Market Data

What the Fastener PPI Is, and Why Its 330.87 Reading Sets Your Bolt Prices

A plain-English guide to the BLS Producer Price Index for bolts, nuts, screws, rivets and washers: what it tracks, how it is built, and which cost inputs actually move it.

The PPI for Bolts, Nuts, Screws, Rivets, and Washers is a Bureau of Labor Statistics index (1982=100) of the prices U.S. fastener producers receive at the factory gate. It reads 330.87 as of May 2026, meaning fastener prices are about 3.3 times their 1982 level, with the trend falling and the index down about 3.5% from a year ago. It is the closest thing to an official price of the hardware that holds everything else together.

What the survey actually captures

Each month the BLS collects net transaction prices, actual selling prices, not catalog list, from U.S. fastener manufacturers across the product family: bolts, nuts, screws, rivets, and washers, in the grades and finishes the industry ships. Those quotes are weighted by shipment value and chained into one index scaled to 1982=100. Two boundaries matter for reading it. It is a producer price, measured at the factory gate, so distributor markup, often substantial in fasteners, where distribution does the stocking, kitting, and certification work, sits on top of it. And it covers domestic production, so the large imported share of the U.S. fastener market disciplines the index through competition rather than appearing in it directly. What the number tracks, in short, is the pricing power of American fastener makers.

The cost stack underneath a bolt

A fastener is steel wire rod plus a chain of conversions, and the index moves with each link. Rod and bar stock is the dominant material input, which is why this series shadows the steel mill products PPI with a lag of a few months. Cold heading, forming the head and blank at high speed, is capital- and tooling-intensive, so machine amortization and die costs sit in every piece price. Thread rolling, heat treatment, and plating each add energy-heavy steps; zinc, cadmium-alternative, and coating chemistry costs ride along. Labor is a smaller share than in castings but is skilled and tight. When you see the index sliding, the usual suspects are wire rod and energy first, with pricing power and import competition deciding how much of the input move survives into the factory-gate price.

PPI, bolts, nuts, screws, rivets and washers, May 2026: 330.87. The archived history spans 330.57 in Apr 2026 to 349.35 in Jan 2026; the latest reading sits 2% of the way up that range.

A fastener is steel wire rod plus a chain of conversions, and the index moves with every link.

Reading it against your own hardware spend

The index earns its keep as a benchmark. An assembler buying $150,000 of fasteners a year has watched the series go down about 3.5% from a year ago (-3.5%); if purchased prices tracked it, that repriced the hardware line by about $5,178 over twelve months, in the direction of the index. Fasteners are a classic tail-spend category, thousands of line items, none individually material, which is exactly why a single public benchmark is valuable: it tells you whether a distributor's across-the-board increase matches the market or exploits the fact that nobody audits the small stuff. Now you can.

Run the fastener cost per unit calculator to break a quoted price into material, forming, plating, and packaging, and benchmark it against the index. Audit a fastener price

Published 2026-07-13.