3/8 Thread Dimensions
3/8 thread dimensions
What size is 3/8 gas thread?
| BSP Size | Also Known As | Actual Diameter (Imperial) |
|---|---|---|
| 1/4" | 1/2 inch | |
| 3/8" | 6/10 inch | |
| 1/2" | 15 BSP | 3/4 inch |
| 5/8" | 18 BSP |
What thread is 3/8 SAE?
| MALE THREAD OD & PITCH | DASH SIZE | MALE THREAD OD |
|---|---|---|
| inch – TPI | inch | |
| 5/16 – 24 | -05 | 0.31 |
| 3/8 – 24 | -06 | 0.38 |
| 7/16 – 20 | -07 | 0.44 |
What is the major diameter of a 3/8 bolt?
| Screw Size | Class Thread | Major Diameter |
|---|---|---|
| 3/8-16 | 3A | 0.3750 |
| 3/8-24 | 2A | 0.3750 |
| 3/8-24 | 3A | 0.3750 |
| 7/16-14 | 2A | 0.4375 |
Are NPT and BSP the same?
NPT and BSP threads are not interchangeable due to the differences in thread forms. NPT threads are pointed in the peaks and valleys, where BSPs are rounded. Most notably, the NPT thread angle is 60 degrees versus the BSP 55-degree angle.
What does BSP mean in threads?
BSP thread form stands for British Standard Pipe and is common in Australia and the commonwealth countries. It is based on trade size rather than actual diameter which can lead to some confusion when measuring ports. There are two types of BSP threads; - BSPP - Female & male thread are both (also known as G)
Is NPT measured by ID or OD?
How are they measured? NPT fittings are listed by the "standard" inner diameter (I.D.) of the fitting. (We put "standard" in quotes because the I.D. of the fitting will vary, depending on the manufacturer.) The outer diameter (O.D.) of the threads is usually about 1/4 (0.250) in.
How do I determine thread size?
Use a caliper to measure the nominal male or female thread press to crest diameter on the first
What is major diameter of thread?
Major Diameter: The largest diameter of the thread of the screw or nut. The term “major diameter” replaces the term “outside diameter” as applied to the thread of a screw and also the term “full diameter” as applied to the thread of a nut. Minor Diameter: The smallest diameter of the thread of the screw or nut.
What pitch is a 3/8 16 thread?
| Coarse Thread Series – UNC | Fine Thread Series – UNF | |
|---|---|---|
| Nominal Size and Threads Per In. | Basic Pitch Dia. | Basic Pitch Dia. |
| 3⁄8 – 16 | 0.3344 | 0.3479 |
| 7⁄16 – 14 | 0.3911 | 0.405 |
| 1⁄2 – 13 | 0.45 | 0.4675 |
What is nominal thread size?
Thread sizes are given in nominal sizes, not in the actual measurement. The exact measurement is slightly below the named or nominal size. For example, a 6mm bolt may measure 5.8mm or 5.9mm, but it is called 6mm bolt. It is also common to use “M” before the bolt size, such as M6 for a 6mm bolt.
What is nominal thread diameter?
The size most commonly associated with screw threads is the nominal diameter. Nominal diameter is a more of a label than a size. For example, a bolt and nut may be described as being ½” diameter. But neither the external threads of the bolt nor the internal threads of the nut are exactly .
How do I know if my thread is NPT or BSP?
The way to tell the difference between the two is the flank angle. The flank angle for NPT is 60° compared to the BSP tapered which is 55° (this can be verified with a thread gauge). BSP threads are measured in imperial measurements such as 1/8, 1/4, 1/2, 3/4 etc.
How do I identify a pipe thread?
Thread dimensions are based on the ID of the pipe. Use a caliper, measuring tape, or ruler to measure the thread diameter of a male thread or female thread. Measure the inner diameter (ID) of the female thread and the outer diameter (OD) of the male thread. This number will help determine the thread dimension.
Is UNF the same as NPT?
UNF is Unified Fine thread, the successor to the obsolete National Fine (NF) thread. NPT National pipe thread is used (in the U.S.) for plumbing of water and gas pipes, and threaded electrical conduit. NPT is defined by ANSI/ASME standard B1. 20.1, American National Standard Taper Pipe Thread.
Is G thread same as NPT?
Eyeballing the Difference Between NPT and G Connections. When placed side by side, the difference between the two connection types is clear. The NPT thread is slightly tapered, while the G connection is straight. Another obvious visual: The G connector ends with a small protrusion (nipple), used to center the gasket.
What's NPT stand for?
NPT (or National Pipe Taper) is a U.S. standard for tapered threads widely used on pipes and fittings for over 100 years. NPT connections rely on thread deformation- a metal to metal sealing design where the threads of the connectors themselves form together.
Is BSP and Whitworth the same?
Whitworth (1803-1887), also known as British Standard Pipe (BSP) or British Standard Pipe Taper (BSPT), were originally thread forms for pipe fittings. They are still used for pipe installations in Europe today. They are therefore also known as pipe threads.
What is the OD of 3/8 NPT?
| Nominal Pipe Size | Outside Diameter of Pipe | Wrench Makeup Length for Internal Thread |
|---|---|---|
| 1/4 | 0.540 | 0.1667 |
| 3/8 | 0.675 | 0.1667 |
| 1/2 | 0.840 | 0.2143 |
| 3/4 | 1.050 | 0.2143 |
How do I know what size NPT I have?
To determine the NPT size, with a caliper, measure the diameter of the 2nd or 3rd thread on your pipe, fitting or valve as shown below. Find the caliper measurement in the chart and cross reference the nominal NPT pipe size. Don't get confused, the actual measurement is not the same as the NPT pipe size.
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