--- title: "Carbon Steel Hex Socket Allen Square Flat Head Machine Screw" description: "Carbon Steel Hex Socket Allen Square Flat Head Machine Screw — Socket Head Cap & Allen Screws. MOQ 5,000 pieces, US$0.024 – 0.0312." url: https://engineeringhardware.com/product/carbon-steel-hex-socket-allen-square-flat-head-machine-screw/ source: Engineering Hardware & Fasteners --- # Carbon Steel Hex Socket Allen Square Flat Head Machine Screw [![Carbon Steel Hex Socket Allen Square Flat Head Machine Screw](https://img.engineeringhardware.com/Carbon-Steel-Hex-Socket-Allen-Square-Flat-Head-Machine-Screw.webp)](https://img.engineeringhardware.com/Carbon-Steel-Hex-Socket-Allen-Square-Flat-Head-Machine-Screw.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Screws › Socket Head Cap & Allen Screws](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/carbon-steel-hex-socket-allen-square-flat-head-machine-screw.md) Model no. **CC-684A** | **US$0.0312**5,000–9,999 pieces | **US$0.0276**10,000–99,999 pieces | **US$0.024**100,000+ pieces | | --- | --- | --- | MOQ 5,000 pieces · Final price confirmed in your quote - **Material:** Carbon Steel - **Head Style:** Round - **Standard:** DIN, GB, ANSI, JIS - **Grade:** 8.8 - **Custom:** Yes - **Screw Diameter:** 5 mm - **Screw Length:** 3~110 mm Available - **Package Size:** 27.00cm * 20.00cm * 16.00cm Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Carbon%20Steel%20Hex%20Socket%20Allen%20Square%20Flat%20Head%20Machine%20Screw%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fcarbon-steel-hex-socket-allen-square-flat-head-machine-screw%2F) Specifications are as listed for this product. Engineering Hardware & Fasteners confirms ratings, mating parts, compatibility, packing and lead time with you before you order. ## Specifications | Customization | Available | | --- | --- | | Material | Carbon Steel | | Type | Square Head | | Model NO. | CC-684A | | Groove | Cross | | Connection | Common Bolt | | Head Style | Round | | Standard | DIN, GB, ANSI, JIS | | Grade | 8.8 | | Custom | Yes | | Mode of Action | Hand Twist | | Screw Diameter | 5 mm | | Management System | ISO 9001, ISO 14001 | | Screw Length | 3~110 mm Available | | Transport Package | General Export Package/Require to Customer | | Specification | M2-M16 | | Origin | China | | HS Code | 7318150000 | | Production Capacity | 800 Tons/Month | | Package Size | 27.00cm * 20.00cm * 16.00cm | | Package Gross Weight | 20.000kg | | Packaging | boxes, cartons or plastic bags, or according to customer needs. | | Category | [Socket Head Cap & Allen Screws](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) | ## Technical parameters | Category | Mechanical screws | Head type | Flat head | | --- | --- | --- | --- | | Slot Type | Hex socket(Allen) | Screw diameter | 5 mm | | Screw length | 3~110 mm (available) | Mode of action | Hand Twist | | Thread size | M5 | Thread Tolerance | 6G | | Nominal length | 110 mm | Surface treatment | Galvanized | | Material Grade | Carbon Steel 45H | Product Grade | Class A | | Customization | Yes | Material | Heat treatment | | Screw international standard | | | | | | --- | --- | --- | --- | --- | | ITEM | DIN-STANDARD | ISO-STANDARD | GB-STANDARD | DESCRIPTION IN ENGLISH | | 1 | DIN1 | ISO2339 | GB117 | taper pins | | 2 | DIN7 | ISO2338 | GB119-86 | parallel pins | | 3 | DIN84 | ISO1207 | GB65-85 | slotted cheese head screws | | 4 | DIN85 | ISO1580 | GB67-85 | slotted pan head screws | | 5 | DIN93 | | GB854 | tab washers | | 6 | DIN94 | ISO1234 | GB91 | split cotter pins | | 7 | DIN95 | | GB101 | slotted raised csk head wood screws | | 8 | DIN96 | | GB99 | slotted round head wood screws | | 9 | DIN97 | | GB100 | slotted countersunk head wood screws | | 10 | DIN125-A | ISO708 | GB97.1-85 | plain washers | | 11 | DIN125-B | ISO7090 | GB97.2-85 | mediun washers | | 12 | DIN126 | ISO7091 | | plain washers | | 13 | DIN127-A | | GB7244 | spring lock washers,tang ends | | 14 | DIN127-B | | GB93-87 | spring lock washers,square ends | | 15 | DIN128-A | | GB7245-87 | single coil spring lock washers | | 16 | DIN137-A | | | curved spring washers | | 17 | DIN137-B | | GB955 | wave spring washers | | 18 | DIN186 | | GB37-88 | t-head bolts with square neck | | 19 | DIN188 | | | t-head bols with double nip | | 20 | DIN258 | ISO8737 | | taper pins with threaded end | | 21 | DIN261 | | | t-head bolts | | 22 | DIN315AF | | | wing nuts amercia form | | 23 | DIN315DF | | GB62-88 | wing nuts germany form | | 24 | DIN316AF | | | wing screws amercia form | | 25 | DIN317DF | | | wing screws germany form | | 26 | DIN3179 | | | ball knobs | | 27 | DIN404 | | GB832-88 | slotted capstan screws | | 28 | DIN417 | ISO7435 | GB75-85 | soltted set screws with full dog point | | 29 | DIN427 | ISO2342 | GB73-85 | slotted set screws with chamfered end | | 30 | DIN431 | | GB808-88 | pipe nuts with thread | | 31 | DIN432 | | GB856-88 | external tap | | 32 | DIN433 | ISO7092 | GB848-95 | washers for cheese head screws | | 33 | DIN434 | | GB852-88 | square taper washers for u-sections | | 34 | DIN435 | | GB852-88 | square taper washers for i-sections | | 35 | DIN436 | | | square washers | | 36 | DIN438 | ISO7436 | GB74-85 | soltted set with cup point | | 37 | DIN439 | ISO4035 | GB6172-86 | hexagon thin nuts | | 38 | DIN439 | ISO8675 | GB6173-86 | hexagon thin nuts | | 39 | DIN440 | ISO7094 | | rounds washers for wood constructions | | 40 | DIN443 | | | sealing cap, push-in type | | 41 | DIN444 | | GB798-88 | eye bolts form | | 42 | DIN462 | | | internal tab washers | | 43 | DIN463 | | GB855-88 | washers with two taps | | 44 | DIN464 | | GB834-88 | knurled thumb screws with collar | | 45 | DIN465 | | | slotted knurled thumb screws with collar | | 46 | DIN466 | | GB806-88 | knurled thumb nuts with collar | | 47 | DIN467 | | GB807-88 | knurled thumb thin nuts | | 48 | DIN470 | | | sealing washers | | 49 | DIN471 | | GB894.1-86 | retaining rings for shafts(external),circlips | | 50 | DIN472 | | GB893.1-86 | retaining rings for bores(internal),circlips | | 51 | DIN478 | | | square head bolts with collar | | 52 | DIN479 | | | square hea bolts with half dog point | | 53 | DIN480 | | | square head bolts with collar,half dog point and rounded end | | 54 | DIN508 | | | t-slot nutsiso299 | | 55 | DIN525 | | | single end studs | | 56 | DIN529 | | GB799-88 | masonry bolts | | 57 | DIN546 | | GB817-76 | slotted round nuts | | 58 | DIN547 | | GB815-88 | round nuts with drilled holes in one face | | 59 | DIN551 | ISO4776 | GB73-85 | slotted sit screws with flat point | | 60 | DIN553 | ISO7434 | GB71-85 | slotted set screws with cone point | | 61 | DIN555 | ISO4034 | | hexagon nuts | | 62 | DIN557 | | GB39-88 | -csquare nuts | | 63 | DIN558 | ISO4018 | | hexagon screws | | 64 | DIN561 | | | hexagon set screws with full dog point | | 65 | DIN52 | | | bsquare nuts without bevel(pressed nuts) | | 66 | DIN571 | | GB102-86 | hexagon head wood screws (coach screws) | | 67 | DIN580 | ISO3266 | GB825-76 | lifting eye bolts | | 68 | DIN582 | | | lifting eye nuts | | 69 | DIN601 | ISO4016 | | hexagon bolts | | 70 | DIN603 | ISO8677 | GB14-88 | mushroom head square neck bolts (carriage bolts) | | 71 | DIN604 | | | flat countersunk nib bolts | | 72 | DIN605 | | | flat countersunk long square neck bolts | | 73 | DIN607 | | | cup head nib bolts | | 74 | DIN607 | | | flat countersunk shout square neck bolts | | 75 | DIN609 | | | hexagon fitted bolts,long thread | | 76 | DIN610 | | | hexagon fitted bolts,short thread | | 77 | DIN653 | | GB835-88 | knurled thumb screws thin type | | 78 | DIN660 | ISO1051 | GB867-86 | round head rivets | ## Description Carbon Steel Hex Socket Allen Square Flat Head Machine Screw is part of our socket head cap & allen screws range (Screws). ### Key details - **Type:** Square Head - **Standard:** DIN, GB, ANSI, JIS - **Material:** Carbon Steel - **Grade:** 8.8 - **Head Style:** Round - **Groove:** Cross - **Connection:** Common Bolt - **Custom:** Yes Available configurations include material, head style, standard, grade and custom. