Stainless Steel Bolts — 300 / 400 Series & Precipitation-Hardening Grades
Stainless Steel Bolts
Full-range stainless-steel bolts across austenitic, ferritic, martensitic, and precipitation-hardening grades — matched to the corrosion, strength, magnetic, and machinability requirement of each application.
Baseline grades (304 / 316 / 410) in common head and length combinations ready within standard lead time; custom specs (thread class, head geometry, hardness treatment, non-standard grades) supplied per programme. Specifications to JIS, ANSI, ISO, B.S., or DIN.
Why source through Way Fast
We serve Tier 1 and Tier 2 automotive suppliers — primarily to North American OEM programs, including platforms shared with European and Japanese brands — with day-to-day experience handling the documentation and tolerance standards these projects demand.
01 · Multi-source capacity
Working with multiple qualified manufacturing partners — we match each order to the best-fit production line, stabilizing lead times and cost when single-source capacity tightens.
02 · Submission-grade documentation
Full support for PPAP (Levels 1–3), IMDS submission, and RoHS / REACH documentation.
03 · Audited special-process chain
Partners certified to AIAG CQI-9 (heat treat), CQI-11 (plating), and CQI-12 (coating) — covering the full post-processing chain under audited special-process controls.
04 · Multilingual drawing review
Technical drawing review in English, German, Japanese, and Chinese — including ISO 8015 GPS callouts, JIS standards, thread tolerance classes, and coating specifications.
05 · Grade selection and stock availability
Grade selection matched to environment (marine / chlorinated / food contact / chemical / magnetic sensitivity) and strength requirement — drawing-reviewed against customer environmental spec. Baseline 304 / 316 / 410 in common head-and-length combinations supplied within standard lead time; non-standard grades (305, 420, 430, 630 / 17-4 PH) and custom combinations supplied per programme.
Family coverage · 3 groups
Selecting across stainless-steel grade families
Austenitic (300 series)
302 / 304 / 305 / 316 · non-magnetic
Standard corrosion-resistant grades, non-magnetic, good formability. 304 for general-purpose; 316 for marine, chlorinated, or chemical environments; 305 for cold-heading larger bolts where 304 would work-harden; 302 for high-strength fasteners.
Ferritic & Martensitic (400 series)
410 / 420 / 430 · higher strength
Magnetic stainless grades. 410 / 420 heat-treatable martensitic — higher tensile strength than 304 with moderate corrosion. 430 ferritic for cost-balanced applications where non-magnetic response is not required.
Precipitation-hardening (SUS 630 / 17-4 PH)
High strength + corrosion
17-4 PH combines austenitic corrosion with martensitic strength after age-hardening. Tensile above 1,200 MPa achievable. For aerospace, marine, or aggressive environments where 300-series strength is insufficient.
Sizes
M1.2 – M25 · #000 – 1″
Lengths
2 – 250 mm · 1/16″ – 10″
Material
SUS 302, 304, 305, 316, 410, 420, 430, 630 (17-4 PH) — standard stock; custom grades per customer specification.
Finishes
Passivation (ASTM A967) standard; electropolishing, nickel plating, or custom finish per drawing.
Head types
Hex, socket, pan, flat, button, countersunk, truss, or per drawing.
Drive
Phillips, Pozidriv, Torx®, slotted, hex socket, external hex, or per drawing.
Lead times
Quotation and production
Quotation
Within 5–7 business days from receipt of drawing and specifications.
Sample & production
Schedules issued per project.
Send your drawing, grade spec, and quantity (small batches welcome) — baseline grades quoted against standard lead time; custom specs and non-standard grades quoted per programme.
Standard and custom stainless-steel fasteners supplied through qualified manufacturing partners. PPAP / IMDS / RoHS / REACH documentation per customer program.
