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QD527B — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

QD527B: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include end_item_name: RELIEF VALVE, hole_diameter: 0.437 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, outside_diameter: 7.500 INCHES NOMINAL IN, special_features: CAVITY THREAD SIZE 7/8-14; 2-WAY CABVITY; BUNA N SEAL ; O-RING TOWARD BOTTOM OF CAVITY, aperture_diameter: 5.531 INCHES NOMINAL IN, bolt_circle_diameter: 6.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-146-3672, 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
QD527B
NSN: 5330-00-146-3672
NIINs: 001463672, 013653773
FSC: 5330 — Packing and Gasket Materials
CAGE: 66289 — WISCONSIN MOTORS, LLC (USA)
SPECIFICATIONS
end_item_nameRELIEF VALVE
hole_diameter0.437 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
outside_diameter7.500 INCHES NOMINAL IN
special_featuresCAVITY THREAD SIZE 7/8-14; 2-WAY CABVITY; BUNA N SEAL ; O-RING TOWARD BOTTOM OF CAVITY
aperture_diameter5.531 INCHES NOMINAL IN
bolt_hole_quantity6
bolt_circle_diameter6.500 INCHES NOMINAL IN
cross-sectional_thickness0.007 INCHES MINIMUM AND 0.008 INCHES MAXIMUM IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
NSN5330-00-146-3672
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: QD527B 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
•
CROSS-SECTIONAL THICKNESS: 0.007 INCHES MINIMUM AND 0.008 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
OUTSIDE DIAMETER: 7.500 INCHES NOMINAL IN
•
APERTURE DIAMETER: 5.531 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 6
•
BOLT CIRCLE DIAMETER: 6.500 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.437 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.007 INCHES MINIMUM AND 0.008 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OUTSIDE DIAMETER7.500 INCHES NOMINAL IN
APERTURE DIAMETER5.531 INCHES NOMINAL IN
BOLT HOLE QUANTITY6
BOLT CIRCLE DIAMETER6.500 INCHES NOMINAL IN
HOLE DIAMETER0.437 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is QD527B?
QD527B is a GASKET.
What is the NSN for QD527B?
QD527B is cataloged in the U.S. Government catalog under NSN 5330-00-146-3672. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.