PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B18.3Key,socket Head Screw

The American Society of Mechanical Engineers · NSN 5120-01-367-3238 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-01-367-3238 — this item is cataloged by the U.S. Government under National Stock Number 5120-01-367-3238. Primary manufacturer part number: B18.3.
Features
  • Key,socket Head Screw — FSC 5120
  • Specification/standard Data: 05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Material: STEEL OVERALL
  • Wrenching Surface Size: 0.060 INCHES NOMINAL BOTH ENDS IN
  • Wrenching Surface Shape: SPLINE BOTH ENDS EXTERNAL
  • Style Designator: L-HANDLE
  • Wrenching Surface Flute Quantity: 6
  • 2 verified cross-references
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 5120-01-367-3238, 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 6 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5120-01-367-3238
Primary Part NumberB18.3
Item NameKey,socket Head Screw
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerThe American Society of Mechanical Engineers
StatusCANCELLED
Specification/standard Data05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MaterialSTEEL OVERALL
Wrenching Surface Size0.060 INCHES NOMINAL BOTH ENDS IN
Wrenching Surface ShapeSPLINE BOTH ENDS EXTERNAL
Style DesignatorL-HANDLE
Wrenching Surface Flute Quantity6
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
6850-00-851-8725514 INTERCHANGEABLE
Desiccant,activated
Grace W R and Co Davison Chemical Div
Cross-Reference Index
Part NumberManufacturer
B18.3 The American Society of Mechanical Engineers (USA)
MS4A Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc (USA)
Related Parts
6850-00-851-8725INTERCHANGEABLE
DESICCANT,ACTIVATED
514

Frequently Asked Questions

What is NSN 5120-01-367-3238?

NSN 5120-01-367-3238 is a Key,socket Head Screw, manufactured by The American Society of Mechanical Engineers, classified under FSC 5120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5120-01-367-3238?

NSN 5120-01-367-3238 has 2 cross-referenced part numbers: B18.3 (The American Society of Mechanical Engineers), MS4A (Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc).

What NSN replaces 5120-01-367-3238?

There is 1 known substitute for 5120-01-367-3238: 6850-00-851-8725. Verify interchangeability with system specifications before substitution.

What are the specifications of B18.3?

Key specifications for B18.3: Specification/standard Data: 05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Material: STEEL OVERALL; Wrenching Surface Size: 0.060 INCHES NOMINAL BOTH ENDS IN; Wrenching Surface Shape: SPLINE BOTH ENDS EXTERNAL. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5120-01-367-3238 still in active supply?

NSN 5120-01-367-3238 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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