Executive summary

• Aerospace and defense fasteners drew the biggest checks. Howmet Aerospace paid about $1.8 billion for Stanley Black & Decker’s Consolidated Aerospace Manufacturing (CAM), and PennAero, backed by Tinicum and Blackstone funds, closed a roughly $1.45 billion purchase of TriMas Aerospace at about 18 times trailing adjusted EBITDA.
• Conglomerates pruned while specialists bought. Stanley Black & Decker, TriMas, SFS (its stamping operations) and Optimas Solutions (its international unit) all sold or carved out businesses during the year.
• Europe produced the largest industrial-fastener combination. Fontana Gruppo’s acquisition of Germany’s Kamax Group creates a company with about €2 billion in revenue and 42 plants.
• North American distribution kept consolidating. Hillman bought master distributor Kanebridge for $315 million, private equity launched new fastener platforms, and Distribution Solutions Group (DSG) kept acquiring while agreeing to its own take-private at $35 per share.
• Disclosure is thin below the headline deals. Most mid-size and small transactions did not publish terms, so reported valuation multiples are scarce.

1. Market backdrop

An investment banker who advises industrial distributors said tariff-driven uncertainty over supply chains and pricing slowed M&A in 2025 without stopping it, and that heading into 2026 both strategic and financial buyers were positioned to deploy capital. Operating conditions improved over the year: the North American Fastener Distributor Index (a survey run by Baird and the FCH Sourcing Network) pointed to stabilization in January and posted a reading of 56.3 in April, where anything above 50 signals expansion.

Two other conditions shaped deal logic. First, aerospace and defense demand gave buyers a reason to pay up for certified, hard-to-replicate capacity. Second, regional footprint became a strategic theme: SFS explicitly framed its US aerospace purchase as part of a local-for-local approach, and trade-press commentary during the year described heavy pressure from US trade measures on Taiwan’s export-oriented fastener makers. A proposed EU expansion of its carbon border adjustment mechanism (CBAM) could also reach fasteners by January 2028, which is a longer-dated factor for importers and their owners.

2. Transactions at a glance

Date (2026)	Buyer	Target	Segment	Reported terms
Jan 5	Threaded Fasteners Inc.	TSA Manufacturing (Omaha, NE)	Manufacturer; vertical integration	Undisclosed
Feb 3 (announced)	Exponent (private equity)	Optimas International (carve-out)	Distribution, Europe and Asia	Undisclosed
Feb 6	Howmet Aerospace	Brunner Manufacturing (Wisconsin)	Large-size and structural fasteners	About $120M cash
Mar 16	PennAero (Tinicum, Blackstone funds)	TriMas Aerospace	Aerospace fasteners and components	About $1.45B cash; about 18x EBITDA
Apr 1	SFS Group	Harald Zahn GmbH (Germany)	Flat-roof fastening systems	About €8M sales; terms undisclosed
Apr 6	Howmet Aerospace	Consolidated Aerospace Manufacturing	Aerospace and defense fasteners, fittings	About $1.8B cash
Apr 10 (signed)	Fontana Gruppo	Kamax Group (Germany)	Automotive and industrial fasteners	Undisclosed; reported completed by mid-July
Jun 11	Rox Capital Partners	Interstate Threaded Products (Dallas)	Specialty threaded fasteners	Undisclosed; new platform
Jul 10	SFS Group	Heartland Precision Fasteners (US)	Aerospace fasteners	Undisclosed; close expected by end of September
Jul 15	LKCM Headwater	Distribution Solutions Group	MRO and fastener distribution	$35 per share in cash; pending
Aug 3 (signed)	Hillman Solutions	Kanebridge	Industrial fastener master distribution	$315M; closed Aug 28
Sep 2	Distribution Solutions Group	American Fasteners Corp. (Florida)	Fastener and MRO distribution	About $39M revenue; terms undisclosed
Oct 30	Skipper Ltd (India)	Sansha Fastener Pvt Ltd	Fastener manufacturing	₹15.5 crore; close expected by Dec 31

