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Socket Cap Screws, Stainless Steel 18-8, 1/4"-28 x 3/8, Full Thread

Screw Diameter - Thread Pitch: 1/4"-28

1/4"-28 Stainless steel Knurled Head socket cap screws are bolts or machine screws with a Hex or Allen drive style.

  • Commonly referred to as allen bolts, socket head cap screws, or socket head screws
  • Driven manually, or with a Hex Allen Bit or Key
  • Cylindrical head
  • 18-8 Stainless Steel offer the Fastener Industry standard for corrosion and rust resistance
  • Recommended for use in exterior applications, or those that are exposed to fresh water moisture
The term socket head cap screw typically refers to a type of threaded fastener whose head diameter is nominally 1.5 times or more that of the screw shank (major) diameter.

Sizes Listed As:
Diameter - Thread Pitch x Length from Underside of Head
FT = Full Thread
PT = Partial Thread

Product number: 29012
Print this page
Click on a size/sku in the table to view product-specific details and specifications.
FT = Full Thread (threaded the entire length)  ·  PT = Partial Thread (unthreaded shoulder below the head)

Specifications

  • Chamfer on Radius: Max 0.008
  • Color: Silver
  • Condition: New
  • Corrosion Resistant: Yes
  • Diameter: 1/4"
  • Drive Style: Internal Hex (Allen)
  • Head Type: Socket Head
  • Thread Direction: Right Hand
  • Thread Type: Fine
  • Fit: 3A
  • FT = Full Thread: Yes
  • Grade: 18-8
  • Head Height: Max 0.250 - Min 0.244
  • Head Height Max: 0.25
  • Head Diameter: Max 0.375 - Min 0.365
  • Head Side Height: Min 0.225
  • Head Style: Socket Cap
  • Hex Drive: 3/16"
  • Length: 3/8
  • Material: Stainless Steel
  • Overall Head Height: Max 0.250 - Min 0.244
  • Part Number: 618930297973
  • Product Type: Socket Cap Screws
  • Size System: US
  • Size Type: Regular
  • System of Measurement: Inch
  • Thread Direction: Right Hand
  • Thread Pitch: 28 Per Inch
  • Thread Size: 1/4"-28
  • Thread Standard: UNF
  • Thread Type: Fine
  • Tolerance (IFI): Actual measurements may vary slightly +/- depending on production run within IFI Tolerances
  • Weight: 1 lb

