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QD538A — GASKET

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

QD538A: GASKET.

The GASKET is a the manufacturer industrial component. Key specifications include hole_diameter: 0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 2.072 INCHES NOMINAL IN, overall_length: 2.500 INCHES NOMINAL IN, aperture_length: 1.250 INCHES NOMINAL IN, outside_corner_radius: 0.375 INCHES NOMINAL IN, cross-sectional_thickness: 0.016 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-146-4050, 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
QD538A
NSN: 5330-00-146-4050
FSC: 5330 — Packing and Gasket Materials
CAGE: 66289 — WISCONSIN MOTORS, LLC (USA)
SPECIFICATIONS
hole_diameter0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width2.072 INCHES NOMINAL IN
overall_length2.500 INCHES NOMINAL IN
aperture_length1.250 INCHES NOMINAL IN
bolt_hole_quantity2
outside_corner_radius0.375 INCHES NOMINAL IN
cross-sectional_thickness0.016 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
center_to_center_distance_between_bolt_holes_along_length1.750 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
NSN5330-00-146-4050
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: QD538A 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: 0.016 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
•
APERTURE LENGTH: 1.250 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 2
•
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH: 1.750 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
OUTSIDE CORNER RADIUS: 0.375 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.016 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
OVERALL LENGTH2.500 INCHES NOMINAL IN
OVERALL WIDTH2.072 INCHES NOMINAL IN
APERTURE LENGTH1.250 INCHES NOMINAL IN
BOLT HOLE QUANTITY2
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH1.750 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
OUTSIDE CORNER RADIUS0.375 INCHES NOMINAL IN
HOLE DIAMETER0.344 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
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 2
FP612Reference document
Same NSN cross-reference
Reference document — Secondary reference
3-16QD538A144Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is QD538A?
QD538A is a GASKET.
What parts can replace QD538A?
There are 2 known substitutes for QD538A: FP612, 3-16QD538A144. Substitute compatibility should be verified for your specific system.
What is the NSN for QD538A?
QD538A is cataloged in the U.S. Government catalog under NSN 5330-00-146-4050. 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.