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6758238 — NUT,UNION

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

6758238: NUT,UNION.

The NUT,UNION is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, nut_style: HEXAGON, nut_height: 1.234 INCHES MINIMUM AND 1.266 INCHES MAXIMUM IN, temp_rating: 125.0 FAHRENHEIT NOMINAL DEGF, thread_class: 2B, thread_series: UNS. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-434-6672, 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
6758238
NSN: 4730-01-434-6672
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
nut_styleHEXAGON
nut_height1.234 INCHES MINIMUM AND 1.266 INCHES MAXIMUM IN
temp_rating125.0 FAHRENHEIT NOMINAL DEGF
thread_class2B
thread_seriesUNS
shoulder_width0.250 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
width_across_flats2.734 INCHES MINIMUM AND 2.766 INCHES MAXIMUM IN
nominal_thread_size2.312 INCHES IN
shoulder_step_width0.312 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
shoulder_seat_diameter2.317 INCHES MINIMUM AND 2.327 INCHES MAXIMUM IN
NSN4730-01-434-6672
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6758238 · 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: 2.734 INCHES MINIMUM AND 2.766 INCHES MAXIMUM IN
•
SHOULDER STEP WIDTH: 0.312 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
•
SHOULDER WIDTH: 0.250 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
•
THREAD SERIES: UNS
•
TEMP RATING: 125.0 FAHRENHEIT NOMINAL DEGF
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MAXIMUM WORKING PRESSURE RATING AND SERVICE FOR WHICH DESIGNED: 3000.0 POUNDS PER SQUARE INCH (PSI) WATER LBS
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS2.734 INCHES MINIMUM AND 2.766 INCHES MAXIMUM IN
SHOULDER STEP WIDTH0.312 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
SHOULDER WIDTH0.250 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN
THREAD SERIESUNS
TEMP RATING125.0 FAHRENHEIT NOMINAL DEGF
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MAXIMUM WORKING PRESSURE RATING AND SERVICE FOR WHICH DESIGNED3000.0 POUNDS PER SQUARE INCH (PSI) WATER LBS
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE2.312 INCHES IN
NUT HEIGHT1.234 INCHES MINIMUM AND 1.266 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 2
801-6758238 PC8Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
2633-791-04Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 6758238?
6758238 is a NUT,UNION.
What parts can replace 6758238?
There are 2 known substitutes for 6758238: 801-6758238 PC8, 2633-791-04. Substitute compatibility should be verified for your specific system.
What is the NSN for 6758238?
6758238 is cataloged in the U.S. Government catalog under NSN 4730-01-434-6672. 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.