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3-900-391 — INTERFACE UNIT,DATA STORAGE SYST

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

3-900-391: INTERFACE UNIT,DATA STORAGE SYST.

INTERFACE UNIT,DATA STORAGE SYST. Key specifications include material: STEEL PROPERTY CLASS 18.8 OVERALL, hole_diameter: 0.114 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN, outside_diameter: 0.209 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, material_thickness: 0.025 INCHES MINIMUM IN, end_item_identification: 6625-01-618-2203. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-292-3662, 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
MRO→ MRO_GENERAL→ 3-900-391
NSN: 4730-01-292-3662
NIINs: 012923662, 015215363, 016905679
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 10988 — CNH INDUSTRIAL AMERICA LLC DBA CNH AMERICA (USA)
SPECIFICATIONS
materialSTEEL PROPERTY CLASS 18.8 OVERALL
hole_diameter0.114 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
outside_diameter0.209 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
material_thickness0.025 INCHES MINIMUM IN
end_item_identification6625-01-618-2203
part_name_assigned_by_controlling_agencySPLIT LOCK WASHER NO.4
NSN4730-01-292-3662
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3-900-391 · 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

No substitute or cross-reference records for this part.

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 3-900-391?
3-900-391 is a INTERFACE UNIT,DATA STORAGE SYST. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 3-900-391?
3-900-391 is cataloged in the U.S. Government catalog under NSN 4730-01-292-3662. 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.