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四方槽半沉頭 AB ABR自攻螺釘 ASME B 18.6.3 (H2B-III+T1A) - 2024

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5/16

3/8

ASME B 18.6.3 (H2B-III+T1A) - 2024 四方槽半沉頭 AB ABR自攻螺釘

尺寸單位: inch
美標ASME B18.6.3 (H2B-III+T1A) - 2024 ASME 四方槽半沉頭 AB ABR自攻螺釘
ASME B 18.6.3 (H2B-III+T1A) - 2024 四方槽半沉頭 AB ABR自攻螺釘
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螺紋尺寸
d
2# 3# 4# 5# 6# 7# 8# 10# 12# 1/4 5/16 3/8
d 公稱
PP
槽號
M 參考
P 最大值
最小值
dk 最大值
最小值
k 參考
f 參考
α 最大值
最小值
L0 ⑥ 公稱
Y ⑥ 螺紋過渡長度(全螺紋) 最大值
b ⑥ 螺紋長度 (長螺釘) 最小值
0.0860 0.0990 0.1120 0.1250 0.1380 0.1510 0.1640 0.1900 0.2160 0.2500 0.3125 0.3750
32 28 24 20 20 19 18 16 14 14 12 12
00 0 0 1R 1R 1R 2R 2R 3R 3R 4R 4R
0.050 0.070 0.070 0.091 0.091 0.091 0.112 0.112 0.133 0.133 0.191 0.191
0.033 0.038 0.038 0.065 0.065 0.065 0.075 0.075 0.095 0.095 0.100 0.100
0.028 0.028 0.028 0.050 0.050 0.050 0.060 0.060 0.080 0.080 0.085 0.085
0.162 0.187 0.212 0.237 0.262 0.287 0.312 0.362 0.412 0.477 0.597 0.717
0.144 0.167 0.191 0.215 0.238 0.262 0.285 0.333 0.380 0.442 0.556 0.670
0.051 0.059 0.067 0.075 0.083 0.091 0.100 0.116 0.132 0.153 0.191 0.230
0.029 0.033 0.037 0.041 0.045 0.049 0.052 0.060 0.068 0.079 0.099 0.117
82° 82° 82° 82° 82° 82° 82° 82° 82° 82° 82° 82°
80° 80° 80° 80° 80° 80° 80° 80° 80° 80° 80° 80°
5/8 3/4 13/16 15/16 1 1-1/8 1-1/4 1-3/8 1-5/8 1-13/16 1-13/16 1-7/8
0.031 0.036 0.042 0.050 0.050 0.053 0.056 0.062 0.071 0.071 0.083 0.083
0.520 0.590 0.670 0.750 0.830 0.910 0.980 1.140 1.300 1.500 1.500 1.500
①,若以小數規定公稱直徑，應省略小數前和小數點后第四位的零。
②,方槽內壁略帶錐度，以保證插入深量規與有鍍層螺釘凹槽的配合。為使插入深測量深度適用于有涂鍍層的螺釘，制造者在生產（鐓頭）時，應為其留出必要的加工余量。
③,表中的“R”表示正常插入深入。
④,螺釘末端釘尖上不允許因螺紋輾壓而形成的虛尖，允許略帶圓弧或圓鈍形末端。
⑤,小于等于8#的螺釘，螺紋牙頂平面寬度不應超過0.004in，大于8#的應不超過0.006in。
⑥,正常情況下，當螺釘長度小于等于其公稱長度L0時應采用全螺紋，過渡螺紋長度應小于等于Y；若螺釘長度大于其公稱長度L0可采用半牙型式，但其螺紋長度應不小于b。
替代列表

長度公差

　　Tapping screws can be made to any length, but they are generally produced in fractional length increments of 1/16 in. for screws up to 1/2 in. long, 1/8 in. for screws over 1/2 in. through 1-1/2 in. long, 1/4 in. for screws over 1-1/2 in. through 3 in. long, and 1/2 in. for screws over 3 in. long.

類型

標稱螺釘長度

長度公差

A、AB、BP

≤1

±0.03

＞1

±0.05

B、BF、BT、C、D、F、G、T、TRS

≤3/4

-0.03

＞3/4,≤1-1/2

-0.05

＞1-1/2

-0.06

注：技術數據僅供參考，請以官方原件為準！
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