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PartsTable / COMPONENT / 50993R11
50993R11 ✓ 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,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.500 INCHES NOMINAL IN, thread_class: 3B, thread_series: UN, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-350-5746, 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
50993R11
NSN: 5310-00-350-5746
FSC: 5310
CAGE: 31007 — NAVISTAR INTERNATIONAL CORPORATION DBA NAVISTAR (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.500 INCHES NOMINAL IN
thread_class3B
thread_seriesUN
thread_directionRIGHT-HAND
width_across_flats4.000 INCHES NOMINAL IN
nominal_thread_size3.250 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch12
NSN5310-00-350-5746
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 50993R11 · 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
•
THREAD CLASS: 3B
•
WIDTH ACROSS FLATS: 4.000 INCHES NOMINAL IN
•
THREAD SERIES: UN
•
NOMINAL THREAD SIZE: 3.250 INCHES IN
•
THREAD QUANTITY PER INCH: 12
•
BEARING SURFACE TYPE: CHAMFERED
•
THREAD DIRECTION: RIGHT-HAND
•
NUT HEIGHT: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
WIDTH ACROSS FLATS4.000 INCHES NOMINAL IN
THREAD SERIESUN
NOMINAL THREAD SIZE3.250 INCHES IN
THREAD QUANTITY PER INCH12
BEARING SURFACE TYPECHAMFERED
THREAD DIRECTIONRIGHT-HAND
NUT HEIGHT0.500 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
NUT STYLEHEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
R3X1228Interchangeable
interchangeable cross-reference
interchangeable
R3X1473Interchangeable
interchangeable cross-reference
interchangeable
700013Interchangeable
interchangeable cross-reference
interchangeable
26335Interchangeable
interchangeable cross-reference
interchangeable
39127Interchangeable
interchangeable cross-reference
interchangeable
210-19082-42Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 50993R11?
50993R11 is a NUT,PLAIN,HEXAGON.
What parts can replace 50993R11?
There are 17 known substitutes for 50993R11: R3X1228, R3X1473, 700013 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 50993R11?
50993R11 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-350-5746. 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