Alloy Steel Hex Drive Flat Head Screws

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Alloy Steel Hex Drive Flat Head Screws

Alloy Steel Hex Drive Flat Head Screws are precision-engineered for applications requiring a smooth, flush finish. Manufactured from premium materials and treated for enhanced durability, these fasteners provide exceptional structural integrity. Ideal for machinery, electronics, and construction, they ensure long-term reliability in demanding environments.

System of Measurement
Inch Metric
Specifications Met
ASME B18.3 ASTM F835 ASTM F835, MS24667-1 ASTM F835, MS24667-10 ASTM F835, MS24667-11 ASTM F835, MS24667-13 ASTM F835, MS24667-14 ASTM F835, MS24667-15 ASTM F835, MS24667-2 ASTM F835, MS24667-29 ASTM F835, MS24667-3 ASTM F835, MS24667-30 ASTM F835, MS24667-31 ASTM F835, MS24667-41 ASTM F835, MS24667-5 ASTM F835, MS24667-52 ASTM F835, MS24667-8 ASTM F835, MS24667-9 DIN 7991 DIN 7991, ISO 10642
Thread Size
0-80 1-64 1-72 2-56 2-64 3-48 3-56 4-40 4-48 5-40 5-44 6-32 6-40 8-32 8-36 10-24 10-32 12-24 1/4"-20 1/4"-28 5/16"-18 5/16"-24 3/8"-16 3/8"-24 7/16"-14 7/16"-20 1/2"-13 1/2"-20 5/8"-11 5/8"-18 3/4"-10 3/4"-16 7/8"-14 7/8"-9 1"-14 1"-8 1 1/8"-7 1 1/4"-12 1 1/4"-7 1 1/2"-6 M2 M2.5 M3 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 M24 M30
Length
1/8" 5/32" 3/16" 1/4" 5/16" 3/8" 7/16" 1/2" 9/16" 5/8" 3/4" 7/8" 1" 1 1/8" 1 1/4" 1 3/8" 1 1/2" 1 5/8" 1 3/4" 2" 2 1/4" 2 1/2" 2 3/4" 3" 3 1/4" 3 1/2" 3 3/4" 4" 4 1/2" 5" 5 1/2" 6" 6 1/2" 7" 8" 9" 10" 11" 11 1/2" 12" 14" 4 mm 5 mm 6 mm 8 mm 10 mm 12 mm 14 mm 16 mm 18 mm 20 mm 22 mm 25 mm 30 mm 35 mm 40 mm 45 mm 50 mm 55 mm 60 mm 65 mm 70 mm 75 mm 80 mm 90 mm 100 mm 110 mm 120 mm 130 mm 140 mm 160 mm
Material
Alloy Steel Black-Oxide Alloy Steel Blue-Dyed Zinc-Plated Alloy Steel Cadmium-Plated Alloy Steel Zinc-Plated Alloy Steel
Threading
Fully Threaded Partially Threaded
Head Diameter
0.138" 0.168" 0.187" 0.197" 0.226" 0.255" 0.262" 0.281" 0.307" 0.312" 0.359" 0.362" 0.411" 0.422" 0.438" 0.477" 0.531" 0.656" 0.717" 0.781" 0.844" 0.938" 1.188" 1.438" 1.688" 1.938" 2.188" 2.438" 2.938" 4 mm 5 mm 6 mm 8 mm 10 mm 12 mm 16 mm 20 mm 24 mm 27 mm 30 mm 33 mm 36 mm 39 mm 49 mm
Head Height
0.031" 0.042" 0.044" 0.047" 0.053" 0.054" 0.059" 0.064" 0.07" 0.073" 0.078" 0.081" 0.083" 0.09" 0.097" 0.099" 0.107" 0.112" 0.127" 0.134" 0.135" 0.161" 0.198" 0.234" 0.251" 0.324" 0.396" 0.468" 0.54" 0.611" 0.683" 0.827" 1.2 mm 1.5 mm 1.7 mm 2.3 mm 2.8 mm 3.3 mm 4.4 mm 5.5 mm 6.5 mm 7 mm 7.5 mm 8 mm 8.5 mm 14 mm 19.6 mm
Thread Pitch
0.4 mm 0.45 mm 0.5 mm 0.7 mm 0.8 mm 1 mm 1.25 mm 1.5 mm 1.75 mm 2 mm 2.5 mm 3 mm 3.5 mm
Thread Diameter
0.06" 0.073" 0.086" 0.099" 0.112" 0.125" 0.138" 0.164" 0.19" 0.216" 0.25" 0.313" 0.375" 0.438" 0.5" 0.625" 0.75" 0.875" 1" 1.125" 1.25" 1.5"
Thread Type
Metric UNC UNF UNS
Fastener Strength Grade/Class
Class 10.9 Class 12.9
Drive Size
0.035" 0.050" 1 mm 1" 1.3 mm 1.5 mm 1/16" 1/2" 1/4" 1/8" 10 mm 12 mm 14 mm 19 mm 2 mm 2.5 mm 3 mm 3/16" 3/32" 3/4" 3/8" 4 mm 5 mm 5/16" 5/32" 5/64" 5/8" 6 mm 7/32" 7/8" 8 mm 9/16"
Tensile Strength
120000 psi 130000 psi 140000 psi 170000 psi
Show more▼
Part Number Thread Size Length Threading Specifications Met Thread Type Head Diameter Head Height Material Tensile Strength Hardness
0309FA00304 1/4"-20 3" Partially Threaded ASTM F835 UNC 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00584 1/4"-20 3" Partially Threaded ASTM F835 UNC 0.531" 0.161" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00305 1/4"-20 3 1/4" Partially Threaded ASTM F835 UNC 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00496 1/4"-20 3 1/2" Partially Threaded ASME B18.3 UNC 0.531" 0.161" Zinc-Plated Alloy Steel 120000 psi Rockwell C32
0309FA00306 1/4"-20 3 1/2" Partially Threaded ASTM F835 UNC 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00497 1/4"-20 4" Partially Threaded ASME B18.3 UNC 0.531" 0.161" Zinc-Plated Alloy Steel 120000 psi Rockwell C32
