PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5266118Post,special

Naval Sea Systems Command · NSN 5342-01-297-1820 · FSC 5342 · Mount,resilient,weapon System
Verified by PartsTable
NSN 5342-01-297-1820 — this item is cataloged by the U.S. Government under National Stock Number 5342-01-297-1820. Primary manufacturer part number: 5266118.
Features
  • Post,special — FSC 5342
  • General Characteristics Item Description: STEEL,QQ-S-763,CLASS 304,COND A; 3.728 IN. LG; 0.218 IN. HOLE DIA FOUR PLACES ON ONE END MOUNTING FLANGE AND 0.375-16 UNC-2B BY 0.900 IN. DEEP THREADED HOLE,COUNTERBORED 0.625 IN. DIA BY 0.120 IN. DEEP SECOND FLANGE END; ITEM IS CANTED IN
  • 2 verified cross-references
  • Primary manufacturer: Naval Sea Systems Command
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Post,special, cataloged under National Stock Number 5342-01-297-1820, is classified within Federal Supply Class 5342 (Mount,resilient,weapon System) of the Hardware and Abrasives group. The primary manufacturer of record is Naval Sea Systems Command. Government technical data includes 1 verified specification, 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5342-01-297-1820
Primary Part Number5266118
Item NamePost,special
FSC / FSG5342 / 53 — Mount,resilient,weapon System
ManufacturerNaval Sea Systems Command
StatusACTIVE
General Characteristics Item DescriptionSTEEL,QQ-S-763,CLASS 304,COND A; 3.728 IN. LG; 0.218 IN. HOLE DIA FOUR PLACES ON ONE END MOUNTING FLANGE AND 0.375-16 UNC-2B BY 0.900 IN. DEEP THREADED HOLE,COUNTERBORED 0.625 IN. DIA BY 0.120 IN. DEEP SECOND FLANGE END; ITEM IS CANTED IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5310-00-285-5149303407 INTERCHANGEABLE
Washer,flat
Chrysler Realty Company Llc Dba Daimler Chrysler
Cross-Reference Index
Part NumberManufacturer
5266118 PRIMARY Naval Sea Systems Command (USA)
5266118 Raytheon Company Dba Raytheon Co (USA)
Related Parts
5310-00-285-5149INTERCHANGEABLE
WASHER,FLAT
303407

Frequently Asked Questions

What is NSN 5342-01-297-1820?

NSN 5342-01-297-1820 is a Post,special, manufactured by Naval Sea Systems Command, classified under FSC 5342 (Mount,resilient,weapon System). Status: active.

What are the part numbers for NSN 5342-01-297-1820?

NSN 5342-01-297-1820 has 2 cross-referenced part numbers: 5266118 (Naval Sea Systems Command), 5266118 (Raytheon Company Dba Raytheon Co).

What NSN replaces 5342-01-297-1820?

There is 1 known substitute for 5342-01-297-1820: 5310-00-285-5149. Verify interchangeability with system specifications before substitution.

What are the specifications of 5266118?

Key specifications for 5266118: General Characteristics Item Description: STEEL,QQ-S-763,CLASS 304,COND A; 3.728 IN. LG; 0.218 IN. HOLE DIA FOUR PLACES ON ONE END MOUNTING FLANGE AND 0.375-16 UNC-2B BY 0.900 IN. DEEP THREADED HOLE,COUNTERBORED 0.625 IN. DIA BY 0.120 IN. DEEP SECOND FLANGE END; ITEM IS CANTED IN. 1 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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