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578112-1 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

578112-1: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1010 OVERALL, hole_diameter: 2.156 INCHES NOMINAL IN, outside_diameter: 2.500 INCHES NOMINAL IN, special_features: ALL KEYS PREBENT SAME DIRECTION, style_designator: EXTERNAL AND INTERNAL PRE-BENT KEYS, material_thickness: 0.042 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-919-3685, 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
578112-1
NSN: 5310-00-919-3685
FSC: 5310 — Nuts and Washers
CAGE: 6K4C8 — GOODRICH CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP 1010 OVERALL
hole_diameter2.156 INCHES NOMINAL IN
outside_diameter2.500 INCHES NOMINAL IN
special_featuresALL KEYS PREBENT SAME DIRECTION
style_designatorEXTERNAL AND INTERNAL PRE-BENT KEYS
material_thickness0.042 INCHES NOMINAL IN
external_key_quantity2
internal_key_quantity2
external_prebent_key_width0.250 INCHES NOMINAL IN
internal_prebent_key_width0.164 INCHES NOMINAL IN
internal_prebent_key_length0.250 INCHES NOMINAL IN
overall_distance_including_keys3.000 INCHES NOMINAL IN
NSN5310-00-919-3685
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 578112-1 · 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
•
INTERNAL PREBENT KEY WIDTH: 0.164 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 3.000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: EXTERNAL AND INTERNAL PRE-BENT KEYS
•
OUTSIDE DIAMETER: 2.500 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.042 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 2
•
INTERNAL PREBENT KEY LENGTH: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
INTERNAL PREBENT KEY WIDTH0.164 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS3.000 INCHES NOMINAL IN
STYLE DESIGNATOREXTERNAL AND INTERNAL PRE-BENT KEYS
OUTSIDE DIAMETER2.500 INCHES NOMINAL IN
MATERIAL THICKNESS0.042 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY2
INTERNAL PREBENT KEY LENGTH0.250 INCHES NOMINAL IN
SPECIAL FEATURESALL KEYS PREBENT SAME DIRECTION
EXTERNAL PREBENT KEY WIDTH0.250 INCHES NOMINAL IN
MATERIALSTEEL COMP 1010 OVERALL
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 578112-1?
578112-1 is a WASHER,KEY.
What is the NSN for 578112-1?
578112-1 is cataloged in the U.S. Government catalog under NSN 5310-00-919-3685. 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.