PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21042Countersink

Keo Cutters Div of Masco Corp · NSN 5133-01-662-4809 · FSC 5133 · No Item Name Available
Verified by PartsTable
NSN 5133-01-662-4809 — this item is cataloged by the U.S. Government under National Stock Number 5133-01-662-4809. Primary manufacturer part number: 21042.
Features
  • Countersink — FSC 5133
  • Included Angle: 60.0 DEGREES NOMINAL
  • Thread Direction: RIGHT-HAND
  • Point Diameter: 0.047 INCHES NOMINAL IN
  • Body Diameter: 0.125 INCHES NOMINAL IN
  • 1 verified cross-reference
  • Primary manufacturer: Keo Cutters Div of Masco Corp
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Countersink, cataloged under National Stock Number 5133-01-662-4809, is classified within Federal Supply Class 5133 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Keo Cutters Div of Masco Corp. Government technical data includes 4 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5133-01-662-4809
Primary Part Number21042
Item NameCountersink
FSC / FSG5133 / 51 — No Item Name Available
ManufacturerKeo Cutters Div of Masco Corp
StatusACTIVE
Included Angle60.0 DEGREES NOMINAL
Thread DirectionRIGHT-HAND
Point Diameter0.047 INCHES NOMINAL IN
Body Diameter0.125 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5330-00-292-0490 INTERCHANGEABLE
Seal,plain Encased
3950-00-463-5259 INTERCHANGEABLE
Cam,brake
4330-01-040-5516921042 INTERCHANGEABLE
Filter Element,fluid
Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division
5930-01-075-0224 INTERCHANGEABLE
Switch,rotary
5330-01-168-5401 INTERCHANGEABLE
Seal
5330-01-207-735421042 INTERCHANGEABLE
Gasket
Parker Hannifin Corporation Div Hydraulic Systems Division
5305-01-212-3451 INTERCHANGEABLE
Screw,machine
5355-01-242-49762-104-2 INTERCHANGEABLE
Knob
Bei Sensors & Systems Company, Inc. Dba Bei Duncan
4720-01-464-249221042 INTERCHANGEABLE
Hose,preformed
Gates Corporation
5360-01-592-187621042 INTERCHANGEABLE
Spring,helical,compression
Mission Systems Orchard Park Inc
Cross-Reference Index
Part NumberManufacturer
21042 PRIMARY Keo Cutters Div of Masco Corp (USA)
Related Parts
5330-00-292-0490INTERCHANGEABLE
SEAL,PLAIN ENCASED
3950-00-463-5259INTERCHANGEABLE
CAM,BRAKE
4330-01-040-5516INTERCHANGEABLE
FILTER ELEMENT,FLUID
921042
5930-01-075-0224INTERCHANGEABLE
SWITCH,ROTARY
5330-01-168-5401INTERCHANGEABLE
SEAL
5330-01-207-7354INTERCHANGEABLE
GASKET
21042
5305-01-212-3451INTERCHANGEABLE
SCREW,MACHINE
5355-01-242-4976INTERCHANGEABLE
KNOB
2-104-2
4720-01-464-2492INTERCHANGEABLE
HOSE,PREFORMED
21042
5360-01-592-1876INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
21042

Frequently Asked Questions

What is NSN 5133-01-662-4809?

NSN 5133-01-662-4809 is a Countersink, manufactured by Keo Cutters Div of Masco Corp, classified under FSC 5133 (No Item Name Available). Status: active.

What are the part numbers for NSN 5133-01-662-4809?

NSN 5133-01-662-4809 has 1 cross-referenced part number: 21042 (Keo Cutters Div of Masco Corp).

What NSN replaces 5133-01-662-4809?

There are 10 known substitutes for 5133-01-662-4809: 5330-00-292-0490, 3950-00-463-5259, 4330-01-040-5516 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21042?

Key specifications for 21042: Included Angle: 60.0 DEGREES NOMINAL; Special Features: SIZE: NO.1; POINT LENGTH: 0.047 IN; UNCOATED; MATERIAL: COBALT IN; Thread Direction: RIGHT-HAND; Overall Length: 4.000 INCHES NOMINAL IN. 7 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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