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Technical Data Sheet
66B839 ✓ 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 PLATE,MENDING is a the manufacturer industrial component. Key specifications include overall_width: 0.500 INCHES NOMINAL IN, overall_length: 1.750 INCHES NOMINAL IN, material_thickness: 0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN, mounting_hole_type: PLAIN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-083-7952, 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
66B839
NSN: 5340-01-083-7952
FSC: 5340
CAGE: 97151 — AIR FORCE LIFECYCLE MANAGEMENT CENTER ELECTRONIC COMPONENTS (AFLCMC/EZSS) (USA)
SPECIFICATIONS
overall_width0.500 INCHES NOMINAL IN
overall_length1.750 INCHES NOMINAL IN
special_featuresONE SLOT 0.312 IN. LG BY 0.166 IN. MIN AND 0.169 IN. MAX WD; 1 HOLE 0.166 IN. MIN AND 0.169 IN. MAX DIA; MATERIAL PLASTIC POLYHEXAMETHYLENE ADIPAMIDE AND DISULFIDE MOLYBDENUM IN
material_thickness0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
mounting_hole_typePLAIN
NSN5340-01-083-7952
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 66B839 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
MATERIAL THICKNESS: 0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
MOUNTING HOLE TYPE: PLAIN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH0.500 INCHES NOMINAL IN
OVERALL LENGTH1.750 INCHES NOMINAL IN
MATERIAL THICKNESS0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN
SPECIAL FEATURESONE SLOT 0.312 IN. LG BY 0.166 IN. MIN AND 0.169 IN. MAX WD; 1 HOLE 0.166 IN. MIN AND 0.169 IN. MAX DIA; MATERIAL PLASTIC POLYHEXAMETHYLENE ADIPAMIDE AND DISULFIDE MOLYBDENUM IN
MOUNTING HOLE TYPEPLAIN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
2/1505Interchangeable
interchangeable cross-reference
interchangeable
FDE474 PAGE 7 ITEM 22Interchangeable
interchangeable cross-reference
interchangeable
02-1305-00Interchangeable
interchangeable cross-reference
interchangeable
21505Interchangeable
interchangeable cross-reference
interchangeable
EG-5Interchangeable
interchangeable cross-reference
interchangeable
918Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 66B839?
66B839 is a PLATE,MENDING.
What parts can replace 66B839?
There are 11 known substitutes for 66B839: 2/1505, FDE474 PAGE 7 ITEM 22, 02-1305-00 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 66B839?
66B839 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-083-7952. This indicates validated use in U.S. government and defense supply chains.
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