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PartsTable / COMPONENT / SM-C-850474-2
SM-C-850474-2 ✓ 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

CAP-PLUG,PROTECTIVE,DUST AND MOI. Key specifications include material: PLASTIC, POLYETHYLENE (PP), length_under_shoulder: 2.634 INCHES MINIMUM AND 2.654 INCHES MAXIMUM IN, open_end_inside_diameter: 2.408 INCHES MINIMUM AND 2.428 INCHES MAXIMUM IN, closed_end_overall_diameter: 2.644 INCHES NOMINAL IN, material_document_and_classification: L-P-390, TYPE 1, GRADE 1, CLASS L FED SPEC SINGLE MATERIAL RESPONSE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-048-1341, 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
SM-C-850474-2
NSN: 5340-01-048-1341
FSC: 5340
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialPLASTIC, POLYETHYLENE (PP)
length_under_shoulder2.634 INCHES MINIMUM AND 2.654 INCHES MAXIMUM IN
open_end_inside_diameter2.408 INCHES MINIMUM AND 2.428 INCHES MAXIMUM IN
closed_end_overall_diameter2.644 INCHES NOMINAL IN
material_document_and_classificationL-P-390, TYPE 1, GRADE 1, CLASS L FED SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-048-1341
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SM-C-850474-2 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: PLASTIC, POLYETHYLENE (PP)
•
OPEN END INSIDE DIAMETER: 2.408 INCHES MINIMUM AND 2.428 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: L-P-390, TYPE 1, GRADE 1, CLASS L FED SPEC SINGLE MATERIAL RESPONSE
•
CLOSED END OVERALL DIAMETER: 2.644 INCHES NOMINAL IN
•
LENGTH UNDER SHOULDER: 2.634 INCHES MINIMUM AND 2.654 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALPLASTIC, POLYETHYLENE (PP)
OPEN END INSIDE DIAMETER2.408 INCHES MINIMUM AND 2.428 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONL-P-390, TYPE 1, GRADE 1, CLASS L FED SPEC SINGLE MATERIAL RESPONSE
CLOSED END OVERALL DIAMETER2.644 INCHES NOMINAL IN
LENGTH UNDER SHOULDER2.634 INCHES MINIMUM AND 2.654 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
NAS847Upgraded Successor
successor cross-reference
successor
MIL-C-5501/7Upgraded Successor
successor cross-reference
successor
M5501/7-F24Upgraded Successor
successor cross-reference
successor
17SUpgraded Successor
successor cross-reference
successor
194Upgraded Successor
successor cross-reference
successor
TC15-1714Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SM-C-850474-2?
SM-C-850474-2 is a CAP-PLUG,PROTECTIVE,DUST AND MOI.
What parts can replace SM-C-850474-2?
There are 25 known substitutes for SM-C-850474-2: NAS847, MIL-C-5501/7, M5501/7-F24 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SM-C-850474-2?
SM-C-850474-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-048-1341. 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