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Technical Data Sheet
PartsTable / COMPONENT / A1-3/4
A1-3/4 ✓ 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 A1-3/4 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-821-1310, 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
A1-3/4
NSN: 4730-00-821-1310
FSC: 4730
CAGE: 54845 — HOIST LIFTRUCK MFG INC (USA)
SPECIFICATIONS
Part NumberA1-3/4
NSN4730-00-821-1310
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A1-3/4 · 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: STEEL BOLT
•
FASTENING DEVICE TYPE: SELF-LOCKING HEXAGON NUT
•
STYLE DESIGNATOR: WIRE
•
SURFACE TREATMENT: ZINC BOLT
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL BOLT
MATERIALSTEEL CORROSION RESISTING BAND
OVERALL WIDTH0.306 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN
FASTENING DEVICE TYPESELF-LOCKING HEXAGON NUT
STYLE DESIGNATORWIRE
SURFACE TREATMENTZINC BOLT
SURFACE TREATMENTPASSIVATE BAND
SURFACE TREATMENTZINC NUT
INSIDE DIAMETER1.350 INCHES MINIMUM AND 2.047 INCHES MAXIMUM IN
MATERIALSTEEL NUT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
AMS-QQ-A-200/11Interchangeable
interchangeable cross-reference
interchangeable
QQ-A-200/11Interchangeable
interchangeable cross-reference
interchangeable
15023Interchangeable
interchangeable cross-reference
interchangeable
A134Interchangeable
interchangeable cross-reference
interchangeable
030668Interchangeable
interchangeable cross-reference
interchangeable
A2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A1-3/4?
A1-3/4 is a A1-3/4.
What parts can replace A1-3/4?
There are 17 known substitutes for A1-3/4: AMS-QQ-A-200/11, QQ-A-200/11, 15023 and 14 more. Substitute compatibility should be verified for your specific system.
Is A1-3/4 still available?
A1-3/4 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