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187-8961 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

187-8961: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include special_features: BOLT-ON, SINGLE LIP, fsc_application_data: CRANKSHAFT REAR, end_item_identification: DIESEL ENGINE, reference_data_and_literature: BASIC ENGINE 187-6508 SEAL GP-CRANKSHAFT, DRY FLYWHEEL HOUSING, SMCS-1160,1161, I01877837, REF NO. 3.

This part is cataloged in the U.S. Government catalog under NSN 5330-01-541-4292, 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
187-8961
NSN: 5330-01-541-4292
FSC: 5330 — Packing and Gasket Materials
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
special_featuresBOLT-ON, SINGLE LIP
fsc_application_dataCRANKSHAFT REAR
end_item_identificationDIESEL ENGINE
reference_data_and_literatureBASIC ENGINE 187-6508 SEAL GP-CRANKSHAFT, DRY FLYWHEEL HOUSING, SMCS-1160,1161, I01877837, REF NO. 3
NSN5330-01-541-4292
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 187-8961 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
•
FSC APPLICATION DATA: CRANKSHAFT REAR
•
REFERENCE DATA AND LITERATURE: BASIC ENGINE 187-6508 SEAL GP-CRANKSHAFT, DRY FLYWHEEL HOUSING, SMCS-1160,1161, I01877837, REF NO. 3
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATACRANKSHAFT REAR
REFERENCE DATA AND LITERATUREBASIC ENGINE 187-6508 SEAL GP-CRANKSHAFT, DRY FLYWHEEL HOUSING, SMCS-1160,1161, I01877837, REF NO. 3
SPECIAL FEATURESBOLT-ON, SINGLE LIP
END ITEM IDENTIFICATIONDIESEL ENGINE
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 187-8961?
187-8961 is a SEAL,PLAIN ENCASED.
What is the NSN for 187-8961?
187-8961 is cataloged in the U.S. Government catalog under NSN 5330-01-541-4292. 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.