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2621-021-01ASSY89 — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

2621-021-01ASSY89: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY BODY, leg_length: 4.750 INCHES MINIMUM AND 10.000 INCHES MAXIMUM FIRST END IN, thread_class: 2A SECOND END A, connection_type: UNTHREADED EXTERNAL PIPE FIRST END, connection_style: DOUBLE THREADED SECTION W/ GASKET AND LOCKNUT SEALING (BOSS) SECOND END, operating_pressure: 700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-161-1291, 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
2621-021-01ASSY89
NSN: 4730-01-161-1291
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialNICKEL ALLOY BODY
leg_length4.750 INCHES MINIMUM AND 10.000 INCHES MAXIMUM FIRST END IN
thread_class2A SECOND END A
connection_typeUNTHREADED EXTERNAL PIPE FIRST END
connection_styleDOUBLE THREADED SECTION W/ GASKET AND LOCKNUT SEALING (BOSS) SECOND END
operating_pressure700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size1.625 INCHES SECOND END IN
thread_quantity_per_inch12 SECOND END
thread_series_designatorUN SECOND END
furnished_items_and_quantity1 LOCK WASHER AND 2 PREFORMED PACKING
nominal_pipe_size_accommodated1.500 INCHES FIRST END IN
material_document_and_classificationQQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE BODY
NSN4730-01-161-1291
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 2621-021-01ASSY89 · 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
•
FURNISHED ITEMS AND QUANTITY: 1 LOCK WASHER AND 2 PREFORMED PACKING
•
NOMINAL PIPE SIZE ACCOMMODATED: 1.500 INCHES FIRST END IN
•
CONNECTION STYLE: PLAIN (PIPE) FIRST END
•
CONNECTION TYPE: THREADED EXTERNAL BOSS SECOND END
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE TAILPIECE
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 LOCK WASHER AND 2 PREFORMED PACKING
NOMINAL PIPE SIZE ACCOMMODATED1.500 INCHES FIRST END IN
CONNECTION STYLEPLAIN (PIPE) FIRST END
CONNECTION STYLEDOUBLE THREADED SECTION W/ GASKET AND LOCKNUT SEALING (BOSS) SECOND END
CONNECTION TYPETHREADED EXTERNAL BOSS SECOND END
CONNECTION TYPEUNTHREADED EXTERNAL PIPE FIRST END
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE TAILPIECE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE BODY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-783 FED SPEC SINGLE MATERIAL RESPONSE LOCK NUT
OPERATING PRESSURE700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
2621-021-01Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2621-021-01ASSY89?
2621-021-01ASSY89 is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace 2621-021-01ASSY89?
There is 1 known substitute for 2621-021-01ASSY89: 2621-021-01. Substitute compatibility should be verified for your specific system.
What is the NSN for 2621-021-01ASSY89?
2621-021-01ASSY89 is cataloged in the U.S. Government catalog under NSN 4730-01-161-1291. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.