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PartsTable / COMPONENT / 6521-101A
6521-101A ✓ 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 material: ALUMINUM AND RUBBER SYNTHETIC OVERALL, hole_diameter: 0.490 INCHES MINIMUM AND 0.520 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 6.280 INCHES NOMINAL IN, overall_length: 7.120 INCHES NOMINAL IN, aperture_diameter: 3.730 INCHES NOMINAL IN, bolt_circle_diameter: 6.240 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 5330-00-014-6157, 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
6521-101A
NSN: 5330-00-014-6157
FSC: 5330
CAGE: 3DBN7 — KIRKHILL INC DIV KIRKHILL INC, HASKON DIVISION (USA)
SPECIFICATIONS
materialALUMINUM AND RUBBER SYNTHETIC OVERALL
hole_diameter0.490 INCHES MINIMUM AND 0.520 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
overall_width6.280 INCHES NOMINAL IN
overall_length7.120 INCHES NOMINAL IN
aperture_diameter3.730 INCHES NOMINAL IN
bolt_circle_diameter6.240 INCHES NOMINAL IN
outside_corner_radius0.440 INCHES NOMINAL IN
peripheral_flat_quantity6
NSN5330-00-014-6157
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6521-101A 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
•
BOLT CIRCLE DIAMETER: 6.240 INCHES NOMINAL IN
•
APERTURE DIAMETER: 3.730 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.490 INCHES MINIMUM AND 0.520 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
•
MATERIAL: ALUMINUM AND RUBBER SYNTHETIC OVERALL
•
PERIPHERAL FLAT QUANTITY: 6
•
OUTSIDE CORNER RADIUS: 0.440 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH6.280 INCHES NOMINAL IN
OVERALL LENGTH7.120 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER6.240 INCHES NOMINAL IN
APERTURE DIAMETER3.730 INCHES NOMINAL IN
HOLE DIAMETER0.490 INCHES MINIMUM AND 0.520 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
MATERIALALUMINUM AND RUBBER SYNTHETIC OVERALL
PERIPHERAL FLAT QUANTITY6
OUTSIDE CORNER RADIUS0.440 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
6521Interchangeable
interchangeable cross-reference
interchangeable
NR11121M1Interchangeable
interchangeable cross-reference
interchangeable
00044Interchangeable
interchangeable cross-reference
interchangeable
8Z-V8LR-B(P)Interchangeable
interchangeable cross-reference
interchangeable
ZV8LRBInterchangeable
interchangeable cross-reference
interchangeable
8Z-V8LR-BInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6521-101A?
6521-101A is a GASKET.
What parts can replace 6521-101A?
There are 16 known substitutes for 6521-101A: 6521, NR11121M1, 00044 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6521-101A?
6521-101A is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-014-6157. 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