5975-01-497-0989 MOUNTING BASE,ELECTRICAL EQUIPME Index 3040-01-497-0991 WEIGHT,COUNTERBALANCE

National Stock Number:
5330-01-497-0990

Federal Supply Class:
5330

National Item Identification Number:
014970990

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:
566-7067170-23253711NAVAL SEA SYSTEMS COMMAND
H625-0308-23296169ELECTRIC BOAT CORPORATION


Techincal Specification:
CENTER HOLE DIAMETER7.725 INCHES MINIMUM AND 7.730 INCHES MAXIMUM
CROSS-SECTIONAL HEIGHT0.990 INCHES NOMINAL
CROSS-SECTIONAL SHAPE STYLESQUARE/RECTANGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONASTM-D4020 UHMW-PE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALPLASTIC POLYETHYLENE OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYRING WEAR
PERIPHERAL DIAMETER8.260 INCHES MINIMUM AND 8.265 INCHES MAXIMUM
SPECIAL FEATURESHAS DIAGONAL RAZOR CUT


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