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512239 — ACTUATOR,LIMIT SWITCH

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

512239: ACTUATOR,LIMIT SWITCH.

The ACTUATOR,LIMIT SWITCH is a the manufacturer industrial component. Key specifications include end_item_identification: LOADER MARK 2 MOD 4,50 CALIBER TWIN MOUNT,NAVAL ORD SYSTEMS. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-071-6839, 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
512239
NSN: 4730-00-071-6839
NIINs: 000716839, 003444975, 003796258, 006923207
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
end_item_identificationLOADER MARK 2 MOD 4,50 CALIBER TWIN MOUNT,NAVAL ORD SYSTEMS
general_characteristics_item_descriptionSTEEL,MIL-S-890 CL,B OR BS; C TO C FROM PIVOT HOLE TO PIN HOLE,FORK END 1.125 IN.; 1/2 IN W AT FORK END;OPPOSITE END 7/16 IN.W IN
NSN4730-00-071-6839
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 512239 · 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
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GENERAL CHARACTERISTICS ITEM DESCRIPTION: CRES AMS 5646;1.800 IN. LG O/A;0.900 IN. OD,0.840 IN. ID TUBE CONNECTING END;0.851 IN. OD 0.680 IN. ID PACKING END;TWO 0.095 IN. W PACKING GROOVES;0.740 IN. LG GROOVED END TO SHOULDER;TUBE END CASEHARDENED IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONCRES AMS 5646;1.800 IN. LG O/A;0.900 IN. OD,0.840 IN. ID TUBE CONNECTING END;0.851 IN. OD 0.680 IN. ID PACKING END;TWO 0.095 IN. W PACKING GROOVES;0.740 IN. LG GROOVED END TO SHOULDER;TUBE END CASEHARDENED IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 512239?
512239 is a ACTUATOR,LIMIT SWITCH.
What is the NSN for 512239?
512239 is cataloged in the U.S. Government catalog under NSN 4730-00-071-6839. 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.