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9F2978 — NUT,PLAIN,WELDING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

9F2978: NUT,PLAIN,WELDING.

The NUT,PLAIN,WELDING is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: PLAIN WELDING, thread_class: 2B, nut_thickness: 0.312 INCHES NOMINAL IN, thread_series: UNIFIED NATIONAL COARSE (UNC), thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-005-0781, 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
9F2978
NSN: 5310-00-005-0781
FSC: 5310 — Nuts and Washers
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_stylePLAIN WELDING
thread_class2B
nut_thickness0.312 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
nominal_thread_size0.375 INCHES IN
width_across_corners0.625 INCHES NOMINAL IN
end_item_identificationLOGISTICS SUPPORT VESSEL (LSV)
thread_quantity_per_inch16
NSN5310-00-005-0781
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 9F2978 · 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
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
NUT THICKNESS: 0.312 INCHES NOMINAL IN
•
NUT STYLE: PLAIN WELDING
•
THREAD CLASS: 2B
•
THREAD QUANTITY PER INCH: 16
TECHNICAL CHARACTERISTICS
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES IN
NUT THICKNESS0.312 INCHES NOMINAL IN
NUT STYLEPLAIN WELDING
THREAD CLASS2B
END ITEM IDENTIFICATIONLOGISTICS SUPPORT VESSEL (LSV)
THREAD QUANTITY PER INCH16
MATERIALSTEEL OVERALL
WIDTH ACROSS CORNERS0.625 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 9F2978?
9F2978 is a NUT,PLAIN,WELDING.
What is the NSN for 9F2978?
9F2978 is cataloged in the U.S. Government catalog under NSN 5310-00-005-0781. 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.