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PartsTable / COMPONENT / 787AS520
787AS520 ✓ 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 GASKET is a the manufacturer industrial component. Key specifications include overall_width: 34.750 INCHES NOMINAL IN, overall_length: 161.000 INCHES NOMINAL 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 5330-01-021-9056, 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
787AS520
NSN: 5330-01-021-9056
FSC: 5330
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
overall_width34.750 INCHES NOMINAL IN
overall_length161.000 INCHES NOMINAL IN
NSN5330-01-021-9056
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 787AS520 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
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH34.750 INCHES NOMINAL IN
OVERALL LENGTH161.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
10-006-2Interchangeable
interchangeable cross-reference
interchangeable
MN129Interchangeable
interchangeable cross-reference
interchangeable
7100614Interchangeable
interchangeable cross-reference
interchangeable
7351067Interchangeable
interchangeable cross-reference
interchangeable
755675Interchangeable
interchangeable cross-reference
interchangeable
BR10-450Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 787AS520?
787AS520 is a GASKET.
What parts can replace 787AS520?
There are 16 known substitutes for 787AS520: 10-006-2, MN129, 7100614 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 787AS520?
787AS520 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-021-9056. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026