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55E211 ✓ 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: ALUMINUM ALLOY 1100, body_length: 0.095 INCHES NOMINAL IN, overall_length: 0.138 INCHES NOMINAL IN, wall_thickness: 0.010 INCHES NOMINAL IN, outside_diameter: 0.674 INCHES MINIMUM AND 0.679 INCHES MAXIMUM IN, special_features: CLEANED FOR LOX SERVICE; WEAPON SYSTEM ESSENTIAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-606-1716, 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
55E211
NSN: 4730-00-606-1716
FSC: 4730
CAGE: 38597 — LOCKHEED MARTIN CORPORATION DIV ROTARY AND MISSION SYSTEMS (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 1100
body_length0.095 INCHES NOMINAL IN
overall_length0.138 INCHES NOMINAL IN
wall_thickness0.010 INCHES NOMINAL IN
outside_diameter0.674 INCHES MINIMUM AND 0.679 INCHES MAXIMUM IN
special_featuresCLEANED FOR LOX SERVICE; WEAPON SYSTEM ESSENTIAL
style_designatorSEAL
seat_angle_in_deg37.0
casehardening_indicatorNOT CASEHARDENED
end_item_identificationAIRCRAFT, GALAXY C-5, STRATOLIFTER C-135, HERCULES C-130, GALAXY C-5, AWACS, E-3A, HELICOPTER, IROQUOIS UH-1 AND UH-1N, MISSILE, MX PEACEKEEPER AND LANTURN A
criticality_code_justificationFEAT
hose/tube_outside_diameter_for_which_designed0.500 INCHES NOMINAL IN
NSN4730-00-606-1716
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 55E211 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
VSF1015A32Interchangeable
interchangeable cross-reference
interchangeable
10630103-31Interchangeable
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 55E211?
55E211 is a SEAL,CONICAL,FLARED TUBE FITTING.
What parts can replace 55E211?
There are 21 known substitutes for 55E211: VSF1015A32, 10630103-31, 44300-550-1 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 55E211?
55E211 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-606-1716. 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