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A-18281 ✓ 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

CONE AND ROLLERS,TAPERED ROLLER. Key specifications include material: STEEL OVERALL, body_width: 3.688 INCHES NOMINAL IN, cone_width: 1.4375 INCHES NOMINAL IN, body_height: 4.500 INCHES NOMINAL IN, body_length: 4.312 INCHES NOMINAL IN, bore_diameter: 3.7500 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-263-2752, 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
A-18281
NSN: 4730-00-263-2752
FSC: 4730
CAGE: 35301 — DRESSER INDUSTRIES INC LEROI DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
body_width3.688 INCHES NOMINAL IN
cone_width1.4375 INCHES NOMINAL IN
body_height4.500 INCHES NOMINAL IN
body_length4.312 INCHES NOMINAL IN
bore_diameter3.7500 INCHES NOMINAL IN
inclosure_typeHERMETICALLY SEALED
mounting_methodTHREADED STUD(S) SINGLE GROUP
style_designatorNORMAL ANGLE
cone_corner_radius0.1875 INCHES NOMINAL IN
nominal_thread_size0.190 INCHES SINGLE GROUP IN
reliability_indicatorNOT ESTABLISHED
NSN4730-00-263-2752
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A-18281 · 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
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
325C120Interchangeable
interchangeable cross-reference
interchangeable
SM-D-192430Interchangeable
interchangeable cross-reference
interchangeable
A387-3018Interchangeable
interchangeable cross-reference
interchangeable
A18-281Interchangeable
interchangeable cross-reference
interchangeable
144EX657Interchangeable
interchangeable cross-reference
interchangeable
DHZ1244-AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-18281?
A-18281 is a CONE AND ROLLERS,TAPERED ROLLER.
What parts can replace A-18281?
There are 14 known substitutes for A-18281: 325C120, SM-D-192430, A387-3018 and 11 more. Substitute compatibility should be verified for your specific system.
Is A-18281 still available?
A-18281 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