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Technical Data Sheet

18,77X1,78-24B7 — Technical Data Sheet

✓ 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 O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, outside_diameter: 0.864 INCHES MINIMUM AND 0.894 INCHES MAXIMUM IN, center_hole_diameter: 0.734 INCHES MINIMUM AND 0.744 INCHES MAXIMUM IN, cross-sectional_height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN, end_item_identification: MULTIPLE LAUNCH ROCKET SYSTEM (MLRS). This part is cataloged in the Federal Logistics Information System under NSN 5331-00-618-0799, 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
18,77X1,78-24B7
NSN: 5331-00-618-0799
FSC: 5331 — O-RING
CAGE: F8226 — STACEM (FRA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter0.864 INCHES MINIMUM AND 0.894 INCHES MAXIMUM IN
center_hole_diameter0.734 INCHES MINIMUM AND 0.744 INCHES MAXIMUM IN
cross-sectional_height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
end_item_identificationMULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
NSN5331-00-618-0799
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 18,77X1,78-24B7 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
•
CENTER HOLE DIAMETER: 0.734 INCHES MINIMUM AND 0.744 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.864 INCHES MINIMUM AND 0.894 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CENTER HOLE DIAMETER0.734 INCHES MINIMUM AND 0.744 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.864 INCHES MINIMUM AND 0.894 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 35
1740InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
762032PT175InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
71800InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
9146InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
PRP018C0MP7507InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AS5658-018InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 18,77X1,78-24B7?
18,77X1,78-24B7 is a O-RING.
What parts can replace 18,77X1,78-24B7?
There are 35 known substitutes for 18,77X1,78-24B7: 1740, 762032PT175, 71800 and 32 more. Substitute compatibility should be verified for your specific system.
Is 18,77X1,78-24B7 still available?
18,77X1,78-24B7 is currently cancelled.
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