PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40956Washer,flat

Lockheed Martin Corporation Div Rms - Mitchel Field · NSN 5310-00-044-6183 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-044-6183 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-044-6183. Primary manufacturer part number: 40956.
Features
  • Washer,flat — FSC 5310
  • Overall Diameter: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
  • Material: COPPER ALLOY OVERALL
  • Peripheral Shape Style: ROUND
  • Hole Diameter: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
  • Thickness: 0.036 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
  • Cross-Sectional Shape Style: RECTANGULAR
  • Center Hole Shape Style: ROUND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-044-6183, 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 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-044-6183
Primary Part Number40956
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Rms - Mitchel Field
StatusCANCELLED
Overall Diameter0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
MaterialCOPPER ALLOY OVERALL
Peripheral Shape StyleROUND
Hole Diameter0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
Thickness0.036 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
Cross-Sectional Shape StyleRECTANGULAR
Center Hole Shape StyleROUND
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
5305-00-147-65220419 INTERCHANGEABLE
Screw,machine
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
4820-01-235-8507 INTERCHANGEABLE
Ball,valve,ported
3110-01-304-9190 INTERCHANGEABLE
Roller,bearing
3110-01-581-929211511 INTERCHANGEABLE
Roller,bearing
Generac Mobile Products, Llc
Cross-Reference Index
Part NumberManufacturer
40956 PRIMARY Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
446179 Chrysler Realty Company Llc Dba Daimler Chrysler (USA)
Related Parts
5305-00-147-6522INTERCHANGEABLE
SCREW,MACHINE
0419
4820-01-235-8507INTERCHANGEABLE
BALL,VALVE,PORTED
3110-01-304-9190INTERCHANGEABLE
ROLLER,BEARING
3110-01-581-9292INTERCHANGEABLE
ROLLER,BEARING
11511

Frequently Asked Questions

What is NSN 5310-00-044-6183?

NSN 5310-00-044-6183 is a Washer,flat, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-044-6183?

NSN 5310-00-044-6183 has 2 cross-referenced part numbers: 40956 (Lockheed Martin Corporation Div Rms - Mitchel Field), 446179 (Chrysler Realty Company Llc Dba Daimler Chrysler).

What NSN replaces 5310-00-044-6183?

There are 4 known substitutes for 5310-00-044-6183: 5305-00-147-6522, 4820-01-235-8507, 3110-01-304-9190 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40956?

Key specifications for 40956: Overall Diameter: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN; Material: COPPER ALLOY OVERALL; Peripheral Shape Style: ROUND; Hole Diameter: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-044-6183 still in active supply?

NSN 5310-00-044-6183 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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