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PartsTable / COMPONENT / 4001255-1
4001255-1 ✓ 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,PLAIN,CASTELLATED,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1120 OVERALL, nut_style: CASTELLATED, HEXAGON, nut_height: 0.609 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-268-7064, 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
4001255-1
NSN: 5310-00-268-7064
FSC: 5310
CAGE: 6N299 — AGCO CORP PARTS OPN (USA)
SPECIFICATIONS
materialSTEEL COMP 1120 OVERALL
nut_styleCASTELLATED, HEXAGON
nut_height0.609 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats0.625 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch20
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-268-7064
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 4001255-1 · 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
•
THREAD CLASS: 3B
•
NUT STYLE: CASTELLATED, HEXAGON
•
THREAD SERIES: UNF
•
BEARING SURFACE TYPE: WASHER FACED
•
NUT HEIGHT: 0.609 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 0.625 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
NUT STYLECASTELLATED, HEXAGON
THREAD SERIESUNF
BEARING SURFACE TYPEWASHER FACED
NUT HEIGHT0.609 INCHES NOMINAL IN
WIDTH ACROSS FLATS0.625 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 1120 OVERALL
NOMINAL THREAD SIZE0.438 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
SM-C-800985-1Interchangeable
interchangeable cross-reference
interchangeable
4001255Interchangeable
interchangeable cross-reference
interchangeable
400216Interchangeable
interchangeable cross-reference
interchangeable
SH-720Interchangeable
interchangeable cross-reference
interchangeable
H-3231Interchangeable
interchangeable cross-reference
interchangeable
CB344032Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4001255-1?
4001255-1 is a NUT,PLAIN,CASTELLATED,HEXAGON.
What parts can replace 4001255-1?
There are 6 known substitutes for 4001255-1: SM-C-800985-1, 4001255, 400216 and 3 more. Substitute compatibility should be verified for your specific system.
Is 4001255-1 still available?
4001255-1 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