PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

345570Washer,recessed

Lockheed Martin Corp · NSN 5310-00-285-8146 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-285-8146 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-285-8146. Primary manufacturer part number: 345570.
Features
  • Washer,recessed — FSC 5310
  • Material Thickness: 0.068 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN
  • Outside Diameter: 0.583 INCHES MINIMUM AND 0.603 INCHES MAXIMUM IN
  • Recess Diameter: 0.396 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
  • Hole Diameter: 0.315 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN
  • Material Document and Classification: MIL-S-6050 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Material: STEEL COMP 8630 OVERALL
  • Recess Angle: 88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 8630 Overall construction
General Description

The Washer,recessed, cataloged under National Stock Number 5310-00-285-8146, 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 Corp. 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-285-8146
Primary Part Number345570
Item NameWasher,recessed
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerLockheed Martin Corp
StatusCANCELLED
Material Thickness0.068 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN
Outside Diameter0.583 INCHES MINIMUM AND 0.603 INCHES MAXIMUM IN
Recess Diameter0.396 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN
Hole Diameter0.315 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN
Material Document and ClassificationMIL-S-6050 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MaterialSTEEL COMP 8630 OVERALL
Recess Angle88.0 DEGREES MINIMUM AND 92.0 DEGREES MAXIMUM
Style DesignatorRECESSED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
6240-00-902-4660120PSB INTERCHANGEABLE
Lamp,incandescent
Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
5998-01-148-0118003455-070 INTERCHANGEABLE
Circuit Card Assembly
Dynalec Corporation
Cross-Reference Index
Part NumberManufacturer
345570 PRIMARY Lockheed Martin Corp (USA)
Related Parts
6240-00-902-4660INTERCHANGEABLE
LAMP,INCANDESCENT
120PSB
5998-01-148-0118INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
003455-070

Frequently Asked Questions

What is NSN 5310-00-285-8146?

NSN 5310-00-285-8146 is a Washer,recessed, manufactured by Lockheed Martin Corp, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-285-8146?

NSN 5310-00-285-8146 has 1 cross-referenced part number: 345570 (Lockheed Martin Corp).

What NSN replaces 5310-00-285-8146?

There are 2 known substitutes for 5310-00-285-8146: 6240-00-902-4660, 5998-01-148-0118. Verify interchangeability with system specifications before substitution.

What are the specifications of 345570?

Key specifications for 345570: Material Thickness: 0.068 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN; Outside Diameter: 0.583 INCHES MINIMUM AND 0.603 INCHES MAXIMUM IN; Recess Diameter: 0.396 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN; Hole Diameter: 0.315 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-285-8146 still in active supply?

NSN 5310-00-285-8146 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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