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Technical Data Sheet
PartsTable / COMPONENT / NAS1288-3W
NAS1288-3W ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The WASHER,CONCAVE is a the manufacturer industrial component. Key specifications include radius: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN, material: STEEL OVERALL, recess_depth: 0.035 INCHES NOMINAL IN, hole_diameter: 0.230 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN, hardness_rating: 41.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM, outside_diameter: 0.365 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-435-5839, 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
NAS1288-3W
NSN: 5310-00-435-5839
FSC: 5310
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
radius0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
materialSTEEL OVERALL
recess_depth0.035 INCHES NOMINAL IN
hole_diameter0.230 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN
hardness_rating41.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
outside_diameter0.365 INCHES MAXIMUM IN
style_designatorCONCAVE
material_thickness0.045 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
specification/standard_data80205-NAS1288 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
material_document_and_classificationAMS6304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-435-5839
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: NAS1288-3W · 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
•
HOLE DIAMETER: 0.230 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN
•
SPECIFICATION/STANDARD DATA: 80205-NAS1288 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS6304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
RADIUS: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.045 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CONCAVE
•
MATERIAL: STEEL OVERALL
•
HARDNESS RATING: 41.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.230 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN
SPECIFICATION/STANDARD DATA80205-NAS1288 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MATERIAL DOCUMENT AND CLASSIFICATIONAMS6304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
RADIUS0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
MATERIAL THICKNESS0.045 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
STYLE DESIGNATORCONCAVE
MATERIALSTEEL OVERALL
HARDNESS RATING41.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM
OUTSIDE DIAMETER0.365 INCHES MAXIMUM IN
RECESS DEPTH0.035 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
BX-9434Interchangeable
interchangeable cross-reference
interchangeable
5975Interchangeable
interchangeable cross-reference
interchangeable
213307-4Interchangeable
interchangeable cross-reference
interchangeable
40840Interchangeable
interchangeable cross-reference
interchangeable
SK144243Interchangeable
interchangeable cross-reference
interchangeable
15163PInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS1288-3W?
NAS1288-3W is a WASHER,CONCAVE.
What parts can replace NAS1288-3W?
There are 6 known substitutes for NAS1288-3W: BX-9434, 5975, 213307-4 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for NAS1288-3W?
NAS1288-3W is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-435-5839. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026