表1
公称 直径 | 0# | 1# | 2# | 3# | 4# | 5# | 6# | 8# | 10#&12# | 1/4 | 5/16 | |||||||||||
公称 长度 | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB |
0.75 | 0.25 | 0.19 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
0.88 | 0.25 | 0.19 | 0.25 | 0.17 | 0.25 | 0.16 | 0.25 | 0.15 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
1.00 | 0.50 | 0.44 | 0.25 | 0.17 | 0.25 | 0.16 | 0.25 | 0.15 | 0.25 | 0.12 | 0.25 | 0.12 | - | - | - | - | - | - | - | - | - | - |
1.25 | 0.75 | 0.69 | 0.62 | 0.55 | 0.62 | 0.54 | 0.62 | 0.52 | 0.25 | 0.12 | 0.25 | 0.12 | 0.50 | 0.34 | 0.38 | 0.22 | 0.38 | 0.17 | - | - | - | - |
1.50 |
|
| 0.88 | 0.80 | 0.88 | 0.79 | 0.88 | 0.77 | 0.75 | 0.62 | 0.75 | 0.62 | 0.50 | 0.34 | 0.38 | 0.22 | 0.38 | 0.17 | 0.50 | 0.25 | - | - |
1.75 |
|
|
|
| 1.12 | 1.04 | 1.12 | 1.02 | 0.75 | 0.62 | 0.75 | 0.62 | 1.00 | 0.84 | 0.88 | 0.72 | 0.88 | 0.67 | 0.50 | 0.25 | 0.62 | 0.35 |
2.00 |
|
|
|
|
|
| 1.38 | 1.27 | 1.25 | 1.12 | 1.25 | 1.12 | 1.00 | 0.84 | 0.88 | 0.72 | 0.88 | 0.67 | 1.00 | 0.75 | 0.62 | 0.35 |
2.25 |
|
|
|
|
|
|
|
| 1.25 | 1.12 | 1.25 | 1.12 | 1.50 | 1.34 | 1.38 | 1.22 | 1.38 | 1.17 | 1.00 | 0.75 | 1.12 | 0.85 |
2.50 |
|
|
|
|
|
|
|
|
|
| 1.75 | 1.62 | 1.50 | 1.34 | 1.38 | 1.22 | 1.38 | 1.17 | 1.50 | 1.25 | 1.12 | 0.85 |
2.75 |
|
|
|
|
|
|
|
|
|
|
|
| 2.00 | 1.84 | 1.88 | 1.72 | 1.88 | 1.67 | 1.50 | 1.25 | 1.62 | 1.35 |
3.00 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1.88 | 1.72 | 1.88 | 1.67 | 2.00 | 1.75 | 1.62 | 1.35 |
3.25 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 2.38 | 2.22 | 2.38 | 2.17 | 2.00 | 1.75 | 2.12 | 1.85 |
3.50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 2.38 | 2.17 | 2.50 | 2.25 | 2.12 | 1.85 |
3.75 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 2.88 | 2.67 | 2.50 | 2.25 | 2.62 | 2.35 |
4.00 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 2.88 | 2.67 | 3.00 | 2.75 | 2.62 | 2.35 |
4.25 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 3.00 | 2.75 | 3.12 | 2.85 |
4.50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 3.50 | 3.25 | 3.12 | 2.85 |
4.75 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 3.50 | 3.25 | 3.62 | 3.35 |
5.00 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4.00 | 3.75 | 3.62 | 3.35 |
5.25 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4.12 | 3.85 |
5.50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4.12 | 3.85 |
5.75 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4.62 | 4.35 |
6.00 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4.62 | 4.35 |
