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Technical Data Sheet
SMB619161 ✓ 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,SELF-LOCKING,KNURLED is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, nut_style: KNURLED, knurl_width: 0.125 INCHES NOMINAL IN, nut_diameter: 0.500 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, thread_class: 3B, nut_thickness: 0.323 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-444-7950, 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
SMB619161
NSN: 5310-00-444-7950
FSC: 5310
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleKNURLED
knurl_width0.125 INCHES NOMINAL IN
nut_diameter0.500 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
thread_class3B
nut_thickness0.323 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
thread_seriesUNF
locking_featureFREE-RUNNING ALL METAL DESIGN
thread_directionRIGHT-HAND
surface_treatmentNICKEL OVERALL
nominal_thread_size0.190 INCHES IN
thread_quantity_per_inch32
NSN5310-00-444-7950
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SMB619161 · 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
THREAD DIRECTION: RIGHT-HAND
MATERIAL: COPPER ALLOY OVERALL
NUT THICKNESS: 0.323 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
NOMINAL THREAD SIZE: 0.190 INCHES IN
NUT STYLE: KNURLED
THREAD QUANTITY PER INCH: 32
KNURL WIDTH: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTNICKEL OVERALL
THREAD DIRECTIONRIGHT-HAND
MATERIALCOPPER ALLOY OVERALL
NUT THICKNESS0.323 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
NOMINAL THREAD SIZE0.190 INCHES IN
NUT STYLEKNURLED
THREAD QUANTITY PER INCH32
KNURL WIDTH0.125 INCHES NOMINAL IN
THREAD SERIESUNF
NUT DIAMETER0.500 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
4537Interchangeable
interchangeable cross-reference
interchangeable
SDR14Interchangeable
interchangeable cross-reference
interchangeable
6-657Interchangeable
interchangeable cross-reference
interchangeable
75A10B8Interchangeable
interchangeable cross-reference
interchangeable
516730Interchangeable
interchangeable cross-reference
interchangeable
126918Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SMB619161?
SMB619161 is a NUT,SELF-LOCKING,KNURLED.
What parts can replace SMB619161?
There are 16 known substitutes for SMB619161: 4537, SDR14, 6-657 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SMB619161?
SMB619161 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-444-7950. This indicates validated use in U.S. government and defense supply chains.
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