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Technical Data Sheet
PartsTable / COMPONENT / SU-4
SU-4 ✓ 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,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OVERALL, hole_diameter: 0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN, overall_height: 0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN, outside_diameter: 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, surface_treatment: PASSIVATE OVERALL, material_thickness: 0.007 INCHES MINIMUM AND 0.011 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-159-8570, 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
SU-4
NSN: 5310-01-159-8570
FSC: 5310
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialSTEEL COMP 302 OVERALL
hole_diameter0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
overall_height0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
outside_diameter0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
surface_treatmentPASSIVATE OVERALL
material_thickness0.007 INCHES MINIMUM AND 0.011 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classification186,CODE 216 MIL STD SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-159-8570
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: SU-4 · 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: 0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL THICKNESS: 0.007 INCHES MINIMUM AND 0.011 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 302 OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: 186,CODE 216 MIL STD SINGLE TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL THICKNESS0.007 INCHES MINIMUM AND 0.011 INCHES MAXIMUM IN
OUTSIDE DIAMETER0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
MATERIALSTEEL COMP 302 OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION186,CODE 216 MIL STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
OVERALL HEIGHT0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
8341Interchangeable
interchangeable cross-reference
interchangeable
D3-34Interchangeable
interchangeable cross-reference
interchangeable
11574618Interchangeable
Same NIIN cross-reference
interchangeable
L11574618Interchangeable
Same NIIN cross-reference
interchangeable
1903Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SU-4?
SU-4 is a WASHER,SPRING TENSION.
What parts can replace SU-4?
There are 5 known substitutes for SU-4: 8341, D3-34, 11574618 and 2 more. Substitute compatibility should be verified for your specific system.
Is SU-4 still available?
SU-4 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026