PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

661-5B/PC.6Retainer,ring,valve

Flowserve Corporation Div Flowserve Us Inc · NSN 5365-01-231-2868 · FSC 5365 · No Item Name Available
Verified by PartsTable
NSN 5365-01-231-2868 — this item is cataloged by the U.S. Government under National Stock Number 5365-01-231-2868. Primary manufacturer part number: 661-5B/PC.6.
Features
  • Retainer,ring,valve — FSC 5365
  • Criticality Code Justification: ZZZY
  • Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
  • 2 verified cross-references
  • Primary manufacturer: Flowserve Corporation Div Flowserve Us Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Retainer,ring,valve, cataloged under National Stock Number 5365-01-231-2868, is classified within Federal Supply Class 5365 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Flowserve Corporation Div Flowserve Us Inc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references 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.

Technical Specifications
ParameterValue
NSN5365-01-231-2868
Primary Part Number661-5B/PC.6
Item NameRetainer,ring,valve
FSC / FSG5365 / 53 — No Item Name Available
ManufacturerFlowserve Corporation Div Flowserve Us Inc
StatusACTIVE
Criticality Code JustificationZZZY
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5120-00-243-2797 INTERCHANGEABLE
Hoe,mortar
5120-01-398-7950 INTERCHANGEABLE
Screwdriver,cross Tip
Cross-Reference Index
Part NumberManufacturer
661-5B/PC.6 Flowserve Corporation Div Flowserve Us Inc (USA)
661-5-6 Flowserve Corporation Div Flowserve Us Inc (USA)
Related Parts
5120-00-243-2797INTERCHANGEABLE
HOE,MORTAR
5120-01-398-7950INTERCHANGEABLE
SCREWDRIVER,CROSS TIP

Frequently Asked Questions

What is NSN 5365-01-231-2868?

NSN 5365-01-231-2868 is a Retainer,ring,valve, manufactured by Flowserve Corporation Div Flowserve Us Inc, classified under FSC 5365 (No Item Name Available). Status: active.

What are the part numbers for NSN 5365-01-231-2868?

NSN 5365-01-231-2868 has 2 cross-referenced part numbers: 661-5B/PC.6 (Flowserve Corporation Div Flowserve Us Inc), 661-5-6 (Flowserve Corporation Div Flowserve Us Inc).

What NSN replaces 5365-01-231-2868?

There are 2 known substitutes for 5365-01-231-2868: 5120-00-243-2797, 5120-01-398-7950. Verify interchangeability with system specifications before substitution.

What are the specifications of 661-5B/PC.6?

Key specifications for 661-5B/PC.6: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS. 2 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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