F3125 Marking Requirements & Matching Components
| 120ksi, Type 1 | 120ksi, Type 3 | 144ksi T-1 | 144ksi T-3 | 150ksi, Type 1 | 150ksi, Type 3 | |
|---|---|---|---|---|---|---|
| Marking | A325 | A325 | 144 | 144 | A490 | A490 |
| Nut, Plain | A563 DH | A563 DH3 | A563 DH | A563 DH3 | A563 DH | A563 DH3 |
| Nut, Coated | A563 DH | A563 DH3 | A563 DH | N/A | A563 DH | A563 DH3 |
| Washer | F436-1 | F436-3 | F436-1 | F436-3 | F436-1 | F436-3 |
| * A194 2H nuts are an acceptable substitute for A563 DH nuts * Suitable plain finish nut alternatives can be found in the full F3125 text * Supplementary requirements S1 and S2 have special marking requirements. | ||||||