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Flat Head Cap Screws - Coarse & Fine Alloy Black

Looking for Flat Head Cap Screws in Alloy Black?

We carry Class 3A Flat Head Cap Screws manufactured to ASME B18.3 standards.

Stock sizes include: 0-80 through 3/4-10 (Coarse Thread) & 10-32 through 1/2-20 (Fine Thread) in Alloy Steel Black Oxide.

Scroll down to find your size, or search by part number.

Add to Cart and buy online or email us for a custom quote.  Most popular products are in stock and ship within 24 hours.

Can't find what you're looking for? Email us at [email protected] for a custom quote. "We have the right screw for you" is our motto after all!
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0-80 X 3/16 Flat Head Cap Screws 0-80 X 3/16 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
4-40 X 3/8 Flat Head Cap Screws 4-40 X 3/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $36.00 / Quantity Discounts Available
4-40 X 1/2 Flat Head Cap Screws 4-40 X 1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $14.40 / Quantity Discounts Available
4-40 X 5/8 Flat Head Cap Screws 4-40 X 5/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $41.60 / Quantity Discounts Available
4-40 X 3/4 Flat Head Cap Screws 4-40 X 3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $43.84 / Quantity Discounts Available
5-40 X 1/4 Flat Head Cap Screws 5-40 X 1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $12.71 / Quantity Discounts Available
5-40 X 3/8 Flat Head Cap Screws 5-40 X 3/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $8.14 / Quantity Discounts Available
5-40 X 1/2 Flat Head Cap Screws 5-40 X 1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $8.16 / Quantity Discounts Available
5-40 X 5/8 Flat Head Cap Screws 5-40 X 5/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $11.42 / Quantity Discounts Available
5-40 X 3/4 Flat Head Cap Screws 5-40 X 3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $11.69 / Quantity Discounts Available
6-32 X 3/4 Flat Head Cap Screws 6-32 X 3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $10.05 / Quantity Discounts Available
6-32 X 1 Flat Head Cap Screws 6-32 X 1 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $11.66 / Quantity Discounts Available
8-32 X 3/8 Flat Head Cap Screws 8-32 X 3/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $16.13 / Quantity Discounts Available
8-32 X 5/8 Flat Head Cap Screws 8-32 X 5/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [1000 per Box]
Price per Box: $32.16 / Quantity Discounts Available
8-32 X 3/4 Flat Head Cap Screws 8-32 X 3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $10.48 / Quantity Discounts Available
8-32 X 1 Flat Head Cap Screws 8-32 X 1 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $20.00 / Quantity Discounts Available
10-24 X 3/8 Flat Head Cap Screws 10-24 X 3/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $13.54 / Quantity Discounts Available
10-24 X 1/2 Flat Head Cap Screws 10-24 X 1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $16.81 / Quantity Discounts Available
10-24 X 5/8 Flat Head Cap Screws 10-24 X 5/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $10.89 / Quantity Discounts Available
10-24 X 3/4 Flat Head Cap Screws 10-24 X 3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $16.22 / Quantity Discounts Available
10-24 X 1 Flat Head Cap Screws 10-24 X 1 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $57.20 / Quantity Discounts Available
10-24 X 1-1/4 Flat Head Cap Screws 10-24 X 1-1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $11.81 / Quantity Discounts Available
10-24 X 1-1/2 Flat Head Cap Screws 10-24 X 1-1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $22.92 / Quantity Discounts Available
1/4-20 X 3/8 Flat Head Cap Screws 1/4-20 X 3/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $22.76 / Quantity Discounts Available
1/4-20 X 1/2 Flat Head Cap Screws 1/4-20 X 1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $26.54 / Quantity Discounts Available
1/4-20 X 5/8 Flat Head Cap Screws 1/4-20 X 5/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $26.46 / Quantity Discounts Available
1/4-20 X 1 Flat Head Cap Screws 1/4-20 X 1 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $28.00 / Quantity Discounts Available
1/4-20 X 1-1/4 Flat Head Cap Screws 1/4-20 X 1-1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $32.64 / Quantity Discounts Available
