PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

303345Washer,spring Tension

Lockheed Martin Corporation Div Rms - Mitchel Field · NSN 5310-00-217-8059 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-217-8059 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-217-8059. Primary manufacturer part number: 303345.
Features
  • Washer,spring Tension — FSC 5310
  • Style Designator: SPRING TENSION
  • Hole Diameter: 0.114 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
  • Material Document and Classification: MIL-S-7947 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Material: STEEL COMP 1095 OVERALL
  • Material Thickness: 0.012 INCHES NOMINAL IN
  • Outside Diameter: 0.797 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN
  • Hardness Rating: 48.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
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 5310-00-217-8059, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-217-8059
Primary Part Number303345
Item NameWasher,spring Tension
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Rms - Mitchel Field
StatusACTIVE
Style DesignatorSPRING TENSION
Hole Diameter0.114 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN
Material Document and ClassificationMIL-S-7947 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MaterialSTEEL COMP 1095 OVERALL
Material Thickness0.012 INCHES NOMINAL IN
Outside Diameter0.797 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN
Hardness Rating48.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
Surface TreatmentCADMIUM OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
1680-00-347-659060-3345 INTERCHANGEABLE
Sleeve Assy,transmi
The Boeing Company Div Defense
5330-00-866-9638303345 INTERCHANGEABLE
Seal,plain Encased
Brp Us Inc
5841-00-871-4004303345 INTERCHANGEABLE
Baffle and Thermost
Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc.
6515-01-381-1684303345 INTERCHANGEABLE
Cannula,needleless Access System
Becton Dickinson and Co Becton Dickinson Div
5345-01-484-8005815.7480 INTERCHANGEABLE
Disk,abrasive
Desco Manufacturing Company Div Desco Manufacturing Co. Inc.
Cross-Reference Index
Part NumberManufacturer
303345 PRIMARY Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
Related Parts
1680-00-347-6590INTERCHANGEABLE
SLEEVE ASSY,TRANSMI
60-3345
5330-00-866-9638INTERCHANGEABLE
SEAL,PLAIN ENCASED
303345
5841-00-871-4004INTERCHANGEABLE
BAFFLE AND THERMOST
303345
6515-01-381-1684INTERCHANGEABLE
CANNULA,NEEDLELESS ACCESS SYSTEM
303345
5345-01-484-8005INTERCHANGEABLE
DISK,ABRASIVE
815.7480

Frequently Asked Questions

What is NSN 5310-00-217-8059?

NSN 5310-00-217-8059 is a Washer,spring Tension, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-217-8059?

NSN 5310-00-217-8059 has 1 cross-referenced part number: 303345 (Lockheed Martin Corporation Div Rms - Mitchel Field).

What NSN replaces 5310-00-217-8059?

There are 5 known substitutes for 5310-00-217-8059: 1680-00-347-6590, 5330-00-866-9638, 5841-00-871-4004 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 303345?

Key specifications for 303345: Style Designator: SPRING TENSION; Hole Diameter: 0.114 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN; Material Document and Classification: MIL-S-7947 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Material: STEEL COMP 1095 OVERALL. 9 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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