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5400-S2-8 — Technical Data Sheet

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— · 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 COUPLING HALF,SELF-SEALING is a the manufacturer industrial component. Key specifications include material: STEEL BODY, thread_class: 2B ALL ENDS, overall_length: 1.370 INCHES NOMINAL IN, connection_type: THREADED INTERNAL BOSS FIRST FLUID END CONNECTION, connection_style: BOSS GASKET SEAL ALL ENDS, style_designator: MALE COUPLING HALF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4730-00-051-4675, 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
5400-S2-8
NSN: 4730-00-051-4675
FSC: 4730
CAGE: 01276 — DANFOSS POWER SOLUTIONS II, LLC (USA)
SPECIFICATIONS
materialSTEEL BODY
thread_class2B ALL ENDS
overall_length1.370 INCHES NOMINAL IN
connection_typeTHREADED INTERNAL BOSS FIRST FLUID END CONNECTION
connection_styleBOSS GASKET SEAL ALL ENDS
style_designatorMALE COUPLING HALF
nominal_thread_size0.750 INCHES ALL ENDS IN
thread_series_designatorUNF ALL ENDS
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
NSN4730-00-051-4675
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 5400-S2-8 · 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESAS DIFFERENTIATED BY QUALITY CONTROL IAW MIL-Q-9858
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
81.98126-0037InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
503-4556027InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2670-57InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2670-57 ITEM 9InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
845-2445071ITEM9InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
16-00-8305InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5400-S2-8?
5400-S2-8 is a COUPLING HALF,SELF-SEALING.
What parts can replace 5400-S2-8?
There are 9 known substitutes for 5400-S2-8: 81.98126-0037, 503-4556027, 2670-57 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5400-S2-8?
5400-S2-8 is cataloged in the Federal Logistics Information System under NSN 4730-00-051-4675. 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: September 2026