If you’re searching for a bolts for lawn mower handle supplier, you’re really looking for a maker who understands outdoor power equipment, not just a catalog. YZ Fastener’s CHIPBOARD SCREWS might sound “furniture,” but in fact they’re often specified for mower handle grips, cable clips, accessory brackets, and even the wooden crates that ship units worldwide. Different use, same science: consistent threads, proper case hardening, and coatings that don’t quit when it rains for a week.
Origin: Southwest of Road Taibai, Yongnian District, Handan City, Hebei Province, China. These self-tapping screws (DIN 7505 style) feature fine or Hi-Lo threads for particleboard, plastics, and light-gauge sheet where pilot control matters. Many customers say the drive-in feel is “predictable” — which is code for fewer stripped heads on the line.
| Parameter | Spec (≈ real-world use may vary) |
|---|---|
| Material | C1022 case-hardened steel; 410 stainless optional |
| Diameter × Length | Ø3.0–6.0 mm × 12–120 mm |
| Heads / Drives | Countersunk, wafer, pan; Phillips, Pozidriv, Torx |
| Thread | Coarse or Hi-Lo, sharp point, self-tapping |
| Coating | Zn, Zn-Ni, Ruspert, black oxide per ISO 4042 |
| Corrosion | ≥240 h NSS zinc; up to ≈1,000 h Ruspert (ISO 9227) |
| Typical Torque | 4.0×40 mm: ≈2.5–4.5 N·m into 18 mm particleboard |
For the main steel handle-to-deck joint you’ll still want bolts and locknuts. But for the smaller stuff, these screws are fast and surprisingly durable.
Wire drawing → cold heading → thread rolling → case hardening (ISO 2702) → tempering → finishing (ISO 4042) → 100% visual + sampling by torque/pull-out → packaging. Salt-spray per ISO 9227/ASTM B117. Pull-out tests in PB per EN 320. Expected service life: indoor assemblies 5–10 years; outdoor mower accessories ≈2–5 years Zn, up to ≈5–8 years with Ruspert — climate dependent.
Head logo, non-standard lengths, tinted coatings, waxed finish for consistent driving torque, taped collations for automation, and small kitting for service packs. Lead times around 15–30 days depending on finish (Ruspert is the long pole, to be honest).
| Vendor | Certs | MOQ | Lead Time | Coatings | QC & Test |
|---|---|---|---|---|---|
| YZ Fastener (bolts for lawn mower handle supplier) | ISO 9001; supplier PPAP on request | ≈50k pcs/size | 15–30 days | Zn, Zn-Ni, Ruspert, black | NSS, torque, pull-out, hardness |
| Importer A | Unknown | Low | Stock/variable | Mostly Zn | Basic visual only |
| Local Hardware B | — | No MOQ | Immediate | Retail coatings | No lab data |
- European mower OEM: swapped to Torx wafer-head with Ruspert; line rework fell by ~35%, crate failures virtually disappeared.
- North American assembler: moved cable-clip fastenings from machine screws + nuts to Hi-Lo chipboard screws in composite brackets; takt time improved ~12%.
It seems small hardware choices ripple through warranty metrics. Surprisingly often.
References:
[1] DIN 7505 – Chipboard screws.
[2] ISO 2702 – Heat treatment of steel tapping screws.
[3] ISO 4042 – Fasteners, electroplated coatings.
[4] ISO 9227 / ASTM B117 – Neutral salt spray testing.
[5] EN 320 – Determination of axial withdrawal of screws in particleboard.