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Technical Data Sheet
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634-B-21/2 — Technical Data Sheet

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— · 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 CAP,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY BODY, overall_length: 2.250 INCHES NOMINAL IN, special_features: PART OF THE PIPING CONTROL ASSEMBLY USED IN DISPENSING FUEL FROM TANK,SEMITRAILER, end_item_identification: 2330-01-050-5633,GASOLINE TANKER, quick_disconnect_method: CAM-LOCKING. 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
634-B-21/2
NSN: 4730-01-019-7432
FSC: 4730
CAGE: 81718 — OPW FUELING COMPONENTS INC. DIV OPW FUELING COMPONENTS (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
overall_length2.250 INCHES NOMINAL IN
special_featuresPART OF THE PIPING CONTROL ASSEMBLY USED IN DISPENSING FUEL FROM TANK,SEMITRAILER
end_item_identification2330-01-050-5633,GASOLINE TANKER
quick_disconnect_methodCAM-LOCKING
NSN4730-01-019-7432
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 634-B-21/2 · 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 634-B-21/2?
634-B-21/2 is a CAP,QUICK DISCONNECT.
What parts can replace 634-B-21/2?
There are 26 known substitutes for 634-B-21/2: S3678, 10-03678, 801E1181 and 23 more. Substitute compatibility should be verified for your specific system.
Is 634-B-21/2 still available?
634-B-21/2 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: September 2026