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290SIZE1 ✓ 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: 2.500 INCHES NOMINAL IN, hole_width: 1.500 INCHES NOMINAL IN, hole_height: 2.000 INCHES NOMINAL IN, thread_class: 3B. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-880-3999, 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
290SIZE1
NSN: 5310-00-880-3999
FSC: 5310
CAGE: 80996 — ITT GRINNELL CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleEYE
nut_width2.500 INCHES NOMINAL IN
hole_width1.500 INCHES NOMINAL IN
hole_height2.000 INCHES NOMINAL IN
thread_class3B
body_diameter1.375 INCHES NOMINAL IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
overall_height3.375 INCHES NOMINAL IN
special_featuresBODY DIA TAPERS TO 1.000 IN. DIA AT BOTTOM OF NUT IN
thread_directionRIGHT-HAND
eye_body_thickness0.500 INCHES NOMINAL IN
NSN5310-00-880-3999
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 290SIZE1 · 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 WIDTH: 1.500 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD QUANTITY PER INCH: 13
•
MATERIAL: STEEL OVERALL
•
BODY DIAMETER: 1.375 INCHES NOMINAL IN
•
NUT STYLE: EYE
TECHNICAL CHARACTERISTICS (FLIS)
HOLE WIDTH1.500 INCHES NOMINAL IN
SPECIAL FEATURESBODY DIA TAPERS TO 1.000 IN. DIA AT BOTTOM OF NUT IN
NOMINAL THREAD SIZE0.500 INCHES IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH13
MATERIALSTEEL OVERALL
BODY DIAMETER1.375 INCHES NOMINAL IN
NUT STYLEEYE
THREAD DIRECTIONRIGHT-HAND
NUT WIDTH2.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
A-A-1192Interchangeable
interchangeable cross-reference
interchangeable
MSS SP-58 TY11Interchangeable
interchangeable cross-reference
interchangeable
WW-H-171 NR11Interchangeable
interchangeable cross-reference
interchangeable
ANSI/MSS-SP-58Interchangeable
interchangeable cross-reference
interchangeable
WWH171Interchangeable
interchangeable cross-reference
interchangeable
104G-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 290SIZE1?
290SIZE1 is a NUT,EYE.
What parts can replace 290SIZE1?
There are 13 known substitutes for 290SIZE1: A-A-1192, MSS SP-58 TY11, WW-H-171 NR11 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 290SIZE1?
290SIZE1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-880-3999. 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