Square Taper Washers for use with Channels (6° Taper) Type B, and use with I-beams (8° Taper) Type C
IS 6649 (B / C) - 1985 栓接结构用平垫圈 淬火并回火 - 方斜垫圈，B型（斜度6°，用于槽钢）和C型（斜度8°，用于工字钢）
See all versions and complete specifications: Square Taper Washers for use with Channels (6° Taper) Type B, and use with I-beams (8° Taper) Type C — Full Specification Page
| Size | P | k_max | k_min | s_max | s_min | ds_max | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|
| M16 | 22 | 7.5 | 8.5 | 22.52 | 42 | 8° | 45 | 6° |
| M20 | 26 | 7.5 | 8.5 | 26.52 | 42 | 8° | 45 | 6° |
| M24 | 39 | 7.5 | 8.5 | 39.62 | 55 | 8° | 58 | 6° |
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| (M22) |
| 33 |
| 7.5 |
| 8.5 |
| 33.62 |
| 55 |
| 8° |
| 58 |
| 6° |
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