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75643-21X4PCF9 — SPACER,FLEXIBLE,PIPELINE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

75643-21X4PCF9: SPACER,FLEXIBLE,PIPELINE.

The SPACER,FLEXIBLE,PIPELINE is a the manufacturer industrial component. Key specifications include material: RUBBER CHLOROPRENE CLASS CR, thickness: 0.188 INCHES NOMINAL IN, body_length: 2.125 INCHES NOMINAL IN, inside_width: 9.000 INCHES NOMINAL IN, inside_length: 58.000 INCHES NOMINAL IN, outside_width: 11.500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-082-5923, 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
75643-21X4PCF9
NSN: 4730-00-082-5923
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR
thickness0.188 INCHES NOMINAL IN
body_length2.125 INCHES NOMINAL IN
inside_width9.000 INCHES NOMINAL IN
inside_length58.000 INCHES NOMINAL IN
outside_width11.500 INCHES NOMINAL IN
overall_length60.500 INCHES NOMINAL IN
flange_thickness0.188 INCHES NOMINAL IN
style_designatorRECTANGULAR
material_document_and_classificationMIL-R-6855, CLASS 2, GRADE 60 MIL SPEC SINGLE MATERIAL RESPONSE
NSN4730-00-082-5923
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 75643-21X4PCF9 · 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
•
INSIDE WIDTH: 9.000 INCHES NOMINAL IN
•
INSIDE LENGTH: 58.000 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.188 INCHES NOMINAL IN
•
STYLE DESIGNATOR: RECTANGULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-6855, CLASS 2, GRADE 60 MIL SPEC SINGLE MATERIAL RESPONSE
•
BODY LENGTH: 2.125 INCHES NOMINAL IN
•
OUTSIDE WIDTH: 11.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
INSIDE WIDTH9.000 INCHES NOMINAL IN
INSIDE LENGTH58.000 INCHES NOMINAL IN
FLANGE THICKNESS0.188 INCHES NOMINAL IN
STYLE DESIGNATORRECTANGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-6855, CLASS 2, GRADE 60 MIL SPEC SINGLE MATERIAL RESPONSE
OVERALL LENGTH60.500 INCHES NOMINAL IN
BODY LENGTH2.125 INCHES NOMINAL IN
OUTSIDE WIDTH11.500 INCHES NOMINAL IN
MATERIALRUBBER CHLOROPRENE CLASS CR
THICKNESS0.188 INCHES NOMINAL IN
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
SSBN616-501-2005404PC16Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 75643-21X4PCF9?
75643-21X4PCF9 is a SPACER,FLEXIBLE,PIPELINE.
What parts can replace 75643-21X4PCF9?
There is 1 known substitute for 75643-21X4PCF9: SSBN616-501-2005404PC16. Substitute compatibility should be verified for your specific system.
What is the NSN for 75643-21X4PCF9?
75643-21X4PCF9 is cataloged in the U.S. Government catalog under NSN 4730-00-082-5923. 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.