PartsTable
Technical Data Sheet

018346 FI/BV — UNION,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

018346 FI/BV: UNION,PIPE.

The UNION,PIPE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 715 OVERALL, connection_type: UNTHREADED INTERNAL PIPE ALL ENDS, connection_style: SOCKET (PIPE) ALL ENDS, special_features: 0-RING RETAINING RING INCLUDED;O-RING MATERIAL IS MIL-R-83248 AND MIL-R-93248/1CLASS 1 RUBBER, RETAINING RING 7-/30 CUNI, operating_pressure: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, nominal_pipe_size_accommodated: 1.250 INCHES ALL ENDS IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-421-3431, 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
018346 FI/BV
NSN: 4730-01-421-3431
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0JC12 — BEC SYSTEMS LLC DBA BEC MACHINE PRODUCTS (USA)
SPECIFICATIONS
materialCOPPER ALLOY 715 OVERALL
connection_typeUNTHREADED INTERNAL PIPE ALL ENDS
connection_styleSOCKET (PIPE) ALL ENDS
special_features0-RING RETAINING RING INCLUDED;O-RING MATERIAL IS MIL-R-83248 AND MIL-R-93248/1CLASS 1 RUBBER, RETAINING RING 7-/30 CUNI
operating_pressure400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_pipe_size_accommodated1.250 INCHES ALL ENDS IN
material_document_and_classificationMIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4730-01-421-3431
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 018346 FI/BV · 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
•
NOMINAL PIPE SIZE ACCOMMODATED: 1.250 INCHES ALL ENDS IN
•
CONNECTION STYLE: SOCKET (PIPE) ALL ENDS
•
CONNECTION TYPE: UNTHREADED INTERNAL PIPE ALL ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OPERATING PRESSURE: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
MATERIAL: COPPER ALLOY 715 OVERALL
TECHNICAL CHARACTERISTICS
NOMINAL PIPE SIZE ACCOMMODATED1.250 INCHES ALL ENDS IN
CONNECTION STYLESOCKET (PIPE) ALL ENDS
CONNECTION TYPEUNTHREADED INTERNAL PIPE ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OPERATING PRESSURE400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
SPECIAL FEATURES0-RING RETAINING RING INCLUDED;O-RING MATERIAL IS MIL-R-83248 AND MIL-R-93248/1CLASS 1 RUBBER, RETAINING RING 7-/30 CUNI
MATERIALCOPPER ALLOY 715 OVERALL
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 7
77301250 1 1/4 INCH SWReference document
Same NSN cross-reference
Reference document — Secondary reference
77301250F 1 1/4 INCH SW 70/30CUReference document
Same NSN cross-reference
Reference document — Secondary reference
77301250Reference document
Same NSN cross-reference
Reference document — Secondary reference
77301250FReference document
Same NSN cross-reference
Reference document — Design control — primary reference
47950-20Reference document
Same NSN cross-reference
Reference document — Secondary reference
77301250 70/30 CUNIReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 018346 FI/BV?
018346 FI/BV is a UNION,PIPE.
What parts can replace 018346 FI/BV?
There are 7 known substitutes for 018346 FI/BV: 77301250 1 1/4 INCH SW, 77301250F 1 1/4 INCH SW 70/30CU, 77301250 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 018346 FI/BV?
018346 FI/BV is cataloged in the U.S. Government catalog under NSN 4730-01-421-3431. 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.