PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

R21239Nitrate Reagent

Remel Inc. · NSN 6550-01-374-1402 · FSC 6550 · No Item Name Available
Verified by PartsTable
NSN 6550-01-374-1402 — this item is cataloged by the U.S. Government under National Stock Number 6550-01-374-1402. Primary manufacturer part number: R21239.
Features
  • Nitrate Reagent — FSC 6550
  • General Characteristics Item Description: 50 ML PER BOTTLE; USED TO DETERMINE ABILITY OF ORGANISM TO REDUCE NITRATE TO NITRITES OR FREE NITROGEN GAS; REAGENT A
  • 3 verified cross-references
  • Primary manufacturer: Remel Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Nitrate Reagent, cataloged under National Stock Number 6550-01-374-1402, is classified within Federal Supply Class 6550 (No Item Name Available) of the Medical, Dental, and Veterinary Equipment group. The primary manufacturer of record is Remel Inc.. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: BT.

Technical Specifications
ParameterValue
NSN6550-01-374-1402
Primary Part NumberR21239
Item NameNitrate Reagent
FSC / FSG6550 / 65 — No Item Name Available
ManufacturerRemel Inc.
StatusACTIVE
General Characteristics Item Description50 ML PER BOTTLE; USED TO DETERMINE ABILITY OF ORGANISM TO REDUCE NITRATE TO NITRITES OR FREE NITROGEN GAS; REAGENT A
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueBT
Verified Substitutes 6
5920-00-142-48421034-4-20 INTERCHANGEABLE
Fuse,cartridge
Naval Air Warfare Center Aircraft Division Joint Base Jbmdl
5110-00-255-6579 INTERCHANGEABLE
Reamer,hand
2530-00-737-1107 INTERCHANGEABLE
Tie Rod End,steering
5330-01-228-618221239 INTERCHANGEABLE
Gasket
Mirion Technologies (canberra), Inc.
6550-01-243-3707 INTERCHANGEABLE
Culture Medium,trypticase Soy BL
2530-01-265-324921239 INTERCHANGEABLE
Cylinder Assembly,actuating,line
Mark Industries
Cross-Reference Index
Part NumberManufacturer
21-239 Remel Inc. (USA)
R21239 PRIMARY Remel Inc. (USA)
F93C221 Air Force Medical Logistics Office (USA)
Related Parts
5920-00-142-4842INTERCHANGEABLE
FUSE,CARTRIDGE
1034-4-20
5110-00-255-6579INTERCHANGEABLE
REAMER,HAND
2530-00-737-1107INTERCHANGEABLE
TIE ROD END,STEERING
5330-01-228-6182INTERCHANGEABLE
GASKET
21239
6550-01-243-3707INTERCHANGEABLE
CULTURE MEDIUM,TRYPTICASE SOY BL
2530-01-265-3249INTERCHANGEABLE
CYLINDER ASSEMBLY,ACTUATING,LINE
21239

Frequently Asked Questions

What is NSN 6550-01-374-1402?

NSN 6550-01-374-1402 is a Nitrate Reagent, manufactured by Remel Inc., classified under FSC 6550 (No Item Name Available). Status: active.

What are the part numbers for NSN 6550-01-374-1402?

NSN 6550-01-374-1402 has 3 cross-referenced part numbers: 21-239 (Remel Inc.), R21239 (Remel Inc.), F93C221 (Air Force Medical Logistics Office).

What NSN replaces 6550-01-374-1402?

There are 6 known substitutes for 6550-01-374-1402: 5920-00-142-4842, 5110-00-255-6579, 2530-00-737-1107 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of R21239?

Key specifications for R21239: Part Name Assigned by Controlling Agency: NITRATE REAGENT 50ML REAGENT 1.69 OZ. PER BOTTLE. OZ; General Characteristics Item Description: 50 ML PER BOTTLE; USED TO DETERMINE ABILITY OF ORGANISM TO REDUCE NITRATE TO NITRITES OR FREE NITROGEN GAS; REAGENT A. 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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