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PartsTable / COMPONENT / 50FP3-632
50FP3-632 ✓ 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,CLINCH is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: CLINCH, nut_height: 0.260 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN, pilot_length: 0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNJC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-083-1818, 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
50FP3-632
NSN: 5310-00-083-1818
FSC: 5310
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleCLINCH
nut_height0.260 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
pilot_length0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNJC
pilot_diameter0.220 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.305 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
nominal_thread_size0.138 INCHES IN
NSN5310-00-083-1818
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 50FP3-632 · 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
•
PILOT DIAMETER: 0.220 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
•
THREAD CLASS: 3B
•
THREAD SERIES: UNJC
•
WIDTH ACROSS FLATS: 0.305 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
NOMINAL THREAD SIZE: 0.138 INCHES IN
•
NUT COUNTERBORE DEPTH: 0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM NUT IN
•
COUNTERBORE DIAMETER: 0.165 INCHES MINIMUM AND 0.170 INCHES MAXIMUM NUT IN
TECHNICAL CHARACTERISTICS (FLIS)
PILOT DIAMETER0.220 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
THREAD CLASS3B
THREAD SERIESUNJC
WIDTH ACROSS FLATS0.305 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
NOMINAL THREAD SIZE0.138 INCHES IN
NUT COUNTERBORE DEPTH0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM NUT IN
COUNTERBORE DIAMETER0.165 INCHES MINIMUM AND 0.170 INCHES MAXIMUM NUT IN
NUT STYLECLINCH
THREAD QUANTITY PER INCH32
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
81W376-103Interchangeable
interchangeable cross-reference
interchangeable
8P171FInterchangeable
interchangeable cross-reference
interchangeable
81-0113-203Interchangeable
interchangeable cross-reference
interchangeable
GGG-S-326 TY14CLAInterchangeable
interchangeable cross-reference
interchangeable
GGG-S-326Interchangeable
interchangeable cross-reference
interchangeable
5120-00-892-5319Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 50FP3-632?
50FP3-632 is a NUT,SELF-LOCKING,CLINCH.
What parts can replace 50FP3-632?
There are 8 known substitutes for 50FP3-632: 81W376-103, 8P171F, 81-0113-203 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 50FP3-632?
50FP3-632 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-083-1818. 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