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Technical Data Sheet
KEYBACK7 ✓ Verified by PartsTable
· ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The KEY CHAIN AND REEL is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: METAL A/A; CHROMIUM PLATED FIN EXC CRES; 21.75 IN. MIN LG CHAIN; PLATE TYPE MTG; CHUCK KEY BAND LOOP ATTACHMENT IN.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-789-2646, indicating validated use in U.S. government and defense logistics supply chains.

Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
KEYBACK7
NSN: 5340-00-789-2646
FSC: 5340
CAGE: 09981 — WEST COAST CHAIN MFG. CO. DBA KEY-BAK (USA)
SPECIFICATIONS
general_characteristics_item_descriptionMETAL A/A; CHROMIUM PLATED FIN EXC CRES; 21.75 IN. MIN LG CHAIN; PLATE TYPE MTG; CHUCK KEY BAND LOOP ATTACHMENT IN
NSN5340-00-789-2646
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: KEYBACK7 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
GENERAL CHARACTERISTICS ITEM DESCRIPTION: METAL A/A; CHROMIUM PLATED FIN EXC CRES; 21.75 IN. MIN LG CHAIN; PLATE TYPE MTG; CHUCK KEY BAND LOOP ATTACHMENT IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONMETAL A/A; CHROMIUM PLATED FIN EXC CRES; 21.75 IN. MIN LG CHAIN; PLATE TYPE MTG; CHUCK KEY BAND LOOP ATTACHMENT IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
A-A-1040Upgraded Successor
successor cross-reference
successor
RR-K-795Upgraded Successor
successor cross-reference
successor
KEYBAK5Upgraded Successor
successor cross-reference
successor
AA406Interchangeable
interchangeable cross-reference
interchangeable
A202Interchangeable
interchangeable cross-reference
interchangeable
KEYBAK3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is KEYBACK7?
KEYBACK7 is a KEY CHAIN AND REEL.
What parts can replace KEYBACK7?
There are 7 known substitutes for KEYBACK7: A-A-1040, RR-K-795, KEYBAK5 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for KEYBACK7?
KEYBACK7 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-789-2646. This indicates validated use in U.S. government and defense supply chains.
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