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Technical Data Sheet
PartsTable / COMPONENT / 40559-16H
40559-16H ✓ 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 PARTS KIT,HOUSING,IDLER is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: TUBE COUPLING, nut_height: 1.158 INCHES NOMINAL IN, seat_angle: 33.0 DEGREES NOMINAL, lubrication: DRY FILM LUBRICANT, thread_class: 3B. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-255-5282, 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
40559-16H
NSN: 4730-01-255-5282
FSC: 4730
CAGE: 77969 — RUBBERCRAFT CORPORATION OF CALIFORNIA, LTD. DBA RUBBERCRAFT CORP (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleTUBE COUPLING
nut_height1.158 INCHES NOMINAL IN
seat_angle33.0 DEGREES NOMINAL
lubricationDRY FILM LUBRICANT
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT (UNJ)
special_featuresHEXAGON NUT DRILLED FOR 1.000 IN. TUBE; LUBRICANT DRY FILM OVERALL IN
thread_directionRIGHT-HAND
length_to_shoulder0.907 INCHES NOMINAL IN
width_across_flats1.125 INCHES NOMINAL IN
nominal_thread_size1.312 INCHES IN
NSN4730-01-255-5282
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 40559-16H · 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
•
THREAD QUANTITY PER INCH: 12
•
MATERIAL DOCUMENT AND CLASSIFICATION: NAS597 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
WIDTH ACROSS FLATS: 1.125 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT (UNJ)
•
NUT STYLE: TUBE COUPLING
•
NUT HEIGHT: 1.158 INCHES NOMINAL IN
•
SMALLEST INSIDE DIAMETER: 1.020 INCHES NOMINAL IN
•
SEAT ANGLE: 33.0 DEGREES NOMINAL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH12
MATERIAL DOCUMENT AND CLASSIFICATIONNAS597 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
WIDTH ACROSS FLATS1.125 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL JOINT (UNJ)
NUT STYLETUBE COUPLING
NUT HEIGHT1.158 INCHES NOMINAL IN
SMALLEST INSIDE DIAMETER1.020 INCHES NOMINAL IN
SEAT ANGLE33.0 DEGREES NOMINAL
THREAD CLASS3B
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
90077Interchangeable
interchangeable cross-reference
interchangeable
5T3147Interchangeable
interchangeable cross-reference
interchangeable
05-0016Interchangeable
interchangeable cross-reference
interchangeable
3710Interchangeable
interchangeable cross-reference
interchangeable
AP727-16HInterchangeable
Same NIIN cross-reference
interchangeable
FL82-16HInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40559-16H?
40559-16H is a PARTS KIT,HOUSING,IDLER.
What parts can replace 40559-16H?
There are 7 known substitutes for 40559-16H: 90077, 5T3147, 05-0016 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 40559-16H?
40559-16H is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-255-5282. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026