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501491 — CIRCUIT CARD ASSEMBLY

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

501491: CIRCUIT CARD ASSEMBLY.

The CIRCUIT CARD ASSEMBLY is a the manufacturer industrial component. Key specifications include material: COPPER, construction: SOLID, overall_length: 3.250 INCHES NOMINAL IN, cross-sectional_height: 0.032 INCHES NOMINAL IN, mounting_configuration: TWO 0.350 IN. LG X 0.211 IN.

MIN W TO 0.217 IN. MAX W SLOTS SPACED 2.620 IN. C TO C IN, body_cross-sectional_shape: OBLONG.

This part is cataloged in the U.S. Government catalog under NSN 5330-00-423-9250, 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
501491
NSN: 5330-00-423-9250
NIINs: 004239250, 004731465, 013157474, 014211133
FSC: 5330 — Packing and Gasket Materials
CAGE: 95201 — NAPCO INTERNATIONAL LLC DBA NAPCO INTERNATIONAL INC (USA)
SPECIFICATIONS
materialCOPPER
constructionSOLID
overall_length3.250 INCHES NOMINAL IN
cross-sectional_height0.032 INCHES NOMINAL IN
mounting_configurationTWO 0.350 IN. LG X 0.211 IN. MIN W TO 0.217 IN. MAX W SLOTS SPACED 2.620 IN. C TO C IN
body_cross-sectional_shapeOBLONG
material_document_and_classificationQQ-C-576 FED SPEC SINGLE MATERIAL RESPONSE
NSN5330-00-423-9250
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 501491 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
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 501491?
501491 is a CIRCUIT CARD ASSEMBLY.
What is the NSN for 501491?
501491 is cataloged in the U.S. Government catalog under NSN 5330-00-423-9250. 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.