PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

389999PC271Cap,main Bearing

Naval Ship Systems Command · NSN 4310-00-468-0031 · FSC 4310 · No Item Name Available
Verified by PartsTable
NSN 4310-00-468-0031 — this item is cataloged by the U.S. Government under National Stock Number 4310-00-468-0031. Primary manufacturer part number: 389999PC271.
Features
  • Cap,main Bearing — FSC 4310
  • 3 verified cross-references
  • Primary manufacturer: Naval Ship Systems Command
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
General Description

The Cap,main Bearing, cataloged under National Stock Number 4310-00-468-0031, is classified within Federal Supply Class 4310 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Naval Ship Systems Command. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameCap,main Bearing
FSC / FSG4310 — No Item Name Available (FSG 43)
ManufacturersNaval Ship Systems Command (CAGE 80064); Hardie-Tynes Co., Inc. (CAGE 27235)
Technical Specifications
ParameterValue
NSN4310-00-468-0031
Primary Part Number389999PC271
Item NameCap,main Bearing
FSC / FSG4310 / 43 — No Item Name Available
ManufacturerNaval Ship Systems Command
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5940-00-143-466310-301-1-05 INTERCHANGEABLE
Terminal,stud
Concord Electronics, Inc.
5310-00-274-987020-271 INTERCHANGEABLE
Washer,flat
Dresser Industries Inc Leroi Div
4720-00-790-668520271 INTERCHANGEABLE
Hose,preformed
Gates Corporation
5962-01-171-0986MM54C901J INTERCHANGEABLE
Microcircuit,digital
National Semiconductor Corporation
4820-01-182-078120271HS41M INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
6220-01-196-954813450-1 INTERCHANGEABLE
Yoke,mounting
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
5325-01-270-835920271 INTERCHANGEABLE
Ring,retaining
Kone Inc.
3020-01-274-4912 INTERCHANGEABLE
Pulley,groove
6515-01-463-4233 INTERCHANGEABLE
Drainage Unit,pleural Cavity
6350-01-695-152620271 INTERCHANGEABLE
Alarm,smoke,automatic
Aqualarm Inc
Cross-Reference Index
Part NumberManufacturer
389999PC271 Naval Ship Systems Command (USA)
S150-404GPC271 Hardie-Tynes Co., Inc. (USA)
20-271 Hardie-Tynes Co., Inc. (USA)
Related Parts
5940-00-143-4663INTERCHANGEABLE
TERMINAL,STUD
10-301-1-05
5310-00-274-9870INTERCHANGEABLE
WASHER,FLAT
20-271
4720-00-790-6685INTERCHANGEABLE
HOSE,PREFORMED
20271
5962-01-171-0986INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
MM54C901J
4820-01-182-0781INTERCHANGEABLE
VALVE,SAFETY RELIEF
20271HS41M
6220-01-196-9548INTERCHANGEABLE
YOKE,MOUNTING
13450-1
5325-01-270-8359INTERCHANGEABLE
RING,RETAINING
20271
3020-01-274-4912INTERCHANGEABLE
PULLEY,GROOVE
6515-01-463-4233INTERCHANGEABLE
DRAINAGE UNIT,PLEURAL CAVITY
6350-01-695-1526INTERCHANGEABLE
ALARM,SMOKE,AUTOMATIC
20271

Frequently Asked Questions

What is NSN 4310-00-468-0031?

NSN 4310-00-468-0031 is a Cap,main Bearing, manufactured by Naval Ship Systems Command, classified under FSC 4310 (No Item Name Available). Status: active.

What are the part numbers for NSN 4310-00-468-0031?

NSN 4310-00-468-0031 has 3 cross-referenced part numbers: 389999PC271 (Naval Ship Systems Command), S150-404GPC271 (Hardie-Tynes Co., Inc.), 20-271 (Hardie-Tynes Co., Inc.).

What NSN replaces 4310-00-468-0031?

There are 10 known substitutes for 4310-00-468-0031: 5940-00-143-4663, 5310-00-274-9870, 4720-00-790-6685 and 7 more. Verify interchangeability with system specifications before substitution.

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