PartsTable
Technical Data Sheet
MS21303-1 ✓ 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 NUT,EYE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: EYE, nut_width: 1.625 INCHES NOMINAL IN, hole_width: 0.875 INCHES NOMINAL IN, hole_height: 1.500 INCHES NOMINAL IN, thread_class: 2B. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-274-9021, 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
MS21303-1
NSN: 5310-00-274-9021
FSC: 5310
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleEYE
nut_width1.625 INCHES NOMINAL IN
hole_width0.875 INCHES NOMINAL IN
hole_height1.500 INCHES NOMINAL IN
thread_class2B
body_diameter1.375 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
overall_height3.125 INCHES NOMINAL IN
special_featuresGROOVED FOR WIRE STRAND W/ONE GROOVE 0.875 IN. BY 1.500 IN. INSIDE DIMENSIONS IN
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL
NSN5310-00-274-9021
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MS21303-1 · 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
BODY DIAMETER: 1.375 INCHES NOMINAL IN
NUT WIDTH: 1.625 INCHES NOMINAL IN
FABRICATION METHOD: FORGED
NUT STYLE: EYE
NOMINAL THREAD SIZE: 0.625 INCHES IN
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH: 11
TECHNICAL CHARACTERISTICS (FLIS)
BODY DIAMETER1.375 INCHES NOMINAL IN
NUT WIDTH1.625 INCHES NOMINAL IN
FABRICATION METHODFORGED
NUT STYLEEYE
SPECIAL FEATURESGROOVED FOR WIRE STRAND W/ONE GROOVE 0.875 IN. BY 1.500 IN. INSIDE DIMENSIONS IN
NOMINAL THREAD SIZE0.625 INCHES IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH11
HOLE WIDTH0.875 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
7-510Interchangeable
interchangeable cross-reference
interchangeable
X3207AQFInterchangeable
interchangeable cross-reference
interchangeable
6210ZInterchangeable
interchangeable cross-reference
interchangeable
827797Interchangeable
interchangeable cross-reference
interchangeable
MILR11461Interchangeable
interchangeable cross-reference
interchangeable
2001E001P3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS21303-1?
MS21303-1 is a NUT,EYE.
What parts can replace MS21303-1?
There are 14 known substitutes for MS21303-1: 7-510, X3207AQF, 6210Z and 11 more. Substitute compatibility should be verified for your specific system.
Is MS21303-1 still available?
MS21303-1 is currently cancelled.
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