英制螺纹的尺寸规格如下：
普通螺纹
惠氏螺纹（Whitworth）：
小螺纹系列（BA）：
名义尺寸：1/16", 3/32", 1/8", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8", 7/16", 1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 1/2", 1 5/8", 1 3/4", 1 7/8", 2", 2 1/4", 2 1/2", 2 3/4", 3", 3 1/4", 3 1/2"
螺距：0.231, 0.250, 0.286, 0.318, 0.356, 0.400, 0.433, 0.476, 0.500, 0.536, 0.563, 0.600, 0.649, 0.694, 0.737, 0.794, 0.864, 0.938, 1.000, 1.064, 1.125, 1.189, 1.250, 1.313, 1.375, 1.438, 1.500, 1.563, 1.625, 1.689, 1.750, 1.814, 1.875, 1.938, 2.000, 2.064, 2.125, 2.189, 2.250, 2.313, 2.375, 2.438, 2.500, 2.563, 2.625, 2.689, 2.750, 2.814, 2.875, 2.938, 3.000, 3.064, 3.125, 3.189, 3.250, 3.313, 3.375, 3.438, 3.500, 3.563, 3.625, 3.689, 3.750, 3.814, 3.875, 3.938, 4.000, 4.064, 4.125, 4.189, 4.250, 4.313, 4.375, 4.438, 4.500, 4.563, 4.625, 4.689, 4.750, 4.814, 4.875, 4.938, 5.000, 5.064, 5.125, 5.189, 5.250, 5.313, 5.375, 5.438, 5.500, 5.563, 5.625, 5.689, 5.750, 5.814, 5.875, 5.938, 6.000, 6.064, 6.125, 6.189, 6.250, 6.313, 6.375, 6.438, 6.500, 6.563, 6.625, 6.689, 6.750, 6.814, 6.875, 6.938, 7