| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.960 INCHES MINIMUM |
| FASTENER LENGTH | 1.420 INCHES NOMINAL |
| MATERIAL | STEEL COMP 1018 OR |
| STEEL COMP 1019 OR |
| STEEL COMP 1020 OR |
| STEEL COMP 1022 OR |
| STEEL COMP 1023 OR |
| STEEL COMP 1025 OR |
| STEEL COMP 1026 OR |
| STEEL COMP 1029 OR |
| STEEL COMP 1030 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-634 FED SPEC 1ST MATERIAL RESPONSE OR |
| QQ-S-634 FED SPEC 2ND MATERIAL RESPONSE OR |
| QQ-S-634 FED SPEC 3RD MATERIAL RESPONSE OR |
| QQ-S-634 FED SPEC 4TH MATERIAL RESPONSE OR |
| QQ-S-631 FED SPEC 5TH MATERIAL RESPONSE OR |
| QQ-S-634 FED SPEC 6TH MATERIAL RESPONSE OR |
| QQ-S-634 FED SPEC 7TH MATERIAL RESPONSE OR |
| QQ-S-631 FED SPEC 8TH MATERIAL RESPONSE OR |
| QQ-S-631 FED SPEC 9TH MATERIAL RESPONSE OVERALL |
| HARDNESS RATING | 170.0 BRINELL STANDARD MINIMUM AND |
| 248.0 BRINELL STANDARD MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 110000 POUNDS PER SQUARE INCH |
| HEAD STYLE | PAN NO. 2 |
| HEAD DIAMETER | 0.820 INCHES NOMINAL |
| HEAD HEIGHT | 0.160 INCHES NOMINAL |
| SHOULDER SHAPE | RIBBED FIRST SHOULDER |
| SHOULDER DIAMETER | 0.6020 INCHES MINIMUM AND |
| 0.6050 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 0.340 INCHES MINIMUM AND |
| 0.350 INCHES MAXIMUM FIRST SHOULDER |
| RIB QUANTITY | 39 |
| RIB MAJOR DIAMETER | 0.618 INCHES MINIMUM AND |
| 0.628 INCHES MAXIMUM |
| RIB LENGTH | 0.120 INCHES NOMINAL |
| DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS | 0.060 INCHES NOMINAL |
| FEATURES PROVIDED | CASEHARDENED |