The shape part of the edge of the thread shall be broken with radius of 0.2mm to 0.3mm.
量規螺紋邊口應以0.2~0.3mm半徑倒圓。
Purpose目的：
To check the maximum dimensions of the screw thread and dimension T1 minimum of caps on finished lamps.
檢查成品燈燈頭螺紋大尺寸和T1的小值
Testing 測試方法：
When the cap on a finished lamp has been screwed into the gauge as far as it will go, the center contact shall be co-planar with, or project beyond, surface X.
當成品燈上的燈頭旋入量規內時，燈頭中心觸點應與X面共面或凸出X面。
測試圖紙：
測試參數：
| Reference 尺寸符號 | Dimension/尺寸（mm） | Tolerance/公差（mm） | Limit after wear 磨損后限值（mm） |
| d | 39.50 | +0.03/-0 | 39.55 |
| d1 | 35.90 | +0.03/-0 | 35.95 |
| L | 27 | ±0.1 |
|
| O | 41 | ±0.2 |
|
| P | 6.350 | - |
|
| r | 1.85 | - |
|
| T | 34.0 | +0.0/-0.03 |
|
| V | 26 | ±0.1 |
|
| W | 6 | ±0.1 |
|
產品圖片：
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