| MATERIAL | STEEL COMP 303 OR |
| STEEL COMP 303SE |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A582 ASSN STD ALL MATERIAL RESPONSES |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| STYLE DESIGNATOR | SELF-LOCKING |
| HEAD DIAMETER | 0.261 INCHES NOMINAL |
| HEAD LENGTH | 0.114 INCHES MINIMUM AND |
| 0.120 INCHES MAXIMUM |
| DISTANCE ACROSS FLATS | 0.297 INCHES MINIMUM AND |
| 0.327 INCHES MAXIMUM |
| OVERALL LENGTH | 1.000 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNC NUT THREAD |
| NOMINAL THREAD SIZE | 0.164 INCHES NUT THREAD |
| THREAD CLASS | 2A NUT THREAD |
| THREAD QUANTITY PER INCH | 16 NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD LENGTH | 1.000 INCHES NOMINAL NUT THREAD |
| LOCKING FEATURE | SELF-CLINCHING HEAD |
| HARDNESS RATING | 171.0 BRINELL STANDARD MINIMUM |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 81349 |
| NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MIL-S-63540/3-22-16 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | M63540/3-22-16 |