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Technical Data Sheet
PartsTable / COMPONENT / SMB208875-2
SMB208875-2 ✓ 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: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.094 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-551-7606, 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
SMB208875-2
NSN: 5310-00-551-7606
FSC: 5310
CAGE: 83355 — ATLAS SCREW AND SPECIALTY CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.094 INCHES NOMINAL IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
surface_treatmentNICKEL OVERALL
width_across_flats0.312 INCHES NOMINAL IN
nominal_thread_size0.164 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch32
NSN5310-00-551-7606
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SMB208875-2 · 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 DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.164 INCHES IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD QUANTITY PER INCH: 32
•
BEARING SURFACE TYPE: CHAMFERED
•
NUT HEIGHT: 0.094 INCHES NOMINAL IN
•
THREAD CLASS: 2B
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.164 INCHES IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH32
BEARING SURFACE TYPECHAMFERED
NUT HEIGHT0.094 INCHES NOMINAL IN
THREAD CLASS2B
NUT STYLEHEXAGON
SURFACE TREATMENTNICKEL OVERALL
WIDTH ACROSS FLATS0.312 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
TZA35128Interchangeable
interchangeable cross-reference
interchangeable
MIL-H-16384TYPE A/EInterchangeable
interchangeable cross-reference
interchangeable
5599Interchangeable
interchangeable cross-reference
interchangeable
1820640Interchangeable
interchangeable cross-reference
interchangeable
6739Interchangeable
interchangeable cross-reference
interchangeable
703584Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SMB208875-2?
SMB208875-2 is a NUT,PLAIN,HEXAGON.
What parts can replace SMB208875-2?
There are 15 known substitutes for SMB208875-2: TZA35128, MIL-H-16384TYPE A/E, 5599 and 12 more. Substitute compatibility should be verified for your specific system.
Is SMB208875-2 still available?
SMB208875-2 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