Sugiura Seisakusho

What Sugiura Seisakusho does

Sugiura Seisakusho Co., Ltd. (株式会社杉浦製作所) is a privately held Japanese metal fastener manufacturer founded in May 1939 in Nishio City, Aichi Prefecture, and currently led by President Hiroshi Sugiura. The company designs and manufactures automotive nuts, bolts, studs, plugs, collars, and specialized functional fasteners (cap nuts, castle nuts, lock nuts, peeling nuts, seal weld nuts, pierce nuts, clinch bolts, and corrosion-resistant top-coated fasteners), with the product line organized into general products, functional components, and non-ferrous components serving engine, body, interior, chassis, drivetrain, and intake/exhaust applications. Manufacturing is anchored by a three-forging technology system (cold forging M3-M22, warm forging for stainless, heat forging M22-M100) executed across five domestic factories in Nishio City plus four overseas production sites in Columbus (USA), Jiaxing (China), Dusseldorf (Germany), and Karawang (Indonesia), with stated monthly capacity exceeding 300 million products.

All major processes (design, mold making, forging, threading, heat treatment, surface processing, inspection, shipment) are conducted in-house, with approximately 50% of molds produced internally and heat/surface processing supported by affiliated Sugiura Boseikogyo. The company sells directly to automotive OEMs under negotiated per-contract pricing; no public pricing is disclosed. The customer roster is concentrated within the Toyota Group — Toyota Motor Corporation (since 1939), Hino Motors, Daihatsu, Toyota Industries, Toyota Auto Body, Toyota Motor East Japan, and AISIN SEIKI — supplemented by an emerging construction fastener line launched in 2024 targeting scaffolding and construction machinery fasteners. Certifications include ISO 9001 (1998/2002), ISO 14001 (2000), and IATF 16949 (2022), and the firm has received Toyota Quality Control awards continuously from 2016 through 2024, including the highest-tier Best Award for the first time in 2024.

Revenue model is hardware sales of manufactured fastener components under direct B2B contracts with major OEMs, distributed entirely through direct OEM sales (domestic) and overseas production-site local sales. Marketing is primarily event-driven via industry exhibitions (Automotive Technology Expo Yokohama, INTERNATIONAL FASTENER EXPO Las Vegas) and earned media in regional business publications. The company's FY2023 consolidated sales were 49 billion yen with 1,100 consolidated employees, and it operates without external institutional or PE ownership.

Name

Sugiura Seisakusho

Legal name

株式会社杉浦製作所

Website

https://ssc-ltd.co.jp

Company type

Private

Founded year

1939

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Sugiura Seisakusho is a privately held Japanese automotive fastener manufacturer, founded in 1939, producing nuts, bolts, and specialized functional fasteners in-house across five domestic and four overseas factories. It sells primarily to Toyota Group OEMs and is expanding into construction fasteners.

Ownership category

akta.pro rank

Headquarters

HQ city

Nishio

HQ country

Japan

HQ region

Asia

Offices11 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Automotive Fastener Manufacturing: Design, manufacturing, and sales of automotive functional components and fastener parts including weld nuts, wheel nuts, stud bolts, special bolts, collars, precision components, stainless and aluminum/brass parts. Also manufactures functional components such as cap nuts, castle nuts, lock nuts, well-joining nuts, peeling nuts, seal weld nuts, and anti-corrosion top coats. Revenue is derived from direct sales to automotive manufacturers.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Sugiura Seisakusho designs, manufactures, and sells metal fasteners and precision functional components—primarily nuts, bolts, studs, plugs, collars, and specialized fastening solutions—for the automotive industry. The company operates an integrated in-house production system spanning design, mold making, forging (cold, warm, and heat), threading, machining, heat treatment, surface processing, inspection, and shipment. Its products are supplied directly to major automotive OEMs, chiefly Toyota Group companies, for use in engines, body, interior, chassis, drivetrain, and intake/exhaust systems, with emerging expansion into construction fasteners.

