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180288 ✓ 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,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1060 OR STEEL COMP 1065 OR STEEL COMP 1070 OR STEEL COMP 1075 OR STEEL COMP 1080 OVERALL, hole_diameter: 0.320 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN, outside_diameter: 0.590 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, material_thickness: 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN, nondefinitive_spec/std_data: A TYPE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-018-0288, 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
180288
NSN: 5310-00-018-0288
FSC: 5310
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
materialSTEEL COMP 1060 OR STEEL COMP 1065 OR STEEL COMP 1070 OR STEEL COMP 1075 OR STEEL COMP 1080 OVERALL
hole_diameter0.320 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
outside_diameter0.590 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
material_thickness0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
nondefinitive_spec/std_dataA TYPE
NSN5310-00-018-0288
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 180288 · 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
•
MATERIAL: STEEL COMP 1060 OR STEEL COMP 1065 OR STEEL COMP 1070 OR STEEL COMP 1075 OR STEEL COMP 1080 OVERALL
•
NONDEFINITIVE SPEC/STD DATA: A TYPE
•
MATERIAL DOCUMENT AND CLASSIFICATION: -QQ-S-633 CANC FED SPEC 1ST MATERIAL RESPONSE OR -QQ-S-633 CANC FED SPEC 2ND MATERIAL RESPONSE OR -QQ-S-633 CANC FED SPEC 3RD MATERIAL RESPONSE OR -QQ-S-633 CANC FED SPEC 4TH MATERIAL RESPONSE OR -QQ-S-633 CANC FED SPEC 5TH MATERIAL RESPONSE OVERALL
•
HOLE DIAMETER: 0.320 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
MATERIAL THICKNESS: 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.590 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 1060 OR STEEL COMP 1065 OR STEEL COMP 1070 OR STEEL COMP 1075 OR STEEL COMP 1080 OVERALL
NONDEFINITIVE SPEC/STD DATAA TYPE
MATERIAL DOCUMENT AND CLASSIFICATION-QQ-S-633 CANC FED SPEC 1ST MATERIAL RESPONSE OR -QQ-S-633 CANC FED SPEC 2ND MATERIAL RESPONSE OR -QQ-S-633 CANC FED SPEC 3RD MATERIAL RESPONSE OR -QQ-S-633 CANC FED SPEC 4TH MATERIAL RESPONSE OR -QQ-S-633 CANC FED SPEC 5TH MATERIAL RESPONSE OVERALL
HOLE DIAMETER0.320 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
STYLE DESIGNATORFLAT INTERNAL TEETH
MATERIAL THICKNESS0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.590 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
91-6C1Interchangeable
interchangeable cross-reference
interchangeable
91-601Interchangeable
interchangeable cross-reference
interchangeable
839049Interchangeable
interchangeable cross-reference
interchangeable
10121848Interchangeable
interchangeable cross-reference
interchangeable
N04BInterchangeable
interchangeable cross-reference
interchangeable
JHP42-124Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 180288?
180288 is a WASHER,LOCK.
What parts can replace 180288?
There are 12 known substitutes for 180288: 91-6C1, 91-601, 839049 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 180288?
180288 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-018-0288. 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