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WSTA1 ✓ 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 1010 OVERALL, thickness: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN, hole_diameter: 1.781 INCHES MINIMUM AND 1.811 INCHES MAXIMUM IN, overall_diameter: 3.485 INCHES MINIMUM AND 3.515 INCHES MAXIMUM IN, features_provided: CASEHARDENED, 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 5310-00-262-3045, 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
WSTA1
NSN: 5310-00-262-3045
FSC: 5310
CAGE: 0MKW7 — MINNPAR, LLC DBA MINNPAR (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
thickness0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
hole_diameter1.781 INCHES MINIMUM AND 1.811 INCHES MAXIMUM IN
overall_diameter3.485 INCHES MINIMUM AND 3.515 INCHES MAXIMUM IN
features_providedCASEHARDENED
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-262-3045
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: WSTA1 · 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: 1.781 INCHES MINIMUM AND 1.811 INCHES MAXIMUM IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
OVERALL DIAMETER: 3.485 INCHES MINIMUM AND 3.515 INCHES MAXIMUM IN
•
THICKNESS: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MATERIAL: STEEL COMP 1010 OVERALL
•
FEATURES PROVIDED: CASEHARDENED
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER1.781 INCHES MINIMUM AND 1.811 INCHES MAXIMUM IN
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER3.485 INCHES MINIMUM AND 3.515 INCHES MAXIMUM IN
THICKNESS0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIALSTEEL COMP 1010 OVERALL
FEATURES PROVIDEDCASEHARDENED
CENTER HOLE SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
C8352Interchangeable
interchangeable cross-reference
interchangeable
44827Interchangeable
interchangeable cross-reference
interchangeable
444742Interchangeable
interchangeable cross-reference
interchangeable
32472Interchangeable
interchangeable cross-reference
interchangeable
SMPH-6Interchangeable
interchangeable cross-reference
interchangeable
864P5XInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is WSTA1?
WSTA1 is a WASHER,FLAT.
What parts can replace WSTA1?
There are 15 known substitutes for WSTA1: C8352, 44827, 444742 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for WSTA1?
WSTA1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-262-3045. 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