6.25 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 5.12 | 4.85 |
公称 直径 | 3/8 | 7/16 | 1/2&9/16 | 5/8 | 3/4 | 7/8 | 1 | 1-1/8 | 1-1/4 | 1-3/8 | 1-1/2 | |||||||||||
公称 长度 | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB |
1.75 | 0.50 | 0.19 | - | - | - | - | - | - | - | - | - | - | - | - |
|
|
|
|
|
|
|
|
2.00 | 0.50 | 0.19 | 0.62 | 0.27 | - | - | - | - | - | - | - | - | - | - |
|
|
|
|
|
|
|
|
2.25 | 1.00 | 0.69 | 0.62 | 0.27 | 0.75 | 0.36 | - | - | - | - | - | - | - | - |
|
|
|
|
|
|
|
|
2.50 | 1.00 | 0.69 | 1.12 | 0.77 | 0.75 | 0.36 | 0.75 | 0.30 | - | - | - | - | - | - |
|
|
|
|
|
|
|
|
2.75 | 1.50 | 1.19 | 1.12 | 0.77 | 0.75 | 0.36 | 0.75 | 0.30 | - | - | - | - | - | - |
|
|
|
|
|
|
|
|
3.00 | 1.50 | 1.19 | 1.62 | 1.27 | 1.50 | 1.12 | 0.75 | 0.30 | 1.00 | 0.50 | - | - | - | - |
|
|
|
|
|
|
|
|
3.25 | 2.00 | 1.69 | 1.62 | 1.27 | 1.50 | 1.12 | 1.50 | 1.04 | 1.00 | 0.50 | 1.00 | 0.44 | - | - |
|
|
|
|
|
|
|
|
3.50 | 2.00 | 1.69 | 2.12 | 1.77 | 1.50 | 1.12 | 1.50 | 1.04 | 1.00 | 0.50 | 1.00 | 0.44 | 1.00 | 0.38 |
|
|
|
|
|
|
|
|
3.75 | 2.50 | 2.19 | 2.12 | 1.77 | 2.25 | 1.86 | 1.50 | 1.04 | 1.00 | 0.50 | 1.00 | 0.44 | 1.00 | 0.38 |
|
|
|
|
|
|
|
|
4.00 | 2.50 | 2.19 | 2.22 | 2.27 | 2.25 | 1.86 | 2.25 | 1.80 | 2.00 | 1.50 | 1.00 | 0.44 | 1.00 | 0.38 |
|
|
|
|
|
|
|
|
4.25 | 3.00 | 2.69 | 2.62 | 2.27 | 2.25 | 1.86 | 2.25 | 1.80 | 2.00 | 1.50 | 2.00 | 1.44 | 1.00 | 0.38 |
|
|
|
|
|
|
|
|
4.50 | 3.00 | 2.69 | 3.12 | 2.77 | 3.00 | 2.62 | 2.25 | 1.80 | 2.00 | 1.50 | 2.00 | 1.44 | 2.00 | 1.38 |
|
|
|
|
|
|
|
|
4.75 | 3.50 | 3.19 | 3.12 | 2.77 | 3.00 | 2.62 | 3.00 | 2.54 | 2.00 | 1.50 | 2.00 | 1.44 | 2.00 | 1.38 | 1.94 | 0.10 |
|
|
|
|
|
|
5.00 | 3.50 | 3.19 | 3.62 | 3.27 | 3.00 | 2.62 | 3.00 | 2.54 | 3.00 | 2.50 | 2.00 | 1.44 | 2.00 | 1.38 | 2.19 | 0.35 |
|
|
|
|
|
|
5.25 | 4.00 | 3.69 | 3.62 | 3.27 | 3.75 | 3.36 | 3.00 | 2.54 | 3.00 | 2.50 | 3.00 | 2.44 | 2.00 | 1.38 | 2.44 | 0.60 | 2.13 | 0.16 |
|
|
|
|
5.50 | 4.00 | 3.69 | 4.12 | 3.77 | 3.75 | 3.36 | 3.75 | 3.30 | 3.00 | 2.50 | 3.00 | 2.44 | 3.00 | 2.38 | 2.69 | 0.85 | 2.38 | 0.41 |
|
|
|
|
5.75 | 4.50 | 4.19 | 4.12 | 3.77 | 3.75 | 3.36 | 3.75 | 3.30 | 3.00 | 2.50 | 3.00 | 2.44 | 3.00 | 2.38 | 2.94 | 1.10 | 2.63 | 0.66 | 2.31 | 0.10 |
|
|
6.00 | 4.50 | 4.19 | 4.62 | 4.27 | 4.50 | 4.12 | 3.75 | 3.30 | 4.00 | 3.50 | 3.00 | 2.44 | 3.00 | 2.38 | 3.19 | 1.35 | 2.88 | 0.91 | 2.56 | 0.35 |
|
|
6.25 | 5.00 | 4.69 | 4.62 | 4.27 | 4.50 | 4.12 | 4.50 | 4.04 | 4.00 | 3.50 | 4.00 | 3.44 | 3.00 | 2.38 | 3.44 | 1.60 | 3.13 | 1.16 | 2.81 | 0.60 | 2.50 | 0.17 |
