threads per inch (tpi). It was used on general brass work, gas fittings and brass tubing.

Is BSW the same as Whitworth?

If you are struggling to find either a BSW thread (British Standard Whitworth) or a UNC thread (Unified National Coarse), it is useful to know that in almost all cases the two threads are interchangeable in practical terms.

Is BSF the same as Whitworth?

British Standard Fine (BSF) is a screw thread form, as a fine-pitch alternative to British Standard Whitworth (BSW) thread. It was used for steel bolts and nuts on much British machinery, including cars, prior to adoption of Unified, and later Metric, standards.

How do you convert Whitworth to mm?

Commonly used Whitworth/BSF thread diameters and the mm or imperial (inch) size of the wrench opening (across flats) to fit nut or head. Whitworth (inch)….

Bolt dia.	AF spanner size inches	Spanner size 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
	11/16 inch	17.46 mm

Is G thread tapered?

The NPT thread is slightly tapered, while the G connection is straight.

What is G thread and R thread?

BSP distinguishes between two types of threads. These are parallel threads (BSPP), which have a constant diameter, which are known a G threads, and taper threads (BSPT), whose diameter increases or decreases along the length of the thread, known as R threads.

Is Whitworth the same as SAE?

The Whitworth threads are referred to as BSW (British Standard Whitworth). Now enter the British Standard Fine fasteners. These bolts have a fine thread, with a different thread count from an American National Fine (also known as SAE).

How do you identify Whitworth threads?

Thread form The form of a Whitworth thread is based on a fundamental triangle with an angle of 55° at each peak and valley. The sides are at a flank angle of Θ = 27.5° perpendicular to the axis. Thus, if the thread pitch is p, the height of the fundamental triangle is H = p/(2tanΘ) = 0.96049106p.

Are BSP and Whitworth the same?

BSP threads have rounded valleys and troughs with a 55 degree pitch (this is known as Whitworth type). There are two types of BSP threads; Tapered (BSPT) and parallel (BSPP). The vast majority of BSP threads for water fittings are parallel.

What is a 1/4 g thread?

Whitworth Parallel Pipe Thread DIN ISO 228 (DIN 259) BSPP (British Standard Pipe Parallel)

Nominal Diameter	Major Diameter Inch	TPI
G 1/4″	0.518	19
G 3/8″	0.656	19
G 1/2″	0.825	14
G 5/8″	0.902	14

Is BSP the same as Whitworth?

Will AF spanners fit Whitworth?

(approx 13.34mm),this occurs throught the sizes so a set of whitworth sockets or spanners will fit an equal number of BSF nuts and bolts….

Bolt dia.	AF spanner size inches	Spanner size 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
	11/16 inch	17.46 mm

What is the difference between Whitworth and Imperial?

Whitworth is an imperial (inch based) measurement thread using a 55 degree thread form. Unified Thread Standard is an inch based measurement thread using a 60 degree thread form. Pitch is measured in threads per inch. Used in the US.

What is G thread type?

British parallel threads are often referred to as “G” threads, the two types of thread are the same parallel straight, the threads are measured in threads per inch. Therefore, BSPP is the same as G. BSPP fittings and adapters.

What is G on thread gauge?

External threads (bolts): small “e” = large allowance, small “h” =no allowance, small “g” = small allowance.

What does G mean in thread?

These are parallel threads (BSPP), which have a constant diameter, which are known a G threads, and taper threads (BSPT), whose diameter increases or decreases along the length of the thread, known as R threads.

What does AF stand for in spanners?

The term width across flats (AF) is used for the following forms: 2-socket = round material with two surfaces. 4-socket = profile square section. 6-socket, 8-square = regular polygons.

What is the difference between Whitworth 60° and TPI 60°?

It uses a thread angle of 60° compared to the Whitworth 55° and very fine thread pitches. TPI stands for Threads Per Inch, Which means the total number of threads per inch measured along the length of a fastener.

How many turns per inch is a Whitworth microscope?

17⁄32 in by 26 turns-per-inch Whitworth, an artifact of this having been developed by a German company specializing in microscopes and thus equipped with tooling capable of handling threads in inches and in Whitworth.

Is the Whitworth British thread standard still in use?

The Whitworth British Thread standard is obsolete and not in use as a standard for new products. The information contained herein is for reference only in the application of spare and replace parts on existing products and equipment.

What is the difference between Hotchkiss tools and Whitworth tools?

The Hotchkiss machine tools were of metric thread but metric spanners were not readily available in Britain at the time, so fasteners were made with metric thread but Whitworth heads. In the 2011 movie Cars 2 by Disney / Pixar, the vital clue to the discovery of the villain, Sir Miles Axlerod, is that he uses Whitworth bolts.