PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2151100078Washer,lock

Navcom Defense Electronics, Inc. · NSN 5310-00-209-5311 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-209-5311 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-209-5311. Primary manufacturer part number: 2151100078.
Features
  • Washer,lock — FSC 5310
  • Style Designator: SPLIT HELICAL-RIGHT HAND
  • Material Document and Classification: FED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 MIL STD SINGLE MATERIAL RESPONSE OVERALL
  • Surface Treatment Document and Classification: QQ-P-416,OR QQ-Z-325 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Nondefinitive Spec/std Data: 2 STYLE AND A CLASS
  • Surface Treatment: CADMIUM OR ZINC OVERALL
  • Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
  • Material Thickness: 0.025 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
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 5310-00-209-5311, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Navcom Defense Electronics, Inc.. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-209-5311
Primary Part Number2151100078
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNavcom Defense Electronics, Inc.
StatusCANCELLED
Style DesignatorSPLIT HELICAL-RIGHT HAND
Material Document and ClassificationFED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 MIL STD SINGLE MATERIAL RESPONSE OVERALL
Surface Treatment Document and ClassificationQQ-P-416,OR QQ-Z-325 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Nondefinitive Spec/std Data2 STYLE AND A CLASS
Surface TreatmentCADMIUM OR ZINC OVERALL
Hardness Rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
Material Thickness0.025 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
MaterialSTEEL OVERALL
Hole Diameter0.115 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN
Outside Diameter0.209 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
5310-00-543-2410MS35338-40 INTERCHANGEABLE
Washer,lock
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
2151100078 Navcom Defense Electronics, Inc. (USA)
B5202B Trailmobile Inc Sub of the Pullman Co (USA)
852788 Us Army Aviation and Missile Command (USA)
MS35338-21 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5310-00-543-2410INTERCHANGEABLE
WASHER,LOCK
MS35338-40

Frequently Asked Questions

What is NSN 5310-00-209-5311?

NSN 5310-00-209-5311 is a Washer,lock, manufactured by Navcom Defense Electronics, Inc., classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-209-5311?

NSN 5310-00-209-5311 has 4 cross-referenced part numbers: 2151100078 (Navcom Defense Electronics, Inc.), B5202B (Trailmobile Inc Sub of the Pullman Co), 852788 (Us Army Aviation and Missile Command), MS35338-21 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5310-00-209-5311?

There is 1 known substitute for 5310-00-209-5311: 5310-00-543-2410. Verify interchangeability with system specifications before substitution.

What are the specifications of 2151100078?

Key specifications for 2151100078: Style Designator: SPLIT HELICAL-RIGHT HAND; Material Document and Classification: FED STD 66,AISI C1060 THRU C1080 OR SAE 1060 THRU 1080 MIL STD SINGLE MATERIAL RESPONSE OVERALL; Surface Treatment Document and Classification: QQ-P-416,OR QQ-Z-325 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Nondefinitive Spec/std Data: 2 STYLE AND A CLASS. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-209-5311 still in active supply?

NSN 5310-00-209-5311 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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