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PartsTable / COMPONENT / 999F0762 PC 55
999F0762 PC 55 ✓ 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,KEY is a the manufacturer industrial component. Key specifications include hole_diameter: 50.0 MILLIMETERS NOMINAL MM, outside_diameter: 61.0 MILLIMETERS NOMINAL MM, style_designator: KEY, material_thickness: 1.25 MILLIMETERS NOMINAL MM, external_key_quantity: 17, internal_prebent_key_width: 6.0 MILLIMETERS NOMINAL MM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-129-0603, 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
999F0762 PC 55
NSN: 5310-01-129-0603
FSC: 5310
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
hole_diameter50.0 MILLIMETERS NOMINAL MM
outside_diameter61.0 MILLIMETERS NOMINAL MM
style_designatorKEY
material_thickness1.25 MILLIMETERS NOMINAL MM
external_key_quantity17
internal_prebent_key_width6.0 MILLIMETERS NOMINAL MM
overall_distance_including_keys74.0 MILLIMETERS NOMINAL MM
NSN5310-01-129-0603
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 999F0762 PC 55 · 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
•
EXTERNAL KEY QUANTITY: 17
•
MATERIAL THICKNESS: 1.25 MILLIMETERS NOMINAL MM
•
OUTSIDE DIAMETER: 61.0 MILLIMETERS NOMINAL MM
•
OVERALL DISTANCE INCLUDING KEYS: 74.0 MILLIMETERS NOMINAL MM
•
INTERNAL PREBENT KEY WIDTH: 6.0 MILLIMETERS NOMINAL MM
•
STYLE DESIGNATOR: KEY
•
HOLE DIAMETER: 50.0 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS (FLIS)
EXTERNAL KEY QUANTITY17
MATERIAL THICKNESS1.25 MILLIMETERS NOMINAL MM
OUTSIDE DIAMETER61.0 MILLIMETERS NOMINAL MM
OVERALL DISTANCE INCLUDING KEYS74.0 MILLIMETERS NOMINAL MM
INTERNAL PREBENT KEY WIDTH6.0 MILLIMETERS NOMINAL MM
STYLE DESIGNATORKEY
HOLE DIAMETER50.0 MILLIMETERS NOMINAL MM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
C8003Interchangeable
interchangeable cross-reference
interchangeable
C164Interchangeable
interchangeable cross-reference
interchangeable
8-04334-5Interchangeable
interchangeable cross-reference
interchangeable
MB 10Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 999F0762 PC 55?
999F0762 PC 55 is a WASHER,KEY.
What parts can replace 999F0762 PC 55?
There are 4 known substitutes for 999F0762 PC 55: C8003, C164, 8-04334-5 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 999F0762 PC 55?
999F0762 PC 55 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-129-0603. 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