PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 8331803
8331803 ✓ 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,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.381 INCHES MINIMUM AND 0.401 INCHES MAXIMUM IN, outside_diameter: 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN, style_designator: FLAT EXTERNAL TEETH, material_thickness: 0.035 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-281-3370, 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
8331803
NSN: 5310-00-281-3370
FSC: 5310
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.381 INCHES MINIMUM AND 0.401 INCHES MAXIMUM IN
outside_diameter0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
style_designatorFLAT EXTERNAL TEETH
material_thickness0.035 INCHES NOMINAL IN
NSN5310-00-281-3370
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 8331803 · 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
•
OUTSIDE DIAMETER: 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.035 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.381 INCHES MINIMUM AND 0.401 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: FLAT EXTERNAL TEETH
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN
MATERIAL THICKNESS0.035 INCHES NOMINAL IN
HOLE DIAMETER0.381 INCHES MINIMUM AND 0.401 INCHES MAXIMUM IN
STYLE DESIGNATORFLAT EXTERNAL TEETH
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
AN6-43Interchangeable
interchangeable cross-reference
interchangeable
AS20659Interchangeable
interchangeable cross-reference
interchangeable
4113Interchangeable
interchangeable cross-reference
interchangeable
PC46722-1Interchangeable
interchangeable cross-reference
interchangeable
281-4113Interchangeable
interchangeable cross-reference
interchangeable
ASTM-D4727Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 8331803?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 8331803?
8331803 is a WASHER,LOCK.
What parts can replace 8331803?
There are 9 known substitutes for 8331803: AN6-43, AS20659, 4113 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8331803?
8331803 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-281-3370. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 8331803

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026