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96278A527 — NUT,SELF-LOCKING,ASSEMBLED WASHE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

96278A527: NUT,SELF-LOCKING,ASSEMBLED WASHE.

NUT,SELF-LOCKING,ASSEMBLED WASHE. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: EXTERNAL TOOTHEXTERNAL TOOTH, thread_class: 2B2B, thread_series: UNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC), overall_height: 0.390625 INCHES NOMINAL0.390625 INCHES NOMINAL IN, locking_feature: PREVAILING TORQUE ALL METAL DESIGNPREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-706-0203, 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
96278A527
NSN: 5310-01-706-0203
FSC: 5310 — Nuts and Washers
CAGE: 3A054 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleEXTERNAL TOOTHEXTERNAL TOOTH
thread_class2B2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC)
overall_height0.390625 INCHES NOMINAL0.390625 INCHES NOMINAL IN
locking_featurePREVAILING TORQUE ALL METAL DESIGNPREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HANDRIGHT-HAND
width_across_flats0.5625 INCHES NOMINAL0.5625 INCHES NOMINAL IN
nominal_thread_size0.375 INCHES0.375 INCHES IN
end_item_identification01-580-705501-580-7055
washer_outside_diameter0.65625 INCHES NOMINAL0.65625 INCHES NOMINAL IN
thread_quantity_per_inch1616
NSN5310-01-706-0203
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 96278A527 · 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
•
WASHER OUTSIDE DIAMETER: 0.65625 INCHES NOMINAL0.65625 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.5625 INCHES NOMINAL0.5625 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HANDRIGHT-HAND
•
NOMINAL THREAD SIZE: 0.375 INCHES0.375 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGNPREVAILING TORQUE ALL METAL DESIGN
•
NUT STYLE: EXTERNAL TOOTHEXTERNAL TOOTH
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.390625 INCHES NOMINAL0.390625 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER0.65625 INCHES NOMINAL0.65625 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.5625 INCHES NOMINAL0.5625 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HANDRIGHT-HAND
NOMINAL THREAD SIZE0.375 INCHES0.375 INCHES IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGNPREVAILING TORQUE ALL METAL DESIGN
NUT STYLEEXTERNAL TOOTHEXTERNAL TOOTH
THREAD CLASS2B2B
END ITEM IDENTIFICATION01-580-705501-580-7055
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 96278A527?
96278A527 is a NUT,SELF-LOCKING,ASSEMBLED WASHE.
What is the NSN for 96278A527?
96278A527 is cataloged in the U.S. Government catalog under NSN 5310-01-706-0203. 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.