| MATERIAL | STEEL COMP 8640 OR |
| STEEL COMP 8740 OR |
| STEEL COMP 4140 OR |
| STEEL COMP 4135 |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A322 ASSN STD 1ST MATERIAL RESPONSE OR |
| ASTM A331 ASSN STD 1ST MATERIAL RESPONSE OR |
| ASTM A331 ASSN STD 2ND MATERIAL RESPONSE OR |
| ASTM A322 ASSN STD 3RD MATERIAL RESPONSE OR |
| ASTM A331 ASSN STD 4TH MATERIAL RESPONSE |
| SURFACE TREATMENT | CADMIUM OVERALL |
| OVERALL LENGTH | 0.880 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| UNS STUD THREAD |
| NOMINAL THREAD SIZE | 0.250 INCHES NUT THREAD |
| 0.250 INCHES STUD THREAD |
| THREAD CLASS | 3A NUT THREAD |
| THREAD QUANTITY PER INCH | 28 NUT THREAD |
| 20 STUD THREAD |
| THREAD PITCH DIAMETERS | 0.2351 TO 0.2364 INCHES STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.380 INCHES MINIMUM NUT THREAD |
| 0.500 INCHES MINIMUM STUD THREAD |
| HARDNESS RATING | 28.0 ROCKWELL C MINIMUM AND |
| 34.0 ROCKWELL C MAXIMUM |
| DISTANCE FROM COTTER PIN HOLE CENTERLINE TO NUT END | 0.110 INCHES NOMINAL FIRST HOLE |
| COTTER PIN HOLE DIAMETER | 0.065 INCHES MINIMUM AND |
| 0.072 INCHES MAXIMUM FIRST HOLE |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 28839 |
| DESIGN CONTROL REFERENCE | 402711J |