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Description
G TAPS BSPF BRITISH STANDARD PIPE PARALLELSutton Tools manufactures a comprehensive range of G (BSPF British Standard Pipe Parallel) thread taps designed for both light trade maintenance and high performance industrial production. These 55 parallel pipe thread taps are widely used for gas, plumbing, and fluid power fittings. BREAKDOWN OF 1 8 X 28 1. The "1 8" Nominal Size In pipe threading, 1 8 inch does not measure the physical outside diameter of the metal thread. It historically refers to
Sutton Tools manufactures a comprehensive range of G (BSPF - British Standard Pipe Parallel) thread taps designed for both light trade maintenance and high-performance industrial production. These 55° parallel pipe thread taps are widely used for gas, plumbing, and fluid-power fittings.
BREAKDOWN OF 1/8 X 28
1. The "1/8" Nominal Size
In pipe threading, 1/8 inch does not measure the physical outside diameter of the metal thread. It historically refers to the approximate inside diameter (ID) of the steel pipe. The actual physical outside diameter (OD) of a 1/8 BSPF thread is much larger, measuring 0.383 inches 9.73mm.
2. The "28" Pitch
This number defines the thread density. There are exactly 28 crests per axial inch of thread length. To find the distance from one thread point to the next (the pitch), you divide 1 inch by 28.
Pitch= 1 inch Divided by 28 = 0.0357 inches 0.907mm
Pitch= 1 inch Divided by 28 = 0.0357 inches 0.907mm
3. The "BSPF" Profile
- Parallel Threads: Unlike BSPT (tapered) threads which seal by binding together, BSPF threads maintain a constant diameter along their entire length. They require a sealing washer, gasket, or O-ring at the base of the joint to prevent leaks.
- 55° Whitworth Form: The thread profile features a \(55^{\circ }\) V-shape angle with rounded crests (tops) and roots (bottoms), unique to British standards
1. Taper Tap (The Starter)
- Design: Features a long, gradual chamfer at the tip covering the first 7 to 10 threads.
- Purpose: Used to start the threading process. The long taper allows the tool to easily enter the drilled hole, align straight, and gently begin cutting the first shallow groove.
- Limitation: It cannot cut a complete thread to the bottom of a hole because the tip is narrow and lacks full-sized cutting teeth.
2. Intermediate / Plug Tap (The Follower)
- Design: Features a shorter chamfer at the tip covering the first 3 to 5 threads.
- Purpose: Used after the Taper tap to cut the threads deeper and closer to full size. In a "through-hole" (a hole drilled all the way through the metal), an Intermediate tap is often the final tap needed to finish the job.
- Note on Terminology: In the UK, Australia, and BSW standards, this is widely called an Intermediate tap. In the US, it is commonly referred to as a Plug tap.
3. Bottoming Tap (The Finisher)
Design: Features a very short chamfer at the tip covering only 1 to 2 threads. The rest of the tap features full-sized, sharp cutting teeth.
- Purpose: Used exclusively to finish "blind holes" (holes that stop mid-way through the metal and do not go all the way through). It allows you to cut full, usable threads right down to the very bottom floor of the hole.
- Limitation: Never use this tap to start a hole. Because it has no guiding taper, it will wobble, cross-thread, or immediately snap under the sudden cutting pressure.
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4.4 ★★★★★
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Product Reviews
★★★★★ 5
Excellent product for dry mouth
Scent Name: Berry, Size: 100 Count
If you are having trouble with dry mouth, especially while sleeping, this is definitely the product for you. I have severe dry mouth and have tried multiple things including hard candy (yes, I know not very smart) as well as different biotin products, the mouthwash, the spray and the gel, which all do work, but do not last for very long. These stay in place open the corner of your mouth, last for hours and truly work. I highly recommend it if you are having a dry mouth issue
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Reviewed in the United States on February 5, 2026
★★★★★ 5
Works great
Scent Name: Berry, Size: 100 Count
I have to use these for about 1/2 a year. I keep bronchitis and sinusitis from about Oct. to April every since I was a child. When I am suffering with these I can't breath through my nose, epically at night while sleeping and would wake up several times a night with dry mouth so bad ir was literally painful. My mom turned me on to these because she was using the with her CPAP. I sometimes have a bit of difficulty getting them to stay put but overall they are great. I have tried the OG, cinnamon, and berry. The OG have no real taste, but you wake up with a sweet taste in your mouth. I tried the cinnamon because I love cinnamon and didn't listen to the reviews stating how strong the flavor is, big regret, it's like putting two or three fireballs in your mouth, won't be making that mistake again. The berry ones are actually best in my opinion. They have a light berry flavor that isn't overpowering, isn't quite as sweet as the OG. Whichever one you choose you won't wake up in pain. I do suggest using only one at first as opposed to the two they recommend, unless you like waking up with your head on a water logged pillow. One generally gets me through the night unless my congestion is super bad, then I will sometimes have to use a 2nd one about 1/2 way through my night when I wake up for the bathroom and realize it's already completely dissolved.
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Reviewed in the United States on September 21, 2025
★★★★★ 5
I Loved this book!!
Format: Hardcover
This was an excellent book. I used it for a Career Counseling course in Graduate School. I will use this book throughout the rest of my schooling. I will be able to use it as a study guide for my CPCE and NCE exam, as well as use it as a reference in my career as a school counselor. They have many useful appendices in the back of the book.
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Reviewed in the United States on November 18, 2017
★★★★★ 5
GREAT!
Format: Hardcover
I think this book did a great job of explaining the different models and theories of counseling psychology. It went in depth on many of the concepts and made for great learning.
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Reviewed in the United States on July 10, 2016
★★★★★ 5
Career Counseling
Format: Hardcover
An excellent desk reference
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Reviewed in the United States on December 18, 2023