0309FA00307 1/4"-20 4" Partially Threaded ASTM F835 UNC 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00284 1/4"-20 5" Partially Threaded ASTM F835 UNC 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00285 1/4"-20 6" Partially Threaded ASTM F835 UNC 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00214 1/4"-28 1/4" Fully Threaded ASTM F835 UNF 0.477" 0.107" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00216 1/4"-28 5/16" Fully Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00211 1/4"-28 3/8" Fully Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00615 1/4"-28 3/8" Fully Threaded ASTM F835 UNF 0.531" 0.161" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00218 1/4"-28 7/16" Fully Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00213 1/4"-28 1/2" Fully Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00520 1/4"-28 1/2" Fully Threaded ASTM F835 UNF 0.531" 0.161" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00220 1/4"-28 9/16" Fully Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00215 1/4"-28 5/8" Fully Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00616 1/4"-28 5/8" Fully Threaded ASTM F835 UNF 0.531" 0.161" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00217 1/4"-28 3/4" Fully Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00521 1/4"-28 3/4" Fully Threaded ASTM F835 UNF 0.531" 0.161" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00212 1/4"-28 7/8" Fully Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00219 1/4"-28 1" Fully Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00522 1/4"-28 1" Fully Threaded ASTM F835 UNF 0.531" 0.161" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00222 1/4"-28 1 1/8" Fully Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00498 1/4"-28 1 1/4" Fully Threaded ASME B18.3 UNF 0.531" 0.161" Zinc-Plated Alloy Steel 120000 psi Rockwell C32
0309FA00221 1/4"-28 1 1/4" Fully Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00224 1/4"-28 1 3/8" Fully Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00223 1/4"-28 1 1/2" Fully Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00225 1/4"-28 1 3/4" Partially Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00226 1/4"-28 2" Partially Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00227 1/4"-28 2 1/4" Partially Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00228 1/4"-28 2 1/2" Partially Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00229 1/4"-28 2 3/4" Partially Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00230 1/4"-28 3" Partially Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00018 1/4"-28 3 1/2" Partially Threaded ASTM F835 UNF 0.531" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00308 5/16"-18 3/8" Fully Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00617 5/16"-18 3/8" Fully Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00309 5/16"-18 1/2" Fully Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00585 5/16"-18 1/2" Fully Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00310 5/16"-18 5/8" Fully Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00618 5/16"-18 5/8" Fully Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00311 5/16"-18 3/4" Fully Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00586 5/16"-18 3/4" Fully Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00312 5/16"-18 7/8" Fully Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00587 5/16"-18 7/8" Fully Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00313 5/16"-18 1" Fully Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00588 5/16"-18 1" Fully Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0311FA00013 5/16"-18 1" Fully Threaded ASTM F835, MS24667-41 UNC 0.656" 0.198" Cadmium-Plated Alloy Steel 140000 psi Rockwell C39
