PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ET17MMKey,socket Head Screw

Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc · NSN 5120-01-644-3452 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-644-3452 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-644-3452. Primary manufacturer part number: ET17MM.
Features
  • Key,socket Head Screw — FSC 5120
  • Short Arm Length: 2.420 INCHES NOMINAL IN
  • Wrenching Surface Shape: HEXAGON BOTH ENDS EXTERNAL
  • Long Arm Length: 6.140 INCHES NOMINAL IN
  • Surface Treatment: OXIDE OVERALL
  • Wrenching Surface Size: 17.0 MILLIMETERS NOMINAL BOTH ENDS MM
  • Style Designator: L-HANDLE
  • Features Provided: SHORT SERIES
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Key,socket Head Screw, cataloged under National Stock Number 5120-01-644-3452, is classified within Federal Supply Class 5120 (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 8 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-01-644-3452
Primary Part NumberET17MM
Item NameKey,socket Head Screw
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerIdsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
StatusCANCELLED
Short Arm Length2.420 INCHES NOMINAL IN
Wrenching Surface ShapeHEXAGON BOTH ENDS EXTERNAL
Long Arm Length6.140 INCHES NOMINAL IN
Surface TreatmentOXIDE OVERALL
Wrenching Surface Size17.0 MILLIMETERS NOMINAL BOTH ENDS MM
Style DesignatorL-HANDLE
Features ProvidedSHORT SERIES
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5330-00-126-1095EV692B INTERCHANGEABLE
Gasket
Eaton Aerospace, Llc Dba Jackson South
5935-00-228-5862 INTERCHANGEABLE
Connector,plug,electrical
2520-00-377-4507CX111C002 INTERCHANGEABLE
Clutch Assembly,friction
Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
9540-00-555-1081 INTERCHANGEABLE
Angle,structural
4730-01-026-6503 INTERCHANGEABLE
Flange,pipe
5310-01-147-666915534 INTERCHANGEABLE
Nut
Cooper Cameron Corp Cooper Cameron Valves Div
5340-01-287-0350155---0100 AV INTERCHANGEABLE
Plug,vent
Morrison Brothers Co Dba Morrison Brothers Co
6240-01-344-6966120PAR/CAP/FL/120V INTERCHANGEABLE
Lamp,incandescent
Gte Products Corp Sylvania Miniature Lighting Div
Cross-Reference Index
Part NumberManufacturer
ET17MM PRIMARY Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
15534 PRIMARY Eklind Tool Co (USA)
Related Parts
5330-00-126-1095INTERCHANGEABLE
GASKET
EV692B
5935-00-228-5862INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
2520-00-377-4507INTERCHANGEABLE
CLUTCH ASSEMBLY,FRICTION
CX111C002
9540-00-555-1081INTERCHANGEABLE
ANGLE,STRUCTURAL
4730-01-026-6503INTERCHANGEABLE
FLANGE,PIPE
5310-01-147-6669INTERCHANGEABLE
NUT
15534
5340-01-287-0350INTERCHANGEABLE
PLUG,VENT
155---0100 AV
6240-01-344-6966INTERCHANGEABLE
LAMP,INCANDESCENT
120PAR/CAP/FL/120V

Frequently Asked Questions

What is NSN 5120-01-644-3452?

NSN 5120-01-644-3452 is a Key,socket Head Screw, manufactured by Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-01-644-3452?

NSN 5120-01-644-3452 has 2 cross-referenced part numbers: ET17MM (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc), 15534 (Eklind Tool Co).

What NSN replaces 5120-01-644-3452?

There are 8 known substitutes for 5120-01-644-3452: 5330-00-126-1095, 5935-00-228-5862, 2520-00-377-4507 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of ET17MM?

Key specifications for ET17MM: Short Arm Length: 2.420 INCHES NOMINAL IN; Wrenching Surface Shape: HEXAGON BOTH ENDS EXTERNAL; Long Arm Length: 6.140 INCHES NOMINAL IN; Surface Treatment: OXIDE OVERALL. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-01-644-3452 still in active supply?

NSN 5120-01-644-3452 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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