PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

125-1-2Knob

Raytheon Company Dba Raytheon Co · NSN 5355-00-668-5791 · FSC 5355 · No Item Name Available
Verified by PartsTable
NSN 5355-00-668-5791 — this item is cataloged by the U.S. Government under National Stock Number 5355-00-668-5791. Primary manufacturer part number: 125-1-2.
Features
  • Knob — FSC 5355
  • Inside Diameter: 0.250 INCHES NOMINAL IN
  • Setscrew Hole Quantity: 2
  • Gripping Surface Condition: SMOOTH
  • Attachment Method: SETSCREWS
  • Overall Thickness: 0.703 INCHES NOMINAL IN
  • Screw Drive Type: HEXAGON SOCKET
  • Style Designator: ROUND
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Knob, cataloged under National Stock Number 5355-00-668-5791, is classified within Federal Supply Class 5355 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Raytheon Company Dba Raytheon Co. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 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
NSN5355-00-668-5791
Primary Part Number125-1-2
Item NameKnob
FSC / FSG5355 / 53 — No Item Name Available
ManufacturerRaytheon Company Dba Raytheon Co
StatusACTIVE
Inside Diameter0.250 INCHES NOMINAL IN
Setscrew Hole Quantity2
Gripping Surface ConditionSMOOTH
Attachment MethodSETSCREWS
Overall Thickness0.703 INCHES NOMINAL IN
Screw Drive TypeHEXAGON SOCKET
Style DesignatorROUND
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SCREW HOLE
Nominal Thread Size0.164 INCHES SCREW HOLE IN
ColorBLACK
Thread Quantity Per Inch32 SCREW HOLE
Distance From Hole Center to Knob/skirt Base0.260 INCHES MAXIMUM IN
Shaft Accommodation StyleROUND
Outside Diameter1.255 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-144-86690210591 INTERCHANGEABLE
Bearing,ball,annular
Agco Corp Parts Opn
5950-00-189-30981M130-1 INTERCHANGEABLE
Reactor
Northrop Grumman Corp Electronic Systems Defensive System Div
5930-00-296-9258B3221-16 INTERCHANGEABLE
Switch,thermostatic
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
5930-00-359-3969 INTERCHANGEABLE
Switch,thermostatic
5950-00-390-567112512 INTERCHANGEABLE
Reactor
Stanford Applied Engineering Inc
5935-00-430-6321125-1-2 INTERCHANGEABLE
Connector,plug,electrical
Winchester Interconnect Corporation
5930-00-549-0358 INTERCHANGEABLE
Switch,thermostatic
5325-00-679-8117SS250 INTERCHANGEABLE
Ring,retaining
Timken Aerospace, Inc Dba Torrington Product
5340-00-682-1935125 1-2 INTERCHANGEABLE
Snap Hook
Eastern Co Div Eberhard Manufacturing
4320-00-917-6506 INTERCHANGEABLE
Piston,pump
Cross-Reference Index
Part NumberManufacturer
125-1-2 PRIMARY Raytheon Company Dba Raytheon Co (USA)
125-1-2 Raytheon Company Div Corp (USA)
Related Parts
3110-00-144-8669INTERCHANGEABLE
BEARING,BALL,ANNULAR
0210591
5950-00-189-3098INTERCHANGEABLE
REACTOR
1M130-1
5930-00-296-9258INTERCHANGEABLE
SWITCH,THERMOSTATIC
B3221-16
5930-00-359-3969INTERCHANGEABLE
SWITCH,THERMOSTATIC
5950-00-390-5671INTERCHANGEABLE
REACTOR
12512
5935-00-430-6321INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
125-1-2
5930-00-549-0358INTERCHANGEABLE
SWITCH,THERMOSTATIC
5325-00-679-8117INTERCHANGEABLE
RING,RETAINING
SS250
5340-00-682-1935INTERCHANGEABLE
SNAP HOOK
125 1-2
4320-00-917-6506INTERCHANGEABLE
PISTON,PUMP
5330-01-042-2814INTERCHANGEABLE
SEAL,PLAIN ENCASED
13676
6515-01-105-4644INTERCHANGEABLE
BONE PLATE

Frequently Asked Questions

What is NSN 5355-00-668-5791?

NSN 5355-00-668-5791 is a Knob, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 5355 (No Item Name Available). Status: active.

What are the part numbers for NSN 5355-00-668-5791?

NSN 5355-00-668-5791 has 2 cross-referenced part numbers: 125-1-2 (Raytheon Company Dba Raytheon Co), 125-1-2 (Raytheon Company Div Corp).

What NSN replaces 5355-00-668-5791?

There are 12 known substitutes for 5355-00-668-5791: 3110-00-144-8669, 5950-00-189-3098, 5930-00-296-9258 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 125-1-2?

Key specifications for 125-1-2: Inside Diameter: 0.250 INCHES NOMINAL IN; Setscrew Hole Quantity: 2; Gripping Surface Condition: SMOOTH; Overall Depth: 0.500 INCHES NOMINAL IN. 15 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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