Diyvehiclerepair
Metric clearance and tapping drill hole sizes.
| Size | Clearance Hole mm | Tapping Drill (std Pitch) |
|---|---|---|
| M6 | 6.5 | 5.0 mm |
| M8 | 9 | 6.75 mm |
| M10 | 11 | 8.5 mm |
| M12 | 14 | 10.25 mm |
- What do metric thread sizes mean?
- How do I know my metric thread size?
- How do you specify metric threads?
- What does M12 mean?
- Are metric threads fine or coarse?
- What is the standard pitch for metric thread?
- Is UNC thread same as metric?
- Are NPT and BSP the same?
- Is G thread same as BSP?
- What is an M12 thread?
- What M12x1 75?
- Does M8 mean 8mm?
What do metric thread sizes mean?
Taking a closer look at this description, let's explore its meaning: M = This designates the fastener is a metric size. 10 = The nominal diameter in millimeters. 1.0 = The thread pitch, or distance between threads, in millimeters. 20 = The fastener's length, in millimeters.
How do I know my metric thread size?
Metric fasteners are specified with a thread pitch instead of a thread count. The thread pitch is the distance between threads expressed in millimetres (measured along the length of the fastener). For example a thread pitch of 1.5 means that the distance between one thread and the next is 1.5mm.
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).
What does M12 mean?
Those are metric screw dimensions. M10 means a 10 millimeter outer diameter for the bolt or whatever piece it is; M12 means 12 millimeters. The part after the 'x' is the pitch -- how many mm a thread is wide. To figure out which you have, you can measure the existing part with calipers and a thread gauge.
Are metric threads fine or coarse?
Metric thread callouts are fundamentally different because the thread pitch (distance between each thread, in mm) is specified instead of threads per inch or per mm. For example, an M10x1. 5 (coarse) thread has a 1.5mm pitch, while an M10x1. 25 (fine) thread has a 1.25mm pitch.
What is the standard pitch for metric thread?
ISO 724 specifies basic dimensions of metric threads in accordance with ISO 261. Dimensions refer to the basic profile in accordance with ISO 68. The pitch varies from coarse to extra fine with up to 5 different pitches for some dimensions. The thread angle is 60o and the thread depth is 0.614 x pitch.
Is UNC thread same as metric?
A 1/4 UNF thread is about 14% stronger than its UNC counterpart. ... The metric coarse thread is actually between UN coarse and fine thread, and the metric fine thread is finer than the UNF threads.
Are NPT and BSP the same?
Both NPT and BSP are pipe thread standards for screw threads used on pipes and pipe fittings to seal pipes. Both threads have the same pitch and the familiar shaped peaks and valleys. ... In BSP, they are rounded. Secondly, the NPT angle of the thread is 60 degrees and the BSP angle is 55 degrees.
Is G thread same as BSP?
Is G thread the same as BSPP? The two types of thread are the same parallel straight. BSPP is the British Standard Pipe Parallel thread and it is also denoted by the letter G (ISO standard). Therefore, BSPP is the same as G.
What is an M12 thread?
The first half (M12), is the size measurement (metric) taken across the outside diameter of the thread (which in this case is 12mm). The second half is the thread pitch, which is the measurement of threads/inch (which in this case is 1.75).
What M12x1 75?
M12x1. 75 is the metric way to indicate a thread. M12 means that the OD thread is 12mm, the 1.75 is the step of the thread.
Does M8 mean 8mm?
The defined diameter of metric bolts is actually slightly larger than the actual diameter of the bolt shaft. 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.
