Formerly Emhart Teknologies & Infastech

Fractional Hex Flange Nuts

Standard Spiralock nuts are SAE Grade 8 equivalent and designed to mate with standard 2A, 3A, and UNJ class of fit bolts. Spiralock nuts dimensionally conform to IFI standards. Our standard plating is clear zinc chromate. Other nut styles, platings, and materials are available upon request.

Fractional Hex Flange Nuts

Nominal Nut Size EDP #   A
Flange Dia.
B
Across Flats
C
Across Corners
D
Nut Thickness
E
Minimum Flange Edge Thickness
1/4 - 20 F04200M Max. Min. 0.594 0.574 0.438 0.428 0.505
0.488
0.236
0.222
0.040
1/4 - 28 F04280M
5/16 - 18 F05180M Max. Min. 0.680 0.660 0.500 0.489 0.577
0.557
0.283
0.268
0.040
5/16 – 24 F05240M
3/8 – 16 F06160M Max. Min. 0.750 0.728 0.562 0.551 0.650
0.628
0.347
0.330
0.040
3/8 – 24 F06240M
7/16 – 14 F07140M Max. Min. 0.937 0.910 0.688 0.675 0.794
0.768
0.395
0.375
0.040
7/16 – 20 F07200M
1/2 - 13 F08130M Max. Min. 1.031 1.000 0.750 0.736 0.866
0.840
0.458
0.437
0.050
1/2 - 20 F08200M
9/16 – 12 F09120M Max. Min. 1.188 1.155 0.875 0.861 1.010
0.982
0.506
0.483
0.050
9/16 –18 F09180M
5/8 – 11 F10110M Max. Min. 1.281 1.248 0.938 0.922 1.083
1.051
0.569
0.545
0.050
5/8 – 18 F10180M
3/4 - 10 F12100M Max. Min. 1.500 1.460 1.125 1.088 1.299
1.240
0.675
0.627
0.060
3/4 - 16 F12160M
7/8 – 9 F14090M Max. Min. 1.750 1.706 1.312 1.269 1.515
1.446
0.788
0.735
0.070
7/8 – 14 F14140M
1 – 8 F16080M Max. Min. 2.000 1.950 1.500 1.450 1.732
1.653
0.900
0.850
0.080
1 – 12 F16120M