Product overview

Sugiura Seisakusho is a metal fastener manufacturer specializing in automotive components. The product portfolio comprises general fastener products (weld nuts, wheel nuts, stud bolts, plugs, special bolts, collars/bushes/T-nuts, precision components in small and large sizes, stainless components, and aluminum/brass components) and functional/specialized components (cap nuts, castle nuts, tight lock nuts, firm lock nuts, well joining nuts, peeling nuts, seal weld nuts, anti-corrosion top coats, insert nut collars, pierce nuts, and clinch bolts). The company also produces construction fasteners as part of its 2024 business expansion. Products serve automotive interior, body, engine, air intake/exhaust, drive train, and chassis applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Weld Nuts (ウェルドナット) Standard weld nuts for attachment to metal surfaces via welding, used in various automotive applications across body, chassis, and engine systems.
• Wheel Nuts (ホイールナット) Nuts designed for securing vehicle wheels to hubs, functioning as primary automotive safety components for passenger and commercial vehicles.
• Stud Bolts (植え込みボルト) Bolts embedded into components for attachment points, used extensively in automotive assembly.
• Plugs (プラグ) Sealing plugs for fluid passages and openings in automotive components.
• Special Bolts (特殊ボルト) Specialized bolts designed for specific automotive applications beyond standard specifications.
• Collars, Bushes, and T-Nuts (カラー・ブッシュ・ティーナット) Cylindrical collars, bushings, and T-nuts used for positioning, spacing, and fastening in automotive assemblies.
• Small Precision Components (小物精密部品) Small-scale precision-manufactured components requiring tight tolerances for critical automotive applications.
• Large Precision Components (大物精密部品) Large-scale precision components for heavy-duty automotive applications.
• Stainless Components (ステンレス部品) Corrosion-resistant stainless steel fasteners and components for demanding environments.
• Aluminum and Brass Components (アルミ・真鍮部品) Lightweight aluminum and brass fasteners for specialized automotive applications.
• Cap Nuts (キャップナット) Nuts with enclosed tops that prevent bolt protrusion damage to adjacent components and protect threads from paint coating.
• Castle Nuts (キャッスルナット) Nuts with groove features that accept cotter pins for secure locking in high-vibration automotive applications.
• Tight Lock Nuts (タイトロックナット) Lock nuts with deformed thread sections that provide vibration-resistant locking functionality.
• Firm Lock Nuts (ファームロックナット) Reusable lock nuts maintaining consistent locking effectiveness even after repeated installation cycles.
• Well Joining Nuts (ウェルジョイニングナット) Anti-seize nuts with tapered chamfer allowing self-alignment to prevent galling during installation.
• Peeling Nuts (ピーリングナット) Special nuts with thread notches that peel away bolt paint during tightening, eliminating masking requirements and providing anti-seize properties.
• Seal Weld Nuts (シールウェルドナット) Fully enclosed weld nuts that prevent water ingress into threads after welding for watertight sealing.
• Anti-Corrosion Enhancement Top Coat (耐食性向上トップコート) Surface coating treatment applied over plating to significantly enhance corrosion resistance and stabilize friction coefficients on fasteners.
• Insert Nut Collars (インサートナット・カラー) Embedded fasteners for resin components, used for bonding plastic parts in automotive assembly.
• Pierce Nuts (ピアスナット) Self-piercing nuts that attach directly to materials like aluminum by creating their own holes, eliminating the need for pre-drilling or welding.
• Clinch Bolts (クリンチボルト) Press-fit bolts for pre-punched holes that secure components without welding, ideal for aluminum automotive applications.
• Construction Fasteners (Scaffolding and Construction Machinery Fasteners) Scaffolding fasteners and construction machinery fasteners produced for the construction industry, representing Sugiura Seisakusho's diversification beyond automotive applications.

Quantifiable outcome

• Monthly delivery capacity of 300 million+ products with zero-defect quality management
• +2 more outcomes

Named customers7 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Five partnerships are on record, tiered core and supporting.

