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Technical Data Sheet
PartsTable / COMPONENT / 4187-381/TSE02-25
4187-381/TSE02-25 ✓ 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 4187-381/TSE02-25 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-190-2744, 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
4187-381/TSE02-25
NSN: 4730-01-190-2744
FSC: 4730
CAGE: 95208 — PARKER-HANNIFIN CORPORATION DIV CYLINDER DIVISION (USA)
SPECIFICATIONS
Part Number4187-381/TSE02-25
NSN4730-01-190-2744
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4187-381/TSE02-25 · 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
•
MATERIAL: STEEL COMP 303 OVERALL
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
•
THREAD QUANTITY PER INCH: 18
•
NUT STYLE: PIPE SEAL NUT
•
THREAD DIRECTION: RIGHT-HAND
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
WIDTH ACROSS FLATS: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 303 OVERALL
NOMINAL THREAD SIZE0.250 INCHES IN
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
THREAD QUANTITY PER INCH18
NUT STYLEPIPE SEAL NUT
THREAD DIRECTIONRIGHT-HAND
CRITICALITY CODE JUSTIFICATIONZZZY
WIDTH ACROSS FLATS0.750 INCHES NOMINAL IN
FURNISHED ITEMSPREFORMED PACKING
THREAD SERIESNPT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
11479629-2Interchangeable
interchangeable cross-reference
interchangeable
TSE02-25Interchangeable
interchangeable cross-reference
interchangeable
124569Interchangeable
interchangeable cross-reference
interchangeable
TSE02-75Interchangeable
interchangeable cross-reference
interchangeable
4187-381Interchangeable
interchangeable cross-reference
interchangeable
845-7298767PC102Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4187-381/TSE02-25?
4187-381/TSE02-25 is a 4187-381/TSE02-25.
What parts can replace 4187-381/TSE02-25?
There are 9 known substitutes for 4187-381/TSE02-25: 11479629-2, TSE02-25, 124569 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4187-381/TSE02-25?
4187-381/TSE02-25 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-190-2744. 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