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National Stock Number:
5330-01-577-9528
Federal Supply Class:
5330
National Item Identification Number:
015779528
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:
| 4274P04A9067L | 30781 | PARKER-HANNIFIN CORPORATION | | W28749 | 30781 | PARKER-HANNIFIN CORPORATION |
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Techincal Specification:
| CENTER HOLE DIAMETER | 7.500 INCHES MINIMUM AND 7.582 INCHES MAXIMUM | | CROSS-SECTIONAL SHAPE STYLE | U WITH O-RING | | CROSS-SECTIONAL HEIGHT | 0.533 INCHES MINIMUM AND 0.573 INCHES MAXIMUM | | HARDNESS RATING | 85.0 SHORE DUROMETER A NOMINAL PACKING | | MATERIAL DOCUMENT AND CLASSIFICATION | PARKER ENGINEERED POLYMER SYSTEMS (30781) 4274A85 MFR REF SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | RUBBER CARBOXYLIC-NITRILE-BUTADIENE CLASS XNBR PACKING | | MATERIAL | STEEL COMP 302 INSERT | | PART NAME ASSIGNED BY CONTROLLING AGENCY | CUSTOM DEEP POLYPAK | | PERIPHERAL DIAMETER | 8.250 INCHES NOMINAL | | PROPRIETARY CHARACTERISTICS | PACS | | SPECIAL FEATURES | THE DIFFERENCE IN THIS PART IS THE GROOVE IN THE POLYPAK SHELL HAS BEEN DESIGNED TO ACCEPT THE SLANT -COIL SPRING. THE SLANT -COIL SPRING IS OVAL IN SHAPE WHERE THE GROOVE FOR THE SAME POLYPAK WOULD HAVE A GROOVE FOR AN O-RING (O-SPRING) WHICH IS ROUND IN SHAPE NOT OVAL TO MATCH THE SPRING. |
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