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D8998F20 — NUT,TUBE COUPLING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

D8998F20: NUT,TUBE COUPLING.

The NUT,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: ALUMINUM NUT, nut_style: TUBE COUPLING, nut_length: 0.871 INCHES MINIMUM AND 0.878 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), width_across_flats: 0.783 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-409-6273, 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
D8998F20
NSN: 4730-00-409-6273
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 14798 — DESIGNED METAL CONNECTIONS INC DBA PERMASWAGE USA DIV PERMASWAGE, A PCC COMPANY (USA)
SPECIFICATIONS
materialALUMINUM NUT
nut_styleTUBE COUPLING
nut_length0.871 INCHES MINIMUM AND 0.878 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
width_across_flats0.783 INCHES NOMINAL IN
nominal_thread_size0.750 INCHES IN
end_item_identificationC5
thread_quantity_per_inch16
nominal_tube_outside_diameter0.500 INCHES IN
material_document_and_classificationSTSPS003 MFR REF SINGLE MATERIAL RESPONSE NUT
part_name_assigned_by_controlling_agencyNUT-COUPLING,REDUCED
NSN4730-00-409-6273
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: D8998F20 · 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
SUBSTITUTES & CROSS-REFERENCES 4
GA7432F20Reference document
Same NSN cross-reference
Reference document — Secondary reference
35220-1-20Reference document
Same NSN cross-reference
Reference document — Secondary reference
US1142F20Reference document
Same NSN cross-reference
Reference document — Secondary reference
STSPB804Reference 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 D8998F20?
D8998F20 is a NUT,TUBE COUPLING.
What parts can replace D8998F20?
There are 4 known substitutes for D8998F20: GA7432F20, 35220-1-20, US1142F20 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for D8998F20?
D8998F20 is cataloged in the U.S. Government catalog under NSN 4730-00-409-6273. 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.