1/4-20 UNC x 3.1/2 inch Imperial Plain Hexagon Bolts (ANSI B18.2.1) - Black Marine Stainless Steel (A4)

SEB-1/4-20-3.1/2-A4-BL

Key Features

  • Thread Size (T): 1/4-20
  • Length (L): 3.1/2 inch
  • Hexagon Width A/F (J): 0.438 inch
  • Material: Marine Stainless Steel (A4)
  • Finish: Matte Black
View Full Technical Specification.

Available In Other Materials & Finishes


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1/4-20 UNC x 3.1/2 inch Imperial Plain Hexagon Bolts (ANSI B18.2.1) - Black Marine Stainless Steel (A4) Technical Specification

1/4-20 UNC x 3.1/2 inch Imperial Plain Hexagon Bolts (ANSI B18.2.1) - Black Marine Stainless Steel (A4) Drawing
Hexagon Longueur (H)0.163 inch
Hexagon Width A/F (J)0.438 inch
Longueur (L)3.1/2 inch
Longueur de filetage (E)0.750-1 inch
MatérielMarine Stainless Steel (A4)
Métrique ou Impérial?Imperial
norme de fabricationANSI B18.2.1
Pas20 TPI
Taille de fil (T)1/4-20
terminerMatte Black
Tolérance générale+/-0.13mm
Vis Spécification MatériauStainless Steel (A2)

Product Certifications

Certificate of Conformity Included
Certificate of Conformity Included
RoHS Certified
RoHS Certified
REACH Certified
REACH Certified
ISO9001
ISO9001
Quality Approved

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1/4-20 UNC x 3.1/2 inch Imperial Plain Hexagon Bolts (ANSI B18.2.1) - Black Marine Stainless Steel (A4) Description

The 1/4-20 UNC x 3.1/2 inch Imperial Plain Hexagon Bolts (ANSI B18.2.1) - Black Marine Stainless Steel (A4) has the following features:

  • 1/4-20 Thread Size (T)
  • ANSI B18.2.1 Manufacturing Standard
  • 3.1/2 inch Length (L)
  • 0.750-1.000 inch Thread Length (E)
  • 0.163 inch Hexagon Length (H)
  • Marine Stainless Steel (A4) Material
  • 20 TPI Pitch
  • Stainless Steel (A2) Screw Material Specification
  • Matte Black Finish
  • +/-0.13mm General Tolerance
  • Imperial Metric or Imperial?
  • 0.438 inch Hexagon Width A/F (J)

Discover more about the Imperial Plain Hexagon Bolts range

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Shipping Information

Shipping Destinations:Worldwide.
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Weight: 0.02kg.

Component History

Product First Available:Sunday, June 28, 2015
Stock Last Updated:11:12 am
Sunday, November 28, 2021
Specification Last Updated:Sunday, November 28, 2021

APC / Barcodes

APC (Accu Product Code):SEB-1/4-20-3.1/2-A4-BL
EAN13 (International Article No.):5054328993532
ASIN (Amazon Stock Identification No.):ASIN not defined.