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Technical Data Sheet
PartsTable / COMPONENT / SMS-N4-1-20
SMS-N4-1-20 ✓ 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 NUT,UNION is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 1.437 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, shoulder_width: 0.240 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-061-0806, 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
SMS-N4-1-20
NSN: 4730-01-061-0806
FSC: 4730
CAGE: 57140 — SALEM MANUFACTURING & SALES INC DIV SALEM MANUFACTURING AND SALES INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height1.437 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
shoulder_width0.240 INCHES NOMINAL IN
thread_directionRIGHT-HAND
width_across_flats1.625 INCHES NOMINAL IN
nominal_thread_size1.500 INCHES IN
shoulder_step_width0.210 INCHES NOMINAL IN
shoulder_seat_diameter1.360 INCHES NOMINAL IN
smallest_inside_diameter1.070 INCHES NOMINAL IN
NSN4730-01-061-0806
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: SMS-N4-1-20 · 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
•
MATERIAL: STEEL OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 12
•
SHOULDER STEP WIDTH: 0.210 INCHES NOMINAL IN
•
SHOULDER SEAT DIAMETER: 1.360 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
SMALLEST INSIDE DIAMETER: 1.070 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 1.500 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH12
SHOULDER STEP WIDTH0.210 INCHES NOMINAL IN
SHOULDER SEAT DIAMETER1.360 INCHES NOMINAL IN
THREAD SERIESUNF
SMALLEST INSIDE DIAMETER1.070 INCHES NOMINAL IN
NOMINAL THREAD SIZE1.500 INCHES IN
NUT HEIGHT1.437 INCHES NOMINAL IN
WIDTH ACROSS FLATS1.625 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
85-2045Interchangeable
interchangeable cross-reference
interchangeable
15353Interchangeable
interchangeable cross-reference
interchangeable
65148Interchangeable
interchangeable cross-reference
interchangeable
107372PC406Interchangeable
interchangeable cross-reference
interchangeable
107266PC375Interchangeable
interchangeable cross-reference
interchangeable
60217BPC335Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SMS-N4-1-20?
SMS-N4-1-20 is a NUT,UNION.
What parts can replace SMS-N4-1-20?
There are 15 known substitutes for SMS-N4-1-20: 85-2045, 15353, 65148 and 12 more. Substitute compatibility should be verified for your specific system.
Is SMS-N4-1-20 still available?
SMS-N4-1-20 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026