PartsTable
Technical Data Sheet
Download PDF

4FNU-SS-QMS — CAP,TUBE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

4FNU-SS-QMS: CAP,TUBE.

The CAP,TUBE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, thread_class: 2B INTERNAL, connection_style: FLARELESS, style_designator: CAP, nominal_thread_size: 0.4375 INCHES INTERNAL IN, thread_series_designator: UNF INTERNAL. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-561-3667, 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
4FNU-SS-QMS
NSN: 4730-01-561-3667
NIINs: 015613667, 017329091
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 4N161 — WESTERN FLUID COMPONENTS INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
thread_class2B INTERNAL
connection_styleFLARELESS
style_designatorCAP
nominal_thread_size0.4375 INCHES INTERNAL IN
thread_series_designatorUNF INTERNAL
material_document_and_classificationSAE 080112 INTERNATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyCAP, FLARELESS SWIVEL
tube_outside_diameter_for_which_designed0.250 INCHES NOMINAL IN
NSN4730-01-561-3667
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4FNU-SS-QMS · 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
TECHNICAL CHARACTERISTICS
PART NAME ASSIGNED BY CONTROLLING AGENCYCAP,SPECIAL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy 4FNU-SS-QMS?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 4FNU-SS-QMS?
4FNU-SS-QMS is a CAP,TUBE.
What is the NSN for 4FNU-SS-QMS?
4FNU-SS-QMS is cataloged in the U.S. Government catalog under NSN 4730-01-561-3667. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 4FNU-SS-QMS

✓ 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.