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ASME B18.9 No 7 Reverse Key Round Countersunk

ASME B18.9 No 7 Reverse Key Round Countersunk

Dimensions of ASME B18.9 No 7 Reverse Key Round Countersunk Head Plow Bolts

Nominal or Basic Bolt Diameter, DDiameter of Full Size Body, EDiameter of Head, AMaximum Feed Thickness, FHead Height, SKey Length, G
MaxMinMaxMin. SharpABS Min with flatMaxMinMinMax
Regular Head
5/160.3120.2990.5920.5780.5630.0250.2330.2080.1850.2
3/80.3750.360.6610.640.6250.0310.2390.2080.1870.202
7/160.4380.4210.7760.7490.7340.0360.2820.2460.2270.242
1/20.50.4830.8920.8590.8440.0420.3280.2860.2670.282
9/160.5920.5441.0210.9840.9690.0450.3830.3880.3210.336
5/80.6570.6061.1211.0781.0630.050.4140.3640.3480.363
3/40.7820.7291.2771.2341.2190.050.440.390.390.39
Repair Head
5/160.3120.2990.5540.5460.5310.020.2010.1810.1580.173
3/80.3750.360.6230.6090.5940.0250.2070.1820.1580..173
7/160.4380.4210.7380.7180.7030.030.250.220.1990.214
1/20.50.4830.8530.8280.8130.0350.2950.260.2390.254
9/160.5920.5440.9840.9530.9380.040.3520.3120.2930.308
5/80.6570.6061.0771.0461.0310.040.3780.3380.3210.336
3/40.7820.7291.2341.2031.1880.040.4040.3640.3470.362

Notes :

  • Where specifying nominal size in decimals, zeros preceding the decimals and in the fourth decimal place shall be omitted.
  • This size is not recommended.
  • The letter “R” shall be shown on top of the repair head to distinguish it from the regular head bolt.