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Technical Data Sheet
PartsTable / COMPONENT / 4-190909 3-8 8
4-190909 3-8 8 ✓ 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 ADAPTER,STRAIGHT,HOSE TO BOSS is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, thread_class: 3A SECOND END A, connection_type: THREADED EXTERNAL BOSS SECOND END, connection_style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END, operating_pressure: 3500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, nominal_thread_size: 1.375 INCHES SECOND END 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 4730-00-177-5966, 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
4-190909 3-8 8
NSN: 4730-00-177-5966
FSC: 4730
CAGE: 01276 — DANFOSS POWER SOLUTIONS II, LLC (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class3A SECOND END A
connection_typeTHREADED EXTERNAL BOSS SECOND END
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
operating_pressure3500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size1.375 INCHES SECOND END IN
maximum_operating_temp200.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length2.960 INCHES IN
thread_series_designatorUNF SECOND END
furnished_items_and_quantity1 HOSE COUPLING NUT
material_document_and_classificationQQ-N-281 CLASS 1 OR B FED SPEC SINGLE MATERIAL RESPONSE OVERALL
nominal_inside_diameter_hose_accommodated0.500 INCHES FIRST END IN
NSN4730-00-177-5966
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4-190909 3-8 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
KEY FEATURES
•
CONNECTION STYLE: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
•
THREAD SERIES DESIGNATOR: UNF SECOND END
•
NOMINAL OVERALL LENGTH: 2.960 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 CLASS 1 OR B FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OPERATING PRESSURE: 3500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
MATERIAL: NICKEL ALLOY OVERALL
•
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED: 0.970 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
CONNECTION STYLEGRIPPING NIPPLE (NOSE) FIRST END
THREAD SERIES DESIGNATORUNF SECOND END
NOMINAL OVERALL LENGTH2.960 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 CLASS 1 OR B FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OPERATING PRESSURE3500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MATERIALNICKEL ALLOY OVERALL
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED0.970 INCHES FIRST END IN
THREAD CLASS3A SECOND END A
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.500 INCHES FIRST END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
M24787/3,TY-C,GR-I,-20 1Interchangeable
interchangeable cross-reference
interchangeable
4-190909-1-20Interchangeable
interchangeable cross-reference
interchangeable
19-02-5145Interchangeable
interchangeable cross-reference
interchangeable
CMC-41-5602-1-1/2-32Interchangeable
interchangeable cross-reference
interchangeable
4190909Interchangeable
interchangeable cross-reference
interchangeable
41909011/232Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4-190909 3-8 8?
4-190909 3-8 8 is a ADAPTER,STRAIGHT,HOSE TO BOSS.
What parts can replace 4-190909 3-8 8?
There are 19 known substitutes for 4-190909 3-8 8: M24787/3,TY-C,GR-I,-20 1, 4-190909-1-20, 19-02-5145 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4-190909 3-8 8?
4-190909 3-8 8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-177-5966. 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