MIL-HDBK-695 Rubber Products: Recommended Shelf LifeThis handbook provides guidance for establishing time periods for the expected life of elastomeric products during shelf storage. The use of the expected shelf storage lives listed herein is NOT MADE MANDATORY by this handbook. This handbook is for guidance only and cannot be cited as a requirement. The decision as to whether or not a product will have a limit placed upon the time that it may remain in storage is a function of the agency responsible for the products ultimate use.

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MIL-HDBK-695E

TABLE II. Documents - Continued.

National Aerospace Standards

Identifier

Title/Description

Elastomers

Expected

Shelf

Life (Yrs)

Required

Commonly

Used

NAS 1370 thru

NAS 1379

Duct, Air, Flexible, Helix Wire Supported

-65 to +275 ℉

-75 to +500 ℉

Fiberglass impreg with CR Fiberglass impreg with Q

NAS 1515

Washers - Plastic & Synthetic Rubber

Code Letter A Code Letter B Code Letter C Code Letter D Code Letter E Code Letter F Code Letter J Code Letter K Code Letter L Code Letter M

ZZ-R-765

CR IIR FKM FKM

NBR CR CR NBR

NAS 1593

Packing, Preformed - MIL-R-25897 Rubber, 75

Shore 0-Ring

FKM

NAS 1598

Washer - Sealing

Code Y Code R Code N

NBR FVMQ IIR

NASM 3036

Grommets, Rubber, Hot-0il And Coolant Resistant

SYN Q