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AA67051-20K — LOCKNUT,TUBE FITTING

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

AA67051-20K: LOCKNUT,TUBE FITTING.

The LOCKNUT,TUBE FITTING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316 OVERALL, nut_style: TUBE FITTING LOCKNUT, nut_height: 0.406 INCHES NOMINAL IN, thread_class: 2B, thread_series: UN, width_across_flats: 1.922 INCHES MINIMUM AND 1.954 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-271-9601, 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
AA67051-20K
NSN: 4730-01-271-9601
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 06581 — ALLAN AIRCRAFT SUPPLY CO., LLC DBA ALLAN AIRCRAFT SUPPLY (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OVERALL
nut_styleTUBE FITTING LOCKNUT
nut_height0.406 INCHES NOMINAL IN
thread_class2B
thread_seriesUN
width_across_flats1.922 INCHES MINIMUM AND 1.954 INCHES MAXIMUM IN
nominal_thread_size1.625 INCHES IN
thread_quantity_per_inch12
nominal_tube_outside_diameter1.250 INCHES IN
NSN4730-01-271-9601
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: AA67051-20K · 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
•
WIDTH ACROSS FLATS: 1.922 INCHES MINIMUM AND 1.954 INCHES MAXIMUM IN
•
THREAD SERIES: UN
•
NOMINAL THREAD SIZE: 1.625 INCHES IN
•
NUT HEIGHT: 0.406 INCHES NOMINAL IN
•
NUT STYLE: TUBE FITTING LOCKNUT
•
THREAD CLASS: 2B
•
THREAD QUANTITY PER INCH: 12
•
MATERIAL: STEEL COMP 316 OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.922 INCHES MINIMUM AND 1.954 INCHES MAXIMUM IN
THREAD SERIESUN
NOMINAL THREAD SIZE1.625 INCHES IN
NUT HEIGHT0.406 INCHES NOMINAL IN
NUT STYLETUBE FITTING LOCKNUT
THREAD CLASS2B
THREAD QUANTITY PER INCH12
MATERIALSTEEL COMP 316 OVERALL
NOMINAL TUBE OUTSIDE DIAMETER1.250 INCHES IN
SUBSTITUTES & CROSS-REFERENCES 1
232-00070Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AA67051-20K?
AA67051-20K is a LOCKNUT,TUBE FITTING.
What parts can replace AA67051-20K?
There is 1 known substitute for AA67051-20K: 232-00070. Substitute compatibility should be verified for your specific system.
What is the NSN for AA67051-20K?
AA67051-20K is cataloged in the U.S. Government catalog under NSN 4730-01-271-9601. 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.