• PT. SUGIURA INDONESIAcoreStrategic or Co-development Partner · 1 January 2012Indonesian production site established in Karawang, West Java, Indonesia in 2012, serving the Southeast Asian automotive market with fastener products.
• HEXAS Precision Technologies Corporation (合克薩斯精工有限公司)coreStrategic or Co-development Partner · 1 January 2005Chinese joint venture production site established in Jiaxing, Zhejiang Province, China in 2005. Specializes in screw manufacturing for the Chinese automotive market.
• SUNRIGHT AMERICA, INC.coreStrategic or Co-development Partner · 1 January 2002North American joint venture production site established in Columbus, Indiana, USA in 2002. Handles nuts, bolts, and forged products for the North American automotive market. Participates in INTERNATIONAL FASTENER EXPO trade shows in Las Vegas.
• MS TECHNOLOGY GmbHcoreStrategic or Co-development Partner · 1 January 2002European production site originally established as NEDRIGHT TECHNOLOGY GmbH in 2002, renamed to MS TECHNOLOGY GmbH. Located in Dusseldorf, western Germany, serving the European automotive market.
• Sugiura Boseikogyo Co., Ltd. (杉浦防錆工業株式会社)supportingOthersRelated company (affiliate) located in Anjo City, Aichi Prefecture. Specializes in heat processing and surface processing (anti-rust) services, complementing the parent company's manufacturing operations.

Scale indicators7 records

Recent moves11 records

Expansion highlights4 records

Direct peers

• Bulten AB: Swedish-listed specialist in automotive fasteners supplying European OEMs. Closest European direct peer — comparable product mix (nuts, bolts, functional fasteners) but serving a different geographic OEM base.
• Nitto Seiko Co., Ltd. Long-established Japanese screw and bolt manufacturer serving automotive, electronics, and industrial markets. Comparable in scale, product breadth (cold-headed fasteners, precision screws), and in-house integrated manufacturing approach.
• MacLean-Fogg Company: Privately-held US automotive fastener manufacturer serving North American OEMs and Tier-1s. Comparable scale, integrated manufacturing model, and customer quality-award culture to Sugiura.
• Meidoh Co., Ltd. Japanese automotive fastener specialist supplying Toyota and other OEMs with nuts, bolts, and precision components. Closely comparable customer base, product mix, and quality certification profile (IATF 16949).
• Aoyama Seisakusho Co., Ltd. Japanese manufacturer of automotive nuts and bolts with a comparable product portfolio (weld nuts, wheel nuts, specialty fasteners) and direct overlap with Toyota Group and other Japanese OEMs. Closest pure-play analog to Sugiura's core nut/bolt business.
• Topura Co., Ltd. Large Japanese manufacturer of automotive bolts, studs, and specialty fasteners, with a comparable cold-forging technology base and Toyota Group customer relationships. Larger scale than Sugiura but directly comparable in business model.
• Kondo Kogyo Co., Ltd. Japanese precision fastener and screw manufacturer serving automotive and industrial markets. Comparable in product range (cold-forged fasteners, machined components) and customer profile of Japanese OEMs.
• Piolax Inc. Japanese manufacturer of automotive fasteners, clips, and precision metal components serving major OEMs including Toyota Group. Overlaps with Sugiura on functional fasteners and insert/clinch-type products.

Emerging players

• Bossard Group: Swiss fastener specialist combining distribution and high-tech fastening solutions (smart factory fastening). Provides a useful reference for the upper bound of fastener value-chain economics, though primarily a distributor/engineering firm rather than pure manufacturer.

Broad incumbents

• Illinois Tool Works Inc. (ITW): US-listed diversified industrial giant with a substantial automotive fastener segment (ITW Automotive). A broad incumbent that competes with Sugiura in global fastener markets but does not specialize in the Japanese OEM niche.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/sugiura-seisakusho-co.-ltd.

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sugiura Seisakusho