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National Stock Number:
5310-01-330-8518
Federal Supply Class:
5310
National Item Identification Number:
013308518
Description:
WASHER,PRELOAD INDICATING
Detail:
AN ITEM ROUND IN SHAPE HAVING A CENTRALLY LOCATED HOLE. IT CONSISTS OF TWO CONCENTRIC (INNER AND OUTER) STEEL RINGS, THE INNER RING IS SMALLER IN DIAMETER AND HIGHER THAN THE OTHER. THESE RINGS ARE SANDWICHED BETWEEN TWO CLOSE TOLERANCE PLAIN WASHERS. AS THE ASSEMBLY IS TIGHTENED, THE INNER RING TAKES THE LOAD AND IS DEFORMED UNTIL THE LOOSE OUTER RING IS BOUND BETWEEN THE UPPER AND LOWER PLAIN WASHERS AND CANNOT BE MOVED. THE TIGHTENED LOAD IN THE BOLT IS EQUAL TO THE LOAD REQUIRED TO COMPRESS THE INNER RING. WHEN THE BINDING OF THE OUTER RING OCCURS AND CAN NOT BE MOVED, IT IS A SIGN THAT THE DESIRED LOAD HAS BEEN REACHED.
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Manufacturer Information:
| 03A279-6-124 | 76823 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | PLI22-6-12.4 | 80539 | SPS TECHNOLOGIES, LLC |
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Techincal Specification:
| BOLT MINIMUM TENSIL STRENGTH | 11160 POUNDS PER SQUARE INCH | | OUTSIDE DIAMETER | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM | | RECESS ANGLE | 120.0 DEGREES NOMINAL | | UNLOADED LENGTH | 0.296 INCHES MAXIMUM |
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