PartsTable
Technical Data Sheet
Download PDF

288-1552 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

288-1552: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY OVERALL, hole_diameter: 0.281 INCHES NOMINAL IN, overall_width: 0.500 INCHES NOMINAL IN, special_features: 2 HOLES AND RECTANGULAR SHAPED, style_designator: KEY, surface_treatment: CHROMATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-976-0221, 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
288-1552
NSN: 5310-00-976-0221
FSC: 5310 — Nuts and Washers
CAGE: 11530 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN INFORMATION SYSTEMS & GLOBAL SOLUTIONS (USA)
SPECIFICATIONS
materialALUMINUM ALLOY OVERALL
hole_diameter0.281 INCHES NOMINAL IN
overall_width0.500 INCHES NOMINAL IN
special_features2 HOLES AND RECTANGULAR SHAPED
style_designatorKEY
surface_treatmentCHROMATE OVERALL
material_thickness0.031 INCHES NOMINAL IN
external_prebent_key_width0.120 INCHES NOMINAL IN
external_prebent_key_length0.094 INCHES NOMINAL IN
overall_distance_including_keys1.250 INCHES NOMINAL IN
surface_treatment_document_and_classificationMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
distance_from_centerline_to_inside_of_prebent_key0.234 INCHES NOMINAL IN
NSN5310-00-976-0221
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 288-1552 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY: 0.234 INCHES NOMINAL IN
•
EXTERNAL PREBENT KEY LENGTH: 0.094 INCHES NOMINAL IN
•
OVERALL DISTANCE INCLUDING KEYS: 1.250 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL THICKNESS: 0.031 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY0.234 INCHES NOMINAL IN
EXTERNAL PREBENT KEY LENGTH0.094 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS1.250 INCHES NOMINAL IN
STYLE DESIGNATORKEY
OVERALL WIDTH0.500 INCHES NOMINAL IN
MATERIAL THICKNESS0.031 INCHES NOMINAL IN
SPECIAL FEATURES2 HOLES AND RECTANGULAR SHAPED
SURFACE TREATMENTCHROMATE OVERALL
EXTERNAL PREBENT KEY WIDTH0.120 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 2
1537592Reference document
Same NSN cross-reference
Reference document — Secondary reference
6005000033Same 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
Ready to buy 288-1552?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 288-1552?
288-1552 is a WASHER,KEY.
What parts can replace 288-1552?
There are 2 known substitutes for 288-1552: 1537592, 6005000033. Substitute compatibility should be verified for your specific system.
What is the NSN for 288-1552?
288-1552 is cataloged in the U.S. Government catalog under NSN 5310-00-976-0221. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 288-1552

✓ 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.