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PartsTable / COMPONENT / 1655798-11
1655798-11 ✓ 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,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1118 OVERALL, thread_class: 2A FIRST END A, connection_type: THREADED EXTERNAL TUBE FIRST END, connection_style: GASKET SEAL, COMPRESSION (TUBE) FIRST END, special_features: DYED BLACK, surface_treatment: PHOSPHATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-709-8681, 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
1655798-11
NSN: 4730-00-709-8681
FSC: 4730
CAGE: 97576 — LENZ INC DBA THE LENZ COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 1118 OVERALL
thread_class2A FIRST END A
connection_typeTHREADED EXTERNAL TUBE FIRST END
connection_styleGASKET SEAL, COMPRESSION (TUBE) FIRST END
special_featuresDYED BLACK
surface_treatmentPHOSPHATE OVERALL
operating_pressure2500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.250 INCHES SECOND END IN
maximum_operating_temp135.0 FAHRENHEIT SINGLE RESPONSE DEGF
nominal_overall_length1.875 INCHES IN
thread_series_designatorUNF FIRST END
furnished_items_and_quantity1 SHORT COUPLING NUT AND 1 FLAT WASHER AND 1 SPLIT COLLET SLEEVE
NSN4730-00-709-8681
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 1655798-11 · 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
•
THREAD SERIES DESIGNATOR: UNF FIRST END
•
MATERIAL: STEEL COMP 1118 OVERALL
•
NOMINAL THREAD SIZE: 0.250 INCHES SECOND END IN
•
CONNECTION STYLE: GASKET SEAL, COMPRESSION (TUBE) FIRST END
•
FURNISHED ITEMS AND QUANTITY: 1 SHORT COUPLING NUT AND 1 FLAT WASHER AND 1 SPLIT COLLET SLEEVE
•
CONNECTION TYPE: THREADED EXTERNAL PIPE SECOND END
•
NOMINAL OVERALL LENGTH: 1.875 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNF FIRST END
MATERIALSTEEL COMP 1118 OVERALL
NOMINAL THREAD SIZE0.250 INCHES SECOND END IN
CONNECTION STYLEGASKET SEAL, COMPRESSION (TUBE) FIRST END
NOMINAL THREAD SIZE0.875 INCHES FIRST END IN
FURNISHED ITEMS AND QUANTITY1 SHORT COUPLING NUT AND 1 FLAT WASHER AND 1 SPLIT COLLET SLEEVE
CONNECTION TYPETHREADED EXTERNAL PIPE SECOND END
NOMINAL OVERALL LENGTH1.875 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
10084Interchangeable
interchangeable cross-reference
interchangeable
2B3202Interchangeable
interchangeable cross-reference
interchangeable
GGG-E-936Interchangeable
interchangeable cross-reference
interchangeable
GGG-E-936 TY2SZ8Interchangeable
interchangeable cross-reference
interchangeable
125330Interchangeable
interchangeable cross-reference
interchangeable
110 1-5/16Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1655798-11?
1655798-11 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace 1655798-11?
There are 18 known substitutes for 1655798-11: 10084, 2B3202, GGG-E-936 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1655798-11?
1655798-11 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-709-8681. 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