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AS5175W20L — NUT,TUBE COUPLING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AS5175W20L: NUT,TUBE COUPLING.

The NUT,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: UNABLE TO DECODE, nut_style: TUBE COUPLING, nut_height: 1.214 INCHES MINIMUM AND 1.234 INCHES MAXIMUM IN, seat_angle: 85.0 DEGREES MINIMUM AND 95.0 DEGREES MAXIMUM, thread_series: UNIFIED NATIONAL JOINT (UNJ), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-731-2170, 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
AS5175W20L
NSN: 4730-01-731-2170
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
materialUNABLE TO DECODE
nut_styleTUBE COUPLING
nut_height1.214 INCHES MINIMUM AND 1.234 INCHES MAXIMUM IN
seat_angle85.0 DEGREES MINIMUM AND 95.0 DEGREES MAXIMUM
thread_seriesUNIFIED NATIONAL JOINT (UNJ)
thread_directionRIGHT-HAND
surface_treatmentUNABLE TO DECODE
length_to_shoulder0.813 INCHES MAXIMUM IN
width_across_flats1.982 INCHES MINIMUM AND 2.005 INCHES MAXIMUM IN
nominal_thread_size1.6250 INCHES IN
end_item_identificationH-53K
smallest_inside_diameter1.347 INCHES MINIMUM AND 1.350 INCHES MAXIMUM IN
NSN4730-01-731-2170
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AS5175W20L · 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: 0.813 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 1.982 INCHES MINIMUM AND 2.005 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT (UNJ)
•
SEAT ANGLE: 85.0 DEGREES MINIMUM AND 95.0 DEGREES MAXIMUM
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 1.6250 INCHES IN
•
NUT HEIGHT: 1.214 INCHES MINIMUM AND 1.234 INCHES MAXIMUM IN
•
SURFACE TREATMENT: UNABLE TO DECODE
TECHNICAL CHARACTERISTICS
LENGTH TO SHOULDER0.813 INCHES MAXIMUM IN
WIDTH ACROSS FLATS1.982 INCHES MINIMUM AND 2.005 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL JOINT (UNJ)
SEAT ANGLE85.0 DEGREES MINIMUM AND 95.0 DEGREES MAXIMUM
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE1.6250 INCHES IN
NUT HEIGHT1.214 INCHES MINIMUM AND 1.234 INCHES MAXIMUM IN
SURFACE TREATMENTUNABLE TO DECODE
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT, COUPLING, FLARE
NUT STYLETUBE COUPLING
SUBSTITUTES & CROSS-REFERENCES 1
AS5175Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AS5175W20L?
AS5175W20L is a NUT,TUBE COUPLING.
What parts can replace AS5175W20L?
There is 1 known substitute for AS5175W20L: AS5175. Substitute compatibility should be verified for your specific system.
What is the NSN for AS5175W20L?
AS5175W20L is cataloged in the U.S. Government catalog under NSN 4730-01-731-2170. 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.