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PartsTable / COMPONENT / 53A68A125
53A68A125 ✓ 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,RECESSED is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY A OVERALL, recess_angle: 90.0 DEGREES NOMINAL, hole_diameter: 0.500 INCHES NOMINAL IN, recess_diameter: 0.540 INCHES NOMINAL IN, outside_diameter: 0.683 INCHES MINIMUM AND 0.685 INCHES MAXIMUM IN, style_designator: RECESSED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-078-0032, 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
53A68A125
NSN: 5310-00-078-0032
FSC: 5310
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialNICKEL ALLOY A OVERALL
recess_angle90.0 DEGREES NOMINAL
hole_diameter0.500 INCHES NOMINAL IN
recess_diameter0.540 INCHES NOMINAL IN
outside_diameter0.683 INCHES MINIMUM AND 0.685 INCHES MAXIMUM IN
style_designatorRECESSED
material_thickness0.156 INCHES NOMINAL IN
material_document_and_classificationQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5310-00-078-0032
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 53A68A125 · 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
•
RECESS DIAMETER: 0.540 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 0.683 INCHES MINIMUM AND 0.685 INCHES MAXIMUM IN
•
RECESS ANGLE: 90.0 DEGREES NOMINAL
•
MATERIAL THICKNESS: 0.156 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.500 INCHES NOMINAL IN
•
MATERIAL: NICKEL ALLOY A OVERALL
•
STYLE DESIGNATOR: RECESSED
TECHNICAL CHARACTERISTICS (FLIS)
RECESS DIAMETER0.540 INCHES NOMINAL IN
OUTSIDE DIAMETER0.683 INCHES MINIMUM AND 0.685 INCHES MAXIMUM IN
RECESS ANGLE90.0 DEGREES NOMINAL
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
MATERIAL THICKNESS0.156 INCHES NOMINAL IN
HOLE DIAMETER0.500 INCHES NOMINAL IN
MATERIALNICKEL ALLOY A OVERALL
STYLE DESIGNATORRECESSED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
242027P3Interchangeable
interchangeable cross-reference
interchangeable
15647Interchangeable
interchangeable cross-reference
interchangeable
NE9444Interchangeable
interchangeable cross-reference
interchangeable
E121109Interchangeable
interchangeable cross-reference
interchangeable
BAC1503-1509Interchangeable
interchangeable cross-reference
interchangeable
1464708Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 53A68A125?
53A68A125 is a WASHER,RECESSED.
What parts can replace 53A68A125?
There are 21 known substitutes for 53A68A125: 242027P3, 15647, NE9444 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 53A68A125?
53A68A125 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-078-0032. 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