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Technical Data Sheet
PartsTable / COMPONENT / 1 1-4IN77GRADET
1 1-4IN77GRADET ✓ 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 PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, peripheral_diameter: 2.188 INCHES NOMINAL IN, center_hole_diameter: 1.375 INCHES NOMINAL IN, cross-sectional_height: 1.094 INCHES NOMINAL IN, cross-sectional_shape_style: SPECIAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-391-8481, 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
1 1-4IN77GRADET
NSN: 5330-00-391-8481
FSC: 5330
CAGE: 79154 — VICTAULIC COMPANY OF AMERICA INC DBA VICTAULIC COMPANY OF AMERICA (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
peripheral_diameter2.188 INCHES NOMINAL IN
center_hole_diameter1.375 INCHES NOMINAL IN
cross-sectional_height1.094 INCHES NOMINAL IN
cross-sectional_shape_styleSPECIAL
NSN5330-00-391-8481
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1 1-4IN77GRADET 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
•
PERIPHERAL DIAMETER: 2.188 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SPECIAL
•
CROSS-SECTIONAL HEIGHT: 1.094 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 1.375 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL DIAMETER2.188 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESPECIAL
CROSS-SECTIONAL HEIGHT1.094 INCHES NOMINAL IN
CENTER HOLE DIAMETER1.375 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
77A1-1/2INInterchangeable
interchangeable cross-reference
interchangeable
1025-30108 PC8Interchangeable
interchangeable cross-reference
interchangeable
77A1-1-2Interchangeable
interchangeable cross-reference
interchangeable
MIL-C-10387Interchangeable
interchangeable cross-reference
interchangeable
MILC10387BInterchangeable
interchangeable cross-reference
interchangeable
100SERIES4INGR00VETYPE2BUTYLInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1 1-4IN77GRADET?
1 1-4IN77GRADET is a PACKING,PREFORMED.
What parts can replace 1 1-4IN77GRADET?
There are 22 known substitutes for 1 1-4IN77GRADET: 77A1-1/2IN, 1025-30108 PC8, 77A1-1-2 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1 1-4IN77GRADET?
1 1-4IN77GRADET is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-391-8481. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026