6.50 | 5.00 | 4.69 | 5.12 | 4.77 | 4.50 | 4.12 | 4.50 | 4.04 | 4.00 | 3.50 | 4.00 | 3.44 | 4.00 | 3.38 | 3.69 | 1.85 | 3.38 | 1.41 | 3.06 | 0.85 | 2.75 | 0.42 |
6.75 | 5.50 | 5.19 | 5.12 | 4.77 | 5.25 | 4.86 | 4.50 | 4.04 | 4.00 | 3.50 | 4.00 | 3.44 | 4.00 | 3.38 | 3.94 | 2.10 | 3.63 | 1.66 | 3.31 | 1.10 | 3.00 | 0.67 |
7.00 | 5.50 | 5.19 | 5.62 | 5.27 | 5.25 | 4.86 | 5.25 | 4.80 | 5.00 | 4.50 | 4.00 | 3.44 | 4.00 | 3.38 | 4.19 | 2.35 | 3.88 | 1.91 | 3.56 | 1.35 | 3.25 | 0.92 |
7.25 | 6.00 | 5.69 | 5.62 | 5.27 | 5.25 | 4.86 | 5.25 | 4.80 | 5.00 | 4.50 | 5.00 | 4.44 | 4.00 | 3.38 | 4.44 | 2.60 | 4.13 | 2.16 | 3.81 | 1.60 | 3.50 | 1.17 |
7.50 | 6.00 | 5.69 | 6.12 | 5.77 | 6.00 | 5.62 | 5.25 | 4.80 | 5.00 | 4.50 | 5.00 | 4.44 | 5.00 | 4.38 | 4.69 | 2.85 | 4.38 | 2.41 | 4.06 | 1.85 | 3.75 | 1.42 |
7.75 |
|
| 6.12 | 5.77 | 6.00 | 5.62 | 6.00 | 5.54 | 5.00 | 4.50 | 5.00 | 4.44 | 5.00 | 4.38 | 4.94 | 3.10 | 4.63 | 2.66 | 4.31 | 2.10 | 4.00 | 1.67 |
8.00 |
|
| 6.62 | 6.27 | 6.00 | 5.62 | 6.30 | 5.54 | 6.00 | 5.50 | 5.00 | 4.44 | 5.00 | 4.38 | 5.19 | 3.35 | 4.88 | 2.91 | 4.56 | 2.35 | 4.25 | 1.92 |
8.50 |
|
| 7.12 | 6.77 | 7.00 | 6.62 | 6.75 | 6.30 | 6.00 | 5.50 | 6.00 | 5.44 | 6.00 | 5.38 | 5.69 | 3.85 | 5.35 | 3.41 | 5.06 | 2.85 | 4.75 | 2.42 |
9.00 |
|
| 7.62 | 7.27 | 7.00 | 6.62 | 6.75 | 6.30 | 7.00 | 6.50 | 6.00 | 5.44 | 6.00 | 5.38 | 6.19 | 4.35 | 5.88 | 3.91 | 5.56 | 3.35 | 5.25 | 2.92 |
9.50 |
|
|
|
| 8.00 | 7.62 | 7.75 | 7.30 | 7.00 | 6.50 | 7.00 | 6.44 | 7.00 | 6.38 | 9.69 | 4.85 | 6.35 | 4.41 | 6.06 | 3.85 | 5.75 | 3.42 |
10.00 |
|
|
|
| 8.00 | 7.62 | 7.75 | 7.30 | 8.00 | 7.50 | 7.00 | 6.44 | 7.00 | 6.38 | 7.19 | 5.35 | 6.88 | 4.91 | 6.56 | 4.35 | 6.25 | 3.92 |
11.00 |
|
|
|
|
|
| 9.25 | 8.80 | 9.00 | 8.50 | 8.00 | 7.44 | 8.00 | 7.38 | 8.19 | 6.35 | 7.88 | 5.91 | 7.56 | 5.35 | 7.25 | 4.92 |
12.00 |
|
|
|
|
|
| 10.25 | 9.80 | 10.00 | 9.50 | 9.00 | 8.44 | 9.00 | 8.38 | 9.19 | 7.35 | 8.88 | 6.91 | 8.56 | 6.35 | 8.25 | 5.92 |
13.00 |
|
|
|
|
|
|
|
| 11.00 | 10.50 | 10.00 | 9.44 | 10.00 | 9.38 | 10.19 | 8.35 | 9.88 | 7.91 | 9.56 | 7.35 | 9.25 | 6.92 |
14.00 |
|
|
|
|
|
|
|
| 12.00 | 11.50 | 11.00 | 10.44 | 11.00 | 10.38 | 11.19 | 9.35 | 10.88 | 8.91 | 10.56 | 8.35 | 10.25 | 7.92 |
15.00 |
|
|
|
|
|
|
|
| 13.00 | 12.50 | 12.00 | 11.44 | 12.00 | 11.38 | 12.19 | 10.35 | 11.88 | 9.91 | 11.56 | 9.35 | 11.25 | 8.92 |
16.00 |
|
|
|
|
|
|
|
|
|
| 13.00 | 12.44 | 13.00 | 12.38 | 13.19 | 11.35 | 12.88 | 10.91 | 12.56 | 10.35 | 12.25 | 9.92 |
17.00 |
|
|
|
|
|
|
|
|
|
