BOLT,
| NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE | 80205 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.372 INCHES MINIMUM AND 0.510 INCHES MAXIMUM |
| FASTENER LENGTH | 1.578 INCHES MINIMUM AND 1.625 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| HEAD DIAMETER | 0.502 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
| SHOULDER DIAMETER | 0.280 INCHES MINIMUM FIRST SHOULDER AND 0.281 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 1.020 INCHES MINIMUM FIRST SHOULDER AND 1.042 INCHES MAXIMUM FIRST SHOULDER |
| INTERNAL DRIVE STYLE | HIGH-TORQUE |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM OVERALL AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| MATERIAL | STEEL COMP E4340 OVERALL OR STEEL COMP 4340 OVERALL OR STEEL COMP 8740 OVERALL OR STEEL COMP 8735 OVERALL OR STEEL COMP 6150 OVERALL OR STEEL COMP 4140 OVERALL OR STEEL COMP 4037 OVERALL OR STEEL COMP 4130 OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| THREAD SERIES DESIGNATOR | UNF |
| An externally threaded fastener whose threaded portion is of one nominal diameter, No ( . 6 IN.) (1.5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is designed to be driven with either a wrench or an inserted driver or both in sizes below No. 1 ( .19 IN.) (5 mm) nominal diameter. No. 1 ( .19 IN.) (5 mm) and larger sizes must be designed for any type of inserted driver, but may also provide for external wrenching of the head. A locking feature may be incorporated in the design of the head or threads. For items which are both shouldered and have an externally relieved body, use SCREW, EXTERNALLY RELIEVED BODY. For items with a No. 1 ( .19 IN.) (5 mm) or larger thread diameter without an inserted driver head, use BOLT, SHOULDER. Excludes BOLT, INTERNAL WRENCHING and SCREW, CAP, SOCKET HEAD. |
