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566A004775 — NUT,STOP

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

566A004775: NUT,STOP.

The NUT,STOP is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: COPPER ALLOY,QQ-P-330 COMP A HARD; 0.500 IN. LG; 0.375 IN.

W; 0.312 IN. HT; 0.062 IN. TABS; 0.312-18 UNC 3B THD HOLE IN.

This part is cataloged in the U.S. Government catalog under NSN 5310-00-896-6437, 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
566A004775
NSN: 5310-00-896-6437
FSC: 5310 — Nuts and Washers
CAGE: 34228 — L3 TECHNOLOGIES, INC. DIV L3 KEO (USA)
SPECIFICATIONS
general_characteristics_item_descriptionCOPPER ALLOY,QQ-P-330 COMP A HARD; 0.500 IN. LG; 0.375 IN. W; 0.312 IN. HT; 0.062 IN. TABS; 0.312-18 UNC 3B THD HOLE IN
NSN5310-00-896-6437
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 566A004775 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: COPPER ALLOY,QQ-P-330 COMP A HARD; 0.500 IN. LG; 0.375 IN. W; 0.312 IN. HT; 0.062 IN. TABS; 0.312-18 UNC 3B THD HOLE IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONCOPPER ALLOY,QQ-P-330 COMP A HARD; 0.500 IN. LG; 0.375 IN. W; 0.312 IN. HT; 0.062 IN. TABS; 0.312-18 UNC 3B THD HOLE IN
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
A566-139Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 566A004775?
566A004775 is a NUT,STOP.
What parts can replace 566A004775?
There is 1 known substitute for 566A004775: A566-139. Substitute compatibility should be verified for your specific system.
What is the NSN for 566A004775?
566A004775 is cataloged in the U.S. Government catalog under NSN 5310-00-896-6437. 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.