NVS AISI 304 (A2-70) Stainless Steel Countersunk Socket Head Screw DIN 7991
AISI 304 (1.4301) · Countersunk head, hexagon socket drive, metric thread · DIN 7991 · ISO 10642 · M3–M24 · 5–150 mm · 153 sizes
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1,53₺ incl. VAT
excl. VAT: 1,28₺
Category
Stock Code
NVS-BE-HAVSA7991-304
Warranty Period
24 Month
Price
1,28 ₺ + VAT
NVS AISI 304 (A2-70) Stainless Steel Countersunk Socket Head Screw DIN 7991
NVS AISI 304 (A2-70) stainless steel countersunk socket head screw: countersunk head, hexagon socket drive, metric thread. Size range: M3–M24 · 5–150 mm (153 sizes). This screw has a conical countersunk head with a hexagon socket. The head sits in a countersunk hole flush with the surface, so it is used on flat surfaces where no protrusion is wanted.
AISI 304 (1.4301) is a general-purpose chromium-nickel stainless steel. It is widely used in water, heating and cooling, compressed air, food processing and indoor and outdoor applications.
Applications
- Panel and cover joints where the head must not protrude
- Food and kitchen equipment
- Machinery, automotive and decorative applications
Size, weight and item code table
| Thread | Length | Weight | Item code |
|---|---|---|---|
| M3 | 5 mm | ≈ 0.35 g | NVS7991A235 |
| M3 | 6 mm | ≈ 0.41 g | NVS7991A236 |
| M3 | 8 mm | ≈ 0.47 g | NVS7991A238 |
| M3 | 10 mm | ≈ 0.57 g | NVS7991A2310 |
| M3 | 12 mm | ≈ 0.66 g | NVS7991A2312 |
| M3 | 16 mm | ≈ 0.84 g | NVS7991A2316 |
| M3 | 20 mm | ≈ 1 g | NVS7991A2320 |
| M3 | 25 mm | ≈ 1.4 g | NVS7991A2325 |
| M3 | 30 mm | ≈ 1.6 g | NVS7991A2330 |
| M3 | 35 mm | ≈ 1.9 g | NVS7991A2335 |
| M3 | 40 mm | ≈ 2.2 g | NVS7991A2340 |
| M3 | 45 mm | ≈ 2.2 g | NVS7991A2345 |
| M3 | 50 mm | ≈ 2.4 g | NVS7991A2350 |
| M4 | 6 mm | ≈ 0.78 g | NVS7991A246 |
| M4 | 8 mm | ≈ 0.93 g | NVS7991A248 |
| M4 | 10 mm | ≈ 1.1 g | NVS7991A2410 |
| M4 | 12 mm | ≈ 1.2 g | NVS7991A2412 |
| M4 | 16 mm | ≈ 1.6 g | NVS7991A2416 |
| M4 | 20 mm | ≈ 1.9 g | NVS7991A2420 |
| M4 | 25 mm | ≈ 2.2 g | NVS7991A2425 |
| M4 | 30 mm | ≈ 2.9 g | NVS7991A2430 |
| M4 | 35 mm | ≈ 3.4 g | NVS7991A2435 |
| M4 | 40 mm | ≈ 3.9 g | NVS7991A2440 |
| M4 | 45 mm | ≈ 4.4 g | NVS7991A2445 |
| M4 | 50 mm | ≈ 5.5 g | NVS7991A2450 |
| M4 | 60 mm | ≈ 6.5 g | NVS7991A2460 |
| M5 | 6 mm | ≈ 1.4 g | NVS7991A256 |
| M5 | 8 mm | ≈ 1.6 g | NVS7991A258 |
| M5 | 10 mm | ≈ 1.9 g | NVS7991A2510 |
| M5 | 12 mm | ≈ 2.1 g | NVS7991A2512 |
| M5 | 16 mm | ≈ 2.6 g | NVS7991A2516 |
| M5 | 20 mm | ≈ 3.1 g | NVS7991A2520 |
| M5 | 25 mm | ≈ 3.8 g | NVS7991A2525 |
| M5 | 30 mm | ≈ 4.4 g | NVS7991A2530 |
| M5 | 35 mm | ≈ 5.5 g | NVS7991A2535 |
| M5 | 40 mm | ≈ 6.3 g | NVS7991A2540 |
| M5 | 45 mm | ≈ 7 g | NVS7991A2545 |
| M5 | 50 mm | ≈ 7.8 g | NVS7991A2550 |
| M5 | 60 mm | ≈ 9.4 g | NVS7991A2560 |
| M5 | 70 mm | ≈ 9.7 g | NVS7991A2570 |
| M5 | 80 mm | ≈ 11 g | NVS7991A2580 |
| M6 | 8 mm | ≈ 2.4 g | NVS7991A268 |
| M6 | 10 mm | ≈ 2.7 g | NVS7991A2610-M6 |
| M6 | 12 mm | ≈ 3.1 g | NVS7991A2612 |
