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553-437-20-326 — PLUG,TUBE FITTING,THREADED

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

553-437-20-326: PLUG,TUBE FITTING,THREADED.

The PLUG,TUBE FITTING,THREADED is a the manufacturer industrial component. Key specifications include material: TITANIUM OVERALL, nominal_thread_size: 0.438 INCHES EXTERNAL IN, thread_quantity_per_inch: 20 EXTERNAL, thread_series_designator: UNF EXTERNAL. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-344-5737, 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
553-437-20-326
NSN: 4730-01-344-5737
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 10941 — CARVER PUMP COMPANY (USA)
SPECIFICATIONS
materialTITANIUM OVERALL
nominal_thread_size0.438 INCHES EXTERNAL IN
thread_quantity_per_inch20 EXTERNAL
thread_series_designatorUNF EXTERNAL
NSN4730-01-344-5737
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 553-437-20-326 · 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
•
NOMINAL THREAD SIZE: 0.438 INCHES EXTERNAL IN
•
THREAD QUANTITY PER INCH: 20 EXTERNAL
•
MATERIAL: TITANIUM OVERALL
•
THREAD SERIES DESIGNATOR: UNF EXTERNAL
TECHNICAL CHARACTERISTICS
NOMINAL THREAD SIZE0.438 INCHES EXTERNAL IN
THREAD QUANTITY PER INCH20 EXTERNAL
MATERIALTITANIUM OVERALL
THREAD SERIES DESIGNATORUNF EXTERNAL
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
N-999-6101-B-001 ITEM 33Reference 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 553-437-20-326?
553-437-20-326 is a PLUG,TUBE FITTING,THREADED.
What parts can replace 553-437-20-326?
There is 1 known substitute for 553-437-20-326: N-999-6101-B-001 ITEM 33. Substitute compatibility should be verified for your specific system.
What is the NSN for 553-437-20-326?
553-437-20-326 is cataloged in the U.S. Government catalog under NSN 4730-01-344-5737. 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.