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AN818-2D — ADAPTER,STRAIGHT,TUBE TO BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AN818-2D: ADAPTER,STRAIGHT,TUBE TO BOSS.

The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2014 AND ALUMINUM ALLOY 2024 AND ALUMINUM ALLOY 7075 OVERALL, nut_style: TUBE COUPLING, nut_height: 0.537 INCHES MINIMUM AND 0.547 INCHES MAXIMUM 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 4730-00-287-0291, 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
AN818-2D
NSN: 4730-00-287-0291
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 32142 — HYDRASEARCH COMPANY, LLC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2014 AND ALUMINUM ALLOY 2024 AND ALUMINUM ALLOY 7075 OVERALL
nut_styleTUBE COUPLING
nut_height0.537 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
thread_directionRIGHT-HAND
surface_treatmentANODIZE OVERALL
length_to_shoulder0.460 INCHES NOMINAL IN
width_across_flats0.371 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN
nominal_thread_size0.312 INCHES IN
smallest_inside_diameter0.180 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN
thread_quantity_per_inch24
NSN4730-00-287-0291
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN818-2D · 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
•
LENGTH TO SHOULDER: 0.460 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.371 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
NONDEFINITIVE SPEC/STD DATA: 818-2D PART
•
NUT HEIGHT: 0.537 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ANODIZE OVERALL
TECHNICAL CHARACTERISTICS
LENGTH TO SHOULDER0.460 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.371 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.312 INCHES IN
NONDEFINITIVE SPEC/STD DATA818-2D PART
NUT HEIGHT0.537 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE OVERALL
NUT STYLETUBE COUPLING
THREAD CLASS3B
SUBSTITUTES & CROSS-REFERENCES 7
SAE-AS4841Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS4841Reference document
Same NSN cross-reference
Reference document — Secondary reference
144682Reference document
Same NSN cross-reference
Reference document — Secondary reference
731857-102Reference document
Same NSN cross-reference
Reference document — Secondary reference
13078Reference document
Same NSN cross-reference
Reference document — Secondary reference
A818-2DReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AN818-2D?
AN818-2D is a ADAPTER,STRAIGHT,TUBE TO BOSS.
What parts can replace AN818-2D?
There are 7 known substitutes for AN818-2D: SAE-AS4841, AS4841, 144682 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AN818-2D?
AN818-2D is cataloged in the U.S. Government catalog under NSN 4730-00-287-0291. 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.