| 14.00 | 13.44 | 14.00 | 13.38 | 14.19 | 12.35 | 13.88 | 11.91 | 13.56 | 11.35 | 13.25 | 10.92 |
18.00 |
|
|
|
|
|
|
|
|
|
| 15.00 | 14.44 | 15.00 | 14.38 | 15.19 | 13.35 | 14.88 | 12.91 | 14.56 | 12.35 | 14.25 | 11.92 |
19.00 |
|
|
|
|
|
|
|
|
|
|
|
| 16.00 | 15.38 | 16.19 | 14.35 | 15.88 | 13.91 | 15.56 | 13.35 | 15.25 | 12.92 |
20.00 |
|
|
|
|
|
|
|
|
|
|
|
| 17.00 | 16.38 | 17.19 | 15.35 | 16.88 | 14.91 | 16.56 | 14.35 | 16.25 | 13.92 |
1. 表中LG为最大值,表示螺钉的最小设计夹紧长度。测量时将一个无螺纹内倒角或无沉孔的通端螺纹环规,用手尽力拧入螺纹,直到拧不动为止,此时测得的从头部支承面到螺纹环规端面之间的距离即为LG。表中LB为最小值,表达的是螺钉的最小无螺纹杆部长度。对于每一个长度规格,无螺纹杆部长度等于LG减去5倍的螺纹螺距(UNRC系列)。 2. 对于公称长度位于表左侧两档公称长度之间的规格,其LG、LB按表中相邻公称长度中较短一档的LG和LB。例如:公称直径1/4 in,公称长度1.88 in的螺钉,LG为0.50 in,LB为0.25 in。 3. 表中“-”公称长度的螺钉,为全螺纹(满扣)产品。检查时用一个无螺纹内倒角或无沉孔的通端螺纹环规,用手尽力拧入螺纹。对于公称直径从0#(0.0060 in)至5/8 in(包括5/8 in)的螺钉,其螺纹肩距最大不超过2倍螺距;对于公称直径大于1 in和长度小于最小螺纹长度LT加5倍螺距(UNRC系列)的螺钉,应为全螺纹(满扣)产品。其肩距可根据实际情况,但也应尽可能小。 4. 对于公称长度大于本表中,已规定LG和LB值所对应长度尺寸的螺钉和公称直径大于1 in的螺钉,其最大夹紧长度LG和最小无螺纹杆长LB,见表2。 LG=L-LT LB-L-LTT |
表2
螺钉公称直径 | 最小螺纹长度 LT | 最大螺纹总长度 LTT |
0(0.0600) | 0.50 | 0.62 |
1(0.0730) | 0.62 | 0.77 |
2(0.0860) | 0.62 | 0.80 |
3(0.0990) | 0.62 | 0.83 |
4(0.1120) | 0.75 | 0.99 |
5(0.1250) | 0.75 | 1.00 |
6(0.1380) | 0.75 | 1.05 |
8(0.1640) | 0.88 | 1.19 |
10(0.1900) | 0.88 | 1.27 |
12(0.2160) | 0.88 | 1.27 |
1/4(0.2500) | 1.00 | 1.50 |
5/16(0.3125) | 1.12 | 1.71 |
3/8(0.3750) | 1.25 | 1.94 |
7/16(0.4735) | 1.38 | 2.17 |
1/2(0.5000) | 1.50 | 2.38 |
9/16(0.5625) | 1.50 | 2..38 |
5/8(0.6250) | 1.75 | 2.82 |
3/4(0.7500) | 2.00 | 3.25 |
7/8(0.8750) | 2.25 | 3.69 |
1(1.0000) | 2.50 | 4.12 |
1-1/8(1.1250) | 2.81 | 4.65 |
1-1/4(1.2500) | 3.12 | 5.09 |
1-3/8(1.3750) | 3.44 | 5.65 |
1-1/2(1.5000) | 3.75 | 6.08 |
1-3/4(1.7500) | 4.38 | 7.13 |
2(2.0000) | 5.00 | 8.11 |
2-1/4(2.2500) | 5.62 | 8.99 |
2-1/2(2.5000) | 6.25 | 10.00 |
2-3/4(2.7500) | 6.88 | 10.87 |
3(3.0000) | 7.50 | 11.75 |
3-1/4(3.2500) | 8.12 | 12.63 |
3-1/2(3.5000) | 8.75 | 13.50 |
3-3/4(3.7500 | 9.38 | 14.37 |
4(4.0000 | 10.00 | 15.25 |
Taper keys of keyways
Hexalobular internal driving feature for bolts and screws
Fasteners-Ends of parts with external thread(ISO 4753:2011, MOD)
Fasteners - Bolts, screws and studs - Nominal lengths and thread lengths (ISO 888:2012, MOD)
Countersinks for countersunk head screws
Connections with waisted stud - Tape classification
Flared couplings - Flared end
Hexalobular internal driving feature for bolts and screws
Knurl
Drill diameter for use prior to tapping screw threads
Square and rectangular keyways
Woodruff keyways
General purpose bolts and screws - Radius under the head
Center holes