1/4-20 X 1-1/2 Flat Head Cap Screws 1/4-20 X 1-1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $21.41 / Quantity Discounts Available
1/4-20 X 1-3/4 Flat Head Cap Screws 1/4-20 X 1-3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $39.90 / Quantity Discounts Available
1/4-20 X 2 Flat Head Cap Screws 1/4-20 X 2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $45.78 / Quantity Discounts Available
5/16-18 X 1/2 Flat Head Cap Screws 5/16-18 X 1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $36.10 / Quantity Discounts Available
5/16-18 X 5/8 Flat Head Cap Screws 5/16-18 X 5/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $57.60 / Quantity Discounts Available
5/16-18 X 3/4 Flat Head Cap Screws 5/16-18 X 3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $45.73 / Quantity Discounts Available
5/16-18 X 1 Flat Head Cap Screws 5/16-18 X 1 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $57.20 / Quantity Discounts Available
5/16-18 X 1-1/4 Flat Head Cap Screws 5/16-18 X 1-1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $63.88 / Quantity Discounts Available
5/16-18 X 1-1/2 Flat Head Cap Screws 5/16-18 X 1-1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $68.80 / Quantity Discounts Available
5/16-18 X 1-3/4 Flat Head Cap Screws 5/16-18 X 1-3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $116.80 / Quantity Discounts Available
5/16-18 X 2 Flat Head Cap Screws 5/16-18 X 2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $76.51 / Quantity Discounts Available
5/16-18 X 2-1/4 Flat Head Cap Screws 5/16-18 X 2-1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $60.03 / Quantity Discounts Available
5/16-18 X 2-1/2 Flat Head Cap Screws 5/16-18 X 2-1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $70.03 / Quantity Discounts Available
3/8-16 X 1/2 Flat Head Cap Screws 3/8-16 X 1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $42.91 / Quantity Discounts Available
3/8-16 X 5/8 Flat Head Cap Screws 3/8-16 X 5/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $55.72 / Quantity Discounts Available
3/8-16 X 3/4 Flat Head Cap Screws 3/8-16 X 3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $41.70 / Quantity Discounts Available
3/8-16 X 7/8 Flat Head Cap Screws 3/8-16 X 7/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $104.63 / Quantity Discounts Available
3/8-16 X 1 Flat Head Cap Screws 3/8-16 X 1 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $78.40 / Quantity Discounts Available
3/8-16 X 1-1/4 Flat Head Cap Screws 3/8-16 X 1-1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $87.99 / Quantity Discounts Available
3/8-16 X 1-1/2 Flat Head Cap Screws 3/8-16 X 1-1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $83.57 / Quantity Discounts Available
10-32 X 3/8 Flat Head Cap Screws 10-32 X 3/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $17.39 / Quantity Discounts Available
3/8-16 X 1-3/4 Flat Head Cap Screws 3/8-16 X 1-3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $99.83 / Quantity Discounts Available
3/8-16 X 2 Flat Head Cap Screws 3/8-16 X 2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $78.40 / Quantity Discounts Available
3/8-16 X 2-1/4 Flat Head Cap Screws 3/8-16 X 2-1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $202.96 / Quantity Discounts Available
3/8-16 X 2-1/2 Flat Head Cap Screws 3/8-16 X 2-1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [50 per Box]
Price per Box: $65.60 / Quantity Discounts Available
3/8-16 X 3 Flat Head Cap Screws 3/8-16 X 3 Flat Head Cap Screw Alloy Steel Black Oxide USA [50 per Box]
Price per Box: $54.99 / Quantity Discounts Available
10-32 X 1-1/4 Flat Head Cap Screws 10-32 X 1-1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $38.16 / Quantity Discounts Available
7/16-14 X 3/4 Flat Head Cap Screws 7/16-14 X 3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $166.64 / Quantity Discounts Available
10-32 X 1-1/2 Flat Head Cap Screws 10-32 X 1-1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $15.44 / Quantity Discounts Available
7/16-14 X 1 Flat Head Cap Screws 7/16-14 X 1 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $103.36 / Quantity Discounts Available
10-32 X 2 Flat Head Cap Screws 10-32 X 2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $44.80 / Quantity Discounts Available
7/16-14 X 1-1/4 Flat Head Cap Screws 7/16-14 X 1-1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $120.75 / Quantity Discounts Available
