| MATERIAL | COPPER ALLOY OVERALL |
| FILLER METAL CHEMICAL COMPOSITION IN PERCENT | 57.00 COPPER MINIMUM AND |
| 63.00 COPPER MAXIMUM FIRST ELEMENT |
| 42.00 ZINC NOMINAL SECOND ELEMENT |
| 0.50 TIN MINIMUM AND |
| 1.50 TIN MAXIMUM THIRD ELEMENT |
| 0.750 IRON MINIMUM AND |
| 0.25 IRON MAXIMUM FOURTH ELEMENT |
| 0.05 LEAD MAXIMUM FIFTH ELEMENT |
| DEPOSITED FILLER METAL CHEMICAL COMPOSITION IN PERCENT | 100.00 NONIDENTIFIED ELEMENTS NOMINAL SINGLE ELEMENT |
| PHYSICAL FORM | STRAIGHT |
| LENGTH | 36.000 INCHES NOMINAL |
| SHAPE | ROUND |
| OUTSIDE DIAMETER | 0.250 INCHES NOMINAL |
| PROCESS TYPE FOR WHICH DESIGNED | GAS CARBON ARC OR |
| GAS TUNGSTEN ARC |
| WELD POSITION FOR WHICH DESIGNED | ALL POSITIONS |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND |
| FS-RCUZN-1 CLASS |
| DEPARTURE FROM CITED DESIGNATOR | AS MODIFIED BY CHEMICAL COMPOSITION PERCENTAGE |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81348 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | QQR571TYPE1CLASSFSRCUZN1 |