| M6 | 16 mm | ≈ 3.8 g | NVS7991A2616 |
| M6 | 20 mm | ≈ 4.5 g | NVS7991A2620 |
| M6 | 25 mm | ≈ 5.4 g | NVS7991A2625 |
| M6 | 30 mm | ≈ 6.3 g | NVS7991A2630 |
| M6 | 35 mm | ≈ 7.2 g | NVS7991A2635 |
| M6 | 40 mm | ≈ 8.9 g | NVS7991A2640 |
| M6 | 45 mm | ≈ 10 g | NVS7991A2645 |
| M6 | 50 mm | ≈ 11 g | NVS7991A2650 |
| M6 | 60 mm | ≈ 13 g | NVS7991A2660 |
| M6 | 70 mm | ≈ 16 g | NVS7991A2670 |
| M6 | 80 mm | ≈ 18 g | NVS7991A2680 |
| M6 | 90 mm | ≈ 20 g | NVS7991A2690 |
| M6 | 100 mm | ≈ 22 g | NVS7991A26100 |
| M8 | 10 mm | ≈ 5.5 g | NVS7991A2610-M8 |
| M8 | 12 mm | ≈ 6.2 g | NVS7991A2812 |
| M8 | 16 mm | ≈ 7.4 g | NVS7991A2816 |
| M8 | 20 mm | ≈ 8.7 g | NVS7991A2820 |
| M8 | 25 mm | ≈ 10 g | NVS7991A2825 |
| M8 | 30 mm | ≈ 12 g | NVS7991A2830 |
| M8 | 35 mm | ≈ 13 g | NVS7991A2835 |
| M8 | 40 mm | ≈ 15 g | NVS7991A2840 |
| M8 | 45 mm | ≈ 17 g | NVS7991A2845 |
| M8 | 50 mm | ≈ 20 g | NVS7991A2850 |
| M8 | 60 mm | ≈ 25 g | NVS7991A2860 |
| M8 | 70 mm | ≈ 30 g | NVS7991A2870 |
| M8 | 80 mm | ≈ 35 g | NVS7991A2880 |
| M8 | 90 mm | ≈ 40 g | NVS7991A2890 |
| M8 | 100 mm | ≈ 45 g | NVS7991A28100 |
| M8 | 110 mm | ≈ 39 g | NVS7991A28110 |
| M8 | 120 mm | ≈ 42 g | NVS7991A28120 |
| M8 | 130 mm | ≈ 46 g | NVS7991A28130 |
| M8 | 140 mm | ≈ 49 g | NVS7991A28140 |
| M8 | 150 mm | ≈ 52 g | NVS7991A28150 |
| M10 | 16 mm | ≈ 12 g | NVS7991A21016 |
| M10 | 20 mm | ≈ 14 g | NVS7991A21020 |
| M10 | 25 mm | ≈ 17 g | NVS7991A21025 |
| M10 | 30 mm | ≈ 19 g | NVS7991A21030 |
| M10 | 35 mm | ≈ 22 g | NVS7991A21035 |
| M10 | 40 mm | ≈ 24 g | NVS7991A21040 |
| M10 | 45 mm | ≈ 27 g | NVS7991A21045 |
| M10 | 50 mm | ≈ 30 g | NVS7991A21050 |
| M10 | 60 mm | ≈ 36 g | NVS7991A21060 |
| M10 | 70 mm | ≈ 42 g | NVS7991A21070 |
| M10 | 80 mm | ≈ 47 g | NVS7991A21080 |
| M10 | 90 mm | ≈ 53 g | NVS7991A21090 |
| M10 | 100 mm | ≈ 58 g | NVS7991A210100 |
| M10 | 110 mm | ≈ 62 g | NVS7991A210110 |
| M10 | 120 mm | ≈ 68 g | NVS7991A210120 |
| M10 | 130 mm | ≈ 73 g | NVS7991A210130 |
| M10 | 140 mm | ≈ 78 g | NVS7991A210140 |
| M10 | 150 mm | ≈ 84 g | NVS7991A210150 |
| M12 | 16 mm | ≈ 18 g | NVS7991A21216 |
| M12 | 20 mm | ≈ 21 g | NVS7991A21220 |
| M12 | 25 mm | ≈ 25 g | NVS7991A21225 |
| M12 | 30 mm | ≈ 29 g | NVS7991A21230 |
| M12 | 35 mm | ≈ 32 g | NVS7991A21235 |
| M12 | 40 mm | ≈ 36 g | NVS7991A21240 |
| M12 | 45 mm | ≈ 40 g | NVS7991A21245 |
| M12 | 50 mm | ≈ 43 g | NVS7991A21250 |
| M12 | 60 mm | ≈ 55 g | NVS7991A21260 |
| M12 | 70 mm | ≈ 64 g | NVS7991A21270 |
| M12 | 80 mm | ≈ 72 g | NVS7991A21280 |
| M12 | 90 mm | ≈ 82 g | NVS7991A21290 |
| M12 | 100 mm | ≈ 90 g | NVS7991A212100 |
| M12 | 110 mm | ≈ 100 g | NVS7991A212110 |
| M12 | 120 mm | ≈ 109 g | NVS7991A212120 |
| M12 | 130 mm | ≈ 118 g | NVS7991A212130 |
| M12 | 140 mm | ≈ 127 g | NVS7991A212140 |
| M12 | 150 mm | ≈ 136 g | NVS7991A212150 |
| M16 | 25 mm | ≈ 46 g | NVS7991A21625 |
| M16 | 30 mm | ≈ 52 g | NVS7991A21630 |
| M16 | 35 mm | ≈ 59 g | NVS7991A21635 |
| M16 | 40 mm | ≈ 66 g | NVS7991A21540 |
