PartsTable
Technical Data Sheet

66419-A — Technical Data Sheet

✓ 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: PLASTIC POLYAMIDE NYLON LOCKING INSERT, nut_style: HEXAGON, nut_height: 0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN, temp_rating: 250.0 FAHRENHEIT MAXIMUM DEGF, thread_class: 3B, thread_series: UNJC. This part is cataloged in the Federal Logistics Information System under NSN 5310-01-066-6759, 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
66419-A
NSN: 5310-01-066-6759
FSC: 5310
CAGE: 45152 — OSHKOSH CORP (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON LOCKING INSERT
nut_styleHEXAGON
nut_height0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
temp_rating250.0 FAHRENHEIT MAXIMUM DEGF
thread_class3B
thread_seriesUNJC
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentZINC OVERALL EXCEPT INSERT
width_across_flats0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
nominal_thread_size0.250 INCHES IN
bearing_surface_typeCHAMFERED
NSN5310-01-066-6759
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 66419-A · 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: UNJC
•
THREAD CLASS: 3B
•
WIDTH ACROSS FLATS: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ZINC OVERALL EXCEPT INSERT
•
BEARING SURFACE TYPE: CHAMFERED
•
MATERIAL: STEEL OVERALL EXCEPT INSERT
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUNJC
THREAD CLASS3B
WIDTH ACROSS FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN
SURFACE TREATMENTZINC OVERALL EXCEPT INSERT
BEARING SURFACE TYPECHAMFERED
MATERIALSTEEL OVERALL EXCEPT INSERT
NOMINAL THREAD SIZE0.250 INCHES IN
MATERIALPLASTIC POLYAMIDE NYLON LOCKING INSERT
TEMP RATING250.0 FAHRENHEIT MAXIMUM DEGF
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
13171InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
503-9408-004InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
650526InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SN4InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MILE1-900InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
6303-2InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy 66419-A?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 66419-A?
66419-A is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 66419-A?
There are 18 known substitutes for 66419-A: 13171, 503-9408-004, 650526 and 15 more. Substitute compatibility should be verified for your specific system.
Is 66419-A still available?
66419-A is currently cancelled.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 66419-A