| THREAD SERIES DESIGNATOR | UNC |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | FED-STD-66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | OXIDE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MS24639 MIL STD SINGLE TREATMENT RESPONSE OVERALL |
| COLOR | BLACK OVERALL |
| MINIMUM TENSILE STRENGTH | 1400 POUNDS PER SQUARE INCH |
| LOCKING FEATURE | PATCH LOCKING FEATURE |
| SPECIAL FEATURES | 24 THREADS PER INCH; SCREW DIAMETER 0.190"; HEAD DIAMETER 0.385"MAX/0.359"MIN.; GAGING DIAMETER 0.307"; HEAD HEIGHT 0.083"; FILLET RADIUS 0.020"MAX 0.010"MIN; LENGTH 5/16"NOMINAL |
| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| CRITICALITY CODE JUSTIFICATION | ZZZY |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 94271 |
| DESIGN CONTROL REFERENCE | 115387-24693-C69 |