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H50185-3 — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

H50185-3: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: DOUBLE HEXAGON, thread_class: 3B, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), overall_height: 0.395 INCHES NOMINAL IN, locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-157-5485, 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
H50185-3
NSN: 5310-01-157-5485
NIINs: 011575485, 011768410
FSC: 5310 — Nuts and Washers
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleDOUBLE HEXAGON
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
overall_height0.395 INCHES NOMINAL IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
special_featuresFORM/FIT/FUNCTION
thread_directionRIGHT-HAND
washer_thickness0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
width_across_flats0.250 INCHES NOMINAL IN
nominal_thread_size0.190 INCHES IN
washer_outside_diameter0.300 INCHES NOMINAL IN
NSN5310-01-157-5485
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: H50185-3 · 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 SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
TECHNICAL CHARACTERISTICS
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
SUBSTITUTES & CROSS-REFERENCES 4
J980P03BSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
J980P03DReference document
Same NSN cross-reference
Reference document — Replaced / superseded reference
10109857Reference document
Same NSN cross-reference
Reference document — Informative reference only
VN-1499-W-02Reference document
Same NSN cross-reference
Reference document — Replaced / superseded reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is H50185-3?
H50185-3 is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace H50185-3?
There are 4 known substitutes for H50185-3: J980P03B, J980P03D, 10109857 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H50185-3?
H50185-3 is cataloged in the U.S. Government catalog under NSN 5310-01-157-5485. 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.