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ST4905 ✓ 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

The RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include style_designator: OUTSIDE HEXAGON OR OCTAGON (PARTIAL OR FULL THREAD OPTIONAL), external_thread_size: 0.375-18, internal_thread_size: 0.250-18, external_thread_direction: RIGHT-HAND, internal_thread_direction: RIGHT-HAND, external_screw_thread_series_designator: NPTF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-268-4007, 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
ST4905
NSN: 4730-01-268-4007
FSC: 4730
CAGE: 04236 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
style_designatorOUTSIDE HEXAGON OR OCTAGON (PARTIAL OR FULL THREAD OPTIONAL)
external_thread_size0.375-18
internal_thread_size0.250-18
external_thread_directionRIGHT-HAND
internal_thread_directionRIGHT-HAND
external_screw_thread_series_designatorNPTF
internal_screw_thread_series_designatorNPTF
NSN4730-01-268-4007
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ST4905 · 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
•
INTERNAL THREAD SIZE: 0.250-18
•
EXTERNAL SCREW THREAD SERIES DESIGNATOR: NPTF
•
EXTERNAL THREAD DIRECTION: RIGHT-HAND
•
INTERNAL SCREW THREAD SERIES DESIGNATOR: NPTF
•
INTERNAL THREAD DIRECTION: RIGHT-HAND
•
STYLE DESIGNATOR: OUTSIDE HEXAGON OR OCTAGON (PARTIAL OR FULL THREAD OPTIONAL)
•
EXTERNAL THREAD SIZE: 0.375-18
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL THREAD SIZE0.250-18
EXTERNAL SCREW THREAD SERIES DESIGNATORNPTF
EXTERNAL THREAD DIRECTIONRIGHT-HAND
INTERNAL SCREW THREAD SERIES DESIGNATORNPTF
INTERNAL THREAD DIRECTIONRIGHT-HAND
STYLE DESIGNATOROUTSIDE HEXAGON OR OCTAGON (PARTIAL OR FULL THREAD OPTIONAL)
EXTERNAL THREAD SIZE0.375-18
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
9824Interchangeable
interchangeable cross-reference
interchangeable
TT-2084Interchangeable
interchangeable cross-reference
interchangeable
10517Interchangeable
interchangeable cross-reference
interchangeable
10676Interchangeable
interchangeable cross-reference
interchangeable
W02-2076Y-02TSInterchangeable
interchangeable cross-reference
interchangeable
274027-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ST4905?
ST4905 is a RELAY,ELECTROMAGNETIC.
What parts can replace ST4905?
There are 9 known substitutes for ST4905: 9824, TT-2084, 10517 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST4905?
ST4905 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-268-4007. 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