Top 6 Screw Manufacturers and Suppliers Serving Japan (2026 Guide)

JAPAN · SCREW SOURCING REVIEW · VERIFIED 27 OCTOBER 2026

Japan screw sourcing spans precision production, small set-screw machining, socket fasteners, proprietary drive systems and broad catalog distribution. A buyer should identify the part family and supply route first. NITTOSEIKO is relevant to precision and self-tapping production; SAIDA is a focused micro set-screw option; Nissan Screw publishes socket-fastener specifications; SUNCO provides a trading and catalog route.

The 6 companies below cover precision screw manufacturing, specialist set screws, socket fasteners, drive systems and catalog supply. Match the product and supplier role to your assembly before requesting quotations. This guide is published by Shi Shi Tong, a custom-screw manufacturer in Shenzhen, China; our overseas option is discussed separately.

Compare Product Specialization and Supply Route

Japanese manufacturers and trading companies offer different levels of process access and catalog coverage. For an international production network, confirm where the selected screw is made and which entity will supply it.

For a custom component, compare drawing review, tooling, sample acceptance and production quantities. For a catalog purchase, retain the exact reference, material and finish so that quotations can be evaluated on the same basis.

Japan Screw Suppliers at a Glance

1. NITTOSEIKO

Best considered for: Precision and self-tapping screws for repeat industrial assembly
Business location: Head office: Ayabe City, Kyoto, Japan; Japanese and overseas production network
Business role: precision fastener manufacturer

NITTOSEIKO's fastener business manufactures precision screws, self-tapping screws and other cold-forged parts. Its official product overview separates that business from screw-driving machinery and inspection equipment, so the company is included for actual fastening screws, not merely assembly tools. The corporate profile identifies its head office in Ayabe City, Kyoto.

The company describes production in Japan and overseas. For a repeat OEM program, clarify the nominated screw, supplying entity and production location before treating the order as Japan-made. Its Japanese FAQ also distinguishes products supplied through agencies and explains that sample availability depends on the required shape and surface treatment. Confirm those arrangements for the actual project rather than assuming a stock or direct-sales route.

Before approval: Confirm the producing location, screw specification and agency supply route.

Official resources: Official product / capability page · Company / location source

2. SAIDA Manufacturing / DELscrew

Best considered for: Small slotted set screws and custom miniature machined parts
Business location: Company and machining base: Akiruno, Tokyo, Japan
Business role: micro slotted-set-screw manufacturer and specialist supplier

SAIDA specializes in small slotted set screws under its DELscrew offering. The official dimension pages separate flat, cone and oval point designs and identify steel and stainless options; selected other point forms are made to order. Its company information places the machining business in Akiruno, Tokyo.

This is a focused option for miniature retention or adjustment parts, not a broad construction-screw source. SAIDA describes its own slotted-screw machining and also offers hex-socket set screws; those two supply roles should not be blended into an unsupported claim that every offered item is made in-house. Check point contact, thread dimensions, material and the required quantity. The English pages state that customer support is available in Japanese, which an overseas buyer should plan for.

Before approval: Specify point geometry and size, and arrange communication in Japanese where needed.

Official resources: Official product / capability page · Company / location source

3. Fujita Rashi Kougyou

Best considered for: Application-led screw sourcing with manufacturing and trading support
Business location: Headquarters: Nagoya; production facility: Okazaki, Aichi, Japan
Business role: fastener manufacturer and trading company

Fujita Rashi Kougyou combines manufacturing with a trading-company role. Its current service page proposes metal and resin self-tapping screws, contamination-resistant screws and waterproof screw solutions. The company directory separately identifies the Nagoya headquarters, Okazaki production facility and Komaki logistics center.

That hybrid model can be useful when a procurement team needs more than one fastener technology or an application discussion across suppliers. It also makes source identification important: a published screw solution is not proof that Fujita itself manufactures every reference. Ask who makes the proposed screw, where the work is performed and who controls the drawing and acceptance records. Keep the manufacturing, sourcing and assembly-equipment parts of the offer distinct.

Before approval: Ask which products are made in-house and which are sourced from partner manufacturers.

Official resources: Official product / capability page · Company / location source

4. Nissan Screw Co., Ltd. (NSN)

Best considered for: Socket cap, countersunk and button-head screw specifications
Business location: Headquarters and main operating base: Matsubara, Osaka, Japan
Business role: socket fastener manufacturer

Nissan Screw, identified by the NSN brand, publishes a hexagon-socket screw series that includes cap, countersunk and button-head forms. The current product page provides variant-specific material, strength, finish and production information. Its official company information and homepage locate the business in Matsubara, Osaka; this is the screw company, not a profile of the vehicle manufacturer.

The technical tables are useful because head shape and material change the stated product conditions. Do not transfer a cap-screw grade or load assumption to a countersunk or button-head item without reading the exact row and notes. Confirm whether the selected size is a standard production item or made to order, and settle any dimensional or finish deviation before procurement.

