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Technical Data Sheet
40279-1 ✓ 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 TRANSISTOR is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 AND RUBBER FLUOROSILICONE CLASS FQ OVERALL, hole_diameter: 0.332 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 3.874 INCHES NOMINAL IN, overall_length: 0.170 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN, mounting_method: TERMINAL, terminal_length: 0.500 INCHES MINIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-118-1139, 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
40279-1
NSN: 5331-00-118-1139
FSC: 5331 — O-RING
CAGE: 12027 — KLINE MANUFACTURING CO INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 AND RUBBER FLUOROSILICONE CLASS FQ OVERALL
hole_diameter0.332 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width3.874 INCHES NOMINAL IN
overall_length0.170 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN
mounting_methodTERMINAL
terminal_length0.500 INCHES MINIMUM IN
outside_diameter2.609 INCHES MINIMUM AND 2.665 INCHES MAXIMUM IN
overall_diameter0.209 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
special_featuresJUNCTION PATTERN ARRANGEMENT: NPN
style_designatorNON-CIRCULAR
aperture_diameter2.437 INCHES NOMINAL IN
features_providedHERMETICALLY SEALED CASE
NSN5331-00-118-1139
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 40279-1 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 HEIGHT: 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
MATERIAL: RUBBER SYNTHETIC
CENTER HOLE DIAMETER: 2.220 INCHES MINIMUM AND 2.230 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC
CENTER HOLE DIAMETER2.220 INCHES MINIMUM AND 2.230 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
MS28775-229ESInterchangeable
interchangeable cross-reference
interchangeable
230079119Interchangeable
interchangeable cross-reference
interchangeable
ARP568-229MILP5 516BInterchangeable
interchangeable cross-reference
interchangeable
CA5306Interchangeable
interchangeable cross-reference
interchangeable
RT40279Interchangeable
interchangeable cross-reference
interchangeable
40279-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40279-1?
40279-1 is a TRANSISTOR.
What parts can replace 40279-1?
There are 8 known substitutes for 40279-1: MS28775-229ES, 230079119, ARP568-229MILP5 516B and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 40279-1?
40279-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-118-1139. This indicates validated use in U.S. government and defense supply chains.
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