PartsTable
Technical Data Sheet
2187417 ✓ 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

NUT,SELF-LOCKING,SLOTTED,HEXAGON. Key specifications include material: STEEL OVERALL, nut_style: SLOTTED, HEXAGON, nut_height: 0.391 INCHES MINIMUM AND 0.421 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), 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 5310-01-281-6715, 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
2187417
NSN: 5310-01-281-6715
FSC: 5310
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSLOTTED, HEXAGON
nut_height0.391 INCHES MINIMUM AND 0.421 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
thread_directionRIGHT-HAND
width_across_flats0.570 INCHES NOMINAL IN
nominal_thread_size0.375 INCHES IN
thread_quantity_per_inch24
material_document_and_classificationAMS-5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-281-6715
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2187417 · 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
WIDTH ACROSS FLATS: 0.570 INCHES NOMINAL IN
NOMINAL THREAD SIZE: 0.375 INCHES IN
MATERIAL: STEEL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION: AMS-5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NUT STYLE: SLOTTED, HEXAGON
NUT HEIGHT: 0.391 INCHES MINIMUM AND 0.421 INCHES MAXIMUM IN
THREAD CLASS: 3B
THREAD QUANTITY PER INCH: 24
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS0.570 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.375 INCHES IN
MATERIALSTEEL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS-5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NUT STYLESLOTTED, HEXAGON
NUT HEIGHT0.391 INCHES MINIMUM AND 0.421 INCHES MAXIMUM IN
THREAD CLASS3B
THREAD QUANTITY PER INCH24
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
4010085Interchangeable
interchangeable cross-reference
interchangeable
4020520Interchangeable
interchangeable cross-reference
interchangeable
E10787-6Interchangeable
interchangeable cross-reference
interchangeable
4010085001Interchangeable
interchangeable cross-reference
interchangeable
E4033Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2187417?
2187417 is a NUT,SELF-LOCKING,SLOTTED,HEXAGON.
What parts can replace 2187417?
There are 5 known substitutes for 2187417: 4010085, 4020520, E10787-6 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2187417?
2187417 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-281-6715. This indicates validated use in U.S. government and defense supply chains.
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