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SS4031 ✓ 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

SLEEVE,COMPRESSION,TUBE-HOSE FIT. Key specifications include criticality_code_justification: ZZZY, reference_number_differentiating_characteristics: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-888-6778, 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
SS4031
NSN: 4730-00-888-6778
FSC: 4730
CAGE: U7307 — SOUTH LONDON VALVE & FITTING COMPANY LTD T/A SWAGELOK LONDON (GBR)
SPECIFICATIONS
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D
NSN4730-00-888-6778
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: SS4031 · 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
•
HOSE/TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 0.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: TAPERED
•
MATERIAL: STEEL CORROSION RESISTING
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH0.188 INCHES NOMINAL IN
HOSE/TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.250 INCHES NOMINAL IN
STYLE DESIGNATORTAPERED
END ITEM IDENTIFICATIONSUPPORTS GRUMMAN A10 AIRCRAFT
MATERIALSTEEL CORROSION RESISTING
CASEHARDENING INDICATORNOT CASEHARDENED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
4TZSSInterchangeable
interchangeable cross-reference
interchangeable
906F054PC15Interchangeable
interchangeable cross-reference
interchangeable
403-1-316Interchangeable
interchangeable cross-reference
interchangeable
906F054 PIECE 15Interchangeable
interchangeable cross-reference
interchangeable
SS4031Interchangeable
interchangeable cross-reference
interchangeable
296843Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SS4031?
SS4031 is a SLEEVE,COMPRESSION,TUBE-HOSE FIT.
What parts can replace SS4031?
There are 16 known substitutes for SS4031: 4TZSS, 906F054PC15, 403-1-316 and 13 more. Substitute compatibility should be verified for your specific system.
Is SS4031 still available?
SS4031 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