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PartsTable / COMPONENT / AC32A509-3
AC32A509-3 ✓ 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 material: STEEL COMP 1018 OR STEEL COMP 1020 OR STEEL COMP 1025 OVERALL, hole_diameter: 2.445 INCHES MINIMUM AND 2.455 INCHES MAXIMUM IN, outside_diameter: 3.032 INCHES MINIMUM AND 3.092 INCHES MAXIMUM IN, style_designator: KEY, surface_treatment: CADMIUM AND CHROMATE OVERALL, material_thickness: 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-877-9576, 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
AC32A509-3
NSN: 5310-00-877-9576
FSC: 5310
CAGE: 88049 — SAFETY FOR VISUAL EDUCATION (USA)
SPECIFICATIONS
materialSTEEL COMP 1018 OR STEEL COMP 1020 OR STEEL COMP 1025 OVERALL
hole_diameter2.445 INCHES MINIMUM AND 2.455 INCHES MAXIMUM IN
outside_diameter3.032 INCHES MINIMUM AND 3.092 INCHES MAXIMUM IN
style_designatorKEY
surface_treatmentCADMIUM AND CHROMATE OVERALL
material_thickness0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
internal_key_quantity1
internal_straight_key_width0.209 INCHES MINIMUM AND 0.229 INCHES MAXIMUM IN
material_document_and_classificationASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
distance_from_centerline_to_top_of_internal_key1.100 INCHES MINIMUM AND 1.110 INCHES MAXIMUM IN
NSN5310-00-877-9576
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AC32A509-3 · 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
•
HOLE DIAMETER: 2.445 INCHES MINIMUM AND 2.455 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1018 OR STEEL COMP 1020 OR STEEL COMP 1025 OVERALL
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
STYLE DESIGNATOR: KEY
•
INTERNAL STRAIGHT KEY WIDTH: 0.209 INCHES MINIMUM AND 0.229 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
•
MATERIAL THICKNESS: 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER2.445 INCHES MINIMUM AND 2.455 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1018 OR STEEL COMP 1020 OR STEEL COMP 1025 OVERALL
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
STYLE DESIGNATORKEY
INTERNAL STRAIGHT KEY WIDTH0.209 INCHES MINIMUM AND 0.229 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL
MATERIAL THICKNESS0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
INTERNAL KEY QUANTITY1
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY1.100 INCHES MINIMUM AND 1.110 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
A357Interchangeable
interchangeable cross-reference
interchangeable
10-1424PC26Interchangeable
interchangeable cross-reference
interchangeable
125-8Interchangeable
interchangeable cross-reference
interchangeable
AN7503-39Interchangeable
Same NIIN cross-reference
interchangeable
5310PL1023244Interchangeable
Same NIIN cross-reference
interchangeable
MS21258C39Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AC32A509-3?
AC32A509-3 is a WASHER,KEY.
What parts can replace AC32A509-3?
There are 7 known substitutes for AC32A509-3: A357, 10-1424PC26, 125-8 and 4 more. Substitute compatibility should be verified for your specific system.
Is AC32A509-3 still available?
AC32A509-3 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026