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A1533 ✓ 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,FLAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, end_style: SHORT TWISTED HOOK BOTH ENDS, design_type: CLOSED, hook_radius: 0.046 INCHES NOMINAL BOTH ENDS IN, load_rating: 5.000 POUNDS NOMINAL LBS, coil_quantity: 21-1/2. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-012-0393, 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
A1533
NSN: 5310-00-012-0393
FSC: 5310
CAGE: 34623 — AM GENERAL LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
end_styleSHORT TWISTED HOOK BOTH ENDS
design_typeCLOSED
hook_radius0.046 INCHES NOMINAL BOTH ENDS IN
load_rating5.000 POUNDS NOMINAL LBS
coil_quantity21-1/2
style_designatorCYLINDRICAL
surface_treatmentOXIDE OVERALL
spring_free_length0.755 INCHES NOMINAL IN
coil_helix_directionRIGHT-HAND OR LEFT-HAND
spring_length_under_load1.250 INCHES NOMINAL IN
coil_to_hook_inside_length0.188 INCHES NOMINAL BOTH ENDS IN
NSN5310-00-012-0393
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A1533 · 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 DIAMETER: 0.688 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 COMP FS1010 TO FS1020-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
NONDEFINITIVE SPEC/STD DATA: A TYPE
•
DEPARTURE FROM CITED DOCUMENT: AS MODIFIEDBY SURFACE FINISH
•
PERIPHERAL SHAPE STYLE: ROUND
•
CENTER HOLE SHAPE STYLE: ROUND
•
THICKNESS: 0.065 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER0.688 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 COMP FS1010 TO FS1020-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NONDEFINITIVE SPEC/STD DATAA TYPE
DEPARTURE FROM CITED DOCUMENTAS MODIFIEDBY SURFACE FINISH
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.065 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.344 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
S37170Interchangeable
interchangeable cross-reference
interchangeable
P-8-60Interchangeable
interchangeable cross-reference
interchangeable
P8-C2-B60Interchangeable
interchangeable cross-reference
interchangeable
84001-1Interchangeable
interchangeable cross-reference
interchangeable
12387279-12Interchangeable
interchangeable cross-reference
interchangeable
V11-001-028Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A1533?
A1533 is a WASHER,FLAT.
What parts can replace A1533?
There are 26 known substitutes for A1533: S37170, P-8-60, P8-C2-B60 and 23 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A1533?
A1533 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-012-0393. 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