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Technical Data Sheet
PartsTable / COMPONENT / 4993781
4993781 ✓ 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 SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC SEALING ELEMENT B, case_style: SQUARE, seal_width: 0.313 INCHES NOMINAL IN, temp_rating: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF, housing_bore_diameter: 1.686 INCHES NOMINAL IN, sealing_element_style: VERTICAL-ANGULAR. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-702-6769, 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
4993781
NSN: 5330-00-702-6769
FSC: 5330
CAGE: 0AHU0 — KALMAR AC INC (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC SEALING ELEMENT B
case_styleSQUARE
seal_width0.313 INCHES NOMINAL IN
temp_rating-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
housing_bore_diameter1.686 INCHES NOMINAL IN
sealing_element_styleVERTICAL-ANGULAR
accommodated_shaft_diameter1.250 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed3600 FEET PER MINUTE FT
NSN5330-00-702-6769
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4993781 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: RUBBER SYNTHETIC SEALING ELEMENT A
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 3600 FEET PER MINUTE FT
•
CASE STYLE: SQUARE
•
HOUSING BORE DIAMETER: 1.686 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: VERTICAL-ANGULAR
•
SEAL WIDTH: 0.313 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER SYNTHETIC SEALING ELEMENT A
ACCOMMODATED SHAFT MAXIMUM RATED SPEED3600 FEET PER MINUTE FT
MATERIALSTEEL CASE
MATERIALRUBBER SYNTHETIC SEALING ELEMENT B
CASE STYLESQUARE
HOUSING BORE DIAMETER1.686 INCHES NOMINAL IN
SEALING ELEMENT STYLEVERTICAL-ANGULAR
SEAL WIDTH0.313 INCHES NOMINAL IN
TEMP RATING-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
ACCOMMODATED SHAFT DIAMETER1.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
3531Interchangeable
interchangeable cross-reference
interchangeable
2382880Interchangeable
interchangeable cross-reference
interchangeable
2270606Interchangeable
interchangeable cross-reference
interchangeable
C65076Interchangeable
interchangeable cross-reference
interchangeable
23045Interchangeable
interchangeable cross-reference
interchangeable
382 10-32 UNF 0.812Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4993781?
4993781 is a SEAL,PLAIN ENCASED.
What parts can replace 4993781?
There are 8 known substitutes for 4993781: 3531, 2382880, 2270606 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4993781?
4993781 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-702-6769. 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.
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Last verified: July 2026