PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9900103Key,socket Head Screw

Lexmark International, Inc. Dba Lexmark · NSN 5120-00-115-9181 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-115-9181 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-115-9181. Primary manufacturer part number: 9900103.
Features
  • Key,socket Head Screw — FSC 5120
  • Material: STEEL OVERALL
  • Wrenching Surface Size: 0.111 INCHES NOMINAL BOTH ENDS IN
  • Style Designator: L-HANDLE
  • Surface Treatment: OXIDE OVERALL
  • Wrenching Surface Flute Quantity: 6
  • Wrenching Surface Shape: SPLINE BOTH ENDS EXTERNAL
  • Long Arm Length: 4.000 INCHES NOMINAL IN
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 5120-00-115-9181, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Lexmark International, Inc. Dba Lexmark. 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-00-115-9181
Primary Part Number9900103
Item NameKey,socket Head Screw
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerLexmark International, Inc. Dba Lexmark
StatusACTIVE
MaterialSTEEL OVERALL
Wrenching Surface Size0.111 INCHES NOMINAL BOTH ENDS IN
Style DesignatorL-HANDLE
Surface TreatmentOXIDE OVERALL
Wrenching Surface Flute Quantity6
Wrenching Surface ShapeSPLINE BOTH ENDS EXTERNAL
Long Arm Length4.000 INCHES NOMINAL IN
Short Arm Length1.000 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
2590-00-371-3137450029 INTERCHANGEABLE
Parts Kit,horn Button Switch
Zf Active Safety and Electronics Us Llc Div Trw Commercial Steering Systems
6150-01-689-0099450043 INTERCHANGEABLE
Cable Assembly,power,electrical
Zebra Technologies International Llc
Cross-Reference Index
Part NumberManufacturer
9900103 PRIMARY Lexmark International, Inc. Dba Lexmark (USA)
450043 International Business Machines Corporation Dba IBM (USA)
Related Parts
2590-00-371-3137INTERCHANGEABLE
PARTS KIT,HORN BUTTON SWITCH
450029
6150-01-689-0099INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL
450043

Frequently Asked Questions

What is NSN 5120-00-115-9181?

NSN 5120-00-115-9181 is a Key,socket Head Screw, manufactured by Lexmark International, Inc. Dba Lexmark, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-00-115-9181?

NSN 5120-00-115-9181 has 2 cross-referenced part numbers: 9900103 (Lexmark International, Inc. Dba Lexmark), 450043 (International Business Machines Corporation Dba IBM).

What NSN replaces 5120-00-115-9181?

There are 2 known substitutes for 5120-00-115-9181: 2590-00-371-3137, 6150-01-689-0099. Verify interchangeability with system specifications before substitution.

What are the specifications of 9900103?

Key specifications for 9900103: Material: STEEL OVERALL; Wrenching Surface Size: 0.111 INCHES NOMINAL BOTH ENDS IN; Style Designator: L-HANDLE; Surface Treatment: OXIDE OVERALL. 9 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com