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Click Specification

(Non-preferred) dimensions in parentheses.

Square Screw Nuts

BS 1981 - 1991

Display drawing:

英标BS 1981 - 1991 BS1981 1981BS Square Screw Nuts
Screw Thread
d
0# (1#) 2# (3#) 4# 5# 6# 8# 10# (12#) 1/4 5/16 3/8
PP UNC
UNF
s max
min
k max
min
- 64 56 48 40 40 32 32 24 24 20 18 16
80 72 64 56 48 44 40 36 32 28 28 24 24
0.156 0.156 0.187 0.187 0.25 0.312 0.312 0.344 0.375 0.437 0.437 0.562 0.625
0.15 0.15 0.18 0.18 0.241 0.302 0.302 0.332 0.362 0.423 0.423 0.545 0.607
0.05 0.05 0066 0.066 0.098 0.114 0.114 0.13 0.13 0.161 0.193 0.225 0.257
0.043 0.043 0.057 0.057 0.087 0.102 0.102 0.117 0.117 0.148 0.178 0.208 0.239

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