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5544243 — PLUG,PROTECTIVE,DUST AND MOISTUR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

5544243: PLUG,PROTECTIVE,DUST AND MOISTUR.

PLUG,PROTECTIVE,DUST AND MOISTUR. Key specifications include material: ALUMINUM ALLOY, design_type: FRICTION, thread_class: 2B, material_document_and_classification: MIL-C-11866, T6, COMP 2 MIL SPEC SINGLE MATERIAL RESPONSE, thread_size_and_series/type_designator: 0.250-28 UNF, opening_inside_diameter_for_which_designed: 0.3980 INCHES MINIMUM AND 0.3990 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-240-0997, 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
5544243
NSN: 5340-01-240-0997
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
design_typeFRICTION
thread_class2B
material_document_and_classificationMIL-C-11866, T6, COMP 2 MIL SPEC SINGLE MATERIAL RESPONSE
thread_size_and_series/type_designator0.250-28 UNF
opening_inside_diameter_for_which_designed0.3980 INCHES MINIMUM AND 0.3990 INCHES MAXIMUM IN
connector_nominal_thread_size_for_which_designed0.250 INCHES IN
NSN5340-01-240-0997
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5544243 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
•
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED: 0.250 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-11866, T6, COMP 2 MIL SPEC SINGLE MATERIAL RESPONSE
•
OPENING INSIDE DIAMETER FOR WHICH DESIGNED: 0.3980 INCHES MINIMUM AND 0.3990 INCHES MAXIMUM IN
•
THREAD CLASS: 2B
•
MATERIAL: ALUMINUM ALLOY
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 0.250-28 UNF
TECHNICAL CHARACTERISTICS
DESIGN TYPEFRICTION
CONNECTOR NOMINAL THREAD SIZE FOR WHICH DESIGNED0.250 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-11866, T6, COMP 2 MIL SPEC SINGLE MATERIAL RESPONSE
OPENING INSIDE DIAMETER FOR WHICH DESIGNED0.3980 INCHES MINIMUM AND 0.3990 INCHES MAXIMUM IN
THREAD CLASS2B
MATERIALALUMINUM ALLOY
THREAD SIZE AND SERIES/TYPE DESIGNATOR0.250-28 UNF
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5544243?
5544243 is a PLUG,PROTECTIVE,DUST AND MOISTUR.
What is the NSN for 5544243?
5544243 is cataloged in the U.S. Government catalog under NSN 5340-01-240-0997. 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.