Rivet shank diameters (except blind rivets)【ISO 1051:1999】
Stress area and bearing area for threaded fasteners
Countersunk flat head screws - Part2: Penetration depth of cross recesses
Offset cruciform recess fro rotary fastening devices
Clearance holes for rivets
Hot-rolled channel steel
Hexagon lobuar for fasteners - Type E
Fasteners - Clearanc holes for bolts and screws
Fasteners - Split pin holes and wire holes (ISO 7378:1983)
Countersunk head screws - Head configuration and gauging
Cross recesses for screws
Fastners - Widths across flats of hexagon products
Self-tapping screws for metric ISO threads - Part 2: Guide values for hole diameters
Thread run-outs and thread undercuts
Tapping screw connections - Guideline values for core hole diameters and use
12 point socket for bolts and screws
60° centre holes - Types R. A. B. and C
Thread rolling screws for ISO metric thread guidelinge values for hole diameters
Thread ends and lengths of projection of bolt ends for metric ISO threads according to DIN 13
Knurle
Connections for hydraulic fluid power and general use - Ports and stud ends with ISO 261 metric threads and O-ring sealing - Part 1: Ports with truncated housing for O-ring
Hexalobular internal driving feature for bolts and screws
Connections for general use and fluid power - Ports and stud ends with ISO 228-1 threads with elastomeric or metal-to-metal sealing - Part 1: Threaded ports
Dimensioning and indication of knurling
Fasteners—Ends of parts with external ISO metric thread
Connections for general use and fluid power - Ports and stud ends with ISO 228-1 threads with elastomeric or metal-to-metal sealing - Part 4: Stud ends for general use only with metal-to-metal sealing (type B)
Hexalobular internal driving feature for bolts and screws
Geometrical product specifications (GPS) - Indication of surface texture in technical product documentation
General purpose bolts and screws─Metric series─Radii under the head
Rivet shank diameters
Aerospace - Spline drives - Wrenching configuration - Metric series
Connections for general use and fluid power - Ports and stud ends with ISO 261 threads with elastomeric or metal-to-metal sealing - Part 1: Threaded ports
Connections for general use and fluid power - Ports and stud ends with ISO 261 threads with elastomeric or metal-to-metal sealing - Part 2: Stud ends with elastomeric sealing (type E)
Connections for general use and fluid power - Ports and stud ends with ISO 261 threads with elastomeric or metal-to-metal sealing - Part 3: Stud ends with metal-to-metal sealing (type B)
