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PartsTable / COMPONENT / 5310AC1-019
5310AC1-019 ✓ 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 material: STEEL COMP 4340 OVERALL, thickness: 0.078 INCHES NOMINAL IN, hole_diameter: 0.628 INCHES MINIMUM AND 0.633 INCHES MAXIMUM IN, overall_diameter: 1.052 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN, surface_treatment: CADMIUM OVERALL, peripheral_shape_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-491-0839, 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
5310AC1-019
NSN: 5310-00-491-0839
FSC: 5310
CAGE: 81996 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialSTEEL COMP 4340 OVERALL
thickness0.078 INCHES NOMINAL IN
hole_diameter0.628 INCHES MINIMUM AND 0.633 INCHES MAXIMUM IN
overall_diameter1.052 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN
surface_treatmentCADMIUM OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
minimum_tensile_strength160000 POUNDS PER SQUARE INCH LBS
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-491-0839
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5310AC1-019 · 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
•
MATERIAL: STEEL COMP 4340 OVERALL
•
SURFACE TREATMENT: CADMIUM OVERALL
•
THICKNESS: 0.078 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
HOLE DIAMETER: 0.628 INCHES MINIMUM AND 0.633 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MINIMUM TENSILE STRENGTH: 160000 POUNDS PER SQUARE INCH LBS
•
PERIPHERAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 4340 OVERALL
SURFACE TREATMENTCADMIUM OVERALL
THICKNESS0.078 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HOLE DIAMETER0.628 INCHES MINIMUM AND 0.633 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MINIMUM TENSILE STRENGTH160000 POUNDS PER SQUARE INCH LBS
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER1.052 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN
CENTER HOLE SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
A65SCInterchangeable
interchangeable cross-reference
interchangeable
AX65Interchangeable
interchangeable cross-reference
interchangeable
5530Interchangeable
interchangeable cross-reference
interchangeable
0502 0106 00Interchangeable
interchangeable cross-reference
interchangeable
0MD13-876BInterchangeable
interchangeable cross-reference
interchangeable
D21Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5310AC1-019?
5310AC1-019 is a WASHER,FLAT.
What parts can replace 5310AC1-019?
There are 17 known substitutes for 5310AC1-019: A65SC, AX65, 5530 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 5310AC1-019?
5310AC1-019 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-491-0839. 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