H = 0.866 025 404 P
5H/8 = 0.541 265 877 P
3H/8 = 0.324 759 526 P
H/4 = 0.216 506 351 P
H/8 = 0.108 253 175 P
D₂ = d₂ = d - 0.6495 P
D₁ = d₁ = d - 1.0825 P
公稱 直徑 D，d | 螺距 P | 基準平面内的直徑 | 基準距離b | 最小有效螺紋長度b | ||||
大徑 D，d | 中徑 D2，d2 | 小徑 D1，d1 | 标準型 L1 | 短型 L1短 | 标準型 L2 | 短型 L2短 | ||
| 8 | 1 | 8.000 | 7.350 | 6.917 | 5.500 | 2.500 | 8.000 | 5.500 |
| 10 | 1 | 10.000 | 9.350 | 8.917 | 5.500 | 2.500 | 8.000 | 5.500 |
| 12 | 1 | 12.000 | 11.350 | 10.917 | 5.500 | 2.500 | 8.000 | 5.500 |
| 14 | 1.5 | 14.000 | 13.026 | 12.376 | 7.500 | 3.500 | 11.000 | 8.500 |
| 16 | 1 | 16.000 | 15.350 | 14.917 | 5.500 | 2.500 | 8.000 | 5.500 |
| 16 | 1.5 | 16.000 | 15.026 | 14.376 | 7.500 | 3.500 | 11.000 | 8.500 |
| 20 | 1.5 | 20.000 | 19.026 | 18.376 | 7.500 | 3.500 | 11.000 | 8.500 |
| 27 | 2 | 27.000 | 25.701 | 24.835 | 11.000 | 5.000 | 16.000 | 12.000 |
| 33 | 2 | 33.000 | 31.701 | 30.835 | 11.000 | 5.000 | 16.000 | 12.000 |
| 42 | 2 | 42.000 | 40.701 | 39.835 | 11.000 | 5.000 | 16.000 | 12.000 |
| 48 | 2 | 48.000 | 46.701 | 45.835 | 11.000 | 5.000 | 16.000 | 12.000 |
| 60 | 2 | 60.000 | 58.701 | 57.835 | 11.000 | 5.000 | 16.000 | 12.000 |
| 72 | 3 | 72.000 | 70.051 | 68.752 | 16.500 | 7.500 | 24.000 | 18.000 |
| 76 | 2 | 76.000 | 74.701 | 73.835 | 11.000 | 5.000 | 16.000 | 12.000 |
| 90 | 2 | 90.000 | 88.701 | 87.835 | 11.000 | 5.000 | 16.000 | 12.000 |
| 90 | 3 | 90.000 | 88.051 | 86.752 | 16.500 | 7.500 | 24.000 | 18.000 |
| 115 | 2 | 115.000 | 113.701 | 112.835 | 11.000 | 5.000 | 16.000 | 12.000 |
| 115 | 3 | 115.000 | 113.051 | 111.752 | 16.500 | 7.500 | 24.000 | 18.000 |
| 140 | 2 | 140.000 | 138.701 | 137.835 | 11.000 | 5.000 | 16.000 | 12.000 |
| 140 | 3 | 140.000 | 138.051 | 136.752 | 16.500 | 7.500 | 24.000 | 18.000 |
| 170 | 3 | 170.000 | 168.051 | 166.752 | 16.500 | 7.500 | 24.000 | 18.000 |
a. 對圓錐螺紋，不同軸向位置平面内的螺紋直徑數值是不同的。要注意各直徑的軸向位置。
b. 基準距離有兩種型式：标準型和短型。兩種基準距離分别對應兩種型式的最小有效螺紋長度。标準型基準距離 L₁ 和标準型最小有效螺紋長度 L₂ 适用于由圓錐内螺紋與圓錐外螺紋組成的“錐/錐”配合螺紋；短型基準距離 L1短 和短型最小有效螺紋長度 L2短 适用于由圓柱内螺紋與圓錐外螺紋組成的“柱/錐”配合螺紋。選擇時要注意兩種配合形式對應兩組不同的基準距離和最小有效螺紋長度，避免選擇錯誤。
Locking threads with 30 degree wedge ramp
Miniature screw threads : Profiles , general plan and basic dimensions
General purpose metric screw threads - Tolerances
The blank diameters for rolling general purpose metric screw threads
Dryseal pipe threads with the thread angle of 60 degrees
Internal thread for wire thread inserts
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General purpose metric screw threads - Limits of sizes
Unified screw threads - General plan
Trapezoidal screw threads - Part 1: Profiles
General purpose metric screw threads - The plan for pipe systems
General purpose metric screw threads-Basic profile（ISO 68-1:1998, MOD）
General purpose metric screw threads - Basic dimenslons
General purpose metric screw threads - Limit deviations
General purpose metric screw threads - Preferable plan
General purpose metric screw threads - Limits of sizes for the screw threads of medium quality and preferable plan
General purpose metric screw threads - Limits of sizes for the screw threads of coarse quality and preferable plan
Tapping screws thread
Pipe Threads with 55 Degree Thread Angle where Pressure-Tight Joints are not Made on the Threads
Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads一 Parallel internal and taper external threads（eqv ISO 7-1:1994）
Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads一 Taper internal and external threads（eqv ISO 7-1:1994）
The interference-fit threads
Run-outs, undercuts and chamfers for general purpose metric screw threads (ISO 3508:1976 / ISO 4755:1983)
