| SI Metric Port Size, Millimeters | Inch Equiv. Diameter | Nearest* Smaller U.S. Port | Nearest* Largest U.S. Port | Suggested O-Ring Seal** |
| M5 × 0,8 | 0.1968 | 5,00 × 1,50 | ||
| M8 × 1,0 | 0.3150 | 7,00 × 1,50 | ||
| M10 × 1,0 | 0.3937 | 9,00 × 1,50 | ||
| M12 × 1,5 | 0.4724 | 7/16-20 | 1/2-20 | 11,00 × 2,00 |
Full Answer
How to determine pipe thread type and pipe size?
- Identify if the thread is parallel or tapered
- Determine the thread pitch in mm using a thread gauge or calipers (typically 1.0, 1.5, or 2.0, but other sizes do exist)
- Determine the thread O.D (male thread) or I.D (female thread) using calipers.
What are the metric thread sizes?
The following table chart defines standard metric external thread size M1.6 to M18 per. ANSI/ASME B1.13M-1995. These thread sizes and classes represent bolts and screws, as well, as other standard external threads. Do not use these values for standard metric internal thread design. All units in mm. These are the M Profile limiting Dimensionings.
What are metric thread classes?
thread classes for bolts sized in metric units. See also: thread classes for bolts sized in inches Tolerance class is designated by tolerance grades and tolerance positions. The tolerance grade is described by a numeral, from 3 to 9 for external threads and 4 to 8 for internal threads. The higher the number the greater the tolerance.
What size is pipe thread?
- *Ream the hole before tapping with a reamer having a taper of 3/4 inch per foot. ...
- E = Pitch diameter at hand-tight plane. ...
- **' = Truncation from point of thread triangle to flat (not shown in diagram). ...
Is there a metric pipe thread?
Pipe Threads. These metric pipe thread sizes have been adopted by the ISO (International Standards Organization), and are primarily intended for pipes or tubes for screwing together or into ISO pipe ports on valves, cylinders, pumps, and other components.
How do you identify metric pipe threads?
For Metric parallel threads, taking a caliper reading of the threads outer diameter in millimetres (mm) will give a reading of the exact thread size but not the thread pitch. For example, a caliper reading of 12.03mm indicates it is very likely a 12mm thread.
What are standard metric thread sizes?
Metric clearance and tapping drill hole sizes.SizeClearance Hole mmTapping Drill (std Pitch)M10118.5 mmM121410.25 mmM161814 mmM202217.5 mm5 more rows•Jun 19, 2020
Is 3/4 BSP the same as 20mm?
For threads and PVC Pipe: half inch refers to 15mm, three quarter inch refers to 20mm, one inch refers to 25mm, one and a quarter inch refers to 32mm, one and a half inch refers to 40mm, two inch refers to 50mm.
How do I know if my threads are metric or Imperial?
Metric threads are measured by their pitch. That is the distance from the crest of one thread to the crest of the next measured in millimetres. The pitch of a metric thread can be checked by direct measurement with a metric rule. Imperial threads have their pitch measured indirectly as a given number of teeth per inch.
What is the metric equivalent to 1/4 NPT?
Inch (SAE) To Metric Conversioninch1000th / inchmm7/320.2195.55615/640.2345.9531/40.2506.35017/640.2666.74760 more rows
What are the different types of metric threads?
BSPP (BSP, parallel) BSPT (BSP, tapered) metric parallel. metric tapered.
How do you specify metric threads?
Designation. A metric ISO screw thread is designated by the letter M followed by the value of the nominal diameter D (the maximum thread diameter) and the pitch P, both expressed in millimetres and separated by the multiplication sign, × (e.g., M8×1.25).
Are M6 and 1/4 the same?
A normal M6 screw is a rattly fit in a 1/4 BSF full nut.
Is 1/2 inch BSP the same as 15mm?
Whilst most 15mm compression fittings are 1/2" bsp, (some earlier ones had finer threads) the same cannot be said for 10mm and 8mm.
Is metric and BSP the same?
Although BSP is a foreign thread, it isn't actually metric. This is why it comes in imperial sizes: 1/8, 1/4, 1/2, 3/4, and so on. BSP parallel threads commonly seal via a 30° chamfer on the male thread to a 30° recessed cone inside the female thread (swivel only).
Are BSP and BSPT interchangeable?
BSPT & BSPP Male and Female Fittings British Standard Pipe threads are similar in function to NPT threads, but are generally not interchangeable. BSPT male threads seal against threads of fixed BSPT female.
