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2789-1121 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

2789-1121: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, nut_style: HEXAGON, nut_height: 0.812 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-649-7010, 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
2789-1121
NSN: 5310-00-649-7010
FSC: 5310 — Nuts and Washers
CAGE: 49956 — RAYTHEON COMPANY DIV CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
nut_styleHEXAGON
nut_height0.812 INCHES NOMINAL IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.368 INCHES MINIMUM AND 0.382 INCHES MAXIMUM IN
nominal_thread_size0.250 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch20
material_document_and_classificationASTM A582,CONDITION A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-649-7010
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2789-1121 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
WIDTH ACROSS FLATS: 0.368 INCHES MINIMUM AND 0.382 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: 171,FIN. 5.4.1 MIL STD SINGLE TREATMENT RESPONSE OVERALL
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582,CONDITION A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NUT HEIGHT: 0.812 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.368 INCHES MINIMUM AND 0.382 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION171,FIN. 5.4.1 MIL STD SINGLE TREATMENT RESPONSE OVERALL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582,CONDITION A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NUT HEIGHT0.812 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
NUT STYLEHEXAGON
THREAD CLASS2B
SUBSTITUTES & CROSS-REFERENCES 1
9075942Same 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 2789-1121?
2789-1121 is a NUT,PLAIN,HEXAGON.
What parts can replace 2789-1121?
There is 1 known substitute for 2789-1121: 9075942. Substitute compatibility should be verified for your specific system.
What is the NSN for 2789-1121?
2789-1121 is cataloged in the U.S. Government catalog under NSN 5310-00-649-7010. 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.