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7649351 ✓ 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 LOCKNUT,TUBE FITTING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1141 OVERALL, nut_style: TUBE FITTING LOCKNUT, nut_height: 0.297 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, special_features: USED ON GRUMMAN A10 AIRCRAFT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-277-5084, 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
7649351
NSN: 4730-00-277-5084
FSC: 4730
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 1141 OVERALL
nut_styleTUBE FITTING LOCKNUT
nut_height0.297 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
special_featuresUSED ON GRUMMAN A10 AIRCRAFT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.812 INCHES NOMINAL IN
nominal_thread_size0.562 INCHES IN
packing_recess_depth0.042 INCHES NOMINAL IN
end_item_identification2350-01-031-8851
NSN4730-00-277-5084
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 7649351 · 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
•
PACKING RECESS DIAMETER: 0.733 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 18
•
THREAD DIRECTION: RIGHT-HAND
•
MATERIAL DOCUMENT AND CLASSIFICATION: 11-S-637,COMP 1141 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
WIDTH ACROSS FLATS: 0.812 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 1141 OVERALL
•
THREAD CLASS: 3B
•
PACKING RECESS DEPTH: 0.042 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
PACKING RECESS DIAMETER0.733 INCHES NOMINAL IN
THREAD QUANTITY PER INCH18
THREAD DIRECTIONRIGHT-HAND
MATERIAL DOCUMENT AND CLASSIFICATION11-S-637,COMP 1141 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
WIDTH ACROSS FLATS0.812 INCHES NOMINAL IN
MATERIALSTEEL COMP 1141 OVERALL
THREAD CLASS3B
PACKING RECESS DEPTH0.042 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.562 INCHES IN
END ITEM IDENTIFICATION2350-01-031-8851
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
G705P136Interchangeable
interchangeable cross-reference
interchangeable
120541Interchangeable
interchangeable cross-reference
interchangeable
153-100Interchangeable
interchangeable cross-reference
interchangeable
12054Interchangeable
interchangeable cross-reference
interchangeable
360077-1/K PG.12, 5.2 LABEL DInterchangeable
interchangeable cross-reference
interchangeable
AS4841Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7649351?
7649351 is a LOCKNUT,TUBE FITTING.
What parts can replace 7649351?
There are 12 known substitutes for 7649351: G705P136, 120541, 153-100 and 9 more. Substitute compatibility should be verified for your specific system.
Is 7649351 still available?
7649351 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