PartsTable
Technical Data Sheet
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77688 — GASKET

✓ Government record, cited
ZURU · ORING SEAL
PRODUCT OVERVIEW

77688: GASKET.

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This part is cataloged in the U.S. Government catalog under NSN 5330-00-303-9378, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
77688
NSN: 5330-00-303-9378
FSC: 5330 — Packing and Gasket Materials
CAGE: 00198 — PRATT & WHITNEY CANADA CORP DIV PRATT & WHITNEY CANADA CORP. (CAN)
SPECIFICATIONS
materialASBESTOS AND COPPER OVERALL
outside_diameter1.045 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter0.878 INCHES NOMINAL IN
fsc_application_dataENGINE,AIRCRAFT,RECIPROCATING
cross-sectional_thickness0.062 INCHES NOMINAL IN
cross-sectional_shape_styleMETAL WITH SOFT FILLER
NSN5330-00-303-9378
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 77688 MFR: ZURU ⚠ 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
•
FSC APPLICATION DATA: ENGINE,AIRCRAFT,RECIPROCATING
•
CROSS-SECTIONAL THICKNESS: 0.062 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: METAL WITH SOFT FILLER
•
OUTSIDE DIAMETER: 1.045 INCHES NOMINAL IN
•
APERTURE DIAMETER: 0.878 INCHES NOMINAL IN
•
MATERIAL: ASBESTOS AND COPPER OVERALL
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATAENGINE,AIRCRAFT,RECIPROCATING
CROSS-SECTIONAL THICKNESS0.062 INCHES NOMINAL IN
STYLE DESIGNATORCIRCULAR
CROSS-SECTIONAL SHAPE STYLEMETAL WITH SOFT FILLER
OUTSIDE DIAMETER1.045 INCHES NOMINAL IN
APERTURE DIAMETER0.878 INCHES NOMINAL IN
MATERIALASBESTOS AND COPPER OVERALL
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES 1
AS77688Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 77688?
77688 is a GASKET manufactured by ZURU.
What parts can replace 77688?
There is 1 known substitute for 77688: AS77688. Substitute compatibility should be verified for your specific system.
What is the NSN for 77688?
77688 is cataloged in the U.S. Government catalog under NSN 5330-00-303-9378. This indicates validated use in U.S. government and defense supply chains.
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