本标準規定了一般用途和流體動力應用的可調節和不可調節輕型(L系列)螺柱端頭及其相關O形圈的尺寸、性能要求和測試程序。 還指定了這些螺柱端部的名稱。
螺紋① d1-n | d2 | d3 | d4 | d5 | d6 | d7 | L1 | L2 | L3 | L4 | L6 | L7 | L8 | L9 | S | |
±0.2 | 公稱 | 公差 | ±0.4 | +0.05 -0.08 | ±0.2 | -0.3 | ±0.2 | ±0.2 | 最小 | ±0.2 | ±0.15 | ±0.1 | ±0.08 | 參考 | ||
3/8-24 UNF-2A | 11.8 | 3.2 | +0.18 | 14.6 | 7.95 | 9.9 | 8 | 5.9 | 5.6 | 15.5 | 7.5 | 1.75 | 3.4 | 0.8 | 9.5 | 12 |
7/16-20 UNF-2A | 13.8 | 4.5 | 16.5 | 9.25 | 11.5 | 9.3 | 6.7 | 7.1 | 18.5 | 9.1 | 2.05 | 4.1 | 0.9 | 10.9 | 14 | |
1/2-20 UNF-2A | 16.8 | 6 | 18.3 | 10.85 | 13 | 10.9 | 6.7 | 7.1 | 18.5 | 9.1 | 2.05 | 4.1 | 0.9 | 10.9 | 17 | |
9/16-18 UNF-2A | 16.8 | 7.5 | +0.22 | 20.2 | 12.24 | 14.6 | 12.3 | 7.9 | 6.9 | 19.6 | 10 | 2.05 | 4.1 | 0.9 | 12.1 | 17 |
3/4-16 UNF-2A | 21.8 | 10 | 25.7 | 16.76 | 19.4 | 16.8 | 8.7 | 7.9 | 22.4 | 11.1 | 2.25 | 4.8 | 1 | 13.8 | 22 | |
7/8-14 UNF-2A | 26.8 | 12.5 | +0.27 | 29.3 | 19.63 | 22.6 | 19.7 | 10 | 9.1 | 25.9 | 12.7 | 2.85 | 5.7 | 1.25 | 16.1 | 27 |
1 1/16-12 UN-2A | 31.8 | 15.5 | 36.7 | 24 | 27.3 | 24 | 12 | 10.4 | 29.5 | 15.1 | 3.35 | 6 | 1.25 | 18.4 | 32 | |
1 3/16-12 UN-2A | 35.8 | 18 | 40.4 | 27.18 | 30.5 | 27.2 | 12 | 10.4 | 29.5 | 15.1 | 3.35 | 6 | 1.25 | 18.4 | 36 | |
1 5/16-12 UN-2A | 40.8 | 21.5 | +0.33 | 44 | 30.35 | 33.7 | 30.4 | 12 | 10.4 | 29.5 | 15.1 | 3.35 | 6 | 1.25 | 18.4 | 41 |
1 5/8-12 UN-2A | 49.8 | 27.5 | 55 | 38.28 | 41.6 | 38.3 | 12 | 10.4 | 29.5 | 15.1 | 3.35 | 6 | 1.25 | 18.4 | 50 | |
1 7/8-12 UN-2A | 54.8 | 33.5 | +0.39 | 62.3 | 44.6 | 48 | 44.6 | 12 | 10.4 | 29.5 | 15.1 | 3.35 | 6 | 1.25 | 18.4 | 55 |
2 1/2-12 UN-2A | 69.8 | 45 | 80.3 | 60.48 | 63.8 | 60.5 | 12 | 10.4 | 29.5 | 15.1 | 3.35 | 6 | 1.25 | 18.4 | 70 | |
①基本尺寸見ISO 725,公差等級(2A)見ISO 5864。 |
螺紋
| 雙頭螺栓端頭樣式 | |||||||||||
不可調節 | 可調節 | |||||||||||
工作壓力 | 試驗壓力 | 工作壓力 | 試驗壓力 | |||||||||
Burst | Impulse | Burst | Impulse | |||||||||
MPa | bar | MPa | bar | MPa | bar | MPa | bar | MPa | bar | MPa | bar | |
3/8-24 UNF-2A | 31.5 | 315 | 126 | 1260 | 41.9 | 419 | 31.5 | 315 | 126 | 1260 | 41.9 | 419 |
7/16-20 UNF-2A | 31.5 | 315 | 126 | 1260 | 41.9 | 419 | 31.5 | 315 | 126 | 1260 | 41.9 | 419 |
