Solar · Below the rail
Catalog fasteners for racking, carport, ground-mount and roof-attachment builds, made to the published standard: ASME B18, ASTM F593 / F594, DIN and ISO. Made in Taiwan by an IATF 16949 fastener mill. The standard is the drawing, so you can quote it without sending us a print.
Meeting at RE+ Las Vegas? We are on the floor Wednesday, November 18. Send the BOM or the hardware list ahead and we will bring answers rather than a brochure. Book a time through the enquiry form →
Lead with the joint
One mill, one alloy, one serration pattern, quoted on one sheet. The 316 serrated hex flange bolt mates the 316 serrated flange lock nut, so the bearing faces were made to work together rather than sourced from two vendors and hoped for.
What we do not quote
Module clamps, mid and end clamps, bonding hardware and any rail-specific or listed proprietary assembly. That zone belongs to the racking OEM and its patents. We supply the standard hardware below the rail: foundation, post, beam, purlin, splice, brace, carport frame and roof attachment.
Hardware families
| Family | Standard | Material / finish |
|---|---|---|
| Serrated flange bolt | DIN 6921 · ASME B18.2.1 | 316 SS, passivated. Metric M8-M12; inch 5/16-18 |
| Serrated flange lock nut | DIN 6923 / ISO 4161 · ASME B18.2.2 | A4-80 metric; 316 SS inch |
| Hex cap screw, stainless | ASME B18.2.1 · ASTM F593 | 316 SS, passivated per ASTM A967. 1/4-20 to 1-8 |
| Hex cap screw, carbon | ASME B18.2.1 · ASTM A307 Gr A | Hot-dip galvanized per ASTM A153. 1/2-13 to 1-8 |
| Carriage bolt | ASME B18.5 · DIN 603 | A307 Gr A, HDG. 3/8-16 to 3/4-10 |
| Hex lag screw | ASME B18.2.1 | 316 SS, passivated. 5/16 and 3/8 diameter |
| Self-drilling screw | SAE J78 | 410 SS, hex washer head, plain or with bonded EPDM washer. #12 and 1/4 in |
| Socket set screw, cup point | ASME B18.3 | 316 SS. 3/8-16 and 1/2-13 |
| Nylon-insert lock nut | ASME B18.16.6 · DIN 985 | 316 SS, clean finish. 3/8-16; M8 / M10 |
| Square washer | DIN 436 | 304 SS. M10 and M12 (clear 3/8 and 1/2 bolts) |
| U-bolt for round pipe | To HA print | Stainless bar, with flange nuts and washers. Sized to pipe OD |
Other families built to a published standard, including ASTM F1554 anchor bolts, flat and lock washers and ISO metric equivalents, can be asked for. We confirm whether the mill will quote a family before you spend time on it.
Made in Taiwan. The country of origin is stated on every quotation, line by line. If your project carries an origin or domestic-content requirement, tell us at the RFQ and we will say plainly whether a part can meet it.
Plan on 150-200 days from sample approval on the stainless lines. First-article approval comes before that clock starts. This is a program supply, not a distributor shelf; we state the lead time per line on the quote.
The mill is IATF 16949 certified and tests in-house: tensile, hardness, thread form and salt spray. Material certs and test reports are available per lot. Certification detail.
How to get a quote
Standard, size, length, material and finish per line. Your internal part numbers are fine; we cross them to the published standard.
Pricing is tiered by volume. Annual usage per size lets us quote the right tier the first time.
Domestic-content language, coastal exposure (304 versus 316), finish or cert requirements. Say it up front so the quote answers it.
We quote below-the-rail standard hardware with the origin stated on every line. If a part is not a fit for this mill, we say so on the first reply.
