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A51K9035-3 — HOUSING,FILTER BY-PASS VALVE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

A51K9035-3: HOUSING,FILTER BY-PASS VALVE.

The HOUSING,FILTER BY-PASS VALVE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 6061 OVERALL, connection_type: THREADED INTERNAL BOSS ALL ENDS, connection_style: GASKET SEAL (BOSS) ALL ENDS, special_features: TWO LOCKWIRE HOLES IN BODY 0.060 IN. MAX DIA IN, surface_treatment: ANODIZE OVERALL, nominal_overall_length: 1.650 INCHES IN.

This part is cataloged in the U.S. Government catalog under NSN 4730-00-208-1780, 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
A51K9035-3
NSN: 4730-00-208-1780
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
connection_typeTHREADED INTERNAL BOSS ALL ENDS
connection_styleGASKET SEAL (BOSS) ALL ENDS
special_featuresTWO LOCKWIRE HOLES IN BODY 0.060 IN. MAX DIA IN
surface_treatmentANODIZE OVERALL
nominal_overall_length1.650 INCHES IN
material_document_and_classificationQQ-A-225/8,T651 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-A-8625,TYPE 2,CLASS 2,DYED BLACK MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN4730-00-208-1780
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A51K9035-3 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TYPE 2,CLASS 2,DYED BLACK MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
CONNECTION STYLE: GASKET SEAL (BOSS) ALL ENDS
•
NOMINAL OVERALL LENGTH: 1.650 INCHES IN
•
CONNECTION TYPE: THREADED INTERNAL BOSS ALL ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/8,T651 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT: ANODIZE OVERALL
•
MATERIAL: ALUMINUM ALLOY 6061 OVERALL
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 2,CLASS 2,DYED BLACK MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
CONNECTION STYLEGASKET SEAL (BOSS) ALL ENDS
NOMINAL OVERALL LENGTH1.650 INCHES IN
CONNECTION TYPETHREADED INTERNAL BOSS ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/8,T651 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SPECIAL FEATURESTWO LOCKWIRE HOLES IN BODY 0.060 IN. MAX DIA IN
SURFACE TREATMENTANODIZE OVERALL
MATERIALALUMINUM ALLOY 6061 OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
21602-1Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51K9035-3?
A51K9035-3 is a HOUSING,FILTER BY-PASS VALVE.
What parts can replace A51K9035-3?
There is 1 known substitute for A51K9035-3: 21602-1. Substitute compatibility should be verified for your specific system.
What is the NSN for A51K9035-3?
A51K9035-3 is cataloged in the U.S. Government catalog under NSN 4730-00-208-1780. 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.