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Technical Data Sheet

R9995/187 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

R9995/187: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 CASE, case_style: SQUARE, seal_width: 0.438 INCHES NOMINAL IN, outside_diameter: 3.756 INCHES NOMINAL IN, surface_treatment: PLASTIC CASE, housing_bore_diameter: 3.751 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-498-5061, 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
R9995/187
NSN: 5330-01-498-5061
FSC: 5330 — Packing and Gasket Materials
CAGE: K0192 — SPICER SPECIALITY AXLE DIVISION (GBR)
SPECIFICATIONS
materialSTEEL COMP 304 CASE
case_styleSQUARE
seal_width0.438 INCHES NOMINAL IN
outside_diameter3.756 INCHES NOMINAL IN
surface_treatmentPLASTIC CASE
housing_bore_diameter3.751 INCHES NOMINAL IN
sealing_element_styleANGULAR
end_item_identificationTRUCK TRACTOR,2320-01-452-5579
accommodated_shaft_diameter2.750 INCHES NOMINAL IN
NSN5330-01-498-5061
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: R9995/187 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
•
SEAL WIDTH: 0.438 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: ANGULAR
•
OUTSIDE DIAMETER: 3.756 INCHES NOMINAL IN
•
HOUSING BORE DIAMETER: 3.751 INCHES NOMINAL IN
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT DIAMETER: 2.750 INCHES NOMINAL IN
•
SURFACE TREATMENT: PLASTIC CASE
TECHNICAL CHARACTERISTICS
SEAL WIDTH0.438 INCHES NOMINAL IN
SEALING ELEMENT STYLEANGULAR
OUTSIDE DIAMETER3.756 INCHES NOMINAL IN
HOUSING BORE DIAMETER3.751 INCHES NOMINAL IN
CASE STYLESQUARE
ACCOMMODATED SHAFT DIAMETER2.750 INCHES NOMINAL IN
SURFACE TREATMENTPLASTIC CASE
END ITEM IDENTIFICATIONTRUCK TRACTOR,2320-01-452-5579
MATERIALRUBBER FLUOROCARBON CLASS FPM SEALING ELEMENT
MATERIALSTEEL COMP 304 CASE
SUBSTITUTES & CROSS-REFERENCES 1
CR544051-85Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is R9995/187?
R9995/187 is a SEAL,PLAIN ENCASED.
What parts can replace R9995/187?
There is 1 known substitute for R9995/187: CR544051-85. Substitute compatibility should be verified for your specific system.
What is the NSN for R9995/187?
R9995/187 is cataloged in the U.S. Government catalog under NSN 5330-01-498-5061. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.