PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

216440Washer,lock

Lockheed Martin Corporation Div Rms - Mitchel Field · NSN 5310-00-209-4951 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-209-4951 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-209-4951. Primary manufacturer part number: 216440.
Features
  • Washer,lock — FSC 5310
  • Material: COPPER ALLOY OVERALL
  • Style Designator: FLAT INTERNAL TEETH
  • Surface Treatment: NICKEL OVERALL
  • Hole Diameter: 0.380 INCHES MINIMUM AND 0.387 INCHES MAXIMUM IN
  • Material Thickness: 0.018 INCHES NOMINAL IN
  • Outside Diameter: 0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM IN
  • 3 verified cross-references
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy Overall construction
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-209-4951, 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 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-209-4951
Primary Part Number216440
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Rms - Mitchel Field
StatusCANCELLED
MaterialCOPPER ALLOY OVERALL
Style DesignatorFLAT INTERNAL TEETH
Surface TreatmentNICKEL OVERALL
Hole Diameter0.380 INCHES MINIMUM AND 0.387 INCHES MAXIMUM IN
Material Thickness0.018 INCHES NOMINAL IN
Outside Diameter0.557 INCHES MINIMUM AND 0.567 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5905-00-240-7980 INTERCHANGEABLE
Resistor,fixed,film
5310-00-274-8214117804H INTERCHANGEABLE
Nut,plain,slotted,hexagon
Navistar Intl Corp Truck Br Ohio Plant
6145-00-295-0855UL62SOOW6BCK3/10EPCPE INTERCHANGEABLE
Cable,power,electrical
Underwriters Laboratories Inc
5950-00-432-087119205 INTERCHANGEABLE
Reactor
Freed Transformer Co
5910-00-553-666819205 INTERCHANGEABLE
Capacitor,fixed,paper Dielectric
Thales Usa, Inc. Div Air Mobility Solutions ("ams")
6610-00-580-9363EA321-22 INTERCHANGEABLE
Indicator,position
Simmonds Precision Products Inc
6140-00-712-305319205-001 INTERCHANGEABLE
Battery,storage
Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company
6145-00-765-4280 INTERCHANGEABLE
Braid,wire
5306-01-101-4549 INTERCHANGEABLE
Bolt,machine
3040-01-300-105619205 INTERCHANGEABLE
Plate,divider
Rockford Powertrain Inc Div Powertrain Rockford, Inc.
Cross-Reference Index
Part NumberManufacturer
1920-5 Itw Shakeproof Automotive Products (USA)
216440 PRIMARY Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
1855082 Zf Industrieantriebe Witten Gmbh (DEU)
Related Parts
5905-00-240-7980INTERCHANGEABLE
RESISTOR,FIXED,FILM
5310-00-274-8214INTERCHANGEABLE
NUT,PLAIN,SLOTTED,HEXAGON
117804H
6145-00-295-0855INTERCHANGEABLE
CABLE,POWER,ELECTRICAL
UL62SOOW6BCK3/10EPCPE
5950-00-432-0871INTERCHANGEABLE
REACTOR
19205
5910-00-553-6668INTERCHANGEABLE
CAPACITOR,FIXED,PAPER DIELECTRIC
19205
6610-00-580-9363INTERCHANGEABLE
INDICATOR,POSITION
EA321-22
6140-00-712-3053INTERCHANGEABLE
BATTERY,STORAGE
19205-001
6145-00-765-4280INTERCHANGEABLE
BRAID,WIRE
5306-01-101-4549INTERCHANGEABLE
BOLT,MACHINE
3040-01-300-1056INTERCHANGEABLE
PLATE,DIVIDER
19205
5330-01-483-7372INTERCHANGEABLE
SEAL,PLAIN
216440
1620-01-714-0806INTERCHANGEABLE
PIN,METERING,LANDING GEAR
19205-1

Frequently Asked Questions

What is NSN 5310-00-209-4951?

NSN 5310-00-209-4951 is a Washer,lock, 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 5310-00-209-4951?

NSN 5310-00-209-4951 has 3 cross-referenced part numbers: 1920-5 (Itw Shakeproof Automotive Products), 216440 (Lockheed Martin Corporation Div Rms - Mitchel Field), 1855082 (Zf Industrieantriebe Witten Gmbh).

What NSN replaces 5310-00-209-4951?

There are 12 known substitutes for 5310-00-209-4951: 5905-00-240-7980, 5310-00-274-8214, 6145-00-295-0855 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 216440?

Key specifications for 216440: Material: COPPER ALLOY OVERALL; Style Designator: FLAT INTERNAL TEETH; Surface Treatment: NICKEL OVERALL; Hole Diameter: 0.380 INCHES MINIMUM AND 0.387 INCHES MAXIMUM IN. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-209-4951 still in active supply?

NSN 5310-00-209-4951 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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