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PartsTable / COMPONENT / 9603-1
9603-1 ✓ 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

The ADAPTER,STRAIGHT,PIPE TO TUBE is a the manufacturer industrial component. Key specifications include material: COPPER OVERALL, body_width: 1.625 INCHES NOMINAL IN, body_height: 2.500 INCHES NOMINAL IN, body_length: 1.625 INCHES NOMINAL IN, inclosure_type: FULLY INCLOSED, mounting_method: FLANGE AND UNTHREADED HOLE(S) SINGLE GROUP. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-266-1821, 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
9603-1
NSN: 4730-00-266-1821
FSC: 4730
CAGE: 12168 — NIBCO INC (USA)
SPECIFICATIONS
materialCOPPER OVERALL
body_width1.625 INCHES NOMINAL IN
body_height2.500 INCHES NOMINAL IN
body_length1.625 INCHES NOMINAL IN
inclosure_typeFULLY INCLOSED
mounting_methodFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
frequency_rating400.0 HERTZ NOMINAL SINGLE COMPONENT
style_designatorCIRCULAR
reliability_indicatorNOT ESTABLISHED
mounting_hole_diameter0.248 INCHES NOMINAL SINGLE GROUP IN
end_item_identificationTWO-BALL PUMP, SERIES LM2203A-XX-B
nominal_thread_diameter8.0 MILLIMETERS MM
NSN4730-00-266-1821
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 9603-1 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
9603-1Interchangeable
interchangeable cross-reference
interchangeable
98031Interchangeable
interchangeable cross-reference
interchangeable
91031Interchangeable
interchangeable cross-reference
interchangeable
N3108Interchangeable
interchangeable cross-reference
interchangeable
N3108-2Interchangeable
interchangeable cross-reference
interchangeable
W-1263Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9603-1?
9603-1 is a ADAPTER,STRAIGHT,PIPE TO TUBE.
What parts can replace 9603-1?
There are 15 known substitutes for 9603-1: 9603-1, 98031, 91031 and 12 more. Substitute compatibility should be verified for your specific system.
Is 9603-1 still available?
9603-1 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