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Technical Data Sheet
PartsTable / COMPONENT / 6-4 140140B
6-4 140140B ✓ 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 ASSEMBLY,SHAFT,SPRING LOADE. Key specifications include material: COPPER, style_designator: DOUBLE TAPPED, external_thread_size: 18, internal_thread_size: 0.275, end_item_identification: 2355-01-648-7834, material_document_and_classification: J846 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-202-6491, 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
6-4 140140B
NSN: 4730-00-202-6491
FSC: 4730
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialCOPPER
style_designatorDOUBLE TAPPED
external_thread_size18
internal_thread_size0.275
end_item_identification2355-01-648-7834
material_document_and_classificationJ846 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE
part_name_assigned_by_controlling_agencyREDUCER BUSHINGS
NSN4730-00-202-6491
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6-4 140140B · 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 29
108630Interchangeable
interchangeable cross-reference
interchangeable
W2418Interchangeable
interchangeable cross-reference
interchangeable
100178Interchangeable
interchangeable cross-reference
interchangeable
119928Interchangeable
interchangeable cross-reference
interchangeable
1202065Interchangeable
interchangeable cross-reference
interchangeable
022467Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6-4 140140B?
6-4 140140B is a SEAL ASSEMBLY,SHAFT,SPRING LOADE.
What parts can replace 6-4 140140B?
There are 29 known substitutes for 6-4 140140B: 108630, W2418, 100178 and 26 more. Substitute compatibility should be verified for your specific system.
Is 6-4 140140B still available?
6-4 140140B is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026