PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

P91C2Bearing Half,sleeve

Sterling Engine Co Inc · NSN 3120-00-416-8645 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-416-8645 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-416-8645. Primary manufacturer part number: P91C2.
Features
  • Bearing Half,sleeve — FSC 3120
  • Style Designator: HALF SLEEVE, EXTERNAL FLANGES BOTH ENDS
  • Left Flange Outside Diameter: 4.6250 INCHES MINIMUM AND 4.6300 INCHES MAXIMUM IN
  • Antirotation/lubrication Type and Quantity: 1 HOLE AND 1 SLOT
  • Body Outside Diameter: 4.0000 INCHES MINIMUM AND 4.0040 INCHES MAXIMUM IN
  • Slot Width: 0.1250 INCHES NOMINAL FIRST IN
  • Right Flange Outside Diameter: 4.6250 INCHES MINIMUM AND 4.6300 INCHES MAXIMUM IN
  • Hole Diameter: 0.3750 INCHES MINIMUM AND 0.3770 INCHES MAXIMUM FIRST IN
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
General Description

The Bearing Half,sleeve, cataloged under National Stock Number 3120-00-416-8645, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Sterling Engine Co Inc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN3120-00-416-8645
Primary Part NumberP91C2
Item NameBearing Half,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerSterling Engine Co Inc
StatusCANCELLED
Style DesignatorHALF SLEEVE, EXTERNAL FLANGES BOTH ENDS
Left Flange Outside Diameter4.6250 INCHES MINIMUM AND 4.6300 INCHES MAXIMUM IN
Antirotation/lubrication Type and Quantity1 HOLE AND 1 SLOT
Body Outside Diameter4.0000 INCHES MINIMUM AND 4.0040 INCHES MAXIMUM IN
Slot Width0.1250 INCHES NOMINAL FIRST IN
Right Flange Outside Diameter4.6250 INCHES MINIMUM AND 4.6300 INCHES MAXIMUM IN
Hole Diameter0.3750 INCHES MINIMUM AND 0.3770 INCHES MAXIMUM FIRST IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
4140-00-045-8117P91C2 INTERCHANGEABLE
Fan,circulating
Cardwell Condenser Corp Lapointe-Admiral Div
6240-00-270-4281F15T8B INTERCHANGEABLE
Lamp,fluorescent
Duro-Test Lighting
4130-00-714-3510 INTERCHANGEABLE
Compressor Unit,refrigeration
5365-01-176-3563572-510-9151 INTERCHANGEABLE
Plug,machine Thread,magnetic
Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix
4820-01-503-8736P9-1 INTERCHANGEABLE
Subplate Assembly,valve
Dynex/rivett Corp Power Units and Systems
6240-01-532-3744P91 INTERCHANGEABLE
Lamp,incandescent
Surefire, Llc Dba Surefire Llc
Cross-Reference Index
Part NumberManufacturer
NP13120PC3 Cooper Cameron Corp Ajax-Superior Div (USA)
P91C2 PRIMARY Sterling Engine Co Inc (USA)
18D27 Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc (USA)
P91 Cooper Cameron Corp Ajax-Superior Div (USA)
NP1076-1PCP91C Cooper Cameron Corp Ajax-Superior Div (USA)
NP7081PC1 Cooper Cameron Corp Ajax-Superior Div (USA)
NP10081PC1 Cooper Cameron Corp Ajax-Superior Div (USA)
NP7003PCP91C Cooper Cameron Corp Ajax-Superior Div (USA)
NP10003PCP91C Cooper Cameron Corp Ajax-Superior Div (USA)
NP1164PC1 Cooper Cameron Corp Ajax-Superior Div (USA)
NP1076PCP91 Cooper Cameron Corp Ajax-Superior Div (USA)
P91C Cooper Cameron Corp Ajax-Superior Div (USA)
PC13110PC36 Cooper Cameron Corp Ajax-Superior Div (USA)
NP1005PC5 Cooper Cameron Corp Ajax-Superior Div (USA)
P91C2 Cooper Cameron Corp Ajax-Superior Div (USA)
Related Parts
4140-00-045-8117INTERCHANGEABLE
FAN,CIRCULATING
P91C2
6240-00-270-4281INTERCHANGEABLE
LAMP,FLUORESCENT
F15T8B
4130-00-714-3510INTERCHANGEABLE
COMPRESSOR UNIT,REFRIGERATION
5365-01-176-3563INTERCHANGEABLE
PLUG,MACHINE THREAD,MAGNETIC
572-510-9151
4820-01-503-8736INTERCHANGEABLE
SUBPLATE ASSEMBLY,VALVE
P9-1
6240-01-532-3744INTERCHANGEABLE
LAMP,INCANDESCENT
P91

Frequently Asked Questions

What is NSN 3120-00-416-8645?

NSN 3120-00-416-8645 is a Bearing Half,sleeve, manufactured by Sterling Engine Co Inc, classified under FSC 3120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3120-00-416-8645?

NSN 3120-00-416-8645 has 15 cross-referenced part numbers: NP13120PC3 (Cooper Cameron Corp Ajax-Superior Div), P91C2 (Sterling Engine Co Inc), 18D27 (Mechanical Equipment Company, Inc. Dba Mechanical Equipment Co Inc), P91 (Cooper Cameron Corp Ajax-Superior Div), NP1076-1PCP91C (Cooper Cameron Corp Ajax-Superior Div) and 10 more.

What NSN replaces 3120-00-416-8645?

There are 6 known substitutes for 3120-00-416-8645: 4140-00-045-8117, 6240-00-270-4281, 4130-00-714-3510 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of P91C2?

Key specifications for P91C2: Style Designator: HALF SLEEVE, EXTERNAL FLANGES BOTH ENDS; Left Flange Outside Diameter: 4.6250 INCHES MINIMUM AND 4.6300 INCHES MAXIMUM IN; Antirotation/lubrication Type and Quantity: 1 HOLE AND 1 SLOT; Body Outside Diameter: 4.0000 INCHES MINIMUM AND 4.0040 INCHES MAXIMUM IN. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3120-00-416-8645 still in active supply?

NSN 3120-00-416-8645 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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