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Technical Data Sheet
PartsTable / COMPONENT / 634B-2-1/2AL
634B-2-1/2AL ✓ 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 634B-2-1/2AL is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-019-7432, 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
634B-2-1/2AL
NSN: 4730-01-019-7432
FSC: 4730
CAGE: 81718 — OPW FUELING COMPONENTS INC. DIV OPW FUELING COMPONENTS (USA)
SPECIFICATIONS
Part Number634B-2-1/2AL
NSN4730-01-019-7432
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 634B-2-1/2AL · 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 26
S3678Interchangeable
interchangeable cross-reference
interchangeable
10-03678Interchangeable
interchangeable cross-reference
interchangeable
801E1181Interchangeable
interchangeable cross-reference
interchangeable
A-A-59326/10Interchangeable
interchangeable cross-reference
interchangeable
AA59326/10-2-BInterchangeable
interchangeable cross-reference
interchangeable
634-B-3/4IN-BRInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 634B-2-1/2AL?
634B-2-1/2AL is a 634B-2-1/2AL.
What parts can replace 634B-2-1/2AL?
There are 26 known substitutes for 634B-2-1/2AL: S3678, 10-03678, 801E1181 and 23 more. Substitute compatibility should be verified for your specific system.
Is 634B-2-1/2AL still available?
634B-2-1/2AL 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