PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

HSP4-157Bearing,plain,self-Aligning

U S Bearings · NSN 3120-01-122-3070 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-01-122-3070 — this item is cataloged by the U.S. Government under National Stock Number 3120-01-122-3070. Primary manufacturer part number: HSP4-157.
Features
  • Bearing,plain,self-Aligning — FSC 3120
  • 3 verified cross-references
  • Primary manufacturer: U S Bearings
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
General Description

The Bearing,plain,self-Aligning, cataloged under National Stock Number 3120-01-122-3070, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is U S Bearings. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameBearing,plain,self-Aligning
FSC / FSG3120 — No Item Name Available (FSG 31)
ManufacturersU S Bearings (CAGE 02758); Sargent Aerospace & Defense, Llc Dba Kahr Bearings (CAGE 97613)
Technical Specifications
ParameterValue
NSN3120-01-122-3070
Primary Part NumberHSP4-157
Item NameBearing,plain,self-Aligning
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerU S Bearings
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
3110-00-042-4807MS27645-4A INTERCHANGEABLE
Bearing,ball,airframe
Sae International Dba Sae International
3110-00-142-4314 INTERCHANGEABLE
Bearing,ball,airframe
3110-01-144-3960KS4AC1 INTERCHANGEABLE
Bearing,ball,airframe
Rbc Aircraft Products, Inc.
Cross-Reference Index
Part NumberManufacturer
HSP4-157 PRIMARY U S Bearings (USA)
KS4 Sargent Aerospace & Defense, Llc Dba Kahr Bearings (USA)
KS4A Sargent Aerospace & Defense, Llc Dba Kahr Bearings (USA)
Related Parts
3110-00-042-4807INTERCHANGEABLE
BEARING,BALL,AIRFRAME
MS27645-4A
3110-00-142-4314INTERCHANGEABLE
BEARING,BALL,AIRFRAME
3110-01-144-3960INTERCHANGEABLE
BEARING,BALL,AIRFRAME
KS4AC1

Frequently Asked Questions

What is NSN 3120-01-122-3070?

NSN 3120-01-122-3070 is a Bearing,plain,self-Aligning, manufactured by U S Bearings, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-01-122-3070?

NSN 3120-01-122-3070 has 3 cross-referenced part numbers: HSP4-157 (U S Bearings), KS4 (Sargent Aerospace & Defense, Llc Dba Kahr Bearings), KS4A (Sargent Aerospace & Defense, Llc Dba Kahr Bearings).

What NSN replaces 3120-01-122-3070?

There are 3 known substitutes for 3120-01-122-3070: 3110-00-042-4807, 3110-00-142-4314, 3110-01-144-3960. Verify interchangeability with system specifications before substitution.

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