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SMPH4 — PLUG,PROTECTIVE,DUST AND MOISTUR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

SMPH4: PLUG,PROTECTIVE,DUST AND MOISTUR.

PLUG,PROTECTIVE,DUST AND MOISTUR. Key specifications include end_item_identification: TICONDEROGA CLASS CC;B1 SUPPORT EQUIPMENT. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-021-3519, 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
SMPH4
NSN: 5340-01-021-3519
NIINs: 010213519, 012080753
FSC: 5340 — Hardware, Commercial
CAGE: 78357 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV QUICK COUPLER DIVISION (USA)
SPECIFICATIONS
end_item_identificationTICONDEROGA CLASS CC;B1 SUPPORT EQUIPMENT
NSN5340-01-021-3519
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SMPH4 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
•
DESIGN TYPE: FRICTION
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 0.250 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE
•
MATERIAL: STEEL CORROSION RESISTING
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
OPENING INSIDE DIAMETER FOR WHICH DESIGNED0.250 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE
MATERIALSTEEL CORROSION RESISTING
SUBSTITUTES & CROSS-REFERENCES 2
S6MPH4-316Reference document
Same NSN cross-reference
Reference document — Secondary reference
SMPH4-316Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is SMPH4?
SMPH4 is a PLUG,PROTECTIVE,DUST AND MOISTUR.
What parts can replace SMPH4?
There are 2 known substitutes for SMPH4: S6MPH4-316, SMPH4-316. Substitute compatibility should be verified for your specific system.
What is the NSN for SMPH4?
SMPH4 is cataloged in the U.S. Government catalog under NSN 5340-01-021-3519. 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.