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Technical Data Sheet
PartsTable / COMPONENT / 288D1
288D1 ✓ 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,SLOTTED,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: SLOTTED, HEXAGON, nut_height: 0.625 INCHES NOMINAL IN, thread_class: 2B, thread_series: UN, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-262-8283, 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
288D1
NSN: 5310-00-262-8283
FSC: 5310
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSLOTTED, HEXAGON
nut_height0.625 INCHES NOMINAL IN
thread_class2B
thread_seriesUN
thread_directionRIGHT-HAND
width_across_flats1.062 INCHES NOMINAL IN
nominal_thread_size0.625 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch16
NSN5310-00-262-8283
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 288D1 · 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: 2B
•
NOMINAL THREAD SIZE: 0.625 INCHES IN
•
THREAD SERIES: UN
•
THREAD QUANTITY PER INCH: 16
•
BEARING SURFACE TYPE: WASHER FACED
•
MATERIAL: STEEL OVERALL
•
NUT HEIGHT: 0.625 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2B
NOMINAL THREAD SIZE0.625 INCHES IN
THREAD SERIESUN
THREAD QUANTITY PER INCH16
BEARING SURFACE TYPEWASHER FACED
MATERIALSTEEL OVERALL
NUT HEIGHT0.625 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
NUT STYLESLOTTED, HEXAGON
WIDTH ACROSS FLATS1.062 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
278-1784-00Interchangeable
interchangeable cross-reference
interchangeable
278-1784-000Interchangeable
interchangeable cross-reference
interchangeable
18346Interchangeable
interchangeable cross-reference
interchangeable
291672Interchangeable
interchangeable cross-reference
interchangeable
292425Interchangeable
interchangeable cross-reference
interchangeable
123SCSA606-7Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 288D1?
288D1 is a NUT,PLAIN,SLOTTED,HEXAGON.
What parts can replace 288D1?
There are 15 known substitutes for 288D1: 278-1784-00, 278-1784-000, 18346 and 12 more. Substitute compatibility should be verified for your specific system.
Is 288D1 still available?
288D1 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