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PartsTable / COMPONENT / 2X3687
2X3687 ✓ 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: COPPER ALLOY OVERALL, nut_style: HEXAGON, nut_height: 0.088 INCHES MINIMUM AND 0.093 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNEF, 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 5310-00-655-6819, 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
2X3687
NSN: 5310-00-655-6819
FSC: 5310
CAGE: 73743 — FISCHER SPECIAL MFG CO (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleHEXAGON
nut_height0.088 INCHES MINIMUM AND 0.093 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNEF
thread_directionRIGHT-HAND
countersink_angle90.0 DEGREES NOMINAL NUT
surface_treatmentNICKEL OVERALL
width_across_flats0.562 INCHES NOMINAL IN
nominal_thread_size0.500 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch28
NSN5310-00-655-6819
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 2X3687 · 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
•
SURFACE TREATMENT: NICKEL OVERALL
•
COUNTERSINK ANGLE: 90.0 DEGREES NOMINAL NUT
•
MATERIAL: COPPER ALLOY OVERALL
•
THREAD SERIES: UNEF
•
NUT STYLE: HEXAGON
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
WIDTH ACROSS FLATS: 0.562 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTNICKEL OVERALL
COUNTERSINK ANGLE90.0 DEGREES NOMINAL NUT
MATERIALCOPPER ALLOY OVERALL
THREAD SERIESUNEF
NUT STYLEHEXAGON
NOMINAL THREAD SIZE0.500 INCHES IN
THREAD DIRECTIONRIGHT-HAND
WIDTH ACROSS FLATS0.562 INCHES NOMINAL IN
THREAD CLASS2B
THREAD QUANTITY PER INCH28
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
6515NCM050290Interchangeable
interchangeable cross-reference
interchangeable
507034Interchangeable
interchangeable cross-reference
interchangeable
1692Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2X3687?
2X3687 is a NUT,PLAIN,HEXAGON.
What parts can replace 2X3687?
There are 3 known substitutes for 2X3687: 6515NCM050290, 507034, 1692. Substitute compatibility should be verified for your specific system.
What is the NSN for 2X3687?
2X3687 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-655-6819. 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