1/4-28 UNF x 1 inch Imperial Fillister Screws - Stainless Steel (A2)


Key Features

  • 3 Year Extended Warranty.
  • Free Technical Support From Our Engineers.
  • A2 Stainless Steel, also known as 18-8 or 304 Stainless Steel.
  • Thread Size (T): 1/4-28
  • Length (L): 1 inch
View Full Technical Specification.

Available In Other Materials & Finishes

Simple 90 day returns. Details.
Official AccuScrews Product.
$2.15 / each.
Buy more & save
Buy 5$1.80 / eachSave 16%
Buy 10$1.46 / eachSave 32%
Buy 20$1.24 / eachSave 42%
Buy 50$1.07 / eachSave 50%
Buy 100$0.93 / eachSave 57%
Buy 200$0.87 / eachSave 59%
Buy 400$0.82 / eachSave 62%
Buy 800$0.77 / eachSave 64%
Buy 1000$0.73 / eachSave 66%
Buy 2000$0.70 / eachSave 67%
4000 +Get A Quote
Get up to 8 Express Stock
Up to 88 1 Day
Up to 4,288 15 Days

Complete Your Project

Similar Engineers Also Viewed

1/4-28 UNF x 1 inch Imperial Fillister Screws - Stainless Steel (A2) Technical Specification

1/4-28 UNF x 1 inch Imperial Fillister Screws - Stainless Steel (A2) Drawing
Head Diameter (D)0.414 inch
Head Height (H)0.237 inch
Length (L)1 inch
Manufacturing StandardANSI B18.6.3
MaterialStainless Steel (A2)
Material SpecificationStainless Steel (A2)
Metric or Imperial?Imperial
Slot Depth (F)0.109 inch
Slot Width (A)0.075 inch
Thread Size (T)1/4-28
Thread StandardUNF
Threads / Inch28 TPI

Product Certifications

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

Download 3D Models

3D model downloads are free for our customers.

log in / sign up

1/4-28 UNF x 1 inch Imperial Fillister Screws - Stainless Steel (A2) Description

The 1/4-28 UNF x 1 inch Imperial Fillister Screws - Stainless Steel (A2) has the following features:

  • 1/4-28 Thread Size (T)
  • ANSI B18.6.3 Manufacturing Standard
  • 1 inch Length (L)
  • 0.075 inch Slot Width (A)
  • 0.109 inch Slot Depth (F)
  • Stainless Steel (A2) Material
  • Stainless Steel (A2) Material Specification
  • Natural Finish
  • 28 TPI Threads / Inch
  • UNF Thread Standard
  • 0.237 inch Head Height (H)
  • Imperial Metric or Imperial?
  • 0.414 inch Head Diameter (D)

Discover more about the Fillister Screws range.

Fillister Screws are part of Accu's extensive range of Precision Screws. These fasteners are an imperial component, featuring a reduced diameter cylindrical head, which allows them to be used in applications where space is limited. Fillister Screws have an increased head height and a deeper drive slot when compared to equivalent round-headed fasteners such as Cheese Head Screws. These fasteners are widely used in electrical applications.

Components within this range can be installed using one of AccuScrews’ Insulated Slotted Screwdrivers or Slotted Drive Bits.


These A2 Stainless Steel fillister screws can be ordered with Chemical Blacking and Thread Locking Patches on request. For additional materials and finishes, please contact our sales team.

Imperial Fillister Screws

Fillister Screws are available in diameters of between #0 and 3/8 inch, and in lengths ranging from 1/8 inch up to 6 inch.

Shipping Information

Shipping Destinations:Worldwide.
View delivery information.
Weight Band (100 items):Between 0.5kg and 1kg. Add to cart to calculate exact weights.

Component History

Product First Available:Sunday, June 28, 2015
Stock Last Updated:06:23 am
Saturday, January 22, 2022
Specification Last Updated:Saturday, January 22, 2022

APC / Barcodes

APC (Accu Product Code):SFI-1/4-28-1-A2
EAN13 (International Article No.):5054328374249
ASIN (Amazon Stock Identification No.):ASIN not defined.