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355.25A — PACKING NUT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

355.25A: PACKING NUT.

The PACKING NUT is a the manufacturer industrial component. Key specifications include end_item_identification: MODEL TV-3700 ONE AND ONE HALF INCH 3 WAY SOLENOID TRIP VALVE, stem_actuating_end_type: THREADED EXTERNALLY, valve_size_for_which_designed: 1.500 INCHES IN, valve_model_number_for_which_designed: TV-3700. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-022-9512, 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
355.25A
NSN: 4730-01-022-9512
NIINs: 010229512, 015592730
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 05073 — BABCOCK & WILCOX CO (USA)
SPECIFICATIONS
end_item_identificationMODEL TV-3700 ONE AND ONE HALF INCH 3 WAY SOLENOID TRIP VALVE
stem_actuating_end_typeTHREADED EXTERNALLY
valve_size_for_which_designed1.500 INCHES IN
valve_model_number_for_which_designedTV-3700
NSN4730-01-022-9512
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 355.25A · 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: 2.000 INCHES NOMINAL IN
•
THREAD LENGTH: 0.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: IRREGULAR
•
THREAD DIRECTION: RIGHT-HAND
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
THREAD SIZE: 2.000-11-1/2
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS2.000 INCHES NOMINAL IN
THREAD LENGTH0.250 INCHES NOMINAL IN
STYLE DESIGNATORIRREGULAR
OVERALL LENGTH0.250 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
CASEHARDENING INDICATORNOT CASEHARDENED
THREAD SIZE2.000-11-1/2
SPECIAL FEATURESFOUR 0.125 IN. DIA HOLES,0.062 IN. DEEP,EQUALLY SPACED 1.625 IN. CTOC IN
SCREW THREAD SERIES DESIGNATORUNS
THREAD CLASS3A A
SUBSTITUTES & CROSS-REFERENCES 2
7003126Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
5463EPC165Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 355.25A?
355.25A is a PACKING NUT.
What parts can replace 355.25A?
There are 2 known substitutes for 355.25A: 7003126, 5463EPC165. Substitute compatibility should be verified for your specific system.
What is the NSN for 355.25A?
355.25A is cataloged in the U.S. Government catalog under NSN 4730-01-022-9512. 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.