Standard
AllDIN 912DIN 933DIN 7991ISO 7380DIN 916YJT 13001YB 819DIN 976-1YB 818YJT 13002DIN 913GB 901JISB 1122TDIN 6334GB 818DIN 914GB 12618DIN 967GB 873GB 9074.8GB 109GB 867GB 819GB 869DIN 551GB 835GB 70DIN 985DIN 338DIN 318GB 834GB 2673GB 5783DIN 915GB 5789GB 894.1GB 2672GB 893.1DIN 931GB 6170GB 119-76DIN 571DIN 934GB 882GB 830GB 67DIN 1587GB 798YJT 3039GB 5782GB 878GB 9074.13GB 65ISO 7380.2GB 12617DIN 6926GB 9074.17GB 91GB 29.2DIN 6923
Material
All304 Stainless Steel40Cr Alloy Steel316 Stainless SteelPA66 Nylon10B21 Carbon SteelQ235 Carbon Steel1010A Carbon SteelCarbon SteelH58 BrassABS Plastic1010 Carbon Steel1022 Carbon Steel1022A Carbon Steel65Mn Spring SteelQ195 Carbon SteelSCM435 Alloy SteelH62 BrassAluminium Alloy303 Stainless SteelT2 CopperUnspecified35K Carbon Steel5052/7A03 AluminiumA3 Carbon SteelA00 AluminiumML08AL Carbon Steel201 Stainless SteelHSS High Speed SteelH59 Brass410 Stainless SteelTC4 Titanium AlloyHSS 6542H68 BrassChrome Vanadium Steel1008A Carbon Steel1008 Carbon SteelPC (Clear)S2 Tool SteelHSS M35 Cobalt70Mn Spring SteelPE Plastic35CrMo Alloy SteelNylonSCM440 Alloy SteelPlasticCR-V Chrome Vanadium SteelEco Rubber40Cr SteelPP + Q195 SteelHigh Speed SteelImported HSS M35 CobaltH65 BrassFibre Board50Mn Spring SteelSK5 Spring Steel45# Carbon SteelZinc AlloyHSS + Alloy SteelWoodIron
Grade
Surface Finish
AllPlainBlack Oxide (Hardened)Self ColourNickel PlatedBlackBlack OxideWhiteBlue-White Zinc PlatedWhite Zinc PlatedBlack Zinc PlatedColour Zinc PlatedAnodisedElectrophoretic BlackZinc PlatedCopper PlatedBlack Nickel PlatedRedClearBlueYellowElectroplatedDacrometBrushedSandblastedFrosted Anti-SlipBlue Zinc PlatedBrass PlatedStainless Black OxideFully GroundAnti-Loosening TreatedTitanium PlatedHardened Self ColourHot Dip GalvanisedRed OxideGreyHardenedChrome PlatedYellow Zinc PlatedSelf Colour (Hardened)Acid Wash YellowGoldMatteAntique BronzeColour / Blue ZincSilverGrey PhosphateWhite DiamondGlossyAntique Green BronzeAntique Red BronzeChrome ElectroplatedMatte PolishedZinc-Nickel BlackGreenCoatedCobaltCat's EyePhosphated Black
Diameter
All0#1/85/323/161/45/163/87/161/25/8M0.911/2-131/4-201/4-28G 1"G 1-1/2G 1-1/4G 1/2G 1/4G 1/8M1M1.0NPT 1/8ST1.0M1.2ST1.2M1.3M1.4ST1.41.5M1.5Φ1.5M1.6M1.7ST1.7M1.82#2#-56G 2"M2M2.0PH2ST2Φ2M2.2M2.3ST2.3M2.42.5M2.5Φ2.5Φ2.5-M1.6Φ2.5-M2M2.6ST2.6M2.8M2.933/8-163/8-24G 3/4G 3/8M3M3.0ST3Φ3Φ3.0-M2Φ3.0-M2.53.2M3.23.43.5M3.5Φ3.5Φ3.5-M2.5M3.6M3.94#4#-40M4M4*4M4.0Φ4Φ4.0-M34.2M4.24.5M4.5M4.855/16-185/16-24M5M5.0Φ5Φ5.0-M45.2M5.25.5M5.5Φ5.56#6#-326mmM6M6*6M6-0.75M6.0T6Φ6Φ6*1.0Φ6.0-M5M6.3Φ6.3M6.46.5M6.5Φ6.5-M57M7T7Φ7*1.07.58#8#-32M8M8*7M8-1.0M8.0T8Φ8Φ8*1.0Φ8.0-M68.59M9T9Φ9*1.09.510#10#-2410#-3210-Piece Set10mmM10M10-1.0M10-1.25ST10T10Φ10Φ10*1.0Φ10-M810.51111mmM111212#-2412mmM12M12*8M12-1.0M12-1.25M12-1.5ST12Φ12Φ12-M1013-Piece SetM13Φ13-M101414mmM14M14*9M14-1.5Φ14M15T15Φ1516mmM16M16*10M16-1.5Φ16Φ16-M12M17M18Φ1819mmM19Φ1920 Series M320 Series M420 Series M520 Series M620mmM20T20Φ20Φ20-M16M2122mmM22Φ22M23M24Φ2425mmM25T25Φ25Φ25-M20M26M27T27M28Φ2830 Series M330 Series M430 Series M530 Series M630 Series M830mmM30T30Φ3032mmM32Φ32M33M3435mmM35M36M37M38M3940 Series M440 Series M540 Series M640 Series M840mmM40T40Φ40M4245 Series M1045 Series M445 Series M545 Series M645 Series M8M45M47M4850M50Φ50M52M55M56M58M60M6265M65M68M70M7275M75M78M80M85M90M95100M100M105M108M110M115M120M125M130M135M140M145150M150M160M170M180M190200M200Cobalt/Spiral FluteN/ASpiral FluteStraight Flute
Length
