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520806
✓ 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 GEAR,FACE is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-050-3345, 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
520806
NSN: 5310-00-050-3345 FSC: 5310 CAGE: R1120 — SATAIR A/S (DNK)
SPECIFICATIONS
general_characteristics_item_description CRES,AISI 416,HARD ROLLED; PASSIVATE; DIAMOND KNURLED; SPLINE TOOTH CUTTING,120 TEETH,2.500 IN. PITCH DIA,20 DEG PRESSURE ANGLE; 2.625 IN. OD IN NSN 5310-00-050-3345
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED
Hex NUT
CROSS-SECTION
WASHER OD: —
SIZE: —
MATERIAL: —
PN: 520806 · 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
• BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
• NOMINAL THREAD SIZE: 0.312 INCHES IN
• WIDTH ACROSS FLATS: 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
• LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
• THREAD DIRECTION: RIGHT-HAND
• THREAD QUANTITY PER INCH: 24
TECHNICAL CHARACTERISTICS (FLIS)
BEARING SURFACE TYPE CHAMFERED OR WASHER FACED NOMINAL THREAD SIZE 0.312 INCHES IN THREAD CLASS 3B WIDTH ACROSS FLATS 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN LOCKING FEATURE PREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT THREAD DIRECTION RIGHT-HAND THREAD QUANTITY PER INCH 24 MATERIAL STEEL NUT MATERIAL FIBER LOCKING INSERT TEMP RATING 250.0 FAHRENHEIT NOMINAL DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
123029-1 Interchangeable interchangeable cross-reference
interchangeable
503345 Interchangeable interchangeable cross-reference
interchangeable
203686 Interchangeable interchangeable cross-reference
interchangeable
2E441-504A Interchangeable interchangeable cross-reference
interchangeable
212678-3 Interchangeable interchangeable cross-reference
interchangeable
25078 Interchangeable interchangeable cross-reference
interchangeable
LIFECYCLE
Status CANCELLED
Availability —
RoHS Compliant EAR99 Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 520806?
520806 is a GEAR,FACE.
What parts can replace 520806?
There are 23 known substitutes for 520806: 123029-1, 503345, 203686 and 20 more. Substitute compatibility should be verified for your specific system.
Is 520806 still available?
520806 is currently cancelled.