| HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | GRADE B ALLOY STEEL PER OO-K-220 FED SPEC ALL MATERIAL RESPONSES AND ASTM A322 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 1335 OR STEEL COMP 4130 OR STEEL COMP 5130 OR STEEL COMP 8630 OVERALL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | KEY, MACHINE, SQUARE IN CROSS SECTION, BOTH ENDS SQUARE |
| OVERALL HEIGHT | 0.500 INCHES MINIMUM AND 0.501 INCHES MAXIMUM |
| OVERALL LENGTH | 4.49 INCHES MINIMUM AND 4.51 INCHES MAXIMUM |
| OVERALL WIDTH | 0.500 INCHES MINIMUM AND 0.501 INCHES MAXIMUM |
| SHEAR STRENGTH | 90000 SINGLE POUNDS PER SQUARE INCH |
| SPECIFICATION/STANDARD DATA | 80205-NAS-20066 NATIONAL STD/SPEC |
| STYLE DESIGNATOR | PLAIN |