All1 in1 mm1-1/2 in1-1/4 in1-3/4 in1/2 in1/4 in1/8 in2 in2 mm2-1/2 in2-1/4 in2-3/4 in2.5 mm3 in3 mm3-1/2 in3-1/4 in3-3/4 in3/16 in3/4 in3/8 in3.5 mm4 in4 mm4-1/2 in5 in5 mm5-1/2 in5/16 in5/32 in5/8 in5.4 mm5.5 mm6 in6 mm6-1/2 in6.4 mm6.5 mm7 in7 mm7-1/2 in7/8 in8 in8 mm9 mm9.5 mm10 mm11 mm12 mm13 mm14 mm15 mm16 mm17 mm18 mm19 mm20 mm21 mm22 mm23 mm24 mm25 mm26 mm27 mm28 mm29 mm30 mm31 mm32 mm33 mm34 mm35 mm36 mm37 mm38 mm39 mm40 mm42 mm43 mm45 mm46 mm48 mm50 mm52 mm54 mm55 mm60 mm63 mm65 mm70 mm75 mm80 mm85 mm90 mm95 mm100 mm105 mm110 mm115 mm120 mm125 mm130 mm135 mm140 mm145 mm150 mm160 mm170 mm180 mm190 mm200 mm210 mm220 mm230 mm240 mm250 mm260 mm270 mm280 mm290 mm300 mm350 mm400 mm450 mm500 mm550 mm600 mm1000 mm
Thread
AllFull ThreadCoarse ThreadPart ThreadFine ThreadLeft Hand ThreadUNC / UNF ThreadMetricImperial (US)Aluminium / IronAll SteelBSW / BSF ThreadSerratedStandard Length, Flat HeadHalf SteelRight + Left Hand ThreadStraightMedium DutyFlatLong Ball EndFlat TypeTaperedFlat HeadFlat TailWide TypeNarrow TypeBent TypeImperial
Variant
AllKnurledStandard LengthFull ThreadDk≈8.0SerratedWeld TypeDk≈6.0Dk≈7.0ToothedDk≈5.0FlatSeamlessDk≈10Self-DrillingDk≈12MetricEuropean StandardBlue NylonBlack 304With WasherPlain ShankGreenSilverBlackGoldPurpleHex Bit (Metric)Single HoleWithout WasherDk≈11Socket TypeFine Thread Round DieDk≈4.0Royal BlueOrangeSky BlueTitanium GreyPeachWine RedBasic TypeHex Bit (Imperial)White NylonDk≈16ImperialExtendedThrough HoleWith Weld SpotSquare BuckleSingle PieceLeft Hand Round DieRound DieGB StandardSingle TubeSetType ABluePinkBlue VioletMulti-ColourRose Red
10B21 Carbon Steel Fasteners
10B21 is a boron-treated low-carbon steel used for grade 8.8 fasteners where formability matters. It hardens reliably with a small boron addition.
In stock now: 1,340 lines; covering Screws (1,252), Socket Head Screws (1,168), DIN7991 (400), ISO7380 (380), GB70 (228); priced from $0.0051 per piece. Every line is sold by the piece — one piece is a valid order.
Related values on the same axis
1008 Carbon Steel 1008A Carbon Steel 1010 Carbon Steel 1010A Carbon Steel 1022 Carbon Steel 1022A Carbon Steel 201 Stainless Steel 303 Stainless Steel 304 Stainless Steel 316 Stainless Steel
Product families covered
Screws 1,252 Socket Head Screws 1,168 DIN7991 400 ISO7380 380 GB70 228 Torx Screws 84 Screw & Washer Assemblies 78 Anchors & Fastener Assemblies 78 ISO7380 3-Piece Assemblies 78 Imperial Countersunk Hex Socket 48 Imperial Round Head Hex Socket 45 GB2672 42
Frequently asked
What is 10B21 Carbon Steel?
10B21 is a boron-treated low-carbon steel used for grade 8.8 fasteners where formability matters. It hardens reliably with a small boron addition.
How much do 10B21 Carbon Steel fasteners cost?
Prices in our catalogue for 10B21 Carbon Steel run from $0.0051 to $5.8938 per piece, depending on diameter, length and material. There is no minimum order.
Is there a minimum order quantity for 10B21 Carbon Steel?
No. Every line is sold by the piece, so you can order a single piece to check the fit and the finish before committing to a production quantity. Your order total is confirmed in the cart, before payment.
What do you stock in 10B21 Carbon Steel?
10B21 Carbon Steel Fasteners currently covers 1,340 lines across Screws, Socket Head Screws, DIN7991, ISO7380, GB70, Torx Screws. The full list of sizes, materials and finishes on this page is live — use the filters at the top to narrow it down.
How quickly do you ship 10B21 Carbon Steel fasteners, and can you send them to the EU or Russia?
In-stock lines leave our Foshan warehouse within 24–48 hours. We ship worldwide, including the EU and Russia. For the EU we are appointing a responsible person under Regulation (EU) 2023/988 (GPSR); for EAEU orders the conformity documents are handled with the importing party, who is the applicant of record. We can supply an EN 10204 3.1 mill test certificate, a full technical specification and a packing list with weights on request.
