--- title: "Twist off Type Tension Control Structural Bolt/Nut/Washer Assemblies" description: "Twist off Type Tension Control Structural Bolt/Nut/Washer Assemblies — Structural & Heavy Hex Bolts. MOQ 1,000 pieces, US$0.012 – 0.06." url: https://engineeringhardware.com/product/twist-off-type-tension-control-structural-bolt-nut-washer-assemblies/ source: Engineering Hardware & Fasteners --- # Twist off Type Tension Control Structural Bolt/Nut/Washer Assemblies [![Twist off Type Tension Control Structural Bolt/Nut/Washer Assemblies](https://img.engineeringhardware.com/Twist-off-Type-Tension-Control-Structural-Bolt-Nut-Washer-Assemblies.webp)](https://img.engineeringhardware.com/Twist-off-Type-Tension-Control-Structural-Bolt-Nut-Washer-Assemblies.webp) - Standard & made-to-drawing parts - Checked before shipping - Air, sea & express delivery [Bolts › Structural & Heavy Hex Bolts](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/twist-off-type-tension-control-structural-bolt-nut-washer-assemblies.md) Model no. **Bolt** | **US$0.06**1,000–99,999 pieces | **US$0.012**100,000+ pieces | | --- | --- | MOQ 1,000 pieces · Final price confirmed in your quote - **Material:** 20mntib,35vb - **Head Style:** Round - **Standard:** GB - **Grade:** 10.9 - **Finish:** Black - **Package Size:** 28.00cm * 25.00cm * 13.50cm Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Twist%20off%20Type%20Tension%20Control%20Structural%20Bolt%2FNut%2FWasher%20Assemblies%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Ftwist-off-type-tension-control-structural-bolt-nut-washer-assemblies%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 | 20mntib,35vb | | Type | Round Head | | Model NO. | Bolt | | Head Style | Round | | Standard | GB | | Grade | 10.9 | | Application | Chemical Industry, Building | | Finish | Black | | Certification | ISO9001 | | MOQ | 1000PCS | | Delivery Time | 7 Days | | Sample | Available | | European Anti-Dumping | 39.6% | | Durability | Enhanced | | Transport Package | 25kg/Carton+Pallet | | Specification | M16-M30 | | Origin | Ningbo, Zhejiang | | HS Code | 7318151001 | | Production Capacity | 2500 Tons/Month | | Package Size | 28.00cm * 25.00cm * 13.50cm | | Package Gross Weight | 22.000kg | | Our main products are fasteners | bolts, screws, rods, nuts, washers, anchors and rivets. | | Keyword | china supplies,OEM/ODM,Manufacturer,screw,bolt,hardware.bolt and nut,fastener,carbon steel,fange nut.hexagonal nut.stainless steel nut,zlfastener,sinofastener | | Category | [Structural & Heavy Hex Bolts](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) | ## Technical parameters | Standard | GB3632 | | --- | --- | | Size | M16,M20,M22,M24,M27,M30 | | Grade | 10.9 | | Finish | Black | | Material | 20MnTiB,35VB | ## Description Twist off Type Tension Control Structural Bolt/Nut/Washer Assemblies is part of our structural & heavy hex bolts range (Bolts). ### Key details - **Type:** Round Head - **Standard:** GB - **Material:** 20mntib,35vb - **Grade:** 10.9 - **Head Style:** Round - **Finish:** Black - **Application:** Chemical Industry, Building - **Certification:** ISO9001 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$0.012 – 0.06 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 Twist off Type Tension Control Structural Bolt/Nut/Washer Assemblies? The listed minimum order is 1,000 pieces, at US$0.012 – 0.06 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$0.06 for 1,000–99,999 pieces; US$0.012 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 Twist off Type Tension Control Structural Bolt/Nut/Washer Assemblies? Type: Round Head; Standard: GB; Material: 20mntib,35vb; Grade: 10.9; Head Style: Round; Finish: Black. 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 structural & heavy hex bolts are available? The Structural & Heavy Hex Bolts category lists 2,565 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-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 Structural & Heavy Hex Bolts →](https://engineeringhardware.com/fastener-products/bolts/structural-heavy-hex-bolts/) [![High Strength 8.8 10.9 12.9 Grade Hex Flange Bolt, Carbon Steel & Stainless Steel, Color Zinc Plated](https://img.engineeringhardware.com/High-Strength-8-8-10-9-12-9-Grade-Hex-Flange-Bolt-Carbon-Steel-Stainless-Steel-Color-Zinc-Plated.webp)](https://engineeringhardware.com/product/high-strength-8-8-10-9-12-9-grade-hex-flange-bolt-carbon-steel-stainless-steel-color/) Structural & Heavy Hex Bolts ### [High Strength 8.8 10.9 12.9 Grade Hex Flange Bolt, Carbon Steel & Stainless Steel, Color Zinc Plated](https://engineeringhardware.com/product/high-strength-8-8-10-9-12-9-grade-hex-flange-bolt-carbon-steel-stainless-steel-color/) Hexagon