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339-491 — MICROCIRCUIT,LINEAR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

339-491: MICROCIRCUIT,LINEAR.

The MICROCIRCUIT,LINEAR is a the manufacturer industrial component. Key specifications include body_width: 0.860 INCHES MAXIMUM IN, body_height: 0.260 INCHES MAXIMUM IN, body_length: 0.975 INCHES MAXIMUM IN, features_provided: ELECTROSTATIC SENSITIVE AND HYBRID AND HERMETICALLY SEALED AND BURN IN AND W/RESISTOR, inclosure_material: CERAMIC, storage_temp_range: -55.0 TO 125.0 CELSIUS DEGC. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-278-0290, 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
339-491
NSN: 5331-00-278-0290
NIINs: 002780290, 012838229
FSC: 5331 — O-ring
CAGE: 81306 — WHIRLPOOL CORP DBA WHIRLPOOL CORP (USA)
SPECIFICATIONS
body_width0.860 INCHES MAXIMUM IN
body_height0.260 INCHES MAXIMUM IN
body_length0.975 INCHES MAXIMUM IN
features_providedELECTROSTATIC SENSITIVE AND HYBRID AND HERMETICALLY SEALED AND BURN IN AND W/RESISTOR
inclosure_materialCERAMIC
storage_temp_range-55.0 TO 125.0 CELSIUS DEGC
test_data_document96906-MIL-STD-883 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
operating_temp_range+0.0 TO 75.0 CELSIUS DEGC
input_circuit_pattern1 INPUT
inclosure_configurationDUAL-IN-LINE
terminal_surface_treatmentSOLDER
design_function_and_quantity1 REGULATOR, VOLTAGE
NSN5331-00-278-0290
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 339-491 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 2
PL4377508 PAGE.3 NO. 41Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
690997Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 339-491?
339-491 is a MICROCIRCUIT,LINEAR.
What parts can replace 339-491?
There are 2 known substitutes for 339-491: PL4377508 PAGE.3 NO. 41, 690997. Substitute compatibility should be verified for your specific system.
What is the NSN for 339-491?
339-491 is cataloged in the U.S. Government catalog under NSN 5331-00-278-0290. 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.