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326057PC2 — Technical Data Sheet

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— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: PLASTIC OVERALL, thickness: 0.062 INCHES NOMINAL IN, hole_diameter: 0.141 INCHES NOMINAL IN, overall_diameter: 0.312 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System under NSN 5310-00-599-1179, 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
326057PC2
NSN: 5310-00-599-1179
FSC: 5310
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialPLASTIC OVERALL
thickness0.062 INCHES NOMINAL IN
hole_diameter0.141 INCHES NOMINAL IN
overall_diameter0.312 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-599-1179
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 326057PC2 · 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
•
CENTER HOLE SHAPE STYLE: ROUND
•
MATERIAL: PLASTIC OVERALL
•
PERIPHERAL SHAPE STYLE: ROUND
•
THICKNESS: 0.062 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
OVERALL DIAMETER: 0.312 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.141 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CENTER HOLE SHAPE STYLEROUND
MATERIALPLASTIC OVERALL
PERIPHERAL SHAPE STYLEROUND
THICKNESS0.062 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OVERALL DIAMETER0.312 INCHES NOMINAL IN
HOLE DIAMETER0.141 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
387AInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
45H403InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
659714R91InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
347882InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
235891InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
347883InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 326057PC2?
326057PC2 is a WASHER,FLAT.
What parts can replace 326057PC2?
There are 6 known substitutes for 326057PC2: 387A, 45H403, 659714R91 and 3 more. Substitute compatibility should be verified for your specific system.
Is 326057PC2 still available?
326057PC2 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: October 2026