PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

M12133/8-9Washer,spring Tension

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-01-358-3668 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-358-3668 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-358-3668. Primary manufacturer part number: M12133/8-9.
Features
  • Washer,spring Tension — FSC 5310
  • Hole Diameter: 0.265 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN
  • Surface Treatment Document and Classification: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
  • Material Document and Classification: MIL-S-5059,1/2 HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Surface Treatment: PASSIVATE OVERALL
  • Specification/standard Data: 81349-MIL-W-12133/8 GOVERNMENT SPECIFICATION
  • Outside Diameter: 0.480 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN
  • Style Designator: SPRING TENSION
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Mechanical energy storage
  • Vibration dampening
General Description

The Washer,spring Tension, cataloged under National Stock Number 5310-01-358-3668, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-358-3668
Primary Part NumberM12133/8-9
Item NameWasher,spring Tension
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Hole Diameter0.265 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN
Surface Treatment Document and ClassificationASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
Material Document and ClassificationMIL-S-5059,1/2 HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Surface TreatmentPASSIVATE OVERALL
Specification/standard Data81349-MIL-W-12133/8 GOVERNMENT SPECIFICATION
Outside Diameter0.480 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN
Style DesignatorSPRING TENSION
MaterialSTEEL COMP 302 OVERALL
Material Thickness0.010 INCHES MINIMUM AND 0.012 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5310-01-311-0005 INTERCHANGEABLE
Washer,spring Tension
5310-01-315-3804 INTERCHANGEABLE
Washer,spring Tension
5310-01-330-2353 INTERCHANGEABLE
Washer,spring Tension
5310-01-335-3393 INTERCHANGEABLE
Washer,spring Tension
5310-01-355-0170 INTERCHANGEABLE
Washer,spring Tension
5310-01-355-2705 INTERCHANGEABLE
Washer,spring Tension
5310-01-372-0285 INTERCHANGEABLE
Washer,spring Tension
Cross-Reference Index
Part NumberManufacturer
M12133/8-9 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-W-12133/8 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5310-01-311-0005INTERCHANGEABLE
WASHER,SPRING TENSION
5310-01-315-3804INTERCHANGEABLE
WASHER,SPRING TENSION
5310-01-330-2353INTERCHANGEABLE
WASHER,SPRING TENSION
5310-01-335-3393INTERCHANGEABLE
WASHER,SPRING TENSION
5310-01-355-0170INTERCHANGEABLE
WASHER,SPRING TENSION
5310-01-355-2705INTERCHANGEABLE
WASHER,SPRING TENSION
5310-01-372-0285INTERCHANGEABLE
WASHER,SPRING TENSION

Frequently Asked Questions

What is NSN 5310-01-358-3668?

NSN 5310-01-358-3668 is a Washer,spring Tension, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-358-3668?

NSN 5310-01-358-3668 has 2 cross-referenced part numbers: M12133/8-9 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-W-12133/8 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5310-01-358-3668?

There are 7 known substitutes for 5310-01-358-3668: 5310-01-311-0005, 5310-01-315-3804, 5310-01-330-2353 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of M12133/8-9?

Key specifications for M12133/8-9: Hole Diameter: 0.265 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Material Document and Classification: MIL-S-5059,1/2 HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Surface Treatment: PASSIVATE OVERALL. 10 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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