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4TZ-SS ✓ 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 material: STEEL CORROSION RESISTING, overall_length: 0.188 INCHES NOMINAL IN, style_designator: TAPERED, casehardening_indicator: NOT CASEHARDENED, end_item_identification: SUPPORTS GRUMMAN A10 AIRCRAFT, hose/tube_outside_diameter_for_which_designed: 0.250 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-088-4338, 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
4TZ-SS
NSN: 4730-00-088-4338
FSC: 4730
CAGE: 54938 — PARKER-HANNIFIN CORPORATION DIV INSTRUMENTATION PRODUCTS DIVISION (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
overall_length0.188 INCHES NOMINAL IN
style_designatorTAPERED
casehardening_indicatorNOT CASEHARDENED
end_item_identificationSUPPORTS GRUMMAN A10 AIRCRAFT
hose/tube_outside_diameter_for_which_designed0.250 INCHES NOMINAL IN
NSN4730-00-088-4338
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4TZ-SS · 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
•
SLEEVE OUTSIDE DIAMETER: 0.362 INCHES NOMINAL IN
•
STYLE DESIGNATOR: TAPERED
•
MATERIAL: STEEL COMP 316
•
TAPER LENGTH: 0.120 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS (FLIS)
HOSE/TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED0.250 INCHES NOMINAL IN
SLEEVE OUTSIDE DIAMETER0.362 INCHES NOMINAL IN
STYLE DESIGNATORTAPERED
MATERIALSTEEL COMP 316
TAPER LENGTH0.120 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
OVERALL LENGTH0.241 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
CS-306-01Interchangeable
interchangeable cross-reference
interchangeable
SS-403-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4TZ-SS?
4TZ-SS is a SLEEVE,COMPRESSION,TUBE-HOSE FIT.
What parts can replace 4TZ-SS?
There are 2 known substitutes for 4TZ-SS: CS-306-01, SS-403-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 4TZ-SS?
4TZ-SS is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-088-4338. 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