The threads for transition fit
Pipe threads where pressure-tight joints are made on the threads
Screws thread shanks for thread forming screw-Metric coarse thread series
Specification for wood screws
Metric triangle lock with thread end
Metric Self-tapping Thread End
Whitworth pipe threads for pipe unions
Plastic threads
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ISO - Metric Trapezoidal Screw Threads
Thread and thread ends for wood screws
Bolted Connections with Reduced Shank; Metric Thread with Large Clearence, Nominal Dimensions and Limits
Aerospace - Lead and runout threads - Part 1: Rolled external threads
ISO metric trapezoidal screw threads - Basic and design profiles
ISO general purpose metric screw threads - Tolerances - Part 1: Principles and basic data
Fasteners─Bolts,screws and studs─Nominal lengths and thread lengths
ISO inch screw threads─Basic dimensions
Pipe threads where pressure-tight joints are not made on the threads
Tapping Screws Thread
ISO general purpose metric screw threads - General plan
ISO general purpose metric screw threads — Selected sizes for screws, bolts and nuts
Limits of sizes for general purpose external and internal screw threads
Deviations for constructional screw threads
Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions, tolerances and designation
ISO general-purpose metric screw threads─Basic dimensions
HA Thread [Figure 2]
HB Thread [Figure 4]
Symmetrical thread HC [Figure 4]
Asymmetrical thread HD [Figure 6]
Tapping Screw Threads and Ends
Limit gauges for metric screw threads
Tapping screw threads and ends
Limits of sizes and tolerances for metric coarse screw threads
Tapping Screw Threads and Ends
Locking Thread with 30° wedge ramp
The bar diameters for rolling general purpose screw threads
Special kind of fine screw for optical instruments
Dimensions of Threads and Points for Type AB and Type ABR Thread-forming Screws
Dimensions of Threads and Points for Type B and BP Thread-Forming Tapping Screws
Dimensions of Threads and Points for Type A Thread-Forming Tapping Screws
Thread Lengths for Type A, AB, B, BF, BP and BT Tapping Screws
Thread Lengths for Type C, D, F, G, T and TRS Tapping Screws
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Lag screw threads [Table 16]
AB self-tapping teeth
self-tapping teeth-B
Self-tapping teeth-BF
Triangle lock self-tapping teeth--D、F、G
Threaded rods(inch series) (A307, F1554, A193, CRES,F593,F468)
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Wood thread [Table 1]
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Thread and body dimeters for wood screws [Table 1]
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Wood thread [Table 1]
Pipe threads where pressure tight joints are made on the threads - Part 1 : Taper external threads and parallel internal threads - Dimensions, tolerances and designation
US triangle lock thread-S type
Metric triangle lock thread-S type
Metric triangle lock thread-C type
Metric triangle lock thread-B type
Metric triangle lock thread-P type
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Thread and point details for Type Y thread cutting screws [TABLE 6]
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Thread and point details for Type A threads [TABLE 23]
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Thread Lengths for Types C, D, F, G, T, and TRS Tapping Screws
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Type AB, Thread Forming Tapping Screws [Table 5]
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Type B and BP, Thread Forming Tapping Screws [Table 6]
