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Technical Data Sheet
PartsTable / COMPONENT / D4577PC9
D4577PC9 ✓ Verified by PartsTable
— · 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 thickness: 0.028 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN, hole_diameter: 0.312 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN, overall_diameter: 0.617 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND, cross-sectional_shape_style: RECTANGULAR. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-527-7033, 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
D4577PC9
NSN: 5310-00-527-7033
FSC: 5310
CAGE: 28968 — CIRCOR INSTRUMENTATION TECHNOLOGIES, INC. DBA HOKE GYROLOK (USA)
SPECIFICATIONS
thickness0.028 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN
hole_diameter0.312 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
overall_diameter0.617 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-527-7033
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: D4577PC9 · 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
•
OVERALL DIAMETER: 0.617 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN
•
HOLE DIAMETER: 0.312 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
THICKNESS: 0.028 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER0.617 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN
HOLE DIAMETER0.312 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.028 INCHES MINIMUM AND 0.034 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
PERIPHERAL SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
394-6709-1193487PC25Interchangeable
interchangeable cross-reference
interchangeable
282-6702-771585REVBPC25Interchangeable
interchangeable cross-reference
interchangeable
3768-86REVAPC25Interchangeable
interchangeable cross-reference
interchangeable
S5Interchangeable
interchangeable cross-reference
interchangeable
177039-75Interchangeable
interchangeable cross-reference
interchangeable
12Z336-6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D4577PC9?
D4577PC9 is a WASHER,FLAT.
What parts can replace D4577PC9?
There are 17 known substitutes for D4577PC9: 394-6709-1193487PC25, 282-6702-771585REVBPC25, 3768-86REVAPC25 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for D4577PC9?
D4577PC9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-527-7033. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026