Before approval: Use the exact product's grade, head-style limits and production designation.

Official resources: Official product / capability page · Company / location source

5. HIOS Inc.

Best considered for: Proprietary screw-drive systems and assembly-oriented screw selection
Business location: Head office: Sumida-ku, Tokyo; Japanese and overseas operating bases
Business role: screw and fastening-tool developer / manufacturer

HIOS should not be treated solely as a screwdriver supplier: its official screw catalog lists proprietary recess and screw systems, including Intrtorque, Totupla, HIOS Clover and a DELTA PT combination. Its corporate outline includes the development and production of screws as well as tools, with a Tokyo head office and a Yamagata factory among the domestic bases.

This route is most relevant when drive engagement, handling or automated assembly is part of the design decision. Review the screw, bit and assembly process together, and validate the proposed configuration rather than repeating headline claims about cam-out or workability as guaranteed results. The company also lists overseas bases, so confirm the producing source of the specific screw rather than assuming every offering originates in Japan.

Before approval: Confirm the screw-and-bit combination, license availability and assembly validation.

Official resources: Official product / capability page · Company / location source

6. SUNCO Industries

Best considered for: Mixed catalog purchases, JIS references and specialist screw assortment
Business location: Head office: Osaka; distribution operations: Higashi Osaka, Japan
Business role: specialist fastener wholesaler and trading company

SUNCO is a specialist fastener trading company, not a screw factory simply because it handles Japanese products. Its catalog includes machine, pre-assembled, tapping, socket, set and micro screw categories, among others. The official About page describes its Higashi Osaka distribution and packing operations and a purchasing model suited to multiple items in small quantities.

That makes it useful for catalog sourcing and consolidated orders, particularly when the buyer needs defined Japanese fastener references. Verify the actual manufacturer and item origin, and ask which documentation can accompany the shipment. Do not treat a broad made-in-Japan product message or a distribution-center address as proof of origin for every catalog item, especially where imported references are also offered.

Before approval: Verify the actual maker, origin, reference and availability for each ordered item.

Official resources: Official product / capability page · Company / location source

Prepare the RFQ for a Japanese Screw Source

Use an unambiguous drawing or product designation. If the design calls for a JIS reference, identify the actual standard and version together with the head, drive, thread and dimensions. Do not use the label Japanese screw as a substitute for that specification. Confirm whether an apparently similar catalog product is truly equivalent before changing a production drawing.

1. For precision or miniature screws, name the critical dimensions, point form and inspection method; add handling and packaging requirements where they affect assembly.
2. For a proprietary drive or thread-forming design, identify the screw family and required mating component or tool, then request application review.
3. For a catalog consolidation order, provide exact references, quantities and required documents, and ask about the actual maker and origin.
4. Agree the drawing revision, sample acceptance, supply entity, producing site, communication language and release schedule before repeat orders.

Compare the Whole Assembly Offer

Some candidates provide manufacturing and trading services together, while others connect the screw with an assembly system or a specialist catalog. Ask what is included: engineering review, samples, tools, finishing, inspection and shipment documentation are separate responsibilities. Confirm the commercial route and current lead time rather than assuming that a technical website means direct stock sales.

Where a China-made component is acceptable, Shi Shi Tong’s made-to-print screw service can review the same drawing. Our company details state the Shenzhen base, and our quality-control information describes project-specific verification. This is an alternative manufacturing route, not a claim of Japanese origin.

Japan Screw Sourcing FAQ

Is every company in this guide a Japanese screw manufacturer?

No. SUNCO is explicitly a trading and distribution business, and Fujita combines manufacturing with trading. The profiles label those roles. Manufacturing capability at the company level also does not establish that every supplied reference is made in-house.

Does JIS mean that a screw was manufactured in Japan?

No. A technical standard and a country of manufacture are different attributes. Specify the required standard separately from origin, and obtain the relevant item and source documentation when both matter to the purchase.

Which option is relevant to small set screws?

SAIDA publishes a focused slotted set-screw range with point and material distinctions. Match the dimensions and point form to the application and confirm communication arrangements. A miniature screw still requires a defined inspection and sample-approval plan.

How can I choose among these 6 businesses?

Start with the actual product family, then choose the appropriate manufacturing, trading or assembly-system route. Compare order-specific technical exceptions, origin, sample evidence and commercial terms. Use the numbered list as a starting point, not as supplier approval.

Use the Product Family to Choose the First Conversation

A precision production screw, a small adjustment screw and a mixed catalog order need different sourcing partners. Use the official evidence to narrow the field, resolve the manufacturing and supply roles, and validate the actual item before placing repeat demand.

If a drawing-based import is suitable, share the drawing, material, finish and estimated quantity with Shi Shi Tong. We can review the proposed process and inspection requirements with transparent China-based manufacture.