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hexagon socket head Shoulder screws, BSW/BSF Thread BS 2470

Shoulder Screws BSW & BSF Thread

Dimensions of hexagon socket head Shoulder screws, BSW/BSF Thread BS 2470

Nominal SizeDAHSBTJK
Shoulder DiameterHead DiameterHead HeightHead Side HeightNominal thread SizeThread lengthHexagon socket size*Key Engagement
Max.Min.Max.Min.Max.Min.Min. Max.Min.Nom.Min.
1/40.24800.24600.3750.3570.1880.1820.157†No.10 or 3/160.3750.3551/80.094
5/160.31050.30850.4380.4190.2190.2130.1830.1/40.4380.4185/320.117
3/80.37300.37100.5630.5430.2500.2440.2095/160.5000.4803/160.141
1/20.49800.49600.7500.7290.3130.3060.2623/80.6250.5951/40.188
5/80.62300.62100.8750.8530.3750.3680.3151/20.7500.7205/160.234
3/40.74800.74601.0000.9770.5000.4920.4215/80.8750.8453/80.281

* See 2.12 and Table 7 for limits of size.
† 3/16 size apllies to BSW or BSF; No 10 size applies to UNC, All other
sizes apply to BSW, BSF and UNC.

Nominal SizeGIEFNM
Thread Neck DiameterThread Neck WidthShoulder Neck DiameterShoulder Neck WidthThread Neck FilletHead Fillet (Above body)
BSW/UNCBSF
Max.Min.Max.Min.Max.Min.Max.Max.Min.Max.Min.
1/40.1220.1170.1370.1320.0830.2270.0930.0230.0170.0140.009
5/160.1740.1690.1900.1850.1000.2890.0930.0280.0220.0170.012
3/80.2280.2230.2420.2360.1110.3520.0930.0310.0250.0200.015
1/20.2810.2750.2990.2930.1250.4770.0930.0350.0290.0260.020
5/80.3770.3710.4060.3990.1540.6020.0930.0420.0360.0320.024
3/40.4930.4860.5180.5110.1820.7270.0930.0510.0450.0390.030