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12N70-20A — NUT ASSEMBLY,TUBE COUPLING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

12N70-20A: NUT ASSEMBLY,TUBE COUPLING.

The NUT ASSEMBLY,TUBE COUPLING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024, thread_size: 1.812-16, thread_class: 2B, overall_length: 0.496 INCHES NOMINAL IN, outside_diameter: 1.939 INCHES NOMINAL IN, special_features: SPRING LOCKING FEATURE. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-198-9673, 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
12N70-20A
NSN: 4730-01-198-9673
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 24984 — HYDRAFLOW (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024
thread_size1.812-16
thread_class2B
overall_length0.496 INCHES NOMINAL IN
outside_diameter1.939 INCHES NOMINAL IN
special_featuresSPRING LOCKING FEATURE
style_designatorNUT ASSEMBLY
thread_directionRIGHT-HAND
surface_treatmentANODIZE
screw_thread_series_designatorUN
tube_outside_diameter_for_which_designed1.250 INCHES NOMINAL IN
NSN4730-01-198-9673
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 12N70-20A · 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
•
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED: 1.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NUT ASSEMBLY
•
OUTSIDE DIAMETER: 1.939 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD SIZE: 1.812-16
•
SCREW THREAD SERIES DESIGNATOR: UN
TECHNICAL CHARACTERISTICS
TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED1.250 INCHES NOMINAL IN
STYLE DESIGNATORNUT ASSEMBLY
OVERALL LENGTH0.496 INCHES NOMINAL IN
OUTSIDE DIAMETER1.939 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD SIZE1.812-16
SPECIAL FEATURESSPRING LOCKING FEATURE
SCREW THREAD SERIES DESIGNATORUN
SURFACE TREATMENTANODIZE
THREAD CLASS2B
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 3
ST7M170Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
10108955Reference document
Same NSN cross-reference
Reference document — Informative reference only
ST7M170-20DSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 12N70-20A?
12N70-20A is a NUT ASSEMBLY,TUBE COUPLING.
What parts can replace 12N70-20A?
There are 3 known substitutes for 12N70-20A: ST7M170, 10108955, ST7M170-20D. Substitute compatibility should be verified for your specific system.
What is the NSN for 12N70-20A?
12N70-20A is cataloged in the U.S. Government catalog under NSN 4730-01-198-9673. 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.