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Technical Data Sheet
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218219 ✓ 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

CABLE ASSEMBLY,SPECIAL PURPOSE,E. Key specifications include material: STEEL COMP 410 OVERALL, hole_type: DRILLED, head_style: FLAT CHAMFER, head_height: 0.190 INCHES NOMINAL IN, thread_class: 3A A, head_diameter: 0.313 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-2954, 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
218219
NSN: 4730-00-278-2954
FSC: 4730
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 410 OVERALL
hole_typeDRILLED
head_styleFLAT CHAMFER
head_height0.190 INCHES NOMINAL IN
thread_class3A A
head_diameter0.313 INCHES NOMINAL IN
hole_diameter0.047 INCHES NOMINAL IN
hole_quantity6
thread_length0.880 INCHES MINIMUM IN
fastener_length2.875 INCHES NOMINAL IN
hardness_rating25.0 ROCKWELL C MINIMUM AND 28.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
NSN4730-00-278-2954
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 218219 · 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
KEY FEATURES
•
OPERATING PRESSURE: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A197 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
SPECIFICATION/STANDARD DATA: 81348-WW-P-521 GOVERNMENT SPECIFICATION
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE
•
FLOW ANGLE: 45.0 DEGREES
•
MAXIMUM OPERATING TEMP: 500.0 FAHRENHEIT FIRST RESPONSE DEGF
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
•
CONNECTION STYLE: PLAIN (PIPE) SECOND END
TYPICAL APPLICATIONS
  • Server Internal Cabling
  • Data Center Cable Infrastructure
  • SAS/SATA Drive Connectivity
TECHNICAL CHARACTERISTICS (FLIS)
OPERATING PRESSURE150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A197 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SPECIFICATION/STANDARD DATA81348-WW-P-521 GOVERNMENT SPECIFICATION
NONDEFINITIVE SPEC/STD DATA1 TYPE
FLOW ANGLE45.0 DEGREES
MAXIMUM OPERATING TEMP500.0 FAHRENHEIT FIRST RESPONSE DEGF
THREAD SERIES DESIGNATORNPT ALL ENDS
CONNECTION STYLEPLAIN (PIPE) SECOND END
CONNECTION TYPETHREADED EXTERNAL PIPE SECOND END
MAXIMUM OPERATING TEMP150.0 FAHRENHEIT SECOND RESPONSE DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
416-3308-004Interchangeable
interchangeable cross-reference
interchangeable
WWP521TYPE1Interchangeable
interchangeable cross-reference
interchangeable
ASME B16.3Interchangeable
interchangeable cross-reference
interchangeable
221-524Interchangeable
interchangeable cross-reference
interchangeable
2CD764Interchangeable
interchangeable cross-reference
interchangeable
13218E0059-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 218219?
218219 is a CABLE ASSEMBLY,SPECIAL PURPOSE,E.
What parts can replace 218219?
There are 17 known substitutes for 218219: 416-3308-004, WWP521TYPE1, ASME B16.3 and 14 more. Substitute compatibility should be verified for your specific system.
Is 218219 still available?
218219 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