3. Aerospace and defense fasteners

Howmet and CAM. Stanley Black & Decker agreed on December 22, 2025 to sell CAM for $1.8 billion in cash, and the sale closed on April 6, 2026. CAM makes fasteners, fittings and other engineered parts for aerospace and defense and was expected to generate roughly $405 to $415 million of revenue in 2025, which implies about 4.4 times revenue at the midpoint (my calculation). Stanley Black & Decker expects about $1.57 billion of net proceeds after taxes and fees, earmarked for debt reduction; it had bought CAM in 2020 for around $1.5 billion. Howmet funded the deal with $1.2 billion of new notes, $450 million of commercial paper and proceeds from selling its Savannah operation, at a blended debt cost of about 4.2%. Management said CAM extends Howmet beyond traditional fasteners into fluid fittings, couplings, heat shields and latches.

Howmet and Brunner. On February 6 Howmet also bought Brunner Manufacturing of Mauston, Wisconsin, for about $120 million in cash. Brunner adds capacity in larger-size fasteners, structural threaded bolts and specials, and it joins Howmet Fastening Systems. Through June 30, the two acquisitions together contributed about 2% of Howmet’s consolidated sales.

PennAero and TriMas Aerospace. TriMas announced the sale on November 4, 2025 at about $1.45 billion in cash, roughly 18 times trailing adjusted EBITDA, for a business with about $374 million of trailing revenue. It closed March 16, 2026. The perimeter includes Monogram Aerospace Fasteners, Allfast Fastening Systems, Mac Fasteners, TFI Aerospace, Martinic Engineering, RSA Engineered Products, Weldmac and TAG (formerly TriMas Aerospace Germany). TriMas expects about $1.2 billion of net after-tax proceeds and says it will use them for growth investments, acquisitions in packaging and life sciences, and share repurchases. PennAero is positioning the combined company as an independent alternative to the industry’s largest consolidators, a pitch that Howmet’s two deals make more relevant.

SFS and Heartland. On July 10 SFS announced it would acquire Heartland Precision Fasteners, a US maker with about 70 employees and about $30 million of 2025 sales, serving aircraft structures and propulsion systems. It is SFS’s entry into North American aerospace, and closing was expected by the end of September subject to merger-control approval; I could not confirm completion. Days earlier, SFS agreed to sell its stamping operations to Adval Tech, and it bought Harald Zahn on April 1 to build its German and Austrian flat-roof business. The pattern is a portfolio reshuffle after a soft 2025, when SFS reported net profit down 9.3%.

4. Industrial and automotive fasteners

Fontana Gruppo and Kamax. The Italian family-owned group signed an agreement on April 10 to acquire all of Germany’s Kamax Group, and press coverage in mid-July reported the deal as completed. Kamax brings 15 plants in Germany, Spain, Slovakia, the Czech Republic, Poland and China. Combined, the group would have 42 plants, more than 9,000 employees and about €2 billion of revenue. Financing came from BPER Corporate & Investment Banking and Cassa Depositi e Prestiti, with a guarantee from SACE. The purchase price was not disclosed in the sources I reviewed. Kamax’s chairman described the sale as a strategic decision made from strength rather than necessity. Fontana had already acquired RTF in India and MNP in the United States in 2025, so Kamax continues a global build-out rather than a one-off.

Optimas International. Exponent agreed on February 3 to buy the international arm of Optimas Solutions (owned by American Industrial Partners), a Gloucester, UK-based distributor of fasteners and C-class components with about 1,500 customers, 2.2 billion parts supplied a year, about 40,000 SKUs and about 1,200 suppliers. It was Exponent’s ninth corporate carve-out in a decade, and Optimas Solutions continues as the Americas business. On August 10 the company launched a Partnership Growth Programme to buy mid-size distributors and specialist engineering firms across the UK, Europe, the Middle East and Africa, and Asia-Pacific.

