6850-01-547-7676 LUBRICANT,GENERAL PURPOSE Index 1375-01-547-7678 FIRING DEVICE,DEMOLITION

National Stock Number:
5330-01-547-7677

Federal Supply Class:
5330

National Item Identification Number:
015477677

Description:
BACK-UP RING,PREFORMED PACKING

Detail:
A CIRCULAR SHAPED ITEM WITH AN APERTURE MANUFACTURED TO PREDETERMINED DIMENSIONS, CONSTRUCTED WITH A RECTANGULAR CROSS SECTION THAT MAY BE SOLID, WITH JOINT, OR IN A HELICAL FORM THAT FACILITATES SPIRAL WRAP INSTALLATION. IT PREVENTS SEAL EXTRUSION UNDER PRESSURE AND IS DESIGNED TO FIT ON THE DOWN-PRESSURE SIDE OF A GLAND GROOVE WITH A PACKING, PREFORMED OR O-RING.


Manufacturer Information:
21103941096169ELECTRIC BOAT CORPORATION
211039410CP03950NAVAL INVENTORY CONTROL POINT MECHANICSBURG
801-6408785 FIND NO 45CP03950NAVAL INVENTORY CONTROL POINT MECHANICSBURG
801-6408785 FIND NO 4553711NAVAL SEA SYSTEMS COMMAND


Techincal Specification:
CENTER HOLE DIAMETER2.875 INCHES NOMINAL
CRITICALITY CODE JUSTIFICATIONZZZY
CROSS-SECTIONAL HEIGHT0.050 INCHES MINIMUM AND 0.058 INCHES MAXIMUM
CROSS-SECTIONAL SHAPE STYLEDOUBLE SPIRAL
CROSS-SECTIONAL THICKNESS0.025 INCHES MINIMUM AND 0.029 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE
PERIPHERAL DIAMETER3.113 INCHES MINIMUM AND 3.117 INCHES MAXIMUM
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D


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