| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.380 INCHES MINIMUM |
| FASTENER LENGTH | 2.300 INCHES MINIMUM AND |
| 2.310 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 1335 OR |
| STEEL COMP 1340 OR |
| STEEL COMP 4037 OR |
| STEEL COMP 4135 OR |
| STEEL COMP 8637 OR |
| STEEL COMP 8640 OR |
| STEEL COMP 8740 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A547 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| SURFACE TREATMENT | ZINC AND |
| CHROMATE OR |
| CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-Z-325,CL 2 FED SPEC 1ST TREATMENT RESPONSE AND |
| QQ-Z-325,CL 2 FED SPEC 2ND TREATMENT RESPONSE OR |
| QQ-P-416,CL 2 FED SPEC 3RD TREATMENT RESPONSE AND |
| QQ-P-416,CL 2 FED SPEC 4TH TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 322.0 BRINELL STANDARD MINIMUM AND |
| 363.0 BRINELL STANDARD MAXIMUM OVERALL |
| HEAD STYLE | FLAT CHAMFER |
| HEAD DIAMETER | 0.990 INCHES MINIMUM AND |
| 1.010 INCHES MAXIMUM |
| HEAD HEIGHT | 0.190 INCHES MINIMUM AND |
| 0.210 INCHES MAXIMUM |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER DIAMETER | 0.520 INCHES MINIMUM AND |
| 0.525 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 0.775 INCHES MINIMUM AND |
| 0.785 INCHES MAXIMUM FIRST SHOULDER |
| RIB QUANTITY | 35 |
| RIB MAJOR DIAMETER | 0.550 INCHES MINIMUM AND |
| 0.560 INCHES MAXIMUM |
| RIB LENGTH | 0.310 INCHES MINIMUM AND |
| 0.330 INCHES MAXIMUM |
| DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS | 0.050 INCHES MINIMUM AND |
| 0.070 INCHES MAXIMUM |
| FEATURES PROVIDED | CASEHARDENED |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 96906 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS51948-5 |