PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

502121Spacer,ring

Sihi Pumps, Inc. · NSN 5365-01-339-8401 · FSC 5365 · No Item Name Available
Verified by PartsTable
NSN 5365-01-339-8401 — this item is cataloged by the U.S. Government under National Stock Number 5365-01-339-8401. Primary manufacturer part number: 502121.
Features
  • Spacer,ring — FSC 5365
  • 3 verified cross-references
  • Primary manufacturer: Sihi Pumps, Inc.
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Spacer,ring, cataloged under National Stock Number 5365-01-339-8401, is classified within Federal Supply Class 5365 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Sihi Pumps, Inc.. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameSpacer,ring
FSC / FSG5365 — No Item Name Available (FSG 53)
ManufacturersSihi Pumps, Inc. (CAGE 58874); Sihi Pumps Ltd (CAGE 37027)
Technical Specifications
ParameterValue
NSN5365-01-339-8401
Primary Part Number502121
Item NameSpacer,ring
FSC / FSG5365 / 53 — No Item Name Available
ManufacturerSihi Pumps, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
4330-00-698-402550158 INTERCHANGEABLE
Filter Element,fluid
Arvinmeritor Inc
4935-01-110-808050212-1 INTERCHANGEABLE
Element
Raytheon Company Dba Raytheon
5985-01-271-122050212-1 INTERCHANGEABLE
Antenna Subassembly
Fisica Applied Technologies, Inc. Div Randtron Antenna Systems
6220-01-417-3323502121 INTERCHANGEABLE
Panel,indicating,light Transmitt
Airco Industries, Inc. Dba Photo Etch Div Photo Etch
3010-01-520-5248 INTERCHANGEABLE
Coupling,shaft,rigid
Cross-Reference Index
Part NumberManufacturer
502121 PRIMARY Sihi Pumps, Inc. (USA)
400.9130.025.00 Sihi Pumps, Inc. (USA)
400.9130.025.00 Sihi Pumps Ltd (CAN)
Related Parts
4330-00-698-4025INTERCHANGEABLE
FILTER ELEMENT,FLUID
50158
4935-01-110-8080INTERCHANGEABLE
ELEMENT
50212-1
5985-01-271-1220INTERCHANGEABLE
ANTENNA SUBASSEMBLY
50212-1
6220-01-417-3323INTERCHANGEABLE
PANEL,INDICATING,LIGHT TRANSMITT
502121
3010-01-520-5248INTERCHANGEABLE
COUPLING,SHAFT,RIGID

Frequently Asked Questions

What is NSN 5365-01-339-8401?

NSN 5365-01-339-8401 is a Spacer,ring, manufactured by Sihi Pumps, Inc., classified under FSC 5365 (No Item Name Available). Status: active.

What are the part numbers for NSN 5365-01-339-8401?

NSN 5365-01-339-8401 has 3 cross-referenced part numbers: 502121 (Sihi Pumps, Inc.), 400.9130.025.00 (Sihi Pumps, Inc.), 400.9130.025.00 (Sihi Pumps Ltd).

What NSN replaces 5365-01-339-8401?

There are 5 known substitutes for 5365-01-339-8401: 4330-00-698-4025, 4935-01-110-8080, 5985-01-271-1220 and 2 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com