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P4078977 — NUT,PLAIN,SQUARE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

P4078977: NUT,PLAIN,SQUARE.

The NUT,PLAIN,SQUARE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: SQUARE, nut_height: 0.880 INCHES NOMINAL IN, thread_class: 2B, thread_direction: RIGHT-HAND, surface_treatment: NICKEL OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-470-7456, 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
P4078977
NSN: 5310-01-470-7456
FSC: 5310 — Nuts and Washers
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSQUARE
nut_height0.880 INCHES NOMINAL IN
thread_class2B
thread_directionRIGHT-HAND
surface_treatmentNICKEL OVERALL
width_across_flats1.500 INCHES NOMINAL IN
bearing_surface_typeFLAT
hole_type_and_quantity1 TAPPED
end_item_identification6636013784011
hole_configuration_styleCONFIGURATION D
thread_quantity_per_inch12
NSN5310-01-470-7456
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: P4078977 · 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: 1.500 INCHES NOMINAL IN
•
HOLE CONFIGURATION STYLE: CONFIGURATION D
•
THREAD DIRECTION: RIGHT-HAND
•
NUT HEIGHT: 0.880 INCHES NOMINAL IN
•
SURFACE TREATMENT: NICKEL OVERALL
•
NUT STYLE: SQUARE
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.500 INCHES NOMINAL IN
HOLE CONFIGURATION STYLECONFIGURATION D
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.880 INCHES NOMINAL IN
SURFACE TREATMENTNICKEL OVERALL
NUT STYLESQUARE
THREAD CLASS2B
END ITEM IDENTIFICATION6636013784011
HOLE NOMINAL THREAD DIAMETER0.880 INCHES IN
THREAD QUANTITY PER INCH12
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 P4078977?
P4078977 is a NUT,PLAIN,SQUARE.
What is the NSN for P4078977?
P4078977 is cataloged in the U.S. Government catalog under NSN 5310-01-470-7456. 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.