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1810-100 ITEM 15 — Technical Data Sheet

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— · 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 410 OVERALL, hole_diameter: 0.195 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM, outside_diameter: 0.365 INCHES MINIMUM AND 0.381 INCHES MAXIMUM IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the Federal Logistics Information System under NSN 5310-00-543-5933, 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
1810-100 ITEM 15
NSN: 5310-00-543-5933
FSC: 5310
CAGE: 0SXY8 — HYDRACON COMPANY, INC (USA)
SPECIFICATIONS
materialSTEEL COMP 410 OVERALL
hole_diameter0.195 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN
hardness_rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
outside_diameter0.365 INCHES MINIMUM AND 0.381 INCHES MAXIMUM IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentPASSIVATE OVERALL
material_thickness0.020 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
end_item_identificationMULTIPLE LAUNCH ROCKET SYSTEM (MLRS); ARMORED MULTI-PURPOSE VEHICLE (AMPV); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationQQ-P-35,TY 2 OR TY 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-543-5933
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1810-100 ITEM 15 · 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 410 OVERALL
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35,TY 2 OR TY 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL THICKNESS: 0.020 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS
MATERIALSTEEL COMP 410 OVERALL
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS); ARMORED MULTI-PURPOSE VEHICLE (AMPV); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
STYLE DESIGNATORFLAT INTERNAL TEETH
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35,TY 2 OR TY 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL THICKNESS0.020 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE OVERALL
OUTSIDE DIAMETER0.365 INCHES MINIMUM AND 0.381 INCHES MAXIMUM IN
HOLE DIAMETER0.195 INCHES MINIMUM AND 0.204 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 29
16A138InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
17100-0InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
22153InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
10-405InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
FFS92InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
955617-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1810-100 ITEM 15?
1810-100 ITEM 15 is a WASHER,LOCK.
What parts can replace 1810-100 ITEM 15?
There are 29 known substitutes for 1810-100 ITEM 15: 16A138, 17100-0, 22153 and 26 more. Substitute compatibility should be verified for your specific system.
Is 1810-100 ITEM 15 still available?
1810-100 ITEM 15 is currently cancelled.
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Last verified: September 2026