PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

S81-3Knob

Kurz-Kasch Inc · NSN 5355-00-668-6049 · FSC 5355 · No Item Name Available
Verified by PartsTable
NSN 5355-00-668-6049 — this item is cataloged by the U.S. Government under National Stock Number 5355-00-668-6049. Primary manufacturer part number: S81-3.
Features
  • Knob — FSC 5355
  • Attachment Method: SETSCREWS
  • Overall Thickness: 0.688 INCHES NOMINAL IN
  • Screw Drive Type: HEXAGON SOCKET
  • Color: BLACK
  • Nominal Thread Size: 0.164 INCHES SCREW HOLE IN
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SCREW HOLE
  • Style Designator: CROWN
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Knob, cataloged under National Stock Number 5355-00-668-6049, is classified within Federal Supply Class 5355 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Kurz-Kasch Inc. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, 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
NSN5355-00-668-6049
Primary Part NumberS81-3
Item NameKnob
FSC / FSG5355 / 53 — No Item Name Available
ManufacturerKurz-Kasch Inc
StatusCANCELLED
Attachment MethodSETSCREWS
Overall Thickness0.688 INCHES NOMINAL IN
Screw Drive TypeHEXAGON SOCKET
ColorBLACK
Nominal Thread Size0.164 INCHES SCREW HOLE IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SCREW HOLE
Style DesignatorCROWN
Thread Quantity Per Inch32 SCREW HOLE
Distance From Hole Center to Knob/skirt Base0.156 INCHES NOMINAL IN
Shank StyleSTRAIGHT
Outside Diameter1.375 INCHES NOMINAL IN
Inside Diameter0.250 INCHES NOMINAL IN
Gripping Surface ConditionGRIP AID
Shaft Accommodation StyleROUND
Setscrew Hole Quantity1
Shank Diameter0.750 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
4820-00-334-386644477 INTERCHANGEABLE
Disk,valve
Spirax Sarco Inc Dba Spirax Sarco
5331-00-582-1560 INTERCHANGEABLE
O-Ring
Cross-Reference Index
Part NumberManufacturer
S81-3 PRIMARY Kurz-Kasch Inc (USA)
44477 Raytheon Technical Services Company (USA)
44477 Cae Usa Inc. (USA)
Related Parts
4820-00-334-3866INTERCHANGEABLE
DISK,VALVE
44477
5331-00-582-1560INTERCHANGEABLE
O-RING

Frequently Asked Questions

What is NSN 5355-00-668-6049?

NSN 5355-00-668-6049 is a Knob, manufactured by Kurz-Kasch Inc, classified under FSC 5355 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5355-00-668-6049?

NSN 5355-00-668-6049 has 3 cross-referenced part numbers: S81-3 (Kurz-Kasch Inc), 44477 (Raytheon Technical Services Company), 44477 (Cae Usa Inc.).

What NSN replaces 5355-00-668-6049?

There are 2 known substitutes for 5355-00-668-6049: 4820-00-334-3866, 5331-00-582-1560. Verify interchangeability with system specifications before substitution.

What are the specifications of S81-3?

Key specifications for S81-3: Attachment Method: SETSCREWS; Overall Thickness: 0.688 INCHES NOMINAL IN; Screw Drive Type: HEXAGON SOCKET; Color: BLACK. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5355-00-668-6049 still in active supply?

NSN 5355-00-668-6049 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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