PartsTable
Technical Data Sheet
2051 0303 ✓ 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 thickness: 0.090 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN, hole_diameter: 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN, hardness_rating: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM, overall_diameter: 0.880 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN, surface_treatment: CADMIUM OR ZINC OVERALL, peripheral_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-282-3391, 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
2051 0303
NSN: 5310-01-282-3391
FSC: 5310
CAGE: 3T063 — MOTOR CITY FASTENERS INC (USA)
SPECIFICATIONS
thickness0.090 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
hole_diameter0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
hardness_rating38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
overall_diameter0.880 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN
surface_treatmentCADMIUM OR ZINC OVERALL
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-01-282-3391
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2051 0303 · 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
OVERALL DIAMETER: 0.880 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN
HOLE DIAMETER: 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
HARDNESS RATING: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
THICKNESS: 0.090 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
MATERIAL: STEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1552 OR STEEL COMP 1053 OR STEEL COMP 1054 OR STEEL COMP 1055 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1062 OR STEEL COMP 1064 OR STEEL COMP 1065 OVERALL
PERIPHERAL SHAPE STYLE: ROUND
CENTER HOLE SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER0.880 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN
HOLE DIAMETER0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
HARDNESS RATING38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
THICKNESS0.090 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
MATERIALSTEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1552 OR STEEL COMP 1053 OR STEEL COMP 1054 OR STEEL COMP 1055 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1062 OR STEEL COMP 1064 OR STEEL COMP 1065 OVERALL
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
15341-1Interchangeable
interchangeable cross-reference
interchangeable
153433Interchangeable
interchangeable cross-reference
interchangeable
153427Interchangeable
interchangeable cross-reference
interchangeable
152687Interchangeable
interchangeable cross-reference
interchangeable
V2329Interchangeable
interchangeable cross-reference
interchangeable
177M4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2051 0303?
2051 0303 is a WASHER,FLAT.
What parts can replace 2051 0303?
There are 7 known substitutes for 2051 0303: 15341-1, 153433, 153427 and 4 more. Substitute compatibility should be verified for your specific system.
Is 2051 0303 still available?
2051 0303 is currently cancelled.
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