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B511281 — PLUG,GEARBOX

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

B511281: PLUG,GEARBOX.

The PLUG,GEARBOX is a the manufacturer industrial component. Key specifications include end_item_identification: ENGINE MODEL F-402, general_characteristics_item_description: ALUMINUM ALLOY; ANODIZE; 0.860 IN. MIN,0.870 IN.

MAX O/A OD; 0.500 IN. H; 0.250-28 UNF-2B THD ID IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-157-4680, 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
B511281
NSN: 4730-01-157-4680
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: K0378 — ROLLS-ROYCE PLC DIV DEFENSE (EUROPE) (GBR)
SPECIFICATIONS
end_item_identificationENGINE MODEL F-402
general_characteristics_item_descriptionALUMINUM ALLOY; ANODIZE; 0.860 IN. MIN,0.870 IN. MAX O/A OD; 0.500 IN. H; 0.250-28 UNF-2B THD ID IN
NSN4730-01-157-4680
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: B511281 · 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: ALUMINUM ALLOY; ANODIZE; 0.860 IN. MIN,0.870 IN. MAX O/A OD; 0.500 IN. H; 0.250-28 UNF-2B THD ID IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONALUMINUM ALLOY; ANODIZE; 0.860 IN. MIN,0.870 IN. MAX O/A OD; 0.500 IN. H; 0.250-28 UNF-2B THD ID IN
END ITEM IDENTIFICATIONENGINE MODEL F-402
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
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 B511281?
B511281 is a PLUG,GEARBOX.
What is the NSN for B511281?
B511281 is cataloged in the U.S. Government catalog under NSN 4730-01-157-4680. This indicates validated use in U.S. government and defense supply chains.
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