PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A3866Z520Retainer Assembly,bearing

Meritor Industrial Products, Llc · NSN 2520-00-752-1703 · FSC 2520 · No Item Name Available
Verified by PartsTable
NSN 2520-00-752-1703 — this item is cataloged by the U.S. Government under National Stock Number 2520-00-752-1703. Primary manufacturer part number: A3866Z520.
Features
  • Retainer Assembly,bearing — FSC 2520
  • General Characteristics Item Description: STEEL RETAINER,PLAIN ENCASED OIL SEAL; 3.345 IN. BORE DIA. 6.500 IN. O/A HGT;5.900 IN. O/A WIDTH; 1.750 IN. LG; SIX PLAIN MTG HOLES,0.531 IN. DIA; SPACED 60 DEGS APART ON A 5.375 IN. CIRCLE; DESIGNED TO ACCOMMODATE A 2.375 IN. DIA SHAFT IN
  • 8 verified cross-references
  • Primary manufacturer: Meritor Industrial Products, Llc
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
General Description

The Retainer Assembly,bearing, cataloged under National Stock Number 2520-00-752-1703, is classified within Federal Supply Class 2520 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Meritor Industrial Products, Llc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2520-00-752-1703
Primary Part NumberA3866Z520
Item NameRetainer Assembly,bearing
FSC / FSG2520 / 25 — No Item Name Available
ManufacturerMeritor Industrial Products, Llc
StatusACTIVE
General Characteristics Item DescriptionSTEEL RETAINER,PLAIN ENCASED OIL SEAL; 3.345 IN. BORE DIA. 6.500 IN. O/A HGT;5.900 IN. O/A WIDTH; 1.750 IN. LG; SIX PLAIN MTG HOLES,0.531 IN. DIA; SPACED 60 DEGS APART ON A 5.375 IN. CIRCLE; DESIGNED TO ACCOMMODATE A 2.375 IN. DIA SHAFT IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
3110-00-156-8230 INTERCHANGEABLE
Bearing,ball,annular
4820-00-168-8744BB57S4901ALT,DPC219 INTERCHANGEABLE
Valve,globe
Naval Ship Systems Command
3110-00-215-030330219 INTERCHANGEABLE
Bearing,roller,tapered
The Timken Corporation
4730-01-256-900030-219-16H INTERCHANGEABLE
Adapter,straight,flange to Tube
Bell Textron Inc
4820-01-419-693130219 INTERCHANGEABLE
Seat,valve
Triumph Actuation Systems - Valencia, Inc. Dba Triumph Actuation Systems - Valencia Inc Div Triumph Actuation Systems-Val
5120-01-565-187030219 INTERCHANGEABLE
Screwdriver,flat Tip
Wiha Quality Tools
3130-01-649-541030219 INTERCHANGEABLE
Housing,bearing Unit
Generac Mobile Products, Llc
5975-01-671-107030219 INTERCHANGEABLE
Junction Box
Mulberry Metal Products Inc
Cross-Reference Index
Part NumberManufacturer
A3866Z520 PRIMARY Meritor Industrial Products, Llc (USA)
7521703 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
30219 Napco International Llc Dba Napco International Inc (USA)
A3866Z520 Meritor Heavy Vehicle Systems, Llc (USA)
2676D5 Diamond Reo Truck Co (USA)
2520007521703 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
913831 Sasco Inc Canadian Div
2530007521703 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
Related Parts
3110-00-156-8230INTERCHANGEABLE
BEARING,BALL,ANNULAR
4820-00-168-8744INTERCHANGEABLE
VALVE,GLOBE
BB57S4901ALT,DPC219
3110-00-215-0303INTERCHANGEABLE
BEARING,ROLLER,TAPERED
30219
4730-01-256-9000INTERCHANGEABLE
ADAPTER,STRAIGHT,FLANGE TO TUBE
30-219-16H
4820-01-419-6931INTERCHANGEABLE
SEAT,VALVE
30219
5120-01-565-1870INTERCHANGEABLE
SCREWDRIVER,FLAT TIP
30219
3130-01-649-5410INTERCHANGEABLE
HOUSING,BEARING UNIT
30219
5975-01-671-1070INTERCHANGEABLE
JUNCTION BOX
30219

Frequently Asked Questions

What is NSN 2520-00-752-1703?

NSN 2520-00-752-1703 is a Retainer Assembly,bearing, manufactured by Meritor Industrial Products, Llc, classified under FSC 2520 (No Item Name Available). Status: active.

What are the part numbers for NSN 2520-00-752-1703?

NSN 2520-00-752-1703 has 8 cross-referenced part numbers: A3866Z520 (Meritor Industrial Products, Llc), 7521703 (U S Army Tank Automotive Command Amsta-Im-Mm), 30219 (Napco International Llc Dba Napco International Inc), A3866Z520 (Meritor Heavy Vehicle Systems, Llc), 2676D5 (Diamond Reo Truck Co) and 3 more.

What NSN replaces 2520-00-752-1703?

There are 8 known substitutes for 2520-00-752-1703: 3110-00-156-8230, 4820-00-168-8744, 3110-00-215-0303 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A3866Z520?

Key specifications for A3866Z520: General Characteristics Item Description: STEEL RETAINER,PLAIN ENCASED OIL SEAL; 3.345 IN. BORE DIA. 6.500 IN. O/A HGT;5.900 IN. O/A WIDTH; 1.750 IN. LG; SIX PLAIN MTG HOLES,0.531 IN. DIA; SPACED 60 DEGS APART ON A 5.375 IN. CIRCLE; DESIGNED TO ACCOMMODATE A 2.375 IN. DIA SHAFT IN. 1 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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