Preformed Packing Back-up Ring

Model / MPN: 8328805-12 | NSN: 5330-01-566-0385

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.

Product Details

NATO Stock Number

5330-01-566-0385

Sold in multiples of

1 EA

DEMIL

Cross Sectional Shape

Single turn spiral

Cross-sectional Height

Between 0.065 inches and 0.075 inches

Center Hole Diameter

Between 2.500 inches and 2.502 inches

Peripheral Diameter

Between 2.844 inches and 2.848 inches

End Application

Ssn 688 class submarine periscope hoist cylinder

Part Name Assigned By Controlling Agency

Retainer, packing, back-up

Material

Plastic polytetrafluoroethylene

8328805 Series Parts

8328805-12

Solicitations

Solicitation	Description	Qty	UOM	Close Date
SPE5EM20T5930	Up Ring, Prefor Back	151	EA	04/16/2020

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
7 Year Record Retention
On Time Delivery
HAZMAT Certified
Worldwide Shipping

8328805-12 Cross Reference

6640222-12