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581R609H12 ✓ 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

SEAL,CONICAL,FLARED TUBE FITTING. Key specifications include material: COPPER ALLOY 130, body_length: 0.302 INCHES NOMINAL IN, overall_length: 0.500 INCHES NOMINAL IN, wall_thickness: 0.005 INCHES NOMINAL IN, outside_diameter: 0.317 INCHES NOMINAL IN, special_features: L AFTER DASH NUMBER WILL BE LOX CLEANED AND PACKAGED IN ACCORDANCE WITH MAC SPEC 27M100. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-071-9126, 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
581R609H12
NSN: 4730-01-071-9126
FSC: 4730
CAGE: 18323 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA ELECTRONIC SYSTEMS (USA)
SPECIFICATIONS
materialCOPPER ALLOY 130
body_length0.302 INCHES NOMINAL IN
overall_length0.500 INCHES NOMINAL IN
wall_thickness0.005 INCHES NOMINAL IN
outside_diameter0.317 INCHES NOMINAL IN
special_featuresL AFTER DASH NUMBER WILL BE LOX CLEANED AND PACKAGED IN ACCORDANCE WITH MAC SPEC 27M100
style_designatorSEAL
seat_angle_in_deg37.0
surface_treatmentTIN
casehardening_indicatorNOT CASEHARDENED
end_item_identificationBEN MISSILE; ALL-WEATHER; ANTI-SHIP, HARPOON (AGM-84)
metallic_hardness_rating65.0 MAXIMUM ROCKWELL F
NSN4730-01-071-9126
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 581R609H12 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
7827256Interchangeable
interchangeable cross-reference
interchangeable
AP50Interchangeable
interchangeable cross-reference
interchangeable
581R609Interchangeable
interchangeable cross-reference
interchangeable
VSF1015Interchangeable
Same NIIN cross-reference
interchangeable
DY90-A-24Interchangeable
Same NIIN cross-reference
interchangeable
VSF1015A-24BInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 581R609H12?
581R609H12 is a SEAL,CONICAL,FLARED TUBE FITTING.
What parts can replace 581R609H12?
There are 7 known substitutes for 581R609H12: 7827256, AP50, 581R609 and 4 more. Substitute compatibility should be verified for your specific system.
Is 581R609H12 still available?
581R609H12 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