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557225 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

557225: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 304 AND STEEL COMP 302 OVERALL, hole_diameter: 0.890 INCHES NOMINAL IN, hardness_rating: 83.0 ROCKWELL SUPERFICIAL 15-T MINIMUM AND 93.0 ROCKWELL SUPERFICIAL 15-T MAXIMUM, outside_diameter: 1.080 INCHES NOMINAL IN, material_thickness: 0.031 INCHES NOMINAL IN, external_prebent_key_width: 0.260 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-166-6151, 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
557225
NSN: 5310-01-166-6151
FSC: 5310 — Nuts and Washers
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL COMP 304 AND STEEL COMP 302 OVERALL
hole_diameter0.890 INCHES NOMINAL IN
hardness_rating83.0 ROCKWELL SUPERFICIAL 15-T MINIMUM AND 93.0 ROCKWELL SUPERFICIAL 15-T MAXIMUM
outside_diameter1.080 INCHES NOMINAL IN
material_thickness0.031 INCHES NOMINAL IN
external_key_quantity3
external_prebent_key_width0.260 INCHES NOMINAL IN
overall_distance_including_keys1.240 INCHES NOMINAL IN
material_document_and_classificationAMS 5513 ASSN STD 1ST MATERIAL RESPONSE AND MIL-S-5059 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
NSN5310-01-166-6151
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 557225 · 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
•
OVERALL DISTANCE INCLUDING KEYS: 1.240 INCHES NOMINAL IN
•
HARDNESS RATING: 83.0 ROCKWELL SUPERFICIAL 15-T MINIMUM AND 93.0 ROCKWELL SUPERFICIAL 15-T MAXIMUM
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5513 ASSN STD 1ST MATERIAL RESPONSE AND MIL-S-5059 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 1.080 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.031 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 3
•
EXTERNAL PREBENT KEY WIDTH: 0.260 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 304 AND STEEL COMP 302 OVERALL
TECHNICAL CHARACTERISTICS
OVERALL DISTANCE INCLUDING KEYS1.240 INCHES NOMINAL IN
HARDNESS RATING83.0 ROCKWELL SUPERFICIAL 15-T MINIMUM AND 93.0 ROCKWELL SUPERFICIAL 15-T MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5513 ASSN STD 1ST MATERIAL RESPONSE AND MIL-S-5059 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER1.080 INCHES NOMINAL IN
MATERIAL THICKNESS0.031 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY3
EXTERNAL PREBENT KEY WIDTH0.260 INCHES NOMINAL IN
MATERIALSTEEL COMP 304 AND STEEL COMP 302 OVERALL
HOLE DIAMETER0.890 INCHES NOMINAL 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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 557225?
557225 is a WASHER,KEY.
What is the NSN for 557225?
557225 is cataloged in the U.S. Government catalog under NSN 5310-01-166-6151. 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.