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This Standard covers the complete general and dimensional data for metric flat countersunk,oval countersunk and pan slotted and recessed head machine screws,and metric hex and hex flange head machine screws recognized as standard. Also included are appendices that provide specifications and instructions for protrusion gaging of flat countersunk head screws,across-corners gaging of hex head screws,and penetration gaging and wobble gaging of recessed head screws,and clearance hole recommendations.
ANSI B18.6.7M Hex Bolts are a type of fastener consisting of a head and a screw (a cylinder with an external thread), and a nut is required to fasten two parts with a through hole. They are commonly used in residential and commercial mechanical and construction projects. Full thread size provides excellent grip strength. Some thread sizes help where shear resistance is important. Secure with corresponding nuts or use in threaded holes. A type of fastener consisting of a head and a screw (a cylinder with an external thread), which requires a nut to securely connect two parts with a through hole.Because bolts are also a type of railway accessories, railway accessories are an integral part of railway lines. The track referred to here includes rails, sleepers, connectors, ballast beds, anti-climbing equipment, rail supports and turnouts.As an overall engineering structure, the track is laid on the roadbed, which guides the operation of the train and directly bears the huge pressure and load of the rolling stock. Under the power of train operation, its components must have sufficient strength and stability to ensure the safe, stable and uninterrupted operation of the train at the specified maximum speed.
nominal diameter d |
pitch P |
ds | s | k | |||
max | min | max | min | max. | min | ||
M2 | 0.4 | 2 | 1.65 | 3.2 | 3.02 | 1.6 | 1.3 |
M2.5 | 0.45 | 2.5 | 2.12 | 4 | 3.82 | 2.1 | 1.8 |
M3 | 0.5 | 3 | 2.58 | 5 | 4.82 | 2.3 | 2 |
M3.5 | 0.6 | 3.5 | 3 | 5.5 | 5.32 | 2.6 | 2.3 |
M4 | 0.7 | 4 | 3.43 | 7 | 6.78 | 3 | 2.6 |
M5 | 0.8 | 5 | 4.36 | 8 | 7.78 | 3.8 | 3.3 |
M6 | 1 | 6 | 5.21 | 10 | 9.78 | 4.7 | 4.1 |
M8 | 1.25 | 8 | 7.04 | 13 | 12.73 | 6 | 5.2 |
M10 | 1.5 | 10 | 8.86 | 15 | 14.73 | 7.5 | 6.5 |
M10 | 1.5 | 10 | 8.86 | 16 | 15.73 | 7.5 | 6.5 |
M12 | 1.75 | 12 | 10.68 | 18 | 17.73 | 9 | 7.8 |