PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B18.3Key,socket Head Screw

The American Society of Mechanical Engineers · NSN 5120-01-335-2094 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-335-2094 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-335-2094. Primary manufacturer part number: B18.3.
Features
  • Key,socket Head Screw — FSC 5120
  • Long Arm Length: 4.250 INCHES NOMINAL IN
  • Features Provided: SHORT SERIES
  • Short Arm Length: 1.375 INCHES NOMINAL IN
  • Style Designator: L-HANDLE
  • Specification/standard Data: 05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Material: STEEL OVERALL
  • Wrenching Surface Size: 0.375 INCHES NOMINAL BOTH ENDS 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 5120-01-335-2094, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 9 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5120-01-335-2094
Primary Part NumberB18.3
Item NameKey,socket Head Screw
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerThe American Society of Mechanical Engineers
StatusACTIVE
Long Arm Length4.250 INCHES NOMINAL IN
Features ProvidedSHORT SERIES
Short Arm Length1.375 INCHES NOMINAL IN
Style DesignatorL-HANDLE
Specification/standard Data05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MaterialSTEEL OVERALL
Wrenching Surface Size0.375 INCHES NOMINAL BOTH ENDS IN
Surface TreatmentOXIDE OVERALL
Wrenching Surface ShapeHEXAGON BOTH ENDS EXTERNAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5120-00-198-5390 INTERCHANGEABLE
Key,socket Head Screw
7530-00-261-381857030 INTERCHANGEABLE
Card Set,guide,file
Smead Mfg Co
2530-00-734-7826 INTERCHANGEABLE
Brake Shoe
1420-00-986-2108 INTERCHANGEABLE
Cover,access,guided Missile Comp
5130-01-412-5177 INTERCHANGEABLE
Sander,disk,pneumatic,portable
Cross-Reference Index
Part NumberManufacturer
B18.3 The American Society of Mechanical Engineers (USA)
57030 Apex Tool Group, Llc Dba Nicholson (USA)
57030 Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc. (USA)
Related Parts
5120-00-198-5390INTERCHANGEABLE
KEY,SOCKET HEAD SCREW
7530-00-261-3818INTERCHANGEABLE
CARD SET,GUIDE,FILE
57030
2530-00-734-7826INTERCHANGEABLE
BRAKE SHOE
1420-00-986-2108INTERCHANGEABLE
COVER,ACCESS,GUIDED MISSILE COMP
5130-01-412-5177INTERCHANGEABLE
SANDER,DISK,PNEUMATIC,PORTABLE

Frequently Asked Questions

What is NSN 5120-01-335-2094?

NSN 5120-01-335-2094 is a Key,socket Head Screw, manufactured by The American Society of Mechanical Engineers, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-01-335-2094?

NSN 5120-01-335-2094 has 3 cross-referenced part numbers: B18.3 (The American Society of Mechanical Engineers), 57030 (Apex Tool Group, Llc Dba Nicholson), 57030 (Easco Hand Tools Inc Dba Danaher Tool Group Div Danaher Tool Group Easco Hand Tools Inc.).

What NSN replaces 5120-01-335-2094?

There are 5 known substitutes for 5120-01-335-2094: 5120-00-198-5390, 7530-00-261-3818, 2530-00-734-7826 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B18.3?

Key specifications for B18.3: Long Arm Length: 4.250 INCHES NOMINAL IN; Features Provided: SHORT SERIES; Short Arm Length: 1.375 INCHES NOMINAL IN; Style Designator: L-HANDLE. 9 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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