JB/T 7384.14-1994 Fasteners Wood screw thread minor diameter caliper

This standard specifies the type and size of special calipers for detecting the minor diameter of wood screw threads. This standard applies to item 6 of table 1 of ZB J13 002.2. JB/T 7384.14-1994 Fasteners Wood Screw Thread Minor Diameter Caliper JB/T7384.14-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T7384.1～7384.18-94
Special Inspection Fixtures for Fasteners
Published on 1994-07-26
Ministry of Machinery Industry of the People's Republic of China
Implementation on 1995-07-01bzxZ.net
Mechanical Industry Standard of the People's Republic of China
Caliper for Minor Thread Diameter of Wood Screws
Subject Content and Scope of Application
This standard specifies the type and size of special calipers for detecting minor thread diameter of wood screws. This standard applies to item 6 of Table 1 of ZBJ13002.2. 2 Reference Standards
GB1214
Vernier Caliper
ZBJ13002.2 Fastener Test Method Size and Geometric Accuracy of Wood Screws Type and Size
The type and size of special calipers for minor thread diameters are as specified in Figure 1. (The angle of the outer jaw edge of the GB1214-75 vernier caliper is made as shown in Figure A-A). mgngiahgaabd
6=0.4 is applicable to 2.5 and below specifications; 6=0.6 is applicable to 3 and above specifications. JB/T7384.14-94
1—Inner measuring blade, 2—Ring frame, 3—Fixing nails: 4—Vernier: 5—Ring body; 6—Depth gauge; 7—External measuring machine Approved by the Ministry of Machinery Industry on July 26, 1994
Implementation on July 1, 1995
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