PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

26558O-Ring

Charles Reed Knight Jr Dba Knight's Armament Company · NSN 5331-01-601-1650 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-601-1650 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-601-1650. Primary manufacturer part number: 26558.
Features
  • O-Ring — FSC 5331
  • 1 verified cross-reference
  • Primary manufacturer: Charles Reed Knight Jr Dba Knight's Armament Company
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-601-1650, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Charles Reed Knight Jr Dba Knight's Armament Company. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameO-Ring
FSC / FSG5331 — O-Ring (FSG 53)
ManufacturersCharles Reed Knight Jr Dba Knight's Armament Company (CAGE 1S002)
Technical Specifications
ParameterValue
NSN5331-01-601-1650
Primary Part Number26558
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerCharles Reed Knight Jr Dba Knight's Armament Company
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5306-00-144-3648 INTERCHANGEABLE
Bolt,machine
5331-00-411-8887021-8307 INTERCHANGEABLE
O-Ring
Parker Hannifin Corporation Div O-Ring Division
Cross-Reference Index
Part NumberManufacturer
26558 PRIMARY Charles Reed Knight Jr Dba Knight's Armament Company (USA)
Related Parts
5306-00-144-3648INTERCHANGEABLE
BOLT,MACHINE
5331-00-411-8887INTERCHANGEABLE
O-RING
021-8307

Frequently Asked Questions

What is NSN 5331-01-601-1650?

NSN 5331-01-601-1650 is a O-Ring, manufactured by Charles Reed Knight Jr Dba Knight's Armament Company, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-601-1650?

NSN 5331-01-601-1650 has 1 cross-referenced part number: 26558 (Charles Reed Knight Jr Dba Knight's Armament Company).

What NSN replaces 5331-01-601-1650?

There are 2 known substitutes for 5331-01-601-1650: 5306-00-144-3648, 5331-00-411-8887. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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