Connections for general use and fluid power - Ports and stud ends with ISO 725 threads and O-ring sealing - Part 3: Light-duty (L series) stud ends
Fasteners—Surface discontinuities— Part2:Nuts
Countersunk flat hed screws—Part 2:Penetration depth of cross recesses
Fasteners—Surface discontinuities— Part1:Bolts,screws and studs for general requirements
Fasteners—Surface discontinuities— Part3:Bolts,screw and studs for special requirements
Internal drive, offset cruciform recess (Torq-Set) for rotary fastening devices. Metric series
Fasteners—Thread undercuts for external metric ISO
Cross recessed-H type
Cross recessed-Z type
Countersunk head screws—Head configuration and guaging
Fasteners—Hexagon products—Widths across flats
Fasteners─Clearance holes for bolts and screws
Thread run-out for fasteners with thread in accordance with ISO 261 and ISO 262
Copper tubes of circular section - Dimensions
Hexalobular internal driving feature for bolts and screws
General purpose bolts and screws - Metric series -- Radii under the head
Straight cylindrical involute splines -- side fit -- Generalities, dimensions and inspection
Knurling
Automatic Cold Header - Hole Size
Recess Dimensions for Flat 82° Countersunk Head Screws
Dimensions of Threads and Points for Types BF and BT Thread-Cutting Tapping Screws
Dimensions of Threads and Points for Type D, F, G, and T Thread-Cutting Tapping Screws
Dimensions of Type TRS Tapping Screws
Standard Test-Plate Thickness and Hole Sizes for Drive-Test Inspection of Tapping Screws
Dimensions of Alternate Styles of Points for Thumb and Wing Screws
Hot rolled flat steel bars and steel wide flats for general purposes - Dimensions and tolerances on shape and dimensions
Aerospace series - Installation holes for inserts, screw thread, helical coil, self-locking - Design standard
Countersunk head screws - Head configuration and gauging
Fasteners - Clearanc holes for bolts and screws
Standard Test-Plate Thickness and Hole Sizes for Drive-Test Inspection of Tapping Screws
Dimensions of Threads and Points for Types BF and BT Thread-Cutting Tapping Screws
Dimensions of Threads and Points for Type D, F, G, and T Thread-Cutting Tapping Screws
Dimensions of Type TRS Tapping Screws
Dimensions of Hexagon Sockets
Metic threads and points for tapping screws
Type BF and BT, Thread Cutting Tapping Screws [Table 7]
Type D,F,G and Type T Thread Cutting Tapping Screws [Table 8]
Aerospace series - Six lobe recess - Dimensions and tolerances
Threaded ends of fitting