PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 581-6405749
581-6405749 ✓ 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 GEAR ASSEMBLY,SPEED INCREASER is a the manufacturer industrial component. Key specifications include criticality_code_justification: ZZZY. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-707-3068, 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
581-6405749
NSN: 4730-00-707-3068
FSC: 4730
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsQUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR SUBSAFE ITEMS
NSN4730-00-707-3068
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 581-6405749 · 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
•
SHANK LENGTH: 0.227 INCHES MINIMUM AND 0.289 INCHES MAXIMUM IN
•
HEIGHT: 0.269 INCHES MINIMUM AND 0.331 INCHES MAXIMUM IN
•
SURFACE TREATMENT: NICKEL OR CADMIUM OVERALL
•
STYLE DESIGNATOR: STRAIGHT, W/BALL CHECK, W/SHOULDER
•
NONDEFINITIVE SPEC/STD DATA: G TYPE AND 1 SIZE
•
MATERIAL: STEEL OVERALL
•
OIL CAPACITY: 0.002 FLUID OUNCES
•
SHANK DIAMETER: 0.190 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SHANK LENGTH0.227 INCHES MINIMUM AND 0.289 INCHES MAXIMUM IN
HEIGHT0.269 INCHES MINIMUM AND 0.331 INCHES MAXIMUM IN
SURFACE TREATMENTNICKEL OR CADMIUM OVERALL
STYLE DESIGNATORSTRAIGHT, W/BALL CHECK, W/SHOULDER
NONDEFINITIVE SPEC/STD DATAG TYPE AND 1 SIZE
MATERIALSTEEL OVERALL
OIL CAPACITY0.002 FLUID OUNCES
SHANK DIAMETER0.190 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
ASSEMBLY CLEARANCE RADIUS0.101 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
3-66391Interchangeable
interchangeable cross-reference
interchangeable
00520Interchangeable
interchangeable cross-reference
interchangeable
Q2421Interchangeable
interchangeable cross-reference
interchangeable
X-2054Interchangeable
interchangeable cross-reference
interchangeable
MILC1258Interchangeable
interchangeable cross-reference
interchangeable
600B-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 581-6405749?
581-6405749 is a GEAR ASSEMBLY,SPEED INCREASER.
What parts can replace 581-6405749?
There are 21 known substitutes for 581-6405749: 3-66391, 00520, Q2421 and 18 more. Substitute compatibility should be verified for your specific system.
Is 581-6405749 still available?
581-6405749 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