Calculating the correct MTH Series stud length
To calculate the correct Siri MTH panjang stud, first select the receptacle and determine the thicknesses used in that receptacle’s formula.
The calculation is not the same for every receptacle. Depending on the selected Type A to G receptacle, the total thickness T may include the removable-panel thickness, frame thickness or a minimum installation dimension.
Once T has been calculated, use the stud-length table for the exact receptacle type to find the required length number.
Use the correct table for the receptacle type
The same calculated thickness can correspond to a different stud length when another receptacle type is used. Always use the catalogue table for the selected Type A, B, C, D, E, F or G receptacle.
MTH stud-length selection process
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Pilih bekas
Identify whether the assembly uses a Type A, B, C, D, E, F or G receptacle.
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Measure the assembly
Determine the panel thickness P, frame thickness F and dimension X where required.
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Kira T
Apply the formula belonging to the selected receptacle type.
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Cari nombor panjang
Find T in the correct catalogue table and read the corresponding stud length number.
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Select the stud version
Choose the head style, material, finish and installation design.
Dimensions used in the formulas
| Simbol | Pengertian |
|---|---|
| T | Calculated total thickness used to select the stud length number. |
| P | Ketebalan panel boleh tanggal di mana stud dipasang. |
| F | Frame or supporting-panel thickness included in the formula for most receptacle types. |
| X | Installation dimension used for Type D receptacles. The specified minimum is 0.5 mm. |
MTH stud-length formulas at a glance
| Jenis bekas | Formula | Syarat tambahan |
|---|---|---|
| Types A, E, F and G | T = P + F | Use the stud-length table for the exact receptacle type. |
| Taipkan C | T = P + F | T must be at least 9.9 mm. |
| Jenis B | T = P + F | F must be at least 0.75 mm. |
| Jenis D | T = P + X | X must be at least 0.5 mm. |
FORMULA 1
Type A, C, E, F and G receptacles
For these receptacles, add the removable-panel thickness P and frame thickness F.
T = P + F
For Type C receptacles, T must be at least 9.9 mm.
FORMULA 2
Type B receptacles
Type B receptacles also use the combined panel and frame thickness. However, frame thickness F must be at least 0.75 mm.
T = P + F
F = 0.75 mm minimum
FORMULA 3
Type D receptacles
Type D receptacles do not use the complete frame thickness in the stud-length calculation. Instead, add panel thickness P and installation dimension X.
T = P + X
X = minimum 0.5 mm
What changes when the MTH assembly is sealed?
A sealed MTH assembly requires the MTHGIR gasket dalaman dan MTHGOR outer gasket.
According to the supplied calculation guidance, the gasket arrangement adds 0.75 mm to the calculated total thickness.
Sealed assembly allowance
Sealed T = standard T + 0.75 mm
Recheck the stud-length table after adding the gasket allowance. The sealed assembly may require the next stud length.
Select the stud style after calculating the length
The length number is only one part of the complete stud reference. After calculating it, select the configuration required for the application.
Tool-operated
Slotted, cross-recessed or tamper-resistant head styles.
dikendalikan dengan tangan
Wing, folding-ring or other manually operated designs.
Bahan dan kemasan
Zinc-plated steel or stainless steel, depending on the selected product version.
Head installation
Standard raised-head or flush-mounted stud designs.
Example 1: Type A receptacle
| Panel thickness P | 3.00 mm |
|---|---|
| Frame thickness F | 1.50 mm |
| Sampul | Type A bronze, zinc-plated MTHR25BZ |
| Stud style | Wing head, zinc-plated steel |
| Mesin basuh penahan | MTHWSS |
Kira T
T = P + F
T = 3.00 + 1.50 = 4.50 mm
In the Type A table, 4.50 mm falls within the 3.80 hingga 4.60 mm range. The required stud length number is therefore 5.
