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PartsTable / COMPONENT / A74-1
A74-1 ✓ 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

LOCK,COMPRESSOR BLADE,AIRCRAFT G. Key specifications include material: COPPER ALLOY OVERALL, body_length: 0.208 INCHES NOMINAL IN, corner_shape: SQUARE ALL CORNERS, thread_class: 2A FIRST END BULKHEAD A, overall_length: 0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN, connection_type: THREADED INTERNAL PIPE ALL ENDS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-6319, 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
A74-1
NSN: 4730-00-278-6319
FSC: 4730
CAGE: 03533 — CRANE CARRIER COMPANY, LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
body_length0.208 INCHES NOMINAL IN
corner_shapeSQUARE ALL CORNERS
thread_class2A FIRST END BULKHEAD A
overall_length0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorTHREADED INTERNAL
features_providedHERMETICALLY SEALED
inclosure_materialMETAL
operating_pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
nominal_thread_size0.250 INCHES ALL ENDS IN
NSN4730-00-278-6319
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A74-1 · 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 25
20546-5Interchangeable
interchangeable cross-reference
interchangeable
269305-5Interchangeable
interchangeable cross-reference
interchangeable
30606Interchangeable
interchangeable cross-reference
interchangeable
700406-02-0001Interchangeable
interchangeable cross-reference
interchangeable
10827Interchangeable
interchangeable cross-reference
interchangeable
23343FInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A74-1?
A74-1 is a LOCK,COMPRESSOR BLADE,AIRCRAFT G.
What parts can replace A74-1?
There are 25 known substitutes for A74-1: 20546-5, 269305-5, 30606 and 22 more. Substitute compatibility should be verified for your specific system.
Is A74-1 still available?
A74-1 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