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Technical Data Sheet
PartsTable / COMPONENT / 634A-3/4AL
634A-3/4AL ✓ 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 634A-3/4AL is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-212-5809, 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
634A-3/4AL
NSN: 4730-01-212-5809
FSC: 4730
CAGE: 81718 — OPW FUELING COMPONENTS INC. DIV OPW FUELING COMPONENTS (USA)
SPECIFICATIONS
Part Number634A-3/4AL
NSN4730-01-212-5809
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 634A-3/4AL · 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
•
MATERIAL: ALUMINUM ALLOY BODY
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TY2 CL1 MIL SPEC SINGLE TREATMENT RESPONSE BODY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-601,T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-601,T5 FED SPEC 2ND MATERIAL RESPONSE BODY
•
SURFACE TREATMENT: ANODIZE BODY
•
QUICK DISCONNECT METHOD: CAM-LOCKING
•
QUICK DISCONNECT NOMINAL SIZE: 0.750 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALALUMINUM ALLOY BODY
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY2 CL1 MIL SPEC SINGLE TREATMENT RESPONSE BODY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-601,T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-601,T5 FED SPEC 2ND MATERIAL RESPONSE BODY
SURFACE TREATMENTANODIZE BODY
QUICK DISCONNECT METHODCAM-LOCKING
QUICK DISCONNECT NOMINAL SIZE0.750 INCHES IN
OVERALL LENGTH0.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 36
AA59326/11-10Interchangeable
interchangeable cross-reference
interchangeable
634-A-0190Interchangeable
interchangeable cross-reference
interchangeable
634-A-6IN-ALInterchangeable
interchangeable cross-reference
interchangeable
AA59326X13Interchangeable
interchangeable cross-reference
interchangeable
100-DP-ALInterchangeable
interchangeable cross-reference
interchangeable
8611332-151Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 634A-3/4AL?
634A-3/4AL is a 634A-3/4AL.
What parts can replace 634A-3/4AL?
There are 36 known substitutes for 634A-3/4AL: AA59326/11-10, 634-A-0190, 634-A-6IN-AL and 33 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 634A-3/4AL?
634A-3/4AL is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-212-5809. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026