| FASTENER LENGTH | 0.375 INCHES NOMINAL |
| HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.256 INCHES MINIMUM AND 0.273 INCHES MAXIMUM |
| HEAD HEIGHT | 0.072 INCHES MINIMUM AND 0.082 INCHES MAXIMUM |
| HEAD STYLE | PAN NO. 2 |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-634 FED SPEC 1ST MATERIAL RESPONSE OR 66 FED STD 2ND MATERIAL RESPONSE OR AISI/SAE ASSN STD 2ND MATERIAL RESPONSE OR 66 FED STD 3RD MATERIAL RESPONSE OR AISI/SAE ASSN STD 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE OR AISI/SAE ASSN STD 4TH MATERIAL RESPONSE OR 66 FED STD 5TH MATERIAL RESPONSE OR AISI/SAE ASSN STD 5TH MATERIAL RESPONSE OR 66 FED STD 6TH MATERIAL RESPONSE OR AISI/SAE ASSN STD 6TH MATERIAL RESPONSE OR 66 FED STD 7TH MATERIAL RESPONSE OR AISI/SAE ASSN STD 7TH MATERIAL RESPONSE OR 66 FED STD 8TH MATERIAL RESPONSE OR AISI/SAE ASSN STD 8TH MATERIAL RESPONSE OR 66 FED STD 9TH MATERIAL RESPONSE OR AISI/SAE ASSN STD 9TH MATERIAL RESPONSE OR 66 FED STD 10TH MATERIAL RESPONSE OR AISI/SAE ASSN STD 10TH MATERIAL RESPONSE OR 66 FED STD 11TH MATERIAL RESPONSE OR AISI/SAE ASSN STD 11TH MATERIAL RESPONSE OR 66 FED STD 12TH MATERIAL RESPONSE OR AISI/SAE ASSN STD 12TH MATERIAL RESPONSE OR 66 FED STD 13TH MATERIAL RESPONSE OR AISI/SAE ASSN STD 13TH MATERIAL RESPONSE OR QQ-S-626-CANC FED SPEC 14TH MATERIAL RESPONSE OR MIL-S-7952 MIL SPEC 15TH MATERIAL RESPONSE OR MIL-S-7952 MIL SPEC 16TH MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| PRIMARY WASHER MATERIAL THICKNESS | 0.031 INCHES NOMINAL |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.250 INCHES NOMINAL |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| SECONDARY WASHER MATERIAL THICKNESS | 0.016 INCHES NOMINAL |
| SECONDARY WASHER OUTSIDE DIAMETER | 0.258 INCHES NOMINAL |
| SECONDARY WASHER RELATIONSHIP TO PRIMARY WASHER | NOT IDENTICAL |
| SECONDARY WASHER STYLE | FLAT |
| SPECIAL FEATURES | LOCKWASHER AND WASHER NOT RATED SCREW 55000 LBS PER SQ IN. |
| SPECIFICATION/STANDARD DATA | 80205-NAS720 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| WASHER QUANTITY | 2 |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2 CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 2A |
| THREAD LENGTH | 0.282 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNC |
| THREAD QUANTITY PER INCH | 32 |