AS8791

AS8791 Preformed Packing Back-up Ring

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Datasheet. AS8791 specification

Cross-sectional Shape Style
The style designation indicating the configuration that most nearly corresponds to the cross-sectional shape of the item.

single turn spiral

Cross-sectional Height
A measurement from the bottom to the top of a cross section,in distinction from depth.

0.060in.

Center Hole Diameter
The length of a straight line which passes through the center of the center hole,and terminates at the circumference.

1.625in.

Peripheral Diameter

1.861in.

End Item Identification
The national stock number or the identification information of the end equipment for which the item is a part.

lift check valve

Special Features
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.

scaef cut 000 cut at angle 22-19 degrees; width 0.118in

Material
The chemical compound or mechanical mixture properties of which the item is fabricated.

plastic polytetrafluoroethylene

Material Document And Classification
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.

MIL-R-8791, -8791/1-223 mil spec single material response

Answers.

What quantity is this sold in?

1EA

What material is the preformed packing back-up ring made of ?

Plastic polytetrafluoroethylene

What is the NSN for AS8791?

5330-01-501-9995

What's the federal classification of AS8791?

FSC 5330 ⁓ Packing and gasket materials

Note-this fsc includes only seals and gaskets designed for standard use. seals, gaskets and packing are made from materials specifically designed and constructed to resist deterioration from the action of heat, gas, chemicals, liquids, and used to fill a cavity and create a tight seal. similar materials used to make seals, gaskets, and packing are available in bulk form, refer to fsg 93, fsg 80, and fsg 83.

Excluding 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.

NSN 5330-01-501-9995 BACK-UP RING,PREFORMED PACKING

Used on lift check valve. scaef cut 000 cut at angle 22-19 degrees; width 0.118in 1.625" center hole diameter

NIIN
015019995
NIIN Date
10/23/02
Schedule B
 
Name Code
66949
FIIG
A528B0
Item Weight
0.100lbs
Item Dimensions
--
QUP
Historical Price
$7.68 EA
DEMIL / ITAR
Uncontrolled item (Code A)
Hazmat
No hazard information available from HMIRS.
MSDS
N/A
Precious Metals
Metal content unknown
Enviromental
N/A
Electrostatic ESD & EMI
No ESD or EMI sensitivity

Other Part Numbers Parts with same form, fit, and function by other manufacturers

1. M8791/1-223 Cage 81343
2. M1420-3-EL Cage 0ASY6
3. MPL2532 PC 7 Cage 0ASY6

Major End Users Countries and entities

  • - Department of The Navy 
  • - Department of The Air Force 
  • - Spain 
  • - Canada 
  • - Republic of Korea 
  • - United Kingdom 

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Shipping Information

Special Handling
Other or no special handling required (sh) 
LTL (less than a truck load rating)
70.0 
LCL (less than a car load rating)
Unknown
Special Cargo
No special type of cargo code applicable 
Air Freight (Minimum cargo door size required)
Shipment is not a consolidation and does not exceed 84 inches in any dimension. 
Customs Requirement Classification
Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater 
Commodity (for shipments via water)
Gaskets, (machinery and parts),(less than 35 feet) 
NMFC (national motor freight code)
194050 GASKETS/RINGS PLUMBING FIXTURES 
UFC (universal freight code)
78100 

Similar by Design Other back-up rings with similar characteristics

Nothing similar to this part number was found in our inventory

AS8791 / Back-up ring,preformed packingWhat is the formal definition of this item?

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.