5330-00-784-4141 PACKING,PREFORMED Index 4820-00-784-4143 DISK,VALVE

National Stock Number:
5330-00-784-4142

Federal Supply Class:
5330

National Item Identification Number:
007844142

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.


Manufacturer Information:
3132367PC1780064NAVAL SHIP SYSTEMS COMMAND
3600-124PC1796169ELECTRIC BOAT CORPORATION


Techincal Specification:
BODY RECESS DEPTH0.100 INCHES NOMINAL
CENTER HOLE DIAMETER5.781 INCHES MINIMUM AND 5.844 INCHES MAXIMUM
CROSS-SECTIONAL SHAPE STYLESPECIAL
CROSS-SECTIONAL HEIGHT0.342 INCHES MINIMUM AND 0.362 INCHES MAXIMUM
CROSS-SECTIONAL THICKNESS0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM
FLANGED BODY OUTSIDE DIAMETER6.312 INCHES NOMINAL
HARDNESS RATING80.0 SHORE DUROMETER A NOMINAL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-6855,CL 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
PERIPHERAL DIAMETER6.412 INCHES MINIMUM AND 6.432 INCHES MAXIMUM
RIM SURFACE WIDTH0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM


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