PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21491Reamer,hand

Morse Cutting Tools · NSN 5110-00-189-3378 · FSC 5110 · No Item Name Available
Verified by PartsTable
NSN 5110-00-189-3378 — this item is cataloged by the U.S. Government under National Stock Number 5110-00-189-3378. Primary manufacturer part number: 21491.
Features
  • Reamer,hand — FSC 5110
  • Specification/standard Data: 05047-ASME B94.2 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Flute Design: STRAIGHT
  • Taper Socket Size for Which Designed: 0 MORSE
  • Flute Length: 2.250 INCHES NOMINAL IN
  • Reamer Type: TAPER SOCKET FINISHING
  • Material: STEEL
  • Specification/standard Data: 05047-ASME B94.2 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Applications
  • Applications requiring Steel construction
General Description

The Reamer,hand, cataloged under National Stock Number 5110-00-189-3378, is classified within Federal Supply Class 5110 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Morse Cutting Tools. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 5 manufacturers, 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
NSN5110-00-189-3378
Primary Part Number21491
Item NameReamer,hand
FSC / FSG5110 / 51 — No Item Name Available
ManufacturerMorse Cutting Tools
StatusACTIVE
Specification/standard Data05047-ASME B94.2 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Flute DesignSTRAIGHT
Taper Socket Size for Which Designed0 MORSE
Flute Length2.250 INCHES NOMINAL IN
Reamer TypeTAPER SOCKET FINISHING
MaterialSTEEL
Specification/standard Data05047-ASME B94.2 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Shank TypeSTRAIGHT ROUND W/SQUARE END
Diameter0.312 INCHES NOMINAL IN
Taper Socket Size for Which Designed0 MORSE
MaterialSTEEL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5950-00-093-83212149-1 INTERCHANGEABLE
Coil,radio Frequency
American Trans-Coil Corp
5110-00-186-4190 INTERCHANGEABLE
Reamer,hand
5110-00-186-4191 INTERCHANGEABLE
Reamer,hand
5110-00-186-4192 INTERCHANGEABLE
Reamer,hand
5110-00-186-4193 INTERCHANGEABLE
Reamer,hand
5110-00-186-4194 INTERCHANGEABLE
Reamer,hand
5110-00-186-4195 INTERCHANGEABLE
Reamer,hand
6685-00-353-570121491 INTERCHANGEABLE
Indicator,temperature,electrical
Koehring Cranes, Inc Dba Terex Cranes Div Waverly Operations
4920-00-610-66492-1491 INTERCHANGEABLE
Meter Assy,flow
Jaidinger Manufacturing Co Inc Dba Jaidinger Manufacturing Co Inc
5999-00-691-780821-491 INTERCHANGEABLE
Contact,electrical
Eaton Corp Opns & Technical Center
Cross-Reference Index
Part NumberManufacturer
GGG-R-180 TY5CL1STAGRA General Services Administration Federal Supply Service (USA)
21491 Morse Cutting Tools Div of Morse Cutting Tool Corp (USA)
1636 Morse Cutting Tools (USA)
B94.2 The American Society of Mechanical Engineers (USA)
21491 PRIMARY Morse Cutting Tools (USA)
1636 Morse Cutting Tools Div of Morse Cutting Tool Corp (USA)
GGG-R-180 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
5950-00-093-8321INTERCHANGEABLE
COIL,RADIO FREQUENCY
2149-1
5110-00-186-4190INTERCHANGEABLE
REAMER,HAND
5110-00-186-4191INTERCHANGEABLE
REAMER,HAND
5110-00-186-4192INTERCHANGEABLE
REAMER,HAND
5110-00-186-4193INTERCHANGEABLE
REAMER,HAND
5110-00-186-4194INTERCHANGEABLE
REAMER,HAND
5110-00-186-4195INTERCHANGEABLE
REAMER,HAND
6685-00-353-5701INTERCHANGEABLE
INDICATOR,TEMPERATURE,ELECTRICAL
21491
4920-00-610-6649INTERCHANGEABLE
METER ASSY,FLOW
2-1491
5999-00-691-7808INTERCHANGEABLE
CONTACT,ELECTRICAL
21-491
5950-00-754-6426INTERCHANGEABLE
TRANSFORMER,POWER AUTOTRANSFORME
9137141
5840-01-157-7089INTERCHANGEABLE
SPLINE,STEEL ANTENN
21491

Frequently Asked Questions

What is NSN 5110-00-189-3378?

NSN 5110-00-189-3378 is a Reamer,hand, manufactured by Morse Cutting Tools, classified under FSC 5110 (No Item Name Available). Status: active.

What are the part numbers for NSN 5110-00-189-3378?

NSN 5110-00-189-3378 has 7 cross-referenced part numbers: GGG-R-180 TY5CL1STAGRA (General Services Administration Federal Supply Service), 21491 (Morse Cutting Tools Div of Morse Cutting Tool Corp), 1636 (Morse Cutting Tools), B94.2 (The American Society of Mechanical Engineers), 21491 (Morse Cutting Tools) and 2 more.

What NSN replaces 5110-00-189-3378?

There are 12 known substitutes for 5110-00-189-3378: 5950-00-093-8321, 5110-00-186-4190, 5110-00-186-4191 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21491?

Key specifications for 21491: Specification/standard Data: 05047-ASME B94.2 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Flute Design: STRAIGHT; Taper Socket Size for Which Designed: 0 MORSE; Flute Length: 2.250 INCHES NOMINAL IN. 12 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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