1/4-28 X 3/8 Flat Head Cap Screws 1/4-28 X 3/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $19.04 / Quantity Discounts Available
7/16-14 X 1-1/2 Flat Head Cap Screws 7/16-14 X 1-1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $105.51 / Quantity Discounts Available
1/2-13 X 3/4 Flat Head Cap Screws 1/2-13 X 3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $93.41 / Quantity Discounts Available
1/4-28 X 1/2 Flat Head Cap Screws 1/4-28 X 1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $20.64 / Quantity Discounts Available
1/2-13 X 1 Flat Head Cap Screws 1/2-13 X 1 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $125.56 / Quantity Discounts Available
1/4-28 X 5/8 Flat Head Cap Screws 1/4-28 X 5/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $22.75 / Quantity Discounts Available
1/2-13 X 1-1/4 Flat Head Cap Screws 1/2-13 X 1-1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $142.59 / Quantity Discounts Available
1/4-28 X 3/4 Flat Head Cap Screws 1/4-28 X 3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $20.18 / Quantity Discounts Available
1/2-13 X 1-1/2 Flat Head Cap Screws 1/2-13 X 1-1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $154.93 / Quantity Discounts Available
1/4-28 X 7/8 Flat Head Cap Screws 1/4-28 X 7/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $37.64 / Quantity Discounts Available
1/2-13 X 1-3/4 Flat Head Cap Screws 1/2-13 X 1-3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [50 per Box]
Price per Box: $79.00 / Quantity Discounts Available
1/4-28 X 1 Flat Head Cap Screws 1/4-28 X 1 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $31.84 / Quantity Discounts Available
1/2-13 X 2 Flat Head Cap Screws 1/2-13 X 2 Flat Head Cap Screw Alloy Steel Black Oxide USA [50 per Box]
Price per Box: $161.94 / Quantity Discounts Available
1/4-28 X 1-1/4 Flat Head Cap Screws 1/4-28 X 1-1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $24.08 / Quantity Discounts Available
1/2-13 X 2-1/4 Flat Head Cap Screws 1/2-13 X 2-1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [50 per Box]
Price per Box: $109.80 / Quantity Discounts Available
1/4-28 X 1-1/2 Flat Head Cap Screws 1/4-28 X 1-1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $21.24 / Quantity Discounts Available
1/2-13 X 2-1/2 Flat Head Cap Screws 1/2-13 X 2-1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [50 per Box]
Price per Box: $109.51 / Quantity Discounts Available
5/16-24 X 1/2 Flat Head Cap Screws 5/16-24 X 1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $21.64 / Quantity Discounts Available
1/2-13 X 3 Flat Head Cap Screws 1/2-13 X 3 Flat Head Cap Screw Alloy Steel Black Oxide USA [50 per Box]
Price per Box: $100.00 / Quantity Discounts Available
5/16-24 X 5/8 Flat Head Cap Screws 5/16-24 X 5/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $58.40 / Quantity Discounts Available
1/2-13 X 5 Flat Head Cap Screws 1/2-13 X 5 Flat Head Cap Screw Alloy Steel Black Oxide USA [25 per Box]
Price per Box: $107.92
5/16-24 X 3/4 Flat Head Cap Screws 5/16-24 X 3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $36.80 / Quantity Discounts Available
5/16-24 X 1 Flat Head Cap Screws 5/16-24 X 1 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $52.49 / Quantity Discounts Available
5/8-11 X 1-1/4 Flat Head Cap Screws 5/8-11 X 1-1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [50 per Box]
Price per Box: $110.35 / Quantity Discounts Available
5/16-24 X 1-1/4 Flat Head Cap Screws 5/16-24 X 1-1/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $60.58 / Quantity Discounts Available
5/8-11 X 1-1/2 Flat Head Cap Screws 5/8-11 X 1-1/2 Flat Head Cap Screw Alloy Steel Black Oxide USA [50 per Box]
Price per Box: $87.38 / Quantity Discounts Available
3/8-24 X 5/8 Flat Head Cap Screws 3/8-24 X 5/8 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $69.85 / Quantity Discounts Available
5/8-11 X 1-3/4 Flat Head Cap Screws 5/8-11 X 1-3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [50 per Box]
Price per Box: $145.76 / Quantity Discounts Available
3/8-24 X 3/4 Flat Head Cap Screws 3/8-24 X 3/4 Flat Head Cap Screw Alloy Steel Black Oxide USA [100 per Box]
Price per Box: $42.13 / Quantity Discounts Available
5/8-11 X 2 Flat Head Cap Screws 5/8-11 X 2 Flat Head Cap Screw Alloy Steel Black Oxide USA [50 per Box]
Price per Box: $121.80 / Quantity Discounts Available
   
 
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