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M12133/8-1 — 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,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OVERALL, hole_diameter: 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN, overall_height: 0.034 INCHES NOMINAL IN, outside_diameter: 0.235 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN, style_designator: SPRING TENSION, surface_treatment: PASSIVATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5310-01-315-3804, 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
M12133/8-1
NSN: 5310-01-315-3804
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 302 OVERALL
hole_diameter0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
overall_height0.034 INCHES NOMINAL IN
outside_diameter0.235 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
style_designatorSPRING TENSION
surface_treatmentPASSIVATE OVERALL
material_thickness0.0050 INCHES MINIMUM AND 0.0070 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-5059 MIL SPEC ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-315-3804
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M12133/8-1 · 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
•
OUTSIDE DIAMETER: 0.235 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 302 OVERALL
•
STYLE DESIGNATOR: SPRING TENSION
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5059 MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
HOLE DIAMETER: 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER0.235 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
MATERIALSTEEL COMP 302 OVERALL
STYLE DESIGNATORSPRING TENSION
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059 MIL SPEC ALL MATERIAL RESPONSES OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
HOLE DIAMETER0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
OVERALL HEIGHT0.034 INCHES NOMINAL IN
MATERIAL THICKNESS0.0050 INCHES MINIMUM AND 0.0070 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
1735AS431-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SY1TMInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
NP-16.2-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SU1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
L3InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
623G4SInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M12133/8-1?
M12133/8-1 is a WASHER,SPRING TENSION.
What parts can replace M12133/8-1?
There are 15 known substitutes for M12133/8-1: 1735AS431-1, SY1TM, NP-16.2-1 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M12133/8-1?
M12133/8-1 is cataloged in the Federal Logistics Information System under NSN 5310-01-315-3804. This indicates validated use in U.S. government and defense supply chains.
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Last verified: October 2026