Frequently Used With

Flat Washers, Stainless Steel 304, 1/4" (.281 ID x 5/8 OD x .050 Thick) Flat Washers, Stainless Steel 304, 1/4" (.281 ID x 5/8 OD x .050 Thick)
Volume Pricing*
1
$0.09
($0.09/ea)
100
$3.00
($0.03/ea)
1000
$20.00
($0.02/ea)
$0.00
Lock Washers, Split Ring, Stainless Steel 304, 1/4" (.252 ID x .487 OD x .062 Thick) Lock Washers, Split Ring, Stainless Steel 304, 1/4" (.252 ID x .487 OD x .062 Thick)
Volume Pricing*
1
$0.08
($0.08/ea)
100
$4.00
($0.04/ea)
1000
$30.00
($0.03/ea)
$0.00
Hex Finish Nuts, Stainless Steel 304, 1/4"-28 (7/16" Flats x 7/32" Thick) Hex Finish Nuts, Stainless Steel 304, 1/4"-28 (7/16" Flats x 7/32" Thick)
Volume Pricing*
1
$0.13
($0.13/ea)
100
$7.00
($0.07/ea)
1000
$60.00
($0.06/ea)
$0.00
Nylon Lock Nuts, Stainless Steel 304, 1/4-28 (.439 Flats x .328 Height) Nylon Lock Nuts, Stainless Steel 304, 1/4-28 (.439 Flats x .328 Height)
Volume Pricing*
1
$0.17
($0.17/ea)
100
$12.00
($0.12/ea)
1000
$100.00
($0.10/ea)
$0.00
Hex Socket Head Allen Power Bits, 3/16, Length 2" Hex Socket Head Allen Power Bits, 3/16, Length 2"
Volume Pricing*
1
$3.15
($3.15/ea)
10
$29.80
($2.98/ea)
50
$129.50
($2.59/ea)
$0.00
Hex Allen Key, Long Arm, Black Alloy Steel, 3/16" Hex Allen Key, Long Arm, Black Alloy Steel, 3/16"
Volume Pricing*
1
$0.74
($0.74/ea)
100
$69.00
($0.69/ea)
1000
$650.00
($0.65/ea)
$0.00
Select Size/SKU & Quantity
22 Available Sizes
SIZE/SKU Review Volume Pricing* Enter Any Qty
1/4"-28 x 1/4" FT
29002
1
$0.22 ($0.22/ea)
100
$18.00 ($0.18/ea)
1000
$160.00 ($0.16/ea)
$0.00
1/4"-28 x 5/16" FT
290102
1
$0.24 ($0.24/ea)
100
$20.00 ($0.20/ea)
1000
$170.00 ($0.17/ea)
$0.00
1/4"-28 x 3/8" FT
29012
1
$0.25 ($0.25/ea)
100
$19.00 ($0.19/ea)
1000
$170.00 ($0.17/ea)
$0.00
1/4"-28 x 7/16" FT
290202
1
$0.28 ($0.28/ea)
100
$25.00 ($0.25/ea)
1000
$230.00 ($0.23/ea)
$0.00
1/4"-28 x 1/2" FT
29022
1
$0.26 ($0.26/ea)
100
$22.00 ($0.22/ea)
1000
$180.00 ($0.18/ea)
$0.00
1/4"-28 x 5/8" FT
29032
1
$0.29 ($0.29/ea)
100
$22.00 ($0.22/ea)
1000
$190.00 ($0.19/ea)
$0.00
1/4"-28 x 3/4" FT
29042
1
$0.29 ($0.29/ea)
100
$23.00 ($0.23/ea)
1000
$200.00 ($0.20/ea)
$0.00
1/4"-28 x 7/8" FT
29052
1
$0.32 ($0.32/ea)
100
$24.00 ($0.24/ea)
1000
$210.00 ($0.21/ea)
$0.00
1/4"-28 x 1" FT
29062
1
$0.33 ($0.33/ea)
100
$25.00 ($0.25/ea)
1000
$220.00 ($0.22/ea)
$0.00
1/4"-28 x 1-1/8" FT
290702
1
$0.36 ($0.36/ea)
100
$14.00 ($0.14/ea)
1000
$120.00 ($0.12/ea)
$0.00
1/4"-28 x 1-1/4" FT
29072
1
$0.36 ($0.36/ea)
100
$27.00 ($0.27/ea)
1000
$230.00 ($0.23/ea)
$0.00
1/4"-28 x 1-3/8" FT
290802
1
$0.41 ($0.41/ea)
100
$15.00 ($0.15/ea)
1000
$140.00 ($0.14/ea)
$0.00
1/4"-28 x 1-1/2" PT
29082
1
$0.41 ($0.41/ea)
100
$30.00 ($0.30/ea)
1000
$260.00 ($0.26/ea)
$0.00
1/4"-28 x 1-5/8" PT
290902
1
$0.41 ($0.41/ea)
100
$15.00 ($0.15/ea)
1000
$140.00 ($0.14/ea)
$0.00
1/4"-28 x 1-3/4" PT
29092
1
$0.46 ($0.46/ea)
100
$34.00 ($0.34/ea)
1000
$290.00 ($0.29/ea)
$0.00
1/4"-28 x 2" PT
29102
1
$0.53 ($0.53/ea)
100
$38.00 ($0.38/ea)
1000
$330.00 ($0.33/ea)
$0.00
1/4"-28 x 2-1/4" PT
291102
1
$0.70 ($0.70/ea)
100
$60.00 ($0.60/ea)
1000
$550.00 ($0.55/ea)
$0.00
1/4"-28 x 2-1/2" PT
29112
1
$0.81 ($0.81/ea)
100
$59.00 ($0.59/ea)
1000
$520.00 ($0.52/ea)
$0.00
1/4"-28 x 2-3/4" PT
29121-02
1
$1.91 ($1.91/ea)
100
$176.00 ($1.76/ea)
1000
$1,750.00 ($1.75/ea)
$0.00
1/4"-28 x 3" PT
29122
1
$1.10 ($1.10/ea)
100
$80.00 ($0.80/ea)
1000
$700.00 ($0.70/ea)
$0.00
1/4"-28 x 3-1/2" PT
29132
1
$2.71 ($2.71/ea)
100
$231.00 ($2.31/ea)
1000
$2,030.00 ($2.03/ea)
$0.00
1/4"-28 x 4" PT
29142
1
$3.93 ($3.93/ea)
100
$296.00 ($2.96/ea)
1000
$2,600.00 ($2.60/ea)
$0.00

*Volume pricing available on select products. Products without quantity breaks are priced per unit.

Page Total: $0.00

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