Techincal Specification:
| MATERIAL | STEEL OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | HEAD STYLE | STRAIGHT PAN | | HEAD HEIGHT | 0.112 INCHES MINIMUM AND | | 0.127 INCHES MAXIMUM | | HEAD MAJOR DIAMETER | 0.829 INCHES MINIMUM AND | | 0.864 INCHES MAXIMUM | | SHANK STYLE | PIN-RIVET, STRAIGHT, THREADED | | FASTENER LENGTH | 2.3325 INCHES NOMINAL | | WIDTH BETWEEN FLATS | 0.2520 INCHES MINIMUM AND | | 0.2555 INCHES MAXIMUM | | SHANK DIAMETER | 0.5599 INCHES MINIMUM AND | | 0.5605 INCHES MAXIMUM | | GRIP LENGTH | 1.5625 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD SIZE | 0.5625 INCHES | | THREAD CLASS | 3A | | THREAD QUANTITY PER INCH | 18 | | THREAD DIRECTION | RIGHT-HAND | | LUBRICATION | CETYL ALCOHOL | | PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT, PROTRUDING HEAD |
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