0309FA00460 5/16"-18 1 1/8" Fully Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00314 5/16"-18 1 1/4" Fully Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00619 5/16"-18 1 1/4" Fully Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00461 5/16"-18 1 3/8" Fully Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00315 5/16"-18 1 1/2" Fully Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00589 5/16"-18 1 1/2" Fully Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00316 5/16"-18 1 3/4" Fully Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00620 5/16"-18 1 3/4" Fully Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00317 5/16"-18 2" Partially Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00590 5/16"-18 2" Partially Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00318 5/16"-18 2 1/4" Partially Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00319 5/16"-18 2 1/2" Partially Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00591 5/16"-18 2 1/2" Partially Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00320 5/16"-18 2 3/4" Partially Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00321 5/16"-18 3" Partially Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00621 5/16"-18 3" Partially Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00323 5/16"-18 3 1/4" Partially Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00324 5/16"-18 3 1/2" Partially Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00499 5/16"-18 3 1/2" Partially Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00325 5/16"-18 4" Partially Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00500 5/16"-18 4" Partially Threaded ASTM F835 UNC 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00286 5/16"-18 5" Partially Threaded ASTM F835 UNC 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00231 5/16"-24 3/8" Fully Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00232 5/16"-24 1/2" Fully Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00622 5/16"-24 1/2" Fully Threaded ASTM F835 UNF 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00233 5/16"-24 5/8" Fully Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00234 5/16"-24 3/4" Fully Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00523 5/16"-24 3/4" Fully Threaded ASTM F835 UNF 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00235 5/16"-24 7/8" Fully Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00236 5/16"-24 1" Fully Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00524 5/16"-24 1" Fully Threaded ASTM F835 UNF 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00462 5/16"-24 1 1/8" Fully Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00501 5/16"-24 1 1/4" Fully Threaded ASME B18.3 UNF 0.656" 0.198" Zinc-Plated Alloy Steel 120000 psi Rockwell C32
0309FA00237 5/16"-24 1 1/4" Fully Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00238 5/16"-24 1 1/2" Fully Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00623 5/16"-24 1 1/2" Fully Threaded ASTM F835 UNF 0.656" 0.198" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00239 5/16"-24 1 3/4" Fully Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00249 5/16"-24 2" Partially Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00251 5/16"-24 2 1/4" Partially Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00254 5/16"-24 2 1/2" Partially Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00255 5/16"-24 3" Partially Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00019 5/16"-24 3 1/2" Partially Threaded ASTM F835 UNF 0.656" 0.198" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00240 3/8"-16 3/8" Fully Threaded ASTM F835 UNC 0.717" 0.161" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00326 3/8"-16 1/2" Fully Threaded ASTM F835 UNC 0.781" 0.234" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00592 3/8"-16 1/2" Fully Threaded ASTM F835 UNC 0.781" 0.234" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00327 3/8"-16 5/8" Fully Threaded ASTM F835 UNC 0.781" 0.234" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00593 3/8"-16 5/8" Fully Threaded ASTM F835 UNC 0.781" 0.234" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00328 3/8"-16 3/4" Fully Threaded ASTM F835 UNC 0.781" 0.234" Black-Oxide Alloy Steel 130000 psi Rockwell C39
0309FA00594 3/8"-16 3/4" Fully Threaded ASTM F835 UNC 0.781" 0.234" Zinc-Plated Alloy Steel 130000 psi Rockwell C39
0309FA00502 3/8"-16 7/8" Fully Threaded ASME B18.3 UNC 0.781" 0.234" Zinc-Plated Alloy Steel 120000 psi Rockwell C32
0309FA00329 3/8"-16 7/8" Fully Threaded ASTM F835 UNC 0.781" 0.234" Black-Oxide Alloy Steel 130000 psi Rockwell C39
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