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Technical Data Sheet
PartsTable / COMPONENT / 43-1AND43-3
43-1AND43-3 ✓ 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 PIN,TOGGLE,EYE COLLAR is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 464 OVERALL, shank_length: 1.969 INCHES MINIMUM AND 2.031 INCHES MAXIMUM IN, shank_diameter: 0.359 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN, special_features: AS DIFFERENTIATED BY MATERIAL, SURFACE TREATMENT AND SHANK LENGTH, style_designator: EYE COLLAR, surface_treatment: ZINC COLLAR. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-221-6337, 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
43-1AND43-3
NSN: 5315-00-221-6337
FSC: 5315
CAGE: 95683 — GENERAL STORES SUPPLY OFFICE (USA)
SPECIFICATIONS
materialCOPPER ALLOY 464 OVERALL
shank_length1.969 INCHES MINIMUM AND 2.031 INCHES MAXIMUM IN
shank_diameter0.359 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
special_featuresAS DIFFERENTIATED BY MATERIAL, SURFACE TREATMENT AND SHANK LENGTH
style_designatorEYE COLLAR
surface_treatmentZINC COLLAR
eye_inside_diameter0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
eye_stock_thickness0.172 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN
collar_outside_diameter1.594 INCHES MINIMUM AND 1.656 INCHES MAXIMUM IN
criticality_code_justificationFEAT
material_document_and_classificationMIL-S-20166 MIL SPEC SINGLE MATERIAL RESPONSE COLLAR
NSN5315-00-221-6337
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 43-1AND43-3 · 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
•
SHANK DIAMETER: 0.359 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY 462 OR COPPER ALLOY 464 OR COPPER ALLOY 482 OR COPPER ALLOY 485 TOGGLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-20166 MIL SPEC SINGLE MATERIAL RESPONSE COLLAR
•
SURFACE TREATMENT: ZINC SHANK
•
CRITICALITY CODE JUSTIFICATION: FEAT
•
EYE INSIDE DIAMETER: 0.219 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SHANK DIAMETER0.359 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
SPECIAL FEATURESAS DIFFERENTIATED BY MATERIAL, SURFACE TREATMENT AND SHANK LENGTH
MATERIALCOPPER ALLOY 462 OR COPPER ALLOY 464 OR COPPER ALLOY 482 OR COPPER ALLOY 485 TOGGLE
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-20166 MIL SPEC SINGLE MATERIAL RESPONSE COLLAR
SURFACE TREATMENTZINC SHANK
CRITICALITY CODE JUSTIFICATIONFEAT
EYE INSIDE DIAMETER0.219 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-637 FED SPEC ALL MATERIAL RESPONSES TOGGLE
SURFACE TREATMENTZINC COLLAR
STYLE DESIGNATOREYE COLLAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
52387Interchangeable
interchangeable cross-reference
interchangeable
184112H1Interchangeable
interchangeable cross-reference
interchangeable
4-38Interchangeable
interchangeable cross-reference
interchangeable
438-432Interchangeable
interchangeable cross-reference
interchangeable
FF-B-187AInterchangeable
interchangeable cross-reference
interchangeable
43-1-43-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 43-1AND43-3?
43-1AND43-3 is a PIN,TOGGLE,EYE COLLAR.
What parts can replace 43-1AND43-3?
There are 22 known substitutes for 43-1AND43-3: 52387, 184112H1, 4-38 and 19 more. Substitute compatibility should be verified for your specific system.
Is 43-1AND43-3 still available?
43-1AND43-3 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026