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H623-0501-26 — CONNECTING LINK,RIGID

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

H623-0501-26: CONNECTING LINK,RIGID.

The CONNECTING LINK,RIGID is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY AND ALUMINUM ALLOY OVERALL, thread_class: 2B ALL ENDS, connection_type: THREADED INTERNAL TUBE ALL ENDS, connection_style: PLAIN (TUBE) ALL ENDS, style_designator: PLAIN, nominal_thread_size: 3.375 INCHES ALL ENDS IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-492-7588, 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
H623-0501-26
NSN: 4730-01-492-7588
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialCOPPER ALLOY AND ALUMINUM ALLOY OVERALL
thread_class2B ALL ENDS
connection_typeTHREADED INTERNAL TUBE ALL ENDS
connection_stylePLAIN (TUBE) ALL ENDS
special_featuresUSED ON THE STEERING AND DIVING SYSTEMS; MATERIAL IS NICKEL-COPPER-ALUMINUM ALLOY; MANUFACTURER EQUAL P/N 36-37-7873; COUPLING HAS 10 HOLES AT 1.06 INCHES IN DIAMETER FOR MOUNTING IN
style_designatorPLAIN
nominal_thread_size3.375 INCHES ALL ENDS IN
nominal_overall_length3.600 INCHES IN
end_item_identificationLOS ANGELES CLASS SSN (688)
thread_quantity_per_inch12 ALL ENDS
thread_series_designatorUN ALL ENDS
material_document_and_classificationQQ-N-286, FORM 2, COND ANL FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4730-01-492-7588
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: H623-0501-26 · 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: PLAIN (TUBE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 3.600 INCHES IN
•
CONNECTION TYPE: THREADED INTERNAL TUBE ALL ENDS
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-286, FORM 2, COND ANL FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 3.375 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 3.375 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEPLAIN (TUBE) ALL ENDS
NOMINAL OVERALL LENGTH3.600 INCHES IN
CONNECTION TYPETHREADED INTERNAL TUBE ALL ENDS
STYLE DESIGNATORPLAIN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-286, FORM 2, COND ANL FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED3.375 INCHES ALL ENDS IN
NOMINAL THREAD SIZE3.375 INCHES ALL ENDS IN
SPECIAL FEATURESUSED ON THE STEERING AND DIVING SYSTEMS; MATERIAL IS NICKEL-COPPER-ALUMINUM ALLOY; MANUFACTURER EQUAL P/N 36-37-7873; COUPLING HAS 10 HOLES AT 1.06 INCHES IN DIAMETER FOR MOUNTING IN
PART NAME ASSIGNED BY CONTROLLING AGENCYCOUPLING
THREAD CLASS2B ALL ENDS
SUBSTITUTES & CROSS-REFERENCES 9
H698-0505-33Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
566-6985429-21Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
6985431Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
566-6985429-71Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
H623-0501-71Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
H698-0501-21Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandDemilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is H623-0501-26?
H623-0501-26 is a CONNECTING LINK,RIGID.
What parts can replace H623-0501-26?
There are 9 known substitutes for H623-0501-26: H698-0505-33, 566-6985429-21, 6985431 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H623-0501-26?
H623-0501-26 is cataloged in the U.S. Government catalog under NSN 4730-01-492-7588. 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.