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PB195 ✓ 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,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.250 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, locking_feature: FREE-RUNNING ALL METAL DESIGN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-619-4969, 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
PB195
NSN: 5310-00-619-4969
FSC: 5310
CAGE: 66289 — WISCONSIN MOTORS, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.250 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
locking_featureFREE-RUNNING ALL METAL DESIGN
thread_directionRIGHT-HAND
width_across_flats0.688 INCHES NOMINAL IN
nominal_thread_size0.438 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch20
NSN5310-00-619-4969
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: PB195 · 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
•
MATERIAL: STEEL OVERALL
•
THREAD QUANTITY PER INCH: 20
•
BEARING SURFACE TYPE: CHAMFERED
•
NUT HEIGHT: 0.250 INCHES NOMINAL IN
•
THREAD SERIES: UNF
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
•
LOCKING FEATURE: FREE-RUNNING ALL METAL DESIGN
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
THREAD QUANTITY PER INCH20
BEARING SURFACE TYPECHAMFERED
NUT HEIGHT0.250 INCHES NOMINAL IN
THREAD SERIESUNF
NOMINAL THREAD SIZE0.438 INCHES IN
LOCKING FEATUREFREE-RUNNING ALL METAL DESIGN
THREAD CLASS2B
WIDTH ACROSS FLATS0.688 INCHES NOMINAL IN
NUT STYLEHEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
BA10133-7Interchangeable
interchangeable cross-reference
interchangeable
105-521Interchangeable
interchangeable cross-reference
interchangeable
SMB425581Interchangeable
interchangeable cross-reference
interchangeable
PT521Interchangeable
interchangeable cross-reference
interchangeable
CA634Interchangeable
interchangeable cross-reference
interchangeable
06643ABInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is PB195?
PB195 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace PB195?
There are 9 known substitutes for PB195: BA10133-7, 105-521, SMB425581 and 6 more. Substitute compatibility should be verified for your specific system.
Is PB195 still available?
PB195 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