Head · DIN, ANSI, GB, JIS, BSW, GOST **US$0.0001 – 0.0012**MOQ 500 pieces [![Carbon Steel, Alloy Stainless Half Thread High-Strength Bolts for Steel Structures](https://img.engineeringhardware.com/Carbon-Steel-Alloy-Stainless-Half-Thread-High-Strength-Bolts-for-Steel-Structures.webp)](https://engineeringhardware.com/product/carbon-steel-alloy-stainless-half-thread-high-strength-bolts-for-steel-structures/) Structural & Heavy Hex Bolts ### [Carbon Steel, Alloy Stainless Half Thread High-Strength Bolts for Steel Structures](https://engineeringhardware.com/product/carbon-steel-alloy-stainless-half-thread-high-strength-bolts-for-steel-structures/) Hexagon Head · DIN, ANSI, GB, JIS, BSW, GOST **US$24.00**MOQ 100 pieces [![Heavy-Duty Zinc Plated Structural Lock Bolt for Maximum Strength](https://img.engineeringhardware.com/Heavy-Duty-Zinc-Plated-Structural-Lock-Bolt-for-Maximum-Strength.webp)](https://engineeringhardware.com/product/heavy-duty-zinc-plated-structural-lock-bolt-for-maximum-strength/) Structural & Heavy Hex Bolts ### [Heavy-Duty Zinc Plated Structural Lock Bolt for Maximum Strength](https://engineeringhardware.com/product/heavy-duty-zinc-plated-structural-lock-bolt-for-maximum-strength/) Hexagon Head · DIN, GB, ANSI, BSW, JIS, GOST **US$0.012**MOQ 100 pieces [![High Strength Acid and Alkali Corrosion Resistance DIN933 ISO 4017 Brass Fully Threaded Solid Brass Hex Head Bolts](https://img.engineeringhardware.com/High-Strength-Acid-and-Alkali-Corrosion-Resistance-DIN933-ISO-4017-Brass-Fully-Threaded-Solid-Brass-Hex-Head-Bolts.webp)](https://engineeringhardware.com/product/high-strength-acid-and-alkali-corrosion-resistance-din933-iso-4017-brass-fully/) Structural & Heavy Hex Bolts ### [High Strength Acid and Alkali Corrosion Resistance DIN933 ISO 4017 Brass Fully Threaded Solid Brass Hex Head Bolts](https://engineeringhardware.com/product/high-strength-acid-and-alkali-corrosion-resistance-din933-iso-4017-brass-fully/) Hexagon Head · DIN, ANSI, GB, JIS, BSW, GOST **US$0.12 – 0.14**MOQ 10,000 pieces [![DIN6914 Heavy Hex Structural Bolt High Stength](https://img.engineeringhardware.com/DIN6914-Heavy-Hex-Structural-Bolt-High-Stength.webp)](https://engineeringhardware.com/product/din6914-heavy-hex-structural-bolt-high-stength/) Structural & Heavy Hex Bolts ### [DIN6914 Heavy Hex Structural Bolt High Stength](https://engineeringhardware.com/product/din6914-heavy-hex-structural-bolt-high-stength/) Hexagon Head · Carbon Steel **Price on request**MOQ 10,000 pieces [![ASTM A320 Heavy Hex Bolts](https://img.engineeringhardware.com/ASTM-A320-Heavy-Hex-Bolts.webp)](https://engineeringhardware.com/product/astm-a320-heavy-hex-bolts/) Structural & Heavy Hex Bolts ### [ASTM A320 Heavy Hex Bolts](https://engineeringhardware.com/product/astm-a320-heavy-hex-bolts/) Steel · 4.8, 6.8, 8.8, 10.9, 12.9 **US$0.12 – 1.20**MOQ 1,000 pieces [![High-Strength GB5787 Steel Hexagon Flange Bolts Zinc Plated Bolt for Construction and Machinery Fastening](https://img.engineeringhardware.com/High-Strength-GB5787-Steel-Hexagon-Flange-Bolts-Zinc-Plated-Bolt-for-Construction-and-Machinery-Fastening.webp)](https://engineeringhardware.com/product/high-strength-gb5787-steel-hexagon-flange-bolts-zinc-plated-bolt-for-construction/) Structural & Heavy Hex Bolts ### [High-Strength GB5787 Steel Hexagon Flange Bolts Zinc Plated Bolt for Construction and Machinery Fastening](https://engineeringhardware.com/product/high-strength-gb5787-steel-hexagon-flange-bolts-zinc-plated-bolt-for-construction/) Hexagon Head With Flange · DIN, ANSI, GB, JIS, BSW, GOST **US$0.012 – 0.06**MOQ 100 pieces [![DIN976 8.8-Grade High-Strength Double-End Bolts Threaded Studs Zinc Finish Black Heavy Industry Use 3-Year Warranty OEM](https://img.engineeringhardware.com/DIN976-8-8-Grade-High-Strength-Double-End-Bolts-Threaded-Studs-Zinc-Finish-Black-Heavy-Industry-Use-3-Year-Warranty-OEM.webp)](https://engineeringhardware.com/product/din976-8-8-grade-high-strength-double-end-bolts-threaded-studs-zinc-finish-black/) Structural & Heavy Hex Bolts ### [DIN976 8.8-Grade High-Strength Double-End Bolts Threaded Studs Zinc Finish Black Heavy Industry Use 3-Year Warranty OEM](https://engineeringhardware.com/product/din976-8-8-grade-high-strength-double-end-bolts-threaded-studs-zinc-finish-black/) Round Head · DIN, ANSI, GB, JIS, BSW, GOST **US$0.06 – 0.36**MOQ 10,000 pieces **US$0.012 – 0.06**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%20Twist%20off%20Type%20Tension%20Control%20Structural%20Bolt%2FNut%2FWasher%20Assemblies%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Ftwist-off-type-tension-control-structural-bolt-nut-washer-assemblies%2F)