Example 2: Type B receptacle
| Panel thickness P | 7.20 mm |
|---|---|
| Frame thickness F | 4.50 mm |
| Sampul | Type B aluminium MTHRPM2HA |
| Stud style | Stainless-steel folding-ring stud |
| Mesin basuh penahan | MTHWFS |
Kira T
T = P + F
T = 7.20 + 4.50 = 11.70 mm
The 4.50 mm frame exceeds the 0.75 mm minimum. In the Type B table, 11.70 mm falls within the 11.40 hingga 12.20 mm range, giving stud length number 16.
Perhimpunan yang dipilih
| stud | MTHTLFR-16S |
|---|---|
| Mesin basuh penahan | MTHWFS |
| Sampul | MTHRPM2HA |
Example 3: Type C receptacle
| Panel thickness P | 3.20 mm |
|---|---|
| Frame thickness F | 10.50 mm |
| Sampul | Type C stainless-steel MTHRF25S |
| Stud style | Stainless-steel cross-recessed stud |
| Mesin basuh penahan | MTHWFS |
Kira T
T = P + F
T = 3.20 + 10.50 = 13.70 mm
The result is above the 9.9 mm minimum for Type C receptacles. In the Type C table, 13.70 mm corresponds to stud length number 6, covering total thicknesses from 13.70 hingga 14.50 mm.
Example 4: Type D receptacle
| Panel thickness P | 8.15 mm |
|---|---|
| Ketebalan bingkai | 8.00 mm |
| Dimensi X | 0.50 mm |
| Sampul | Type D zinc die-cast MTHRTZZ |
| Stud style | Slotted, zinc-plated steel stud |
| Mesin basuh penahan | MTHWFS |
Kira T
T = P + X
T = 8.15 + 0.50 = 8.65 mm
The full 8.00 mm frame thickness is not included in the Type D formula. In the Type D table, 8.65 mm falls within the 8.40 hingga 9.15 mm range, giving length number 11.
Perhimpunan yang dipilih
| stud | MTHTLS-11Z |
|---|---|
| Mesin basuh penahan | MTHWFS |
| Sampul | MTHRTZZ |
Example 5: Type E adjustable receptacle
| Panel thickness P | 3.00 mm |
|---|---|
| Frame thickness F | 1.50 mm |
| Sampul | Type E stainless-steel adjustable MTHRA24S |
| Stud style | Stainless-steel flush cross-recessed stud |
| Mesin basuh penahan | MTHFWFTP |
Kira T
T = P + F
T = 3.00 + 1.50 = 4.50 mm
In the Type E table, 4.50 mm falls within the 4.32 hingga 9.65 mm range for stud length number 3.
Perhimpunan yang dipilih
| stud | MTHFTLC-3S |
|---|---|
| Mesin basuh penahan | MTHFWFTP |
| Sampul | MTHRA24S |
Periksa pemasangan lengkap sebelum membuat pesanan
| daftar | Apa yang perlu disahkan |
|---|---|
| Jenis bekas | Confirm the exact Type A to G receptacle before selecting a length table. |
| Panel thickness P | Measure the removable panel, including any relevant coating or finish. |
| Frame thickness F | Include F where required and check any specified minimum value. |
| Dimensi X | For Type D receptacles, confirm the actual installation dimension rather than using the frame thickness. |
| Komponen pengedap | Add 0.75 mm when the specified MTH gasket arrangement is used. |
| Mesin basuh penahan | Verify that the selected washer is compatible with the stud head and installation. |
| Boundary values | When a calculated value falls exactly between two lengths, select the longer stud. |
| Prototype fit | Confirm that the fastener locks securely without excessive force, looseness or panel deformation. |
Test the selected stud length in the actual assembly
Panel tolerances, coatings, gaskets and receptacle positioning can affect the final fit. Test a complete sample assembly before ordering a large production quantity.
Need help calculating an MTH stud length?
Send us the receptacle part number, panel and frame thicknesses, dimension X where applicable, retaining washer, required head style and an assembly drawing. We can help identify the appropriate MTH stud length.