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National Stock Number:
5306-00-250-5487
Federal Supply Class:
5306
National Item Identification Number:
002505487
Description:
BOLT,INTERNALLY RELIEVED BODY
Detail:
An externally threaded fastener whose external threaded portion is of one nominal diameter. It has a concentric hole along the longitudinal centerline which may extend a part or the full length of the bolt. The concentric hole along the centerline may be counterbored and/or internally threaded at the head end or the bolt end. The head is designed to be held or driven by an external and/or internal driver. For items having a hole(s) perpendicular to the axis which meet the concentric hole along the longitudinal centerline, see BOLT, FLUID PASSAGE.
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Manufacturer Information:
| 8713862 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM |
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Techincal Specification:
| CONCENTRIC HOLE DEPTH | 1.187 INCHES NOMINAL | | CONCENTRIC HOLE DIAMETER | 0.312 INCHES NOMINAL | | FASTENER LENGTH | 3.093 INCHES NOMINAL | | HARDNESS RATING | 302.0 BRINELL STANDARD MINIMUM AND 341.0 BRINELL STANDARD MAXIMUM OVERALL | | HEAD HEIGHT | 1.938 INCHES NOMINAL | | HEAD STYLE | HEXAGON | | INTERNAL THREAD CLASS | 3B CONCENTRIC HOLE | | INTERNAL THREAD DIRECTION | RIGHT-HAND COUNTERBORE | | INTERNAL THREAD LENGTH | 0.875 INCHES NOMINAL COUNTERBORE | | MATERIAL | STEEL COMP 8637 OR STEEL COMP 8640 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL | | NOMINAL THREAD DIAMETER | 0.375 INCHES | | NOMINAL THREAD SIZE | 0.375 INCHES COUNTERBORE | | STYLE DESIGNATOR | COUNTERBORE THREADED | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.938 INCHES MINIMUM | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) | | THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) COUNTERBORE | | THREAD QUANTITY PER INCH | 16 | | THREADS PER INCH | 16 COUNTERBORE | | WIDTH BETWEEN FLATS | 0.562 INCHES NOMINAL |
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