PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21051Washer,lock

Trevose Industrial Products Inc · NSN 5310-00-434-7225 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-434-7225 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-434-7225. Primary manufacturer part number: 21051.
Features
  • Washer,lock — FSC 5310
  • Surface Treatment: CADMIUM OVERALL
  • Hole Diameter: 0.319 INCHES NOMINAL IN
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Material Thickness: 0.076 INCHES NOMINAL IN
  • Outside Diameter: 0.570 INCHES NOMINAL IN
  • Material: STEEL OVERALL
  • 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 5310-00-434-7225, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Trevose Industrial Products Inc. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 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
NSN5310-00-434-7225
Primary Part Number21051
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerTrevose Industrial Products Inc
StatusCANCELLED
Surface TreatmentCADMIUM OVERALL
Hole Diameter0.319 INCHES NOMINAL IN
Style DesignatorSPLIT HELICAL-RIGHT HAND
Material Thickness0.076 INCHES NOMINAL IN
Outside Diameter0.570 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5310-00-010-3320 INTERCHANGEABLE
Washer,lock
5895-00-027-6780 INTERCHANGEABLE
Amplifier-Power Supply
3110-00-100-0329572 INTERCHANGEABLE
Cup,tapered Roller Bearing
The Timken Corporation
3110-00-227-3253MS51961-30 INTERCHANGEABLE
Bearing,roller,needle
American Society for Testing and Materials Dba Astm International
5950-00-252-2562K7890666P1 INTERCHANGEABLE
Coil,radio Frequency
General Electric Company
5935-00-402-11533180-2242-00 INTERCHANGEABLE
Adapter,connector
Tyco Electronics Corp
5310-00-407-956612759-00080 INTERCHANGEABLE
Washer,lock
Fastenal Company Dba Fastenal Co
5330-00-641-651821051 INTERCHANGEABLE
Gasket
Sealcraft Corporation
3110-00-799-49036700213 INTERCHANGEABLE
Roller,bearing
General Motors Corp
5905-00-853-48638192923 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Us Army Aviation and Missile Command
Cross-Reference Index
Part NumberManufacturer
103320 Dresser Industries Inc Waukesha Engine Div (USA)
21051 Dresser Industries Inc Waukesha Engine Div (USA)
CD0296 Dresser Industries Inc Waukesha Engine Div (USA)
21051 PRIMARY Trevose Industrial Products Inc (USA)
Related Parts
5310-00-010-3320INTERCHANGEABLE
WASHER,LOCK
5895-00-027-6780INTERCHANGEABLE
AMPLIFIER-POWER SUPPLY
3110-00-100-0329INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
572
3110-00-227-3253INTERCHANGEABLE
BEARING,ROLLER,NEEDLE
MS51961-30
5950-00-252-2562INTERCHANGEABLE
COIL,RADIO FREQUENCY
K7890666P1
5935-00-402-1153INTERCHANGEABLE
ADAPTER,CONNECTOR
3180-2242-00
5310-00-407-9566INTERCHANGEABLE
WASHER,LOCK
12759-00080
5330-00-641-6518INTERCHANGEABLE
GASKET
21051
3110-00-799-4903INTERCHANGEABLE
ROLLER,BEARING
6700213
5905-00-853-4863INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
8192923
6680-00-882-7041INTERCHANGEABLE
INDICATOR,LIQUID QUANTITY
4460-00-920-3449INTERCHANGEABLE
COLLECTOR,DUST
103320

Frequently Asked Questions

What is NSN 5310-00-434-7225?

NSN 5310-00-434-7225 is a Washer,lock, manufactured by Trevose Industrial Products Inc, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-434-7225?

NSN 5310-00-434-7225 has 4 cross-referenced part numbers: 103320 (Dresser Industries Inc Waukesha Engine Div), 21051 (Dresser Industries Inc Waukesha Engine Div), CD0296 (Dresser Industries Inc Waukesha Engine Div), 21051 (Trevose Industrial Products Inc).

What NSN replaces 5310-00-434-7225?

There are 12 known substitutes for 5310-00-434-7225: 5310-00-010-3320, 5895-00-027-6780, 3110-00-100-0329 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21051?

Key specifications for 21051: Surface Treatment: CADMIUM OVERALL; Hole Diameter: 0.319 INCHES NOMINAL IN; Style Designator: SPLIT HELICAL-RIGHT HAND; Material Thickness: 0.076 INCHES NOMINAL IN. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-434-7225 still in active supply?

NSN 5310-00-434-7225 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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