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Technical Data Sheet
127979R91 ✓ 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: LEATHER SEALING ELEMENT, case_style: SQUARE, seal_width: 0.250 INCHES NOMINAL IN, housing_bore_diameter: 2.497 INCHES MINIMUM AND 2.501 INCHES MAXIMUM IN, sealing_element_style: ANGULAR, accommodated_shaft_diameter: 1.562 INCHES MINIMUM AND 1.564 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-815-1113, 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
127979R91
NSN: 5330-00-815-1113
FSC: 5330
CAGE: 31007 — NAVISTAR INTERNATIONAL CORPORATION DBA NAVISTAR (USA)
SPECIFICATIONS
materialLEATHER SEALING ELEMENT
case_styleSQUARE
seal_width0.250 INCHES NOMINAL IN
housing_bore_diameter2.497 INCHES MINIMUM AND 2.501 INCHES MAXIMUM IN
sealing_element_styleANGULAR
accommodated_shaft_diameter1.562 INCHES MINIMUM AND 1.564 INCHES MAXIMUM IN
NSN5330-00-815-1113
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 127979R91 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
ACCOMMODATED SHAFT DIAMETER: 1.562 INCHES MINIMUM AND 1.564 INCHES MAXIMUM IN
MATERIAL: LEATHER SEALING ELEMENT
SEAL WIDTH: 0.250 INCHES NOMINAL IN
SEALING ELEMENT STYLE: ANGULAR
CASE STYLE: SQUARE
HOUSING BORE DIAMETER: 2.497 INCHES MINIMUM AND 2.501 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
ACCOMMODATED SHAFT DIAMETER1.562 INCHES MINIMUM AND 1.564 INCHES MAXIMUM IN
MATERIALLEATHER SEALING ELEMENT
SEAL WIDTH0.250 INCHES NOMINAL IN
MATERIALSTEEL CASE
SEALING ELEMENT STYLEANGULAR
CASE STYLESQUARE
HOUSING BORE DIAMETER2.497 INCHES MINIMUM AND 2.501 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
4715Interchangeable
interchangeable cross-reference
interchangeable
16780HInterchangeable
interchangeable cross-reference
interchangeable
2B4715Interchangeable
interchangeable cross-reference
interchangeable
1199900136Interchangeable
interchangeable cross-reference
interchangeable
GB-3Interchangeable
interchangeable cross-reference
interchangeable
30-318Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 127979R91?
127979R91 is a SEAL,PLAIN ENCASED.
What parts can replace 127979R91?
There are 15 known substitutes for 127979R91: 4715, 16780H, 2B4715 and 12 more. Substitute compatibility should be verified for your specific system.
Is 127979R91 still available?
127979R91 is currently cancelled.
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