PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51873Block,heater

Hathaway Corporation · NSN 1420-00-621-7708 · FSC 1420 · No Item Name Available
Verified by PartsTable
NSN 1420-00-621-7708 — this item is cataloged by the U.S. Government under National Stock Number 1420-00-621-7708. Primary manufacturer part number: 51873.
Features
  • Block,heater — FSC 1420
  • 1 verified cross-reference
  • Primary manufacturer: Hathaway Corporation
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Block,heater, cataloged under National Stock Number 1420-00-621-7708, is classified within Federal Supply Class 1420 (No Item Name Available) of the Guided Missiles group. The primary manufacturer of record is Hathaway Corporation. 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.

Catalog Facts
Item NameBlock,heater
FSC / FSG1420 — No Item Name Available (FSG 14)
ManufacturersHathaway Corporation (CAGE 27682)
Technical Specifications
ParameterValue
NSN1420-00-621-7708
Primary Part Number51873
Item NameBlock,heater
FSC / FSG1420 / 14 — No Item Name Available
ManufacturerHathaway Corporation
StatusACTIVE
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
1680-00-858-04315187-3 INTERCHANGEABLE
Back Assembly,seat
Lockheed Martin Corp
3815-01-503-114651873 INTERCHANGEABLE
Fastline,sheave Case Kit
Allied Systems Company Dba Allied Systems Co
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 Hathaway Corporation (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
1680-00-858-0431INTERCHANGEABLE
BACK ASSEMBLY,SEAT
5187-3
3815-01-503-1146INTERCHANGEABLE
FASTLINE,SHEAVE CASE KIT
51873
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 1420-00-621-7708?

NSN 1420-00-621-7708 is a Block,heater, manufactured by Hathaway Corporation, classified under FSC 1420 (No Item Name Available). Status: active.

What are the part numbers for NSN 1420-00-621-7708?

NSN 1420-00-621-7708 has 1 cross-referenced part number: 51873 (Hathaway Corporation).

What NSN replaces 1420-00-621-7708?

There are 8 known substitutes for 1420-00-621-7708: 1610-00-119-7161, 4730-00-328-5315, 5360-00-598-4991 and 5 more. Verify interchangeability with system specifications before substitution.

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