PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1564Block,tackle

Harken Inc · NSN 3940-01-504-3464 · FSC 3940 · No Item Name Available
Verified by PartsTable
NSN 3940-01-504-3464 — this item is cataloged by the U.S. Government under National Stock Number 3940-01-504-3464. Primary manufacturer part number: 1564.
Features
  • Block,tackle — FSC 3940
  • Material: ALUMINUM SHEAVE
  • Bearing Type: BALL
  • Load Rating: 1800.0 POUNDS MAXIMUM LBS
  • Shell Length: 9.500 INCHES NOMINAL IN
  • Second Sheave Outside Diameter: 2.000 INCHES NOMINAL IN
  • Sheave Quantity: 2
  • Sheave Outside Diameter: 3.000 INCHES NOMINAL IN
Applications
  • Applications requiring Aluminum Sheave construction
General Description

The Block,tackle, cataloged under National Stock Number 3940-01-504-3464, is classified within Federal Supply Class 3940 (No Item Name Available) of the Materials Handling Equipment group. The primary manufacturer of record is Harken Inc. Government technical data includes 8 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3940-01-504-3464
Primary Part Number1564
Item NameBlock,tackle
FSC / FSG3940 / 39 — No Item Name Available
ManufacturerHarken Inc
StatusACTIVE
MaterialALUMINUM SHEAVE
Bearing TypeBALL
Load Rating1800.0 POUNDS MAXIMUM LBS
Shell Length9.500 INCHES NOMINAL IN
Second Sheave Outside Diameter2.000 INCHES NOMINAL IN
Sheave Quantity2
Sheave Outside Diameter3.000 INCHES NOMINAL IN
Center Pin Diameter0.312 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5910-00-081-06331564 INTERCHANGEABLE
Capacitor,fixed,plastic Dielectr
Bell Industries Inc Electronic Distributor Div
5360-00-414-20841564 INTERCHANGEABLE
Spring,helical,compression
Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.
4720-00-541-9281 INTERCHANGEABLE
Hose,nonmetallic
5940-00-644-79481564 INTERCHANGEABLE
Terminal,lug
Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron
5905-00-830-9024 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
5310-00-843-34963277-001 INTERCHANGEABLE
Washer,flat
Rg Industries Inc Div Rg Group
5305-00-924-1298 INTERCHANGEABLE
Screw,machine
5905-00-929-30692100-0942 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Keysight Technologies Inc
4310-00-987-7801CP80461 INTERCHANGEABLE
Intercooler,compressor
Lexair Inc
4730-01-185-945312339889 INTERCHANGEABLE
Adapter,straight,pipe to Hose
Am General Llc
Cross-Reference Index
Part NumberManufacturer
1564 PRIMARY Harken Inc (USA)
Related Parts
5910-00-081-0633INTERCHANGEABLE
CAPACITOR,FIXED,PLASTIC DIELECTR
1564
5360-00-414-2084INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
1564
4720-00-541-9281INTERCHANGEABLE
HOSE,NONMETALLIC
5940-00-644-7948INTERCHANGEABLE
TERMINAL,LUG
1564
5905-00-830-9024INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
5310-00-843-3496INTERCHANGEABLE
WASHER,FLAT
3277-001
5305-00-924-1298INTERCHANGEABLE
SCREW,MACHINE
5905-00-929-3069INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
2100-0942
4310-00-987-7801INTERCHANGEABLE
INTERCOOLER,COMPRESSOR
CP80461
4730-01-185-9453INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO HOSE
12339889
5340-01-409-0351INTERCHANGEABLE
BRACKET,ANGLE
1564
5360-01-576-4699INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
1564

Frequently Asked Questions

What is NSN 3940-01-504-3464?

NSN 3940-01-504-3464 is a Block,tackle, manufactured by Harken Inc, classified under FSC 3940 (No Item Name Available). Status: active.

What are the part numbers for NSN 3940-01-504-3464?

NSN 3940-01-504-3464 has 1 cross-referenced part number: 1564 (Harken Inc).

What NSN replaces 3940-01-504-3464?

There are 12 known substitutes for 3940-01-504-3464: 5910-00-081-0633, 5360-00-414-2084, 4720-00-541-9281 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1564?

Key specifications for 1564: Material: ALUMINUM SHEAVE; Bearing Type: BALL; Load Rating: 1800.0 POUNDS MAXIMUM LBS; Special Features: FIDDLE W/CAM AND BECKET. 9 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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