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SECO27CT3 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

SEAL,CONICAL,FLARED TUBE FITTING. Key specifications include material: COPPER ALLOY 130, body_length: 0.302 INCHES NOMINAL IN, wall_thickness: 0.005 INCHES NOMINAL IN, outside_diameter: 0.317 INCHES NOMINAL IN, special_features: L AFTER DASH NUMBER WILL BE LOX CLEANED AND PACKAGED IN ACCORDANCE WITH MAC SPEC 27M100, style_designator: SEAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-286-8841, 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
SECO27CT3
NSN: 4730-01-286-8841
FSC: 4730
CAGE: 33447 — SECO SEALS, INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY 130
body_length0.302 INCHES NOMINAL IN
wall_thickness0.005 INCHES NOMINAL IN
outside_diameter0.317 INCHES NOMINAL IN
special_featuresL AFTER DASH NUMBER WILL BE LOX CLEANED AND PACKAGED IN ACCORDANCE WITH MAC SPEC 27M100
style_designatorSEAL
seat_angle_in_deg37.0
surface_treatmentTIN
casehardening_indicatorNOT CASEHARDENED
end_item_identificationBEN MISSILE; ALL-WEATHER; ANTI-SHIP, HARPOON (AGM-84)
hose/tube_outside_diameter_for_which_designed0.188 INCHES NOMINAL IN
NSN4730-01-286-8841
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: SECO27CT3 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
BODY LENGTH: 0.302 INCHES NOMINAL IN
•
SEAT ANGLE IN DEG: 37.0
•
HOSE/TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.188 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 0.317 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY 130
•
STYLE DESIGNATOR: SEAL
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONBEN MISSILE; ALL-WEATHER; ANTI-SHIP, HARPOON (AGM-84)
BODY LENGTH0.302 INCHES NOMINAL IN
SEAT ANGLE IN DEG37.0
SPECIAL FEATURESL AFTER DASH NUMBER WILL BE LOX CLEANED AND PACKAGED IN ACCORDANCE WITH MAC SPEC 27M100
HOSE/TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.188 INCHES NOMINAL IN
OUTSIDE DIAMETER0.317 INCHES NOMINAL IN
MATERIALCOPPER ALLOY 130
STYLE DESIGNATORSEAL
SURFACE TREATMENTTIN
CASEHARDENING INDICATORNOT CASEHARDENED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
7M27C12Interchangeable
interchangeable cross-reference
interchangeable
SEC027C12LInterchangeable
interchangeable cross-reference
interchangeable
44300-550-1Interchangeable
interchangeable cross-reference
interchangeable
VSF1015A4Interchangeable
interchangeable cross-reference
interchangeable
7A4Interchangeable
interchangeable cross-reference
interchangeable
SEC027A6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SECO27CT3?
SECO27CT3 is a SEAL,CONICAL,FLARED TUBE FITTING.
What parts can replace SECO27CT3?
There are 22 known substitutes for SECO27CT3: 7M27C12, SEC027C12L, 44300-550-1 and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SECO27CT3?
SECO27CT3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-286-8841. 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