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Part Number

Part Number:
NSN:
NIIN:
Item Name:
BACK-UP RING , PREFORMED PACKING

Definition:

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.

CAGE Information

Code Company
09257 TRELLEBORG SEALING SOLUTIONS US INC.

Federal Supply Class

Title

PACKING AND GASKET MATERIALS

Inclusions:

INCLUDES GENERAL PURPOSE OIL GREASE, AIR, LIQUID, GAS, AND CHEMICAL SEALS; OAKUM; PREFABRICATED GASKETS AND SEALS DESIGNED FOR A SINGLE SPECIFIC APPLICATION.

Exclusions:

EXCLUDES O-RINGS (FSC 5331); BULK MATERIAL ITEMS, SUCH AS; RUBBER, CORK, AND ASBESTOS SHEETS AND STRIPS (FSG 93); LIQUID GASKET MATERIALS (RTV, PERMATEX, ETC.) (FSG 80); RFI AND EMI SEALS AND GASKETS (FSC 5999), AND ALL SEAL RETAINERS.

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
CXCY PART NAME ASSIGNED BY CONTROLLING AGENCY BACK-UP RING
MDCL MATERIAL DOCUMENT AND CLASSIFICATION TURCON 29 MFR REF SINGLE MATERIAL RESPONSE
ADYU PERIPHERAL DIAMETER 1.130 INCHES NOMINAL
MATT MATERIAL PLASTIC POLYTETRAFLUOROETHYLENE
ADYT CENTER HOLE DIAMETER 0.924 INCHES NOMINAL
ADVN CROSS-SECTIONAL HEIGHT 0.103 INCHES NOMINAL
AAGR CROSS-SECTIONAL SHAPE STYLE SINGLE TURN SPIRAL

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