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50FMP10-440 — NUT,SELF-LOCKING,SPLINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

50FMP10-440: NUT,SELF-LOCKING,SPLINE.

The NUT,SELF-LOCKING,SPLINE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: SPLINE, nut_height: 0.179 INCHES NOMINAL IN, pilot_length: 0.054 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC). This part is cataloged in the U.S.

Government catalog under NSN 5310-00-061-8682, 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
50FMP10-440
NSN: 5310-00-061-8682
FSC: 5310 — Nuts and Washers
CAGE: 56878 — SPS TECHNOLOGIES, LLC DBA PB FASTENERS (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleSPLINE
nut_height0.179 INCHES NOMINAL IN
pilot_length0.054 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
pilot_diameter0.168 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
surface_treatmentPASSIVATE OVERALL
width_across_flats0.188 INCHES NOMINAL IN
nominal_thread_size0.112 INCHES IN
NSN5310-00-061-8682
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 50FMP10-440 · 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
•
WIDTH ACROSS FLATS: 0.188 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.112 INCHES IN
•
PILOT DIAMETER: 0.168 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
•
PILOT LENGTH: 0.054 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
NUT HEIGHT: 0.179 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS0.188 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.112 INCHES IN
PILOT DIAMETER0.168 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN
PILOT LENGTH0.054 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT0.179 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE OVERALL
NUT STYLESPLINE
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
5436K70P2Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 50FMP10-440?
50FMP10-440 is a NUT,SELF-LOCKING,SPLINE.
What parts can replace 50FMP10-440?
There is 1 known substitute for 50FMP10-440: 5436K70P2. Substitute compatibility should be verified for your specific system.
What is the NSN for 50FMP10-440?
50FMP10-440 is cataloged in the U.S. Government catalog under NSN 5310-00-061-8682. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.