| M16 | 45 mm | ≈ 72 g | NVS7991A21645 |
| M16 | 50 mm | ≈ 79 g | NVS7991A21650 |
| M16 | 60 mm | ≈ 93 g | NVS7991A21660 |
| M16 | 70 mm | ≈ 112 g | NVS7991A21670 |
| M16 | 80 mm | ≈ 128 g | NVS7991A21680 |
| M16 | 90 mm | ≈ 144 g | NVS7991A21690 |
| M16 | 100 mm | ≈ 161 g | NVS7991A216100 |
| M16 | 110 mm | ≈ 177 g | NVS7991A216110 |
| M16 | 120 mm | ≈ 193 g | NVS7991A216120 |
| M16 | 130 mm | ≈ 209 g | NVS7991A216130 |
| M16 | 140 mm | ≈ 225 g | NVS7991A216140 |
| M16 | 150 mm | ≈ 241 g | NVS7991A216150 |
| M20 | 40 mm | ≈ 103 g | NVS7991A22040 |
| M20 | 45 mm | ≈ 114 g | NVS7991A22045 |
| M20 | 50 mm | ≈ 124 g | NVS7991A22050 |
| M20 | 60 mm | ≈ 144 g | NVS7991A22060 |
| M20 | 70 mm | ≈ 166 g | NVS7991A22070 |
| M20 | 80 mm | ≈ 202 g | NVS7991A22080 |
| M20 | 90 mm | ≈ 228 g | NVS7991A22090 |
| M20 | 100 mm | ≈ 256 g | NVS7991A220100 |
| M20 | 110 mm | ≈ 281 g | NVS7991A220110 |
| M20 | 120 mm | ≈ 306 g | NVS7991A220120 |
| M20 | 130 mm | ≈ 331 g | NVS7991A220130 |
| M20 | 140 mm | ≈ 357 g | NVS7991A220140 |
| M20 | 150 mm | ≈ 382 g | NVS7991A220150 |
| M24 | 50 mm | ≈ 181 g | NVS7991A22450 |
| M24 | 60 mm | ≈ 211 g | NVS7991A22460 |
| M24 | 70 mm | ≈ 241 g | NVS7991A22470 |
| M24 | 80 mm | ≈ 272 g | NVS7991A22480 |
| M24 | 90 mm | ≈ 302 g | NVS7991A22490 |
| M24 | 100 mm | ≈ 343 g | NVS7991A224100 |
| M24 | 110 mm | – | NVS7991A224110 |
| M24 | 120 mm | – | NVS7991A224120 |
| M24 | 130 mm | – | NVS7991A224130 |
| M24 | 140 mm | – | NVS7991A224140 |
| M24 | 150 mm | – | NVS7991A224150 |
Dimensions are in millimeters. Weights are approximate unit weights; values marked “≈” are theoretical, calculated from standard dimensions. Minor variations between production batches are possible.
Technical specifications
| Specification | Value |
|---|---|
| Material | AISI 304 stainless steel |
| Material number | 1.4301 · X5CrNi18-10 |
| Design | Countersunk head, hexagon socket drive, metric thread |
| Standard | DIN 7991 · ISO 10642 |
| Property class | A2-70 (ISO 3506-1) |
| Head type | Countersunk head, hexagon socket |
| Thread | Metric thread |
| Size range | M3–M24 · 5–150 mm |
| Number of sizes | 153 |
| Brand | NVS |
Selection and installation notes
- The countersink in the hole must match the screw head in angle and depth; if it is too shallow the head protrudes, and if it is too deep the seating is weakened.
- Stainless steel threads can gall (cold weld); lubricate the thread and tighten at low speed.
- A2 (304) suits fresh water, indoor and food environments; choose A4 (316) for sea water, chlorine and acidic environments.
- Direct contact between stainless steel and galvanized or carbon steel can cause galvanic corrosion; use insulation (washers, unions) between different metals.
For size selection, project lists and volume pricing, contact Novus Energy on WhatsApp +90 555 005 99 84 or at bilgi@novus.tr.
This item is also available in AISI 316 grade. See the full range in Stainless Steel Bolts.
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