--- title: "Carbon Stainless Steel Flat Square Head Flange Hexagonal Bolt" description: "Carbon Stainless Steel Flat Square Head Flange Hexagonal Bolt — Flange Bolts. Material: Carbon Steel, Standard: DIN, ANSI. MOQ 1,000 pieces, US$0.12 – 0.60." url: https://engineeringhardware.com/product/carbon-stainless-steel-flat-square-head-flange-hexagonal-bolt/ source: Engineering Hardware & Fasteners --- # Carbon Stainless Steel Flat Square Head Flange Hexagonal Bolt [![Carbon Stainless Steel Flat Square Head Flange Hexagonal Bolt](https://img.engineeringhardware.com/Carbon-Stainless-Steel-Flat-Square-Head-Flange-Hexagonal-Bolt.webp)](https://img.engineeringhardware.com/Carbon-Stainless-Steel-Flat-Square-Head-Flange-Hexagonal-Bolt.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Bolts › Flange Bolts](https://engineeringhardware.com/fastener-products/bolts/flange-bolts/) Updated 2026-11-03 · [Markdown version](https://engineeringhardware.com/product/carbon-stainless-steel-flat-square-head-flange-hexagonal-bolt.md) Model no. **Bolt** | **US$0.60**1,000–4,999 pieces | **US$0.36**5,000–9,999 pieces | **US$0.12**10,000+ pieces | | --- | --- | --- | MOQ 1,000 pieces · Final price confirmed in your quote - **Material:** Carbon Steel - **Head Style:** Hexagonal,Flange, Square - **Standard:** DIN, ANSI - **Grade:** 4.8 - **Finish:** Plain, Zinc, Yellow Zinc, HDG, Silver Ruspert, Dac - **Head:** Hexagonal, Cap,Square - **Non-Standards:** OEM Is Available, According to Drawing or Samples - **Size:** M5-M48 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%20Stainless%20Steel%20Flat%20Square%20Head%20Flange%20Hexagonal%20Bolt%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fcarbon-stainless-steel-flat-square-head-flange-hexagonal-bolt%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 | Hexagon Head | | Model NO. | Bolt | | Connection | Common Bolt | | Head Style | Hexagonal,Flange, Square | | Standard | DIN, ANSI | | Grade | 4.8 | | Application | Machinery, Chemical Industry, Environmental, Building | | Finish | Plain, Zinc, Yellow Zinc, HDG, Silver Ruspert, Dac | | Model No. | Hexagonal,Cap, Flange Bolt, Cap Bolt, | | Head | Hexagonal, Cap,Square | | Non-Standards | OEM Is Available, According to Drawing or Samples | | Transport | Plastic Bag, Boxes and Cartons, Pallets, Customize | | Size | M5-M48 | | MOQ | 1000PCS | | Delivery Time | 30-45 Days | | Length | as The Request | | Transport Package | Plastic Bag, Boxes and Cartons, Pallets, Customize | | Specification | M5-M48 | | Origin | Shanghai | | Category | [Flange Bolts](https://engineeringhardware.com/fastener-products/bolts/flange-bolts/) | ## Technical parameters | Model NO.: | Hexagonal,Cap, flange bolt, cap bolt, | | --- | --- | | Material: | Steel- Stainless Steel | | Head Style: | Hexagonal, Cap,square | | Standard: | DIN, ISO, ASME, ASTM, BSW | | Grade: | 4.8, 8.8, 10.9, 12.9 ASTM 307, ASTM 325 | | Finish | Plain, Zinc, Yellow Zinc, HDG, Silver Ruspert, Dacromet | | Size: | M5-M48 | | Non-standards | OEM is available, according to drawing or samples | | Transport Package: | Plastic bag, Boxes and Cartons, Pallets, Customize | ## Description Carbon Stainless Steel Flat Square Head Flange Hexagonal Bolt is part of our flange bolts range (Bolts). ### Key details - **Type:** Hexagon Head - **Standard:** DIN, ANSI - **Material:** Carbon Steel - **Grade:** 4.8 - **Size:** M5-M48 - **Length:** as The Request - **Head Style:** Hexagonal,Flange, Square - **Finish:** Plain, Zinc, Yellow Zinc, HDG, Silver Ruspert, Dac Available configurations include material, head style, standard, grade and finish. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request. ### Ordering through Engineering Hardware & Fasteners Minimum order is 1,000 pieces at US$0.12 – 0.60 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 Stainless Steel Flat Square Head Flange Hexagonal Bolt? The listed minimum order is 1,000 pieces, at US$0.12 – 0.60 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$0.60 for 1,000–4,999 pieces; US$0.36 for 5,000–9,999 pieces; US$0.12 for 10,000+ pieces. Final prices depend on size, material, finish and packing and are confirmed in your quote. ### What are the main specifications of Carbon Stainless Steel Flat Square Head Flange Hexagonal Bolt? Type: Hexagon Head; Standard: DIN, ANSI; Material: Carbon Steel; Grade: 4.8; Size: M5-M48; Length: as The Request. 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 finish. 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 flange bolts are available? The Flange Bolts category lists 2,404 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/bolts/flange-bolts/](https://engineeringhardware.com/fastener-products/bolts/flange-bolts/) 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 Flange Bolts →](https://engineeringhardware.com/fastener-products/bolts/flange-bolts/) [![Quality Assurance on Carbon Steel Fasteners Bolt for Indian Industrial Use](https://img.engineeringhardware.com/Quality-Assurance-on-Carbon-Steel-Fasteners-Bolt-for-Indian-Industrial-Use.webp)](https://engineeringhardware.com/product/quality-assurance-on-carbon-steel-fasteners-bolt-for-indian-industrial-use/) Flange Bolts ### [Quality Assurance on Carbon Steel Fasteners Bolt for Indian Industrial Use](https://engineeringhardware.com/product/quality-assurance-on-carbon-steel-fasteners-bolt-for-indian-industrial-use/) Hexagon Head With Flange · DIN, ANSI, GB, JIS, BSW, GOST **US$0.12 – 0.34**MOQ 1,000 pieces [![China Suppliers ANSI/ASTM Grade 4.8 Galvanized Carbon Steel Hex Flange 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Alloy Steel Hexalobular 12 Torx Point Flange Head Bolt Made in China](https://engineeringhardware.com/product/grade-10-9-12-9-alloy-steel-hexalobular-12-torx-point-flange-head-bolt-made-in-china/) 12 Torx Point Flange Head · DIN, GB, ANSI, BSW, JIS, GOST **US$0.024 – 0.11**MOQ 1,000 pieces [![Hex Head Serrated Flange Bolts Dacromet Coating](https://img.engineeringhardware.com/Hex-Head-Serrated-Flange-Bolts-Dacromet-Coating.webp)](https://engineeringhardware.com/product/hex-head-serrated-flange-bolts-dacromet-coating/) Flange Bolts ### [Hex Head Serrated Flange Bolts Dacromet Coating](https://engineeringhardware.com/product/hex-head-serrated-flange-bolts-dacromet-coating/) Hexagon Head With Flange · DIN, ANSI, GB, JIS, BSW, Non-Standard **US$0.012 – 0.24**MOQ 1,000 pieces **US$0.12 – 0.60**MOQ 1,000 piecesGet a quote[WA](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Carbon%20Stainless%20Steel%20Flat%20Square%20Head%20Flange%20Hexagonal%20Bolt%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fcarbon-stainless-steel-flat-square-head-flange-hexagonal-bolt%2F)