PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

R121Reamer,hand

Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc · NSN 5110-01-437-2197 · FSC 5110 · No Item Name Available
Verified by PartsTable
NSN 5110-01-437-2197 — this item is cataloged by the U.S. Government under National Stock Number 5110-01-437-2197. Primary manufacturer part number: R121.
Features
  • Reamer,hand — FSC 5110
  • Large End Diameter: 1.000 INCHES NOMINAL IN
  • Handle Type: TEE
  • Reamer Type: REPAIRMANS TAPER
  • Flute Design: STRAIGHT
  • Small End Diameter: 0.500 INCHES NOMINAL IN
  • 1 verified cross-reference
  • Primary manufacturer: Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Reamer,hand, cataloged under National Stock Number 5110-01-437-2197, is classified within Federal Supply Class 5110 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc. Government technical data includes 5 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5110-01-437-2197
Primary Part NumberR121
Item NameReamer,hand
FSC / FSG5110 / 51 — No Item Name Available
ManufacturerIdsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
StatusCANCELLED
Large End Diameter1.000 INCHES NOMINAL IN
Handle TypeTEE
Reamer TypeREPAIRMANS TAPER
Flute DesignSTRAIGHT
Small End Diameter0.500 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5905-00-440-1569 INTERCHANGEABLE
Resistor Assembly
5331-01-315-2145 INTERCHANGEABLE
O-Ring
Cross-Reference Index
Part NumberManufacturer
R121 PRIMARY Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
Related Parts
5905-00-440-1569INTERCHANGEABLE
RESISTOR ASSEMBLY
5331-01-315-2145INTERCHANGEABLE
O-RING

Frequently Asked Questions

What is NSN 5110-01-437-2197?

NSN 5110-01-437-2197 is a Reamer,hand, manufactured by Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc, classified under FSC 5110 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5110-01-437-2197?

NSN 5110-01-437-2197 has 1 cross-referenced part number: R121 (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc).

What NSN replaces 5110-01-437-2197?

There are 2 known substitutes for 5110-01-437-2197: 5905-00-440-1569, 5331-01-315-2145. Verify interchangeability with system specifications before substitution.

What are the specifications of R121?

Key specifications for R121: Large End Diameter: 1.000 INCHES NOMINAL IN; Handle Type: TEE; Special Features: 3/8 IN. SQ HEAD FOR USE WITH SOCKET WRENCH IN; Reamer Type: REPAIRMANS TAPER. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5110-01-437-2197 still in active supply?

NSN 5110-01-437-2197 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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