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National Stock Number:
5330-00-770-7520
Federal Supply Class:
5330
National Item Identification Number:
007707520
Description:
PACKING,PREFORMED
Detail:
A circular shaped item with an aperture manufactured to predetermined dimensions and designed for use as a seal in stuffing boxes, packing nuts, and the like. It may be (1) any nonmetallic molded or formed ring (except solid (without joint) rings having a square or rectangular cross section); or (2) any shredded metal or metal foil type metallic or semimetallic rings. Excludes felt items but includes multimaterial items in which one of the materials is felt. For solid (without joints) nonmetallic items with a square or rectangular cross section, see WASHER (as modified) and GASKET. For rubber items specifically designed for weather-proofing doors, windows, chests, and the like see SEAL, NONMETALLIC ANGLE; SEAL, NONMETALLIC CHANNEL; and SEAL, NONMETALLIC, SPECIAL SHAPED SECTION. For circular (with aperature) nonmetallic items with a solid round cross-section see O-RING. Excludes CUP, COMPRESSION; GASKET; WASHER (as modified); and FELT, MECHANICAL, PREFORMED.
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Manufacturer Information:
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Techincal Specification:
| ELONGATION PERCENTAGE | 125 MAXIMUM | | CENTER HOLE DIAMETER | 2.863 INCHES NOMINAL | | CRITICALITY CODE JUSTIFICATION | FEAT | | CROSS-SECTIONAL SHAPE STYLE | SQUARE/RECTANGULAR | | CROSS-SECTIONAL HEIGHT | 0.270 INCHES NOMINAL | | HARDNESS RATING | 75.0 SHORE DUROMETER A NOMINAL OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 3651 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | PLASTIC POLYTETRAFLUOROETHYLENE OVERALL | | PERIPHERAL DIAMETER | 3.130 INCHES NOMINAL | | SPECIAL FEATURES | DUE TO CRITICAL FEATURES, TOLERANCES, FIT RESTRICTIONS, MATERIAL PROPERTIES AND MANUFACTURING PROCESS. FAILURE COULD RESULT IN LOSS OR SUBSTANTIAL DAMAGE TO WEAPON SYSTEM, DEATH, OR SERIOUS INJURY | | TEMP RATING | -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT |
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