Page 1 of 2
REV-05
Fastenal Product Standard
Date: July 14, 2016
HHN.2H.HDG
Heavy Hex Nuts, ASTM A194 2H, Hot Dip Galvanized
The information below lists the required dimensional, chemical and physical characteristics of the products in this purchase order. If
the order received does not meet these requirements, it may result in a supplier corrective action request, which could jeopardize your
status as an approved vendor. Unless otherwise specified, all referenced consensus standards must be adhered to in their entirety.
Nominal
Size
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1 1/8
1 1/4
1 3/8
1 1/2
1 5/8
1 3/4
1 7/8
2
2 1/4
2 1/2
2 3/4
3
3 1/4
3 1/2
3 3/4
4
F
H
Width Across Flats
Thickness
Max.
Min.
Max.
.500
.488
.250
.562
.546
.314
.688
.669
.377
.750
.728
.441
.875
.850
.504
.938
.909
.568
1.062
1.031
.631
1.250
1.212
.758
1.438
1.394
.885
1.625
1.575
1.012
1.812
1.756
1.139
2.000
1.938
1.251
2.188
2.119
1.378
2.375
2.300
1.505
2.562
2.481
1.632
2.750
2.662
1.759
2.938
2.844
1.886
3.125
3.025
2.013
3.500
3.388
2.251
3.875
3.750
2.505
4.250
4.112
2.759
4.625
4.475
3.013
5.000
4.838
3.252
5.375
5.200
3.506
5.750
5.562
3.760
6.125
5.925
4.014
Dimensions above are prior to coating
Min.
.218
.280
.341
.403
.464
.526
.587
.710
.833
.956
1.079
1.187
1.310
1.433
1.556
1.679
1.802
1.925
2.155
2.401
2.647
2.893
3.124
3.370
3.616
3.862
Page 2 of 2
Fastenal Product Standard
Date: July 14, 2016
REV-05
HHN.2H.HDG
Specification Requirements:
•
•
Dimensions:
Material &
Mechanical Properties:
•
Thread Requirements:
•
Finish:
•
Product Marking:
•
Material Test Reports:
ASME B18.2.2
Grade 2H of ASTM A194/A194M. Sizes larger than 1-1/4” nominal
diameter shall be accepted if meeting the hardness requirement of 35
HRC (Max.) to 95 HRB (Min.), using the prescribed test method of
ASTM A370.
Thread dimensions and oversize tapping allowance
per ASTM A563.
Hot dip galvanize per ASTM F2329. Must meet supplemental
requirement S1 and S2 per ASTM A563. Test results to verify the
effectiveness of the lubricant shall be provided using SAE J174 using
hot dip galvanized A325 to a minimum clamp load of 84,000 PSI. The
maximum allowable torque tension K value shall be 0.18. Exception:
Test washers may be electroplated.
Manufacturer ID and 2HZN (or 2HBZN when
manufactured from bar stock)
The MTR must have documented lot traceability, dimensional
results, full chemical test results and full mechanical test results
to the specification(s) above. In addition, the MTR shall be in full
compliance with Fastenal’s MTR Requirements.