5. North American distribution and private equity

Hillman and Kanebridge. Hillman agreed on August 3 to acquire Kanebridge for $315 million, subject to customary adjustments. Kanebridge sells only to distributors, stocks more than 44,000 commercial and military-grade fastener SKUs in warehouses in Illinois and California, and runs a proprietary digital ordering platform. Hillman says the deal raises its industrial addressable market by about $1 billion to about $3 billion, and it expects margin and earnings accretion from sourcing savings, cross-selling and tax benefits. Funding came from cash, a draw on its asset-based revolver and a $200 million term loan add-on priced at SOFR plus 200 basis points. Hillman’s filing shows the deal closed on August 28, and the company announced completion on September 3. Jefferies advised Hillman; Piper Sandler advised Kanebridge.

Distribution Solutions Group. DSG’s controlling shareholder, LKCM Headwater (about 79% owner), agreed in July to buy the rest of the company for $35 per share in cash, about an 81% premium to the March 13 close of $19.31 before its proposal became public. The initial proposal was $29.50. The deal still needs, among other conditions, approval from a majority of votes cast by unaffiliated holders. Meanwhile DSG kept buying: American Fasteners Corp. (September 2; three South Florida locations, more than 11,000 customers, folded into Lawson Products) and, in late October, GradeEight Holdings, the parent of MRO distributor Winzer and FastServ Supply, for about $145 million on roughly $110 million of sales. The GradeEight deal is MRO rather than fastener-specific. DSG also enlarged its revolver by $255 million to $400 million, which signals more bolt-ons to come.

Smaller platforms and strategic buyers. Threaded Fasteners Inc., an employee-owned distributor and manufacturer based in Mobile, Alabama, closed its purchase of TSA Manufacturing on January 5 to bring in-house a supplier whose products it already distributed (sources differ on whether this was its ninth or tenth acquisition since 2012). Rox Capital Partners bought Dallas-based Interstate Threaded Products on June 11 to launch an industrial fastener platform it plans to grow through add-ons. In October, All State Fastener of Michigan said it is actively seeking established fastener and component distributors to acquire, with Mexico and the Northeast targeted for 2027.

6. Asia

Publicly reported Asian fastener deals were sparse in the English-language sources. The notable one is Skipper Ltd’s board-approved purchase of 100% of Sansha Fastener Pvt Ltd, a Tamil Nadu manufacturer, for about ₹15.5 crore, expected to close by December 31, 2026, to add fastener capacity in South India. Taiwan’s trade press, meanwhile, framed the year as one of mounting pressure on exporters, which is the kind of environment that often precedes consolidation and outbound buying.

7. Themes

1. Premiums follow certification and backlog. The aerospace deals were priced at levels (about 18x EBITDA for TriMas Aerospace; about 4x revenue for CAM) that distribution and commodity-fastener deals are unlikely to approach.
2. Carve-outs supply the pipeline. Stanley Black & Decker, TriMas, Optimas Solutions and SFS each shed assets to simplify or delever, and buyers with focused fastener strategies absorbed them.
3. Private equity runs a platform-and-add-on playbook. Rox, Exponent and LKCM (through DSG) are all structured to keep buying.
4. Distribution is moving toward scale and vertical integration. Hillman’s entry into master distribution and Threaded Fasteners’ move upstream into manufacturing point in the same direction: control more of the supply chain.
5. Financing remained available. Howmet’s blended cost of about 4.2% and Hillman’s SOFR plus 200 basis point term loan suggest credit markets did not constrain strategic buyers.

8. What to watch

• Whether the DSG take-private closes on the announced terms.
• Confirmation of the SFS and Heartland closing, and any further SFS aerospace purchases.
• Integration of Kamax into Fontana, particularly plant rationalization in Europe.
• Hillman’s progress on promised synergies at Kanebridge.
• Whether PennAero pursues further aerospace add-ons now that it has scale.
• Acquisitions by Optimas International and All State Fastener, both of which have publicly said they are shopping.
• The EU CBAM proposal and further tariff or court developments affecting import-dependent distributors.