螺丝孔经设计标准
螺丝孔的深度必须比螺丝的长度还要深，为了容纳被自攻螺丝切削出来的塑胶屑，以免螺丝孔爆螺丝的选择非常重要，如果螺丝孔深度够的话，选择螺丝牙距大一点的螺丝可以有效防止螺丝孔塑胶材质孔径公差
孔径公差
孔径公差孔径公差
孔径公差
孔径公差
孔径公差
0.0500
0.050.050.05-0.10-0.1-0.10-0.100.05
00.05
0.050.050-0.1-0.10-0.1-0.100.05
0.050.0500.050.050
000-0.100-0.1
0.05
0.050.0500.050.050
00
0-0.1
-0.1
螺丝规格
ABS PC POM PA 1.7
1.9
2.2 2.4
1.6
1.8
2 2.3
2.5
2.0
普通牙螺丝2.3 2.6 2.8 3.0
3.52.9
1.6
2.02.4
1.6
1.8
2 2.3
2.4
2.9
1.6
1.7
2
2.3 2.4
2.6
3
1.6
2.9
1.6
Material ABS ABS/PC ASA PA 46PA46 GF3PA6
PA6 GF30PA66PE-LD PET
PET GF30PMMA POM PP
PA66 GF3PBT
PBT GF30PC
PC GF30%PE-HD 结构设计常用自攻牙螺丝规格与匹配塑
PP TF 20PPO PS PVC-U
Material 材质
Hole Factor 螺丝孔因子Boss Factor 螺丝柱因子Depth Factor 深度因子
孔径公差
孔径公差孔径公差
孔径公差
孔径公差
0.0500
0.05-0.10-0.1-0.1
-0.10.050.0500
0.0500-0.1-0.1-0.10.050.050.050.050.05000000.050.050.050.050.050
00
1.9
2.1 2.3
2.5
2.6 2.8
3.0
2.3
2.4
2.6
3
1.9
2.21.8
2 2.2
2.4
1.8
2 2.2
2.4
2.8
erial
/PC 466 GF30% GF30%6 2.8
2.9
3.5尖牙螺丝0.780.73LD GF30%A 6 GF30% GF30%GF30%HD Boss Factor Depth Factor
2.002.002.001.851.850.800.850.800.850.850.750.750.750.780.750.800.750.820.75Hole Factor 0.800.80 1.801.801.851.801.852.001.852.001.851.80 1.8
1.7
1.7
2.2
2.01.82.00 2.0
2.0
2.0
1.81.8
1.7
1.91.7
2.001.952.002.002.502.002.502.20 2.0
2.22.0
2.0
匹配塑胶孔尺寸
1.8
1.7
1.7
2.0
2.02.0
0.800.800.750.700.720.85TF 20%-U