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MILF5509A — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MILF5509A: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 7075 OVERALL, nut_style: TUBE COUPLING, nut_height: 0.620 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-187-3600, 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
MILF5509A
NSN: 4730-00-187-3600
NIINs: 001873600, 002033831, 002311324, 002313027, 002483198, 002776451, 002789463, 002790778, 002870029, 002870093, 002870094, 002870098, 002870101, 002870102, 002870103, 002870105, 002870109, 002870111, 002870112, 002870115, 002870116, 002870122, 002870124, 002870270, 002870271, 002870272, 002870273, 002870274, 002870276, 002870285, 002870289, 002870290, 002870294, 002870352, 002870461, 002870464, 002870550, 002870554, 002872179, 002872182, 002872184, 002872372, 002873713, 002873714, 002892770, 005400720, 005414263, 005852305, 005950450, 005951074, 005951746, 006063825, 006135083, 006188594, 006188645, 006846911, 006847412, 006847452, 007268781, 007274717, 008009869, 008029319, 008035054, 008037351, 008038219, 008041894, 008041900, 008041933, 008041934, 008041936, 008049312, 008051403, 008051405, 008051406, 008054518, 008055097, 008055100, 008056024, 008056646, 008661829, 010545078, 012904913
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialALUMINUM ALLOY 7075 OVERALL
nut_styleTUBE COUPLING
nut_height0.620 INCHES NOMINAL IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
thread_directionRIGHT-HAND
fabrication_methodMACHINED
length_to_shoulder0.532 INCHES NOMINAL IN
width_across_flats0.563 INCHES NOMINAL IN
nominal_thread_size0.437 INCHES IN
end_item_identificationA4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
smallest_inside_diameter0.305 INCHES NOMINAL IN
NSN4730-00-187-3600
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MILF5509A · 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
•
CONNECTION STYLE: FLARED W/ GASKET SEAL (BOSS) ALL ENDS
•
NOMINAL OVERALL LENGTH: 1.406 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL BOSS ALL ENDS
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 0.438 INCHES SECOND END IN
•
SPECIFICATION/STANDARD DATA: 88044-AN919 GOVERNMENT STANDARD
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS
CONNECTION STYLEFLARED W/ GASKET SEAL (BOSS) ALL ENDS
NOMINAL OVERALL LENGTH1.406 INCHES IN
CONNECTION TYPETHREADED EXTERNAL BOSS ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD SIZE0.438 INCHES SECOND END IN
NOMINAL THREAD SIZE0.562 INCHES FIRST END IN
SPECIFICATION/STANDARD DATA88044-AN919 GOVERNMENT STANDARD
SURFACE TREATMENTCADMIUM OVERALL
THREAD CLASS3A ALL ENDS A
END ITEM IDENTIFICATIONA4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
SUBSTITUTES & CROSS-REFERENCES 6
AS5174-0604Reference document
Same NSN cross-reference
Reference document — Secondary reference
AN919-6Reference document
Same NSN cross-reference
Reference document — Secondary reference
451-0468Reference document
Same NSN cross-reference
Reference document — Secondary reference
A919-6Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS24399-7Reference document
Same NSN cross-reference
Reference document — Secondary reference
6-4 070101CAReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MILF5509A?
MILF5509A is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace MILF5509A?
There are 6 known substitutes for MILF5509A: AS5174-0604, AN919-6, 451-0468 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILF5509A?
MILF5509A is cataloged in the U.S. Government catalog under NSN 4730-00-187-3600. 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.