This standard specifies the types and sizes of drain, filling and level plugs and hand tool matching parts of earth-moving machinery. This standard applies to drain, filling and level plugs used to replace lubricating oil, coolant, hydraulic oil and fuel. GB/T 14780-1993 Earth-moving machinery drain, filling and level plugs GB/T14780-1993 standard download decompression password: www.bzxz.net

UDC624. 078.42
National Standard of the People's Republic of China
GB/T14780-93
Wang Fang Machinery
Drain, fill and level plugs
Earth-moving machinery---Drainfill and level plugs
1993-12-27 Issued
State Bureau of Technical Supervision
1994-08-01 Implementation
National Standard of the People's Republic of China
Drain, fill and level plugs
Earth-moving machinery
Earth-moving machinery-Drain, Fill and level plugs
GB/T 14780—93
This standard is equivalent to the international standard ISO6302-1992 "Earth-moving machinery-Drain, fill and level plugs". Subject content and scope of application
This standard specifies the types and sizes of drain, filling and level screws and hand tool matching parts of earth-moving machinery. This standard is applicable to drain, filling and level screws for replacing lubricating oil, coolant, hydraulic oil and fuel. 2 Types and main dimensions
2.1 Type A and Type B (see Figure 1, Figure 2 and Table 1)ZG
Taper thread
ZG1/8\
ZG3/g%
Square countersunk dimensional screw plug
Counterbore width
Approved by the State Bureau of Technical Supervision on December 27, 1993A
Counterbore depth
(minimum)
External hexagonal tapered screw plug
Head width
Head commercial length
Implementation on August 1, 1994
Taper pipe thread
ZG3/4*
ZG IA\
Corresponding, T.
Counterbore width
Note: The ruler in the figure is the nominal ruler of the tool. ②The dimension values ​​in the table are nominal values.
2.2 Type C and D (see Figures 3, 4 and Table 2)
Square countersunk screw plug
M12×1.25
Counterbore width
GB/T 14780-93wwW.bzxz.Net
Continued Table 1
Counterbore depth
(minimum)
Socket wrench
Counterbore depth
(minimum)
Head width
Head width
Dual-purpose wrench vs. single-head wrench
Hexagonal screw plug
Head width
Head width
M20× 1.5
M48 x 1. 5
Corresponding T-tool
Counterbore width
Note: (The dimensions in the figure are the nominal dimensions of the tool! ②The dimensions in the table are nominal values.
3Application
GB/T 14780-93
Continued Table 2
Counterbore depth
t.(minimum)
Sleeve level
Select the screw type according to the different use parts. Table 3
Easily damaged parts
Parts that need to be cleaned
Parts that need to be disassembled and installed regularly
Parts that are rarely disassembled and installed
Additional instructions:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is issued by the Beijing Institute of Construction Machinery of the Ministry of Construction. Head width
Head height
Combination wrench or single-head wrench
Screw plug type
Type A, C (Type C is preferred)
Type A, C (Type C is preferred)
This standard is proposed by the Ministry of Construction Beijing Construction Machinery Research Institute drafted this standard. The main drafter was Ma Hongzhong.
(Beijing) Xindengzi No. 023
People's Republic of China
National Standard
Earthmoving machinery drainage, filling and level plug GB/T14780-93
Published by China Standards Press
(Beijing Fuwai Sanlihe)
China Standards Press Beijing Printing Factory Printed by Xinhua Bookstore Beijing Distribution Office Sold by Xinhua Bookstores in various places Copyright is exclusive and cannot be reproduced
Format 880×123) 1/16 Printing sheet 1/2 Number of words 6,000 words June 1994 Edition June 1994 First printing Printing number 1-2CO
Book number: 155066: 1-10661
Price 1.50 yuan
Standard H241
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