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581-6405749 — GEAR ASSEMBLY,SPEED INCREASER

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

581-6405749: GEAR ASSEMBLY,SPEED INCREASER.

The GEAR ASSEMBLY,SPEED INCREASER is a the manufacturer industrial component. Key specifications include criticality_code_justification: ZZZY. This part is cataloged in the U.S.

Government catalog 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
NIINs: 007073068, 014481117, 016602322
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
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 DIAMETER: 0.190 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
•
ASSEMBLY CLEARANCE RADIUS: 0.101 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN
•
SHANK LENGTH: 0.227 INCHES MINIMUM AND 0.289 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: STRAIGHT, W/BALL CHECK, W/SHOULDER
•
NONDEFINITIVE SPEC/STD DATA: G TYPE AND 1 SIZE
•
OIL CAPACITY: 0.002 FLUID OUNCES
•
HEIGHT: 0.269 INCHES MINIMUM AND 0.331 INCHES MAXIMUM IN
•
SURFACE TREATMENT: NICKEL OR CADMIUM OVERALL
TECHNICAL CHARACTERISTICS
SHANK DIAMETER0.190 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
ASSEMBLY CLEARANCE RADIUS0.101 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN
SHANK LENGTH0.227 INCHES MINIMUM AND 0.289 INCHES MAXIMUM IN
STYLE DESIGNATORSTRAIGHT, W/BALL CHECK, W/SHOULDER
NONDEFINITIVE SPEC/STD DATAG TYPE AND 1 SIZE
OIL CAPACITY0.002 FLUID OUNCES
HEIGHT0.269 INCHES MINIMUM AND 0.331 INCHES MAXIMUM IN
SURFACE TREATMENTNICKEL OR CADMIUM OVERALL
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 9
581-6405749 FIND AHDA B41Reference document
Same NSN cross-reference
Reference document — Secondary reference
00520Reference document
Same NSN cross-reference
Reference document — Secondary reference
407256Reference document
Same NSN cross-reference
Reference document — Secondary reference
4730007073068Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS35755-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
520Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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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 9 known substitutes for 581-6405749: 581-6405749 FIND AHDA B41, 00520, 407256 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 581-6405749?
581-6405749 is cataloged in the U.S. Government catalog under NSN 4730-00-707-3068. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.