PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40004Ball Assy,tow

Curt Manufacturing, Llc Div Curt · NSN 2540-01-663-4891 · FSC 2540 · No Item Name Available
Verified by PartsTable
NSN 2540-01-663-4891 — this item is cataloged by the U.S. Government under National Stock Number 2540-01-663-4891. Primary manufacturer part number: 40004.
Features
  • Ball Assy,tow — FSC 2540
  • Overall Diameter: 2.00 INCHES NOMINAL IN
  • Surface Treatment: CHROMIUM
  • Supplementary Features: SHANK DIAMETER 1 INCH; SHANK LENGTH 2 1/8 INCH; BALL CAPACITY 6000 LBS.;TORQUE 250 FT LBS LBS
  • Material: STEEL
  • 1 verified cross-reference
  • Primary manufacturer: Curt Manufacturing, Llc Div Curt
Applications
  • Applications requiring Steel construction
General Description

The Ball Assy,tow, cataloged under National Stock Number 2540-01-663-4891, is classified within Federal Supply Class 2540 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Curt Manufacturing, Llc Div Curt. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN2540-01-663-4891
Primary Part Number40004
Item NameBall Assy,tow
FSC / FSG2540 / 25 — No Item Name Available
ManufacturerCurt Manufacturing, Llc Div Curt
StatusACTIVE
Overall Diameter2.00 INCHES NOMINAL IN
Surface TreatmentCHROMIUM
Supplementary FeaturesSHANK DIAMETER 1 INCH; SHANK LENGTH 2 1/8 INCH; BALL CAPACITY 6000 LBS.;TORQUE 250 FT LBS LBS
MaterialSTEEL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 10
4730-00-068-65555600-8-10S INTERCHANGEABLE
Coupling Assembly,quick Disconne
Danfoss Power Solutions II, Llc
5330-01-011-8535 INTERCHANGEABLE
Seal Kit,valve
5330-01-054-4006JC-400-525-20 INTERCHANGEABLE
Seal,plain Encased
John Crane, Inc
5998-01-064-0430DA63323 INTERCHANGEABLE
Circuit Card Assembly
O T S I
5895-01-365-51784004-4 INTERCHANGEABLE
Panel,patching,communication
Motorola/codex Corp Sub of Motorola Inc
6530-01-395-118440004 INTERCHANGEABLE
Dispenser,skin Cream,hospital Pa
Advanced Chemical Technology Inc
8465-01-541-829440004 INTERCHANGEABLE
Hydration System
Camelbak Products, Llc Dba Camelbak
4940-01-597-056540004 INTERCHANGEABLE
Purging System,dry Nitrogen
Uniweld Products, Inc. Dba Uniweld Products Inc
5310-01-653-77804-0234 INTERCHANGEABLE
Washer,flat
Namjet Llc
5120-01-669-154740004 INTERCHANGEABLE
Wrench,box and Open End,combinat
Wiha Quality Tools
Cross-Reference Index
Part NumberManufacturer
40004 PRIMARY Curt Manufacturing, Llc Div Curt (USA)
Related Parts
4730-00-068-6555INTERCHANGEABLE
COUPLING ASSEMBLY,QUICK DISCONNE
5600-8-10S
5330-01-011-8535INTERCHANGEABLE
SEAL KIT,VALVE
5330-01-054-4006INTERCHANGEABLE
SEAL,PLAIN ENCASED
JC-400-525-20
5998-01-064-0430INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
DA63323
5895-01-365-5178INTERCHANGEABLE
PANEL,PATCHING,COMMUNICATION
4004-4
6530-01-395-1184INTERCHANGEABLE
DISPENSER,SKIN CREAM,HOSPITAL PA
40004
8465-01-541-8294INTERCHANGEABLE
HYDRATION SYSTEM
40004
4940-01-597-0565INTERCHANGEABLE
PURGING SYSTEM,DRY NITROGEN
40004
5310-01-653-7780INTERCHANGEABLE
WASHER,FLAT
4-0234
5120-01-669-1547INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT
40004

Frequently Asked Questions

What is NSN 2540-01-663-4891?

NSN 2540-01-663-4891 is a Ball Assy,tow, manufactured by Curt Manufacturing, Llc Div Curt, classified under FSC 2540 (No Item Name Available). Status: active.

What are the part numbers for NSN 2540-01-663-4891?

NSN 2540-01-663-4891 has 1 cross-referenced part number: 40004 (Curt Manufacturing, Llc Div Curt).

What NSN replaces 2540-01-663-4891?

There are 10 known substitutes for 2540-01-663-4891: 4730-00-068-6555, 5330-01-011-8535, 5330-01-054-4006 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40004?

Key specifications for 40004: Overall Diameter: 2.00 INCHES NOMINAL IN; Surface Treatment: CHROMIUM; Supplementary Features: SHANK DIAMETER 1 INCH; SHANK LENGTH 2 1/8 INCH; BALL CAPACITY 6000 LBS.;TORQUE 250 FT LBS LBS; End Item Identification: SPIDER. 5 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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