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QD660 ✓ 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: PAPER AND GLUE OVERALL, hole_diameter: 0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 10.375 INCHES NOMINAL IN, overall_length: 11.578 INCHES NOMINAL IN, special_features: THREE BOLT HOLES 0.281 IN. DIA; TWO BOLT HOLES 0.406 IN.

DIA; TWO BOLT HOLES 0.250 IN. DIA IN, bolt_hole_quantity: 10. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-776-8016, 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
QD660
NSN: 5330-00-776-8016
FSC: 5330
CAGE: 66289 — WISCONSIN MOTORS, LLC (USA)
SPECIFICATIONS
materialPAPER AND GLUE OVERALL
hole_diameter0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width10.375 INCHES NOMINAL IN
overall_length11.578 INCHES NOMINAL IN
special_featuresTHREE BOLT HOLES 0.281 IN. DIA; TWO BOLT HOLES 0.406 IN. DIA; TWO BOLT HOLES 0.250 IN. DIA IN
bolt_hole_quantity10
cross-sectional_thickness0.031 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationMIL-G-12803,NO. +3415-A MIL SPEC ALL MATERIAL RESPONSES OVERALL
NSN5330-00-776-8016
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: QD660 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
•
HOLE DIAMETER: 0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-12803,NO. +3415-A MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
BOLT HOLE QUANTITY: 10
•
MATERIAL: PAPER AND GLUE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
OVERALL WIDTH10.375 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-12803,NO. +3415-A MIL SPEC ALL MATERIAL RESPONSES OVERALL
BOLT HOLE QUANTITY10
MATERIALPAPER AND GLUE OVERALL
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
SPECIAL FEATURESTHREE BOLT HOLES 0.281 IN. DIA; TWO BOLT HOLES 0.406 IN. DIA; TWO BOLT HOLES 0.250 IN. DIA IN
OVERALL LENGTH11.578 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.031 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
36154Interchangeable
px2-300d 4TB
interchangeable
GT805H18-3AInterchangeable
interchangeable cross-reference
interchangeable
D15-561UPC484Interchangeable
interchangeable cross-reference
interchangeable
D15-619XPC289Interchangeable
interchangeable cross-reference
interchangeable
D15-561BPC484Interchangeable
interchangeable cross-reference
interchangeable
351-D-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is QD660?
QD660 is a GASKET.
What parts can replace QD660?
There are 13 known substitutes for QD660: 36154, GT805H18-3A, D15-561UPC484 and 10 more. Substitute compatibility should be verified for your specific system.
Is QD660 still available?
QD660 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026