A standard by this designation might cover:
Once you locate a legitimate jis b 1188 pdf, here is the exact data you can expect to find. The document is typically 15-20 pages long and includes:
To help you verify if you have the right PDF, here is a sample comparison: jis b 1188 pdf
| Parameter | JIS B 1188 (2003) | ISO 1207 | Old JIS (pre-1980) | | :--- | :--- | :--- | :--- | | Head diameter (M3) | 5.5 mm – 5.8 mm | 5.5 mm – 5.8 mm | 5.2 mm – 5.5 mm | | Head height (M3) | 1.65 mm – 1.85 mm | 1.65 mm – 1.85 mm | 1.5 mm – 1.7 mm | | Slot width (M3) | 0.8 mm – 1.0 mm | 0.8 mm – 1.0 mm | 0.6 mm – 0.8 mm | | Countersunk angle | 90° | 90° (ISO 2009/2010) | 82° or 90° (mixed) |
Notice that modern JIS B 1188 matches ISO for pan heads, but countersunk heads still have subtle differences in head depth. Only the official PDF reveals these tolerances. A standard by this designation might cover: Once
The objective of this report is to provide an overview of a standard related to hydraulic equipment, assumed to be similar to JIS B 1188.
JIS B 1188 is copyright-protected and not freely available. Legitimate PDF copies can be purchased from: ⚠️ Warning : Free PDFs found on file-sharing
| Source | Price (approx.) | Format | |------------|---------------------|-------------| | Japanese Standards Association (JSA) Web Store | JPY ~2,100 (~USD 15) | PDF with DRM | | ANSI Webstore (for US) | USD ~45 | Watermarked PDF | | Techni-Pak (reseller) | Varies | PDF or hard copy |
⚠️ Warning: Free PDFs found on file-sharing or academic websites are likely outdated (e.g., JIS B 1188:1995) or pirated copies. Using them for commercial purposes may violate copyright laws.
The standard applies to metric hexalobular socket head cap screws with:
It does not cover countersunk or low-profile hexalobular screws (those are covered by JIS B 1194 and JIS B 1195, respectively).