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 5,000 pieces at US$0.024 – 0.0312 per piece. Send one inquiry with the part number, quantity and destination, and Engineering Hardware & Fasteners confirms size, thread, material, grade, finish, price, lead time and shipping, checks the goods before dispatch and ships them to you. ## Frequently asked questions ### What is the minimum order quantity (MOQ) for Carbon Steel Hex Socket Allen Square Flat Head Machine Screw? The listed minimum order is 5,000 pieces, at US$0.024 – 0.0312 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size. ### How does the price change with quantity? Volume pricing: US$0.0312 for 5,000–9,999 pieces; US$0.0276 for 10,000–99,999 pieces; US$0.024 for 100,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote. ### What are the main specifications of Carbon Steel Hex Socket Allen Square Flat Head Machine Screw? Type: Square Head; Standard: DIN, GB, ANSI, JIS; Material: Carbon Steel; Grade: 8.8; Head Style: Round; Groove: Cross. The full specification table and any technical parameter tables are listed on this page. ### Can this product be customized (OEM)? Listed configurations include material, head style, standard, grade and custom. Size, thread, length, material and grade, surface finish, head marking, packaging and labels can be quoted to your specification or drawing. ### What is the lead time and how is it shipped? Lead time depends on quantity and customization and is confirmed in your quote. Engineering Hardware & Fasteners checks the goods before dispatch and ships by express, air or sea; mixed orders can be consolidated in one shipment. ### Which other socket head cap & allen screws are available? The Socket Head Cap & Allen Screws category lists 2,042 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) How we work ## Specified, checked and shipped by Engineering Hardware & Fasteners Engineering Hardware & Fasteners supplies bolts, screws, nuts, washers, anchors, rivets and fastening hardware to equipment makers, contractors, distributors and maintenance teams. Orders go through one controlled process: size, thread, material, grade and finish confirmed, samples approved, dimensions, thread fit and plating checked before packing, then packed for export — standard or made to drawing. - DIN, ISO, ASTM, ANSI, JIS and GB standard parts - Non-standard parts made to your drawing - Dimensions, thread gauges and plating checked before packing - Export cartons and pallets, consolidated mixed orders - Samples available for approval before mass production [![Production floor](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor-1024x683.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor.webp) Production floor [![Inspection bench](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench.webp) Inspection bench [![Sorting & packing](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-03-sorting-and-packing-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-03-sorting-and-packing.webp) Sorting & packing [![Parts warehouse](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-04-parts-warehouse-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-04-parts-warehouse.webp) Parts warehouse [![Sample review](https://engineeringhardware.com/wp-content/uploads/2026/11/office-02-office-sample-review-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/office-02-office-sample-review.webp) Sample review [![Sales office](https://engineeringhardware.com/wp-content/uploads/2026/11/office-01-daily-sales-office-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/office-01-daily-sales-office.webp) Sales office [More about us →](https://engineeringhardware.com/about/) · [Request a sample or custom quote →](https://engineeringhardware.com/contact/) ## Request a quote for this product ## Related products [All Socket Head Cap & Allen Screws →](https://engineeringhardware.com/fastener-products/screws/socket-head-cap-allen-screws/) [![M10-1.5 X 70 1.4501 Allen Key Hex Socket Countersunk Head Screws](https://img.engineeringhardware.com/M10-1-5-X-70-1-4501-Allen-Key-Hex-Socket-Countersunk-Head-Screws.webp)](https://engineeringhardware.com/product/m10-1-5-x-70-1-4501-allen-key-hex-socket-countersunk-head-screws/) Socket Head Cap & Allen Screws ### [M10-1.5 X 70 1.4501 Allen Key Hex Socket Countersunk Head Screws](https://engineeringhardware.com/product/m10-1-5-x-70-1-4501-allen-key-hex-socket-countersunk-head-screws/) Countersunk Head · DIN, GB, ANSI, BSW, JIS, GOST **US$0.012 – 1.20**MOQ 10 pieces [![Premium Carbon Steel Hex Socket Screws for Durable Furniture 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