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Technical Data Sheet
PartsTable / COMPONENT / 26N251PC32
26N251PC32 ✓ 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,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1015 OVERALL, nut_style: ROUND, nut_diameter: 4.1563 INCHES NOMINAL IN, nut_thickness: 0.5938 INCHES NOMINAL IN, thread_series: UNS, hardness_rating: 66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-185-6357, 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
26N251PC32
NSN: 5310-00-185-6357
FSC: 5310
CAGE: 7PZX0 — FAIRBANKS MORSE, LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 1015 OVERALL
nut_styleROUND
nut_diameter4.1563 INCHES NOMINAL IN
nut_thickness0.5938 INCHES NOMINAL IN
thread_seriesUNS
hardness_rating66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
thread_directionRIGHT-HAND
drive_point_depth0.125 INCHES NOMINAL IN
drive_point_width0.375 INCHES NOMINAL IN
nominal_thread_size3.137 INCHES IN
drive_point_quantity4
thread_pitch_diameters+3.0829 TO 3.0888 INCHES IN
NSN5310-00-185-6357
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 26N251PC32 · 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 PITCH DIAMETERS: +3.0829 TO 3.0888 INCHES IN
•
DRIVE POINT WIDTH: 0.375 INCHES NOMINAL IN
•
THREAD SERIES: UNS
•
THREAD QUANTITY PER INCH: 12
•
HARDNESS RATING: 66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
•
NOMINAL THREAD SIZE: 3.137 INCHES IN
•
NUT DIAMETER: 4.1563 INCHES NOMINAL IN
•
DRIVE POINT DEPTH: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD PITCH DIAMETERS+3.0829 TO 3.0888 INCHES IN
DRIVE POINT WIDTH0.375 INCHES NOMINAL IN
THREAD SERIESUNS
THREAD QUANTITY PER INCH12
HARDNESS RATING66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
NOMINAL THREAD SIZE3.137 INCHES IN
NUT DIAMETER4.1563 INCHES NOMINAL IN
DRIVE POINT DEPTH0.125 INCHES NOMINAL IN
MATERIALSTEEL COMP 1015 OVERALL
DRIVE POINT QUANTITY4
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
5829Interchangeable
interchangeable cross-reference
interchangeable
X9-100-4Interchangeable
interchangeable cross-reference
interchangeable
A261Interchangeable
interchangeable cross-reference
interchangeable
MIL-E-1/140Interchangeable
interchangeable cross-reference
interchangeable
5800052-0100-012Interchangeable
interchangeable cross-reference
interchangeable
5840Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 26N251PC32?
26N251PC32 is a NUT,PLAIN,ROUND.
What parts can replace 26N251PC32?
There are 25 known substitutes for 26N251PC32: 5829, X9-100-4, A261 and 22 more. Substitute compatibility should be verified for your specific system.
Is 26N251PC32 still available?
26N251PC32 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026