PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51873Fastline,sheave Case Kit

Allied Systems Company Dba Allied Systems Co · NSN 3815-01-503-1146 · FSC 3815 · No Item Name Available
Verified by PartsTable
NSN 3815-01-503-1146 — this item is cataloged by the U.S. Government under National Stock Number 3815-01-503-1146. Primary manufacturer part number: 51873.
Features
  • Fastline,sheave Case Kit — FSC 3815
  • General Characteristics Item Description: KIT CONSISTS OF 2 PIN WELDMENTS, 2 LOCK COLLARS, 2 CAPSCREWS; 1 PLATE SPACER; 2 LUBES; 2 PLATE SPACERS; 2 ESNA NUTS; 2 FLAT WASHERS; 2 BUSHINGS; 1 WASHER; 1 PUCK; 1 JAM NUT; 2 CAPSCREWS; 2 SHEAVE ASSEMBLIES
  • 1 verified cross-reference
  • Primary manufacturer: Allied Systems Company Dba Allied Systems Co
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Fastline,sheave Case Kit, cataloged under National Stock Number 3815-01-503-1146, is classified within Federal Supply Class 3815 (No Item Name Available) of the Construction, Mining, Excavating Equipment group. The primary manufacturer of record is Allied Systems Company Dba Allied Systems Co. Government technical data includes 1 verified specification, 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3815-01-503-1146
Primary Part Number51873
Item NameFastline,sheave Case Kit
FSC / FSG3815 / 38 — No Item Name Available
ManufacturerAllied Systems Company Dba Allied Systems Co
StatusACTIVE
General Characteristics Item DescriptionKIT CONSISTS OF 2 PIN WELDMENTS, 2 LOCK COLLARS, 2 CAPSCREWS; 1 PLATE SPACER; 2 LUBES; 2 PLATE SPACERS; 2 ESNA NUTS; 2 FLAT WASHERS; 2 BUSHINGS; 1 WASHER; 1 PUCK; 1 JAM NUT; 2 CAPSCREWS; 2 SHEAVE ASSEMBLIES
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
1610-00-119-716151873 INTERCHANGEABLE
Plate
Hamilton Sundstrand Corporation Dba Collins Aerospace
4730-00-328-53155187-3 INTERCHANGEABLE
Coupling Half,quick Disconnect
Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division
5360-00-598-4991SCB69326-26 INTERCHANGEABLE
Spring,helical,extension
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
1420-00-621-7708 INTERCHANGEABLE
Block,heater
1680-00-858-04315187-3 INTERCHANGEABLE
Back Assembly,seat
Lockheed Martin Corp
6532-01-588-867851873 INTERCHANGEABLE
Shoe,vinyl Cast
Bsn Medical Inc
4730-01-640-670051873 INTERCHANGEABLE
Plug,pipe
Lowes Companies Inc Dba Lowes Div Lowes of Madison
5325-01-734-115151873 INTERCHANGEABLE
Ring,retaining
Vigor Works Llc
Cross-Reference Index
Part NumberManufacturer
51873 PRIMARY Allied Systems Company Dba Allied Systems Co (USA)
Related Parts
1610-00-119-7161INTERCHANGEABLE
PLATE
51873
4730-00-328-5315INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
5187-3
5360-00-598-4991INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
SCB69326-26
1420-00-621-7708INTERCHANGEABLE
BLOCK,HEATER
1680-00-858-0431INTERCHANGEABLE
BACK ASSEMBLY,SEAT
5187-3
6532-01-588-8678INTERCHANGEABLE
SHOE,VINYL CAST
51873
4730-01-640-6700INTERCHANGEABLE
PLUG,PIPE
51873
5325-01-734-1151INTERCHANGEABLE
RING,RETAINING
51873

Frequently Asked Questions

What is NSN 3815-01-503-1146?

NSN 3815-01-503-1146 is a Fastline,sheave Case Kit, manufactured by Allied Systems Company Dba Allied Systems Co, classified under FSC 3815 (No Item Name Available). Status: active.

What are the part numbers for NSN 3815-01-503-1146?

NSN 3815-01-503-1146 has 1 cross-referenced part number: 51873 (Allied Systems Company Dba Allied Systems Co).

What NSN replaces 3815-01-503-1146?

There are 8 known substitutes for 3815-01-503-1146: 1610-00-119-7161, 4730-00-328-5315, 5360-00-598-4991 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 51873?

Key specifications for 51873: End Item Identification: CRANE,BUOY HANDLING, PART NUMBER TB90-60/1771 ABOARD 225 FT WLB COAST GUARD VESSELS FT; General Characteristics Item Description: KIT CONSISTS OF 2 PIN WELDMENTS, 2 LOCK COLLARS, 2 CAPSCREWS; 1 PLATE SPACER; 2 LUBES; 2 PLATE SPACERS; 2 ESNA NUTS; 2 FLAT WASHERS; 2 BUSHINGS; 1 WASHER; 1 PUCK; 1 JAM NUT; 2 CAPSCREWS; 2 SHEAVE ASSEMBLIES. 2 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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