PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21612Washer,lock

Industrial Technologies and Services Llc · NSN 5310-00-687-7199 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-687-7199 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-687-7199. Primary manufacturer part number: 21612.
Features
  • Washer,lock — FSC 5310
  • Hole Diameter: 0.382 INCHES MINIMUM AND 0.393 INCHES MAXIMUM IN
  • Surface Treatment: CADMIUM OVERALL
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Material Thickness: 0.094 INCHES NOMINAL IN
  • Material: STEEL OVERALL
  • Outside Diameter: 0.688 INCHES NOMINAL IN
  • 4 verified cross-references
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-687-7199, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Industrial Technologies and Services Llc. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 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: Active.

Technical Specifications
ParameterValue
NSN5310-00-687-7199
Primary Part Number21612
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerIndustrial Technologies and Services Llc
StatusACTIVE
Hole Diameter0.382 INCHES MINIMUM AND 0.393 INCHES MAXIMUM IN
Surface TreatmentCADMIUM OVERALL
Style DesignatorSPLIT HELICAL-RIGHT HAND
Material Thickness0.094 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Outside Diameter0.688 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5977-00-038-1499 INTERCHANGEABLE
Brush,electrical Contact
5315-00-089-010721612 INTERCHANGEABLE
Pin,straight,headless
Unison Industries Llc
5930-00-332-0041G330105S1 INTERCHANGEABLE
Switch,rotary
L3harris Technologies, Inc Div Space & Airborne Systems
2910-00-358-5057K02031 INTERCHANGEABLE
Pump,fuel,cam Actuated
Hyster-Yale Group, Inc. Dba Yale Materials Handling
2805-00-423-3278691583 INTERCHANGEABLE
Insert,engine Valve Seat
Briggs and Stratton Corp
4220-00-511-8299 INTERCHANGEABLE
Life Raft,inflatable
5365-00-514-25016166350 INTERCHANGEABLE
Shim
U S Army Tank Automotive Command Amsta-Im-Mm
4820-00-563-6316216-12 INTERCHANGEABLE
Disk,valve
Ontic Engineering & Manufacturing, Inc Dba Ontic Us
2530-00-725-1668308151C91 INTERCHANGEABLE
Cylinder,hydraulic Brake,wheel
Navistar Intl Corp Truck Br Ohio Plant
5935-00-752-27062127-0001-02 INTERCHANGEABLE
Connector,receptacle,electrical
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
Cross-Reference Index
Part NumberManufacturer
2MP51 Oshkosh Defense Llc (USA)
2MP51 Oshkosh Corp (USA)
3087 Industrial Technologies and Services Llc (USA)
21612 PRIMARY Industrial Technologies and Services Llc (USA)
Related Parts
5977-00-038-1499INTERCHANGEABLE
BRUSH,ELECTRICAL CONTACT
5315-00-089-0107INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
21612
5930-00-332-0041INTERCHANGEABLE
SWITCH,ROTARY
G330105S1
2910-00-358-5057INTERCHANGEABLE
PUMP,FUEL,CAM ACTUATED
K02031
2805-00-423-3278INTERCHANGEABLE
INSERT,ENGINE VALVE SEAT
691583
4220-00-511-8299INTERCHANGEABLE
LIFE RAFT,INFLATABLE
5365-00-514-2501INTERCHANGEABLE
SHIM
6166350
4820-00-563-6316INTERCHANGEABLE
DISK,VALVE
216-12
2530-00-725-1668INTERCHANGEABLE
CYLINDER,HYDRAULIC BRAKE,WHEEL
308151C91
5935-00-752-2706INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
2127-0001-02
5950-01-068-5177INTERCHANGEABLE
COIL,RADIO FREQUENCY
240-0873-020
5905-01-099-4493INTERCHANGEABLE
RESISTOR
3087

Frequently Asked Questions

What is NSN 5310-00-687-7199?

NSN 5310-00-687-7199 is a Washer,lock, manufactured by Industrial Technologies and Services Llc, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-687-7199?

NSN 5310-00-687-7199 has 4 cross-referenced part numbers: 2MP51 (Oshkosh Defense Llc), 2MP51 (Oshkosh Corp), 3087 (Industrial Technologies and Services Llc), 21612 (Industrial Technologies and Services Llc).

What NSN replaces 5310-00-687-7199?

There are 12 known substitutes for 5310-00-687-7199: 5977-00-038-1499, 5315-00-089-0107, 5930-00-332-0041 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21612?

Key specifications for 21612: Hole Diameter: 0.382 INCHES MINIMUM AND 0.393 INCHES MAXIMUM IN; Surface Treatment: CADMIUM OVERALL; Style Designator: SPLIT HELICAL-RIGHT HAND; Material Thickness: 0.094 INCHES NOMINAL IN. 6 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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