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310-0778-020 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

310-0778-020: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, hole_diameter: 0.120 INCHES MINIMUM AND 0.120 INCHES MINIMUM AND 0.124 INCHES MAXIMUM0.124 INCHES MAXIMUM IN, overall_height: 0.016 INCHES NOMINAL0.016 INCHES NOMINAL IN, outside_diameter: 0.160 INCHES NOMINAL0.160 INCHES NOMINAL IN, special_features: 24 BENDS EQUALLY SPACED24 BENDS EQUALLY SPACED, surface_treatment: GOLD OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-065-2645, 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
310-0778-020
NSN: 5310-01-065-2645
FSC: 5310 — Nuts and Washers
CAGE: 13499 — ROCKWELL COLLINS, INC. DBA COLLINS AEROSPACE GOVERNMENT SYSTEMS DIV COLLINS AEROSPACE - GOVERNMENT SYSTEMS (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
hole_diameter0.120 INCHES MINIMUM AND 0.120 INCHES MINIMUM AND 0.124 INCHES MAXIMUM0.124 INCHES MAXIMUM IN
overall_height0.016 INCHES NOMINAL0.016 INCHES NOMINAL IN
outside_diameter0.160 INCHES NOMINAL0.160 INCHES NOMINAL IN
special_features24 BENDS EQUALLY SPACED24 BENDS EQUALLY SPACED
surface_treatmentGOLD OVERALL
material_thickness0.006 INCHES NOMINAL0.006 INCHES NOMINAL IN
NSN5310-01-065-2645
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 310-0778-020 · 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
•
OUTSIDE DIAMETER: 0.160 INCHES NOMINAL0.160 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.006 INCHES NOMINAL0.006 INCHES NOMINAL IN
•
SURFACE TREATMENT: GOLD OVERALL
•
MATERIAL: COPPER ALLOY OVERALL
•
HOLE DIAMETER: 0.120 INCHES MINIMUM AND 0.120 INCHES MINIMUM AND 0.124 INCHES MAXIMUM0.124 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.016 INCHES NOMINAL0.016 INCHES NOMINAL IN
OUTSIDE DIAMETER0.160 INCHES NOMINAL0.160 INCHES NOMINAL IN
MATERIAL THICKNESS0.006 INCHES NOMINAL0.006 INCHES NOMINAL IN
SPECIAL FEATURES24 BENDS EQUALLY SPACED24 BENDS EQUALLY SPACED
SURFACE TREATMENTGOLD OVERALL
MATERIALCOPPER ALLOY OVERALL
HOLE DIAMETER0.120 INCHES MINIMUM AND 0.120 INCHES MINIMUM AND 0.124 INCHES MAXIMUM0.124 INCHES MAXIMUM 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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 310-0778-020?
310-0778-020 is a WASHER,LOCK.
What is the NSN for 310-0778-020?
310-0778-020 is cataloged in the U.S. Government catalog under NSN 5310-01-065-2645. 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.