Jis B 1188 Pdf (VALIDATED • 2027)

| | Details | |------------|--------------| | Standard number | JIS B 1188 | | Title | Fasteners – Hexalobular socket head cap screws | | Current version (as of 2026) | JIS B 1188:2014 (confirmed) | | Corresponding international standard | ISO 14579 (modified adoption) |

Used in assembling machinery covers and light structural components. How to Acquire the JIS B 1188 PDF

Kenji sighed. He wasn't worried about the seals or the springs. He was worried about the housing. The casing had cracked, and he had managed to salvage it by machining a new flange, but he needed to bolt it back together with precision. If the torque was off, the pressure would blow the seals out within an hour of operation. If the bolts were too tight, the cast iron would spiderweb with new cracks.

If you are looking for specific dimensional data or need help finding the equivalent ISO standard for a design project, tell me: jis b 1188 pdf

Designed to "cam out" (the screwdriver slips out of the head under high torque) to prevent over-tightening.

The standard covers both steel and brass screws intended for general-purpose applications. The most common configuration is a machine screw combined with one or two captive washers. Standard Specifications Material Carbon steel (Class 4.8), Stainless steel (A2), and Brass Head Type Pan Head (Small pan head is 5%–20% smaller than standard) Washer Types

Engineers sourcing or designing parts to match JIS B 1188 must reference specific mechanical properties and dimensional constraints defined in the standard's data sheets. Standard Specifications Typically ranges from coarse metric threads M2 to M12. Material Options He was worried about the housing

JIS B 1188 specifies several standard configurations, usually denoted by suffixes or type codes in manufacturing catalogs: Type / Suffix Screw Head Included Washers Captive Flat Washer only P=2 Captive Spring Lock Washer only P=3 Captive Spring Lock Washer + Flat Washer P=4 Captive Conical (Belleville) Washer I=3 Binding Head Captive Spring Lock Washer + Flat Washer 3. Dimensions and Technical Specifications

Generally available in steel (Property Classes 4.8, 8.8, 10.9) and stainless steel (A2-50, A2-70).

The most common head style, providing a low profile with a flat top surface. If the bolts were too tight, the cast

JIS B 1188 is often categorized into specific types based on the washer assembly:

Provides a bright, decorative metallic finish with moderate wear resistance.

For professionals needing the complete, authoritative document, the official PDF is available for purchase exclusively from authorized standards resellers such as the JSA Web Store, ANSI Webstore, GlobalSpec, and Accuris. Given the standard’s relatively modest length (25 pages), purchasing the official version is both affordable and strongly recommended to ensure compliance with current requirements.