The Best 4-40 Screw of 2020 – Reviewed and Top Rated

2,950 Reviews Scanned

Rank No. #1
4# 40 x 1/4" (1/8" to 4" Available) Pan Head Machine Screw, Phillips Drive, 304 Stainless Steel 18-8, Bright Finish, Fully Machine Thread, 100 PCS by Eastlo Fastener
  • Phillips Drive Size: #1
  • Thread Size:4# 40; Thread Type: Coarse Thread/ UNC; Thread Style: Right Hand
  • Exterior Finish: Bright Finish; Color: Silver Tone; Quantity: 100 PCS
  • HIGH QUALITY MATERIAL: 100% Stainless steel 304(18-8) which is superior to regular steel and any zinc plated fasteners, provides good strength and corrosion resistance in bad environments
  • GUARANTEE: Eastlo Fastener is sold exclusively by Eastlo online. We are so confident that we offer the best competitive products in the world. Satisfaction guaranteed. Money back or exchange
Rank No. #2
#4-40 X 2" Stainless Pan Head Phillips Machine Screw (100 pc) 18-8 (304) Stainless Steel Screw by Bolt Dropper
  • HIGH QUALITY STAINLESS: These Pan Head Screws are made of 18-8 (304) Stainless Steel which is one of the highest forms of corrosion resistant metals, making it last longer than other hardware on the market today.
  • SCREWS THAT YOU CAN DEPEND ON: Our Pan Head Machine Screws are very strong and are great for both indoor and outdoor use. This stainless is superior to regular steel and provides excellent rust resistance.
  • GREAT TO KEEP AROUND: Bolt Dropper stainless hardware is great to have around for use in wood and wet environments. Bolt Dropper hardware is the highest quality available on the market and we stand by our claim 100%. They are strong, corrosion resistant and will support all of your projects.
  • Diameter: #4 | Length: 2" | Threads per Inch: 40 | Thread Type: Coarse (standard) | Quantity: 100 pcs | Coating: Stainless Steel | Material: 18-8 -304 Stainless Steel
  • LIFETIME GUARANTEE: We are so confident that our product is the best on the market that we offer a NO HASSLE LIFETIME GUARANTEE.
Rank No. #3
Steel Thread Rolling Screw for Metal, Black Oxide Finish, 82 Degree Flat Head, Phillips Drive, #4-40 Thread Size, 3/8" Length (Pack of 100)
  • Thread rolling screw recommended for use in metal
  • Steel is often used in applications where strength is the primary consideration
  • Black oxide finish offers mild corrosion resistance and lubricity
  • Flat head has an 82-degree cone-shaped bearing surface for use in countersunk holes and a flat top that fits flush with the mated surface
  • Phillips drive has an x-shaped slot that accepts a Phillips driver and is designed to prevent over-tightening
Rank No. #4
binifiMux 160pcs #4-40 UNC Phillips Pan Head Machine Screws Hex Nuts Assortment Kit 304 Stainless Steel Silver Tone
  • ⚪Quantity: 160pcs; ⚪Material: 304 Stainless Steel ;
  • ⚪Color: Silver; ⚪Drive type: Phillips; ⚪Head Type: Round;
  • ⚪Package: 100pcs 4-40 Screws, 60 Hex Nuts in one storage Box;
  • ⚪Name: 4-40 Machine Screws and 4-40 Hex Nuts Kit;
Rank No. #6
Prime-Line 9126651 Machine Screws, Pan Head, Phillips Drive, #4-40 X 2 in, Grade 18-8 Stainless Steel, 25-Pack
  • Size: #4-40 X 2 inch
  • Pan Head, Phillips Drive
  • Use with nuts or pre-threaded holes of the same diameter & thread size
  • Often used in machinery & appliances
  • Nuts and washers not included
Rank No. #7
Steel Machine Screw, Zinc Plated Finish, Pan Head, Phillips Drive, 3/8" Length, #4-40 Threads (Pack of 100)
  • Steel is often used in applications where strength is the primary consideration
  • Zinc plating resists corrosion resistance and has a reflective appearance
  • Phillips drive has an x-shaped slot that accepts a Phillips driver and is designed to prevent over-tightening
  • Pan head has a flat top and short vertical sides with a rounded top edge
Rank No. #8
(10) #4-40 x 1/4" Flat Head Socket Cap Screws Countersunk, Alloy Steel w/Thermal Black Oxide, Inch/SAE Coarse Thread - MonsterBolts (10, 0.25 in. (1/4"))
  • Brand : MonsterBolts
  • Diameter - Thread Pitch : #4 - 40 UNC / Coarse Thread
  • Type : Flat Head Socket Cap Screw, Hex Drive
  • Material : Alloy Steel with Thermal Black Oxide
  • Specifications : ASTM F835 - Countersunk 82° Head (Standard)
Rank No. #10
Prime-Line 9177020 Socket Head Cap Screws, Hex (Allen) Drive, #4-40 X 3/4 in, Black Oxide Coated Steel, 25-Pack
  • Size: #4-40 X 3/4 inch
  • Hex (Allen) Drive
  • Installs using an Allen wrench
  • Can be used in tight spaces where there may not be room for a socket tool or wrench
  • Often used in machinery, tools & dies

Last update on 2020-05-04 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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  2. Features: What bells and whistles matter for an 4-40 Screw?
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  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their 4-40 Screw.
  7. Product Quality: You don’t always get what you pay for with an 4-40 Screw, sometimes less, and sometimes more.
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