ASTM A325
Specification of heavy hex structural bolts intended for use in structural connections. All heavy hex bolts of 1 in. and smaller shall have a tensile strenght at a minimum of 120 kis. All heavy hex bolts of between 1 in. through 1-1/2 in. shall have a tensile strength at a minimum of 105 ksi.
Heavy hex structural bolts shall be fully threaded (with no shoulder) if the nominal length is equal to or shorter than 4 times the nominal bolt diameter.
| Types |
| Type 1 |
Medium carbon, carbon boron, or medium carbon alloy steel |
| Type 2 |
withdrawn November 1991 |
| T |
Fully threaded A325 (Restriced to 4X the Diameter in length) |
| M |
metric A325 |
| SC |
Slip critical connection |
| N |
Bearing type connection with threads included in the shear plane |
| X |
Bearing type connection with threads excluded from the shear plane |
| Size |
Tensile ksi |
Yield Ksi |
Elong. % min |
RA %, min |
| 1/2-1 |
120 min |
92 min |
14 |
35 |
| 1-1/8-1-1/2 |
105 min |
81 min |
14 |
35 |
| Nuts |
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Washers |
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| Type 1 |
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Type 3 |
Type 1 |
Type 3 |
| Plain |
Galvanized |
Plain |
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| A563C, C3, D, DH, DH3 |
A563DH |
A563C3, DH3 |
F436-1 |
f436-3 |
| Note: Nuts conforming to A194 Grade 2H are suitable for use with A325 heavy hex structural bolts. |
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