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AN818-40 ✓ 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

The JACKSCREW,ELECTRICAL CONNECTOR is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, nut_style: TUBE COUPLING, nut_height: 0.620 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, special_features: WEAPON SYSTEM ESSENTIAL. GRUMMAN A-10 AIRCRAFT.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-193-8117, 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
AN818-40
NSN: 4730-00-193-8117
FSC: 4730
CAGE: 71563 — COLLINS ENGINEERING CORP (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
nut_styleTUBE COUPLING
nut_height0.620 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
special_featuresWEAPON SYSTEM ESSENTIAL. GRUMMAN A-10 AIRCRAFT
thread_directionRIGHT-HAND
surface_treatmentANODIZE OVERALL
length_to_shoulder0.532 INCHES NOMINAL IN
width_across_flats0.563 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
end_item_identificationB-1 AIRCRAFT SUPPORT EQUIPMENT. B-52 AIRCRAFT SUPPORT EQUIPMENT. TF33-P-3/5/9 (C/EC-135, B-52H) AIRCRAFT ENGINE. H-3 HELICOPTER SUPPORT EQUIPMENT.
NSN4730-00-193-8117
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AN818-40 · 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
•
NOMINAL TUBE OUTSIDE DIAMETER: 2.500 INCHES IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT (UNJ)
•
NOMINAL THREAD SIZE: 3.000 INCHES IN
•
SMALLEST INSIDE DIAMETER: 2.667 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 12
•
MATERIAL: STEEL COMP 1137 OR STEEL COMP 1141 OVERALL
•
LENGTH TO SHOULDER: 1.328 INCHES NOMINAL IN
•
NUT HEIGHT: 1.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL TUBE OUTSIDE DIAMETER2.500 INCHES IN
THREAD SERIESUNIFIED NATIONAL JOINT (UNJ)
NOMINAL THREAD SIZE3.000 INCHES IN
SMALLEST INSIDE DIAMETER2.667 INCHES NOMINAL IN
THREAD QUANTITY PER INCH12
MATERIALSTEEL COMP 1137 OR STEEL COMP 1141 OVERALL
LENGTH TO SHOULDER1.328 INCHES NOMINAL IN
NUT HEIGHT1.625 INCHES NOMINAL IN
WIDTH ACROSS FLATS3.375 INCHES NOMINAL IN
NUT STYLETUBE COUPLING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
3110242Interchangeable
interchangeable cross-reference
interchangeable
AN818-4DInterchangeable
interchangeable cross-reference
interchangeable
C8175450Interchangeable
interchangeable cross-reference
interchangeable
AS4841Interchangeable
Same NIIN cross-reference
interchangeable
SAE-AS4841Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN818-40?
AN818-40 is a JACKSCREW,ELECTRICAL CONNECTOR.
What parts can replace AN818-40?
There are 5 known substitutes for AN818-40: 3110242, AN818-4D, C8175450 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AN818-40?
AN818-40 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-193-8117. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026