1/2-20 UNF-2A | 31.5 | 315 | 126 | 1260 | 41.9 | 419 | 31.5 | 315 | 126 | 1260 | 41.9 | 419 |
9/16-18 UNF-2A | 31.5 | 315 | 126 | 1260 | 41.9 | 419 | 25 | 250 | 100 | 1000 | 33.2 | 332 |
3/4-16 UNF-2A | 31.5 | 315 | 126 | 1260 | 41.9 | 419 | 25 | 250 | 100 | 1000 | 33.2 | 332 |
7/8-14 UNF-2A | 25 | 250 | 100 | 1000 | 33.2 | 332 | 20 | 200 | 80 | 800 | 26.6 | 266 |
1 1/16-12 UN-2A | 25 | 250 | 100 | 1000 | 33.2 | 332 | 20 | 200 | 80 | 800 | 26.6 | 266 |
1 3/16-12 UN-2A | 20 | 200 | 80 | 800 | 26.6 | 266 | 16 | 160 | 64 | 640 | 21.3 | 213 |
1 5/16-12 UN-2A | 20 | 200 | 80 | 800 | 26.6 | 266 | 16 | 160 | 64 | 640 | 21.3 | 213 |
1 5/8-12 UN-2A | 16 | 160 | 64 | 640 | 21.3 | 213 | 12.5 | 125 | 50 | 500 | 16.6 | 166 |
1 7/8-12 UN-2A | 16 | 160 | 64 | 640 | 21.3 | 213 | 12.5 | 125 | 50 | 500 | 16.6 | 166 |
2 1/2-12 UN-2A | 12.5 | 125 | 50 | 500 | 16.6 | 166 | 10 | 100 | 40 | 400 | 13.3 | 133 |
螺紋規格 | Maximum nut torque required to move washer N·m | Maximum washer flatness allowance mm |
3/8-24 UNF-2A | 3 | 0.25 |
7/16-20 UNF-2A | 4 | 0.25 |
1/2-20 UNF-2A | 5 | 0.25 |
9/16-18 UNF-2A | 7 | 0.25 |
3/4-16 UNF-2A | 10 | 0.25 |
7/8-14 UNF-2A | 12 | 0.25 |
1 1/16-12 UN-2A | 15 | 0.4 |
1 3/16-12 UN-2A | 18 | 0.4 |
1 5/16-12 UN-2A | 20 | 0.4 |
1 5/8-12 UN-2A | 25 | 0.5 |
1 7/8-12 UN-2A | 30 | 0.5 |
2 1/2-12 UN-2A | 40 | 0.5 |
螺紋規格 | d8 | d9 | ||
Nom. | Tol. | Nom. | Tol. | |
3/8-24 UNF-2A | 7.65 | ±0.13 | 1.63 | ±0.08 |
7/16-20 UNF-2A | 9.17 | 1.83 | ||
1/2-20 UNF-2A | 10.52 | 1.83 | ||
9/16-18 UNF-2A | 11.89 | 1.98 | ||
3/4-16 UNF-2A | 16.36 | 2.21 | ||
7/8-14 UNF-2A | 19.18 | 2.46 | ||
1 1/16-12 UN-2A | 23.47 | ±0.15 | 2.95 | ±0.1 |
1 3/16-12 UN-2A | 26.62 | 2.95 | ||
1 5/16-12 UN-2A | 29.74 | 2.95 | ||
1 5/8-12 UN-2A | 37.47 | ±0.25 | 3 | |
1 7/8-12 UN-2A | 43.69 | 3 | ||
2 1/2-12 UN-2A | 59.36 | 3 |
螺紋 | 扭矩 / N·m (+10,0%) |
3/8-24 UNF-2A | 10 |
7/16-20 UNF-2A | 18 |
1/2-20 UNF-2A | 25 |
9/16-18 UNF-2A | 30 |
3/4-16 UNF-2A | 50 |
7/8-14 UNF-2A | 60 |
1 1/16-12 UN-2A | 95 |
1 3/16-12 UN-2A | 125 |
1 5/16-12 UN-2A | 150 |
1 5/8-12 UN-2A | 200 |
1 7/8-12 UN-2A | 210 |
2 1/2-12 UN-2A | 300 |
注:這些扭矩值僅用于測試。總成擰緊力矩取決于許多因素,包括潤滑、塗層和表面光潔度。應咨詢制造商。 |