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443998 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

CAPACITOR,FIXED,METALLIZED,PAPER. Key specifications include material: STEEL COMP 8740 OVERALL, nut_style: ROUND, nut_diameter: 2.807 INCHES MINIMUM AND 2.817 INCHES MAXIMUM IN, thread_class: 3B, nut_thickness: 0.275 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN, thread_series: UNS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-415-3172, 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
443998
NSN: 4730-00-415-3172
FSC: 4730
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OVERALL
nut_styleROUND
nut_diameter2.807 INCHES MINIMUM AND 2.817 INCHES MAXIMUM IN
thread_class3B
nut_thickness0.275 INCHES MINIMUM AND 0.285 INCHES MAXIMUM IN
thread_seriesUNS
thread_directionRIGHT-HAND
drive_point_depth0.127 INCHES NOMINAL IN
drive_point_width0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
nominal_thread_size2.312 INCHES IN
drive_point_quantity8
NSN4730-00-415-3172
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 443998 · 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
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
5100136Interchangeable
interchangeable cross-reference
interchangeable
207163Interchangeable
interchangeable cross-reference
interchangeable
BB56Interchangeable
interchangeable cross-reference
interchangeable
120BInterchangeable
interchangeable cross-reference
interchangeable
120-3Interchangeable
interchangeable cross-reference
interchangeable
2747Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 443998?
443998 is a CAPACITOR,FIXED,METALLIZED,PAPER.
What parts can replace 443998?
There are 22 known substitutes for 443998: 5100136, 207163, BB56 and 19 more. Substitute compatibility should be verified for your specific system.
Is 443998 still available?
443998 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026