What is the best tool to measure the diameter of a thread?
Caliper –. A caliper is a useful tool that measures the outside diameter of a male thread and inside diameter of a female thread. Using a caliper will give you the most accurate and precise measurements, but a straight steel ruler is a good alternative.
How to tell if a thread is male or female?
First, you’ll need to identify whether the thread type is male or female. Take a look at where the threads are located. If they’re on the outside of the thread, it’s a male thread. If they’re on the inside of the thread, it’s a female thread.
How to tell if a thread is tapered or parallel?
Next, determine if the thread is tapered or parallel. Tapered threads become narrower as they extend outward while parallel threads remain the same diameter. Sometimes this characteristic can be determined through visual inspection, but if not a caliper can come in handy. Use the caliper to measure the first, fourth, and final full thread. If the measurements are all the same, then it’s parallel. If the measurements decrease in size, then it’s tapered.
Why are G threads not compatible with NPT?
For example, G threads are not compatible NPT threads because of their differing angles, shapes, and thread pitches (threads per inch). We have compiled a simple step-by-step guide to help you identify your thread type. In addition, we’ll cover some of the most common port thread types including NPT/NPTF, BSPP (also known as G), BSPT, PT, ...
What is pitch gauge?
A pitch gauge measures the threads per inch. For metric threads, this tool measures the distance between the threads. If you’re looking to buy a thread pitch gauge, Grainger has a pretty good selection.
What is SAE thread?
SAE - Society of Automotive Engineers - straight threads are able to seal because of the 90-durometer Buna-N “O” Ring . This is a highly reliable and reusable thread type. While some thread types require the threads of the male and female end to crush together to form a seal, the O-Ring on this thread type prevents that.
Is PT thread the same as BSPT thread?
PT thread type is identical and interchangeable with BSPT thread type. However, since the male PT thread does not have a 30-degree flare, it will not mate with the BSPP female swivel with conical seat. Also, we recommended using thread sealant with PT threads to ensure a leak-free seal.
What is thread pitch?
Metric fasteners are specified with a thread pitch, instead of a thread count. The thread pitch is the distance between threads expressed in millimeters. In general, smaller fasteners have finer threads, so they have a lower thread pitch.
What is the M series thread?
They were one of the first international standards agreed upon when the International Organization for Standardization (ISO) was set up in 1947. The design principles of ISO general-purpose metric screw threads ("M" series threads) are defined in international standard ISO 68-1. Each thread is characterized by its major diameter and its pitch.
Why use superfine pitch threads?
This is because extra fine threads are more resistant to coming loose from vibrations.
What does TPI mean in fasteners?
Thread Count (TPI) TPI stands for Threads Per Inch, which means the total number of threads per inch measured along the length of a fastener. TPI is used only with American fasteners. Metric Fasteners use a thread Pitch. In general, smaller fasteners have finer threads, so the thread count is higher.
What pressure is standard for a water pipe fitting?
Connect these fittings to standard-wall plastic pipe for use in low- to medium-pressure applications up to 810 psi. They are the industry standard for residential and commercial plumbing and water supply applications.
What is a barbed end fitting made of?
Made of plastic, these fittings are lighter in weight than metal barbed fittings, yet have the chemical and corrosion resistance to stand up to harsh substances. Slide the barbed end into plastic or rubber hose and secure with a clamp.
What is a female connector?
The female connector screws directly onto the hose without the need for a separate adapter. When assembled, the fitting compresses against the hose, forming a strong seal. Also known as reusable fittings, they can be unscrewed from the hose end and used on a new hose.
What is an instant fitting?
Also known as instant fittings, they connect to tubing with a push, and an internal gripping ring and O-ring hold the tubing tight. Use in applications up to 150 psi.
What is a tube adapter?
A tube adapter sits flush against the flat face of the fitting so you can slide the steel tubing and fitting sideways to disconnect in cramped spaces. Also known as zero-clearance fittings.
What pressure is used for a swagelok?
Use these fittings at pressures up to 9, 700 psi. Also known as instrumentation fittings, they are made to tight tolerances for use in high-precision applications. They are compatible with Swagelok®, Let- Lok, and Parker A-Lok fittings.
What is a 3A aseptic fitting?
Also known as aseptic fittings, they’re 3-A certified for sanitary standards because their smooth inner finish makes it easy to remove residue.