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Technical Data Sheet
GF820B4B4 ✓ 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 FERRULE,GROOVED CLAMP COUPLING is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-395-7957, 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
GF820B4B4
NSN: 5340-01-395-7957
FSC: 5340
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
Part NumberGF820B4B4
NSN5340-01-395-7957
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: GF820B4B4 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
19882Interchangeable
interchangeable cross-reference
interchangeable
10225895Interchangeable
interchangeable cross-reference
interchangeable
1988B0Interchangeable
interchangeable cross-reference
interchangeable
84-53977Interchangeable
interchangeable cross-reference
interchangeable
A3145330Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GF820B4B4?
GF820B4B4 is a FERRULE,GROOVED CLAMP COUPLING.
What parts can replace GF820B4B4?
There are 5 known substitutes for GF820B4B4: 19882, 10225895, 1988B0 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GF820B4B4?
GF820B4B4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-395-7957. This indicates validated use in U.S. government and defense supply chains.
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