This standard specifies the types and dimensions of locking wire screw inserts with the mounting handle removed (or not removed) as required after assembly. This standard is applicable to gas turbine power plants and can also be used as a reference for other machines with similar requirements. JB/T 7604.1-1994 Types and dimensions of locking wire screw inserts JB/T7604.1-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T7604.1~7604.4-94
Locked Wire Screw Insert
Published on December 9, 1994
Implemented on June 1, 1935
Ministry of Machinery Industry of the People's Republic of China
JB/T7e04.1--94
JB/T 7604.2-94
JB/T7604.3-94
JB/T 7604,4-94
Types and dimensions of locking wire screw inserts
Internal thread for installing wire screw inserts.
Locking wire screw inserts
Locking wire screw inserts
Technical conditions
Installation requirements
Standards of the Machinery Industry of the People's Republic of China
Locking wire screw inserts
Subject content and scope of application
Types and dimensions
JB/T 7604.194bzxZ.net
This standard specifies the types and dimensions of locking wire screw inserts whose mounting handles need to be removed (or not removed) as required after assembly. This standard is applicable to gas turbine power plants, and other machinery with similar requirements can also be used as a reference. 2 Reference standards
GB1237
JB/T7604
Types and dimensions
Marking method for fasteners
Technical conditions for locking wire screw inserts
The screw insert types are shown in the figure.
When measuring F, use
Process assurance
3.2 Specifications and dimensions of screw inserts are in accordance with Tables 1 and 2. Approved by the Ministry of Machinery Industry on December 9, 1994
Number of free state circles
Number of locking circles
Number of locking edges K
Both ends can be made
vertical or at any angle
Implemented on June 1, 1995
Nominal diameter×pitch
M12×1.25
(M14×1.5)
(M22×1.5）
(M27X2)
(M30×3)
(M33×3)
M36×3
(M39×3)
M42×3
(M45×3)
Free state outer diameter Dz
JB/T7604.1—94
Guide dimension F
Mounting handle length T
Broken groove depth n
Broken groove position α
Mounting handle rotation
Connecting arc R
Nominal diameter X pitch
(M48×3)
M52×3
Free state outer diameter Dz
JB/T7604.1--94
Continued Table 1
Guide dimension F
Note: Specifications in brackets in the table should not be selected as much as possible. Nominal diameter×pitch
M10×1
Locking ring structure
Installation handle length T
Broken groove depth n
Free state diagram number N
*101/2
*131/2
11 3/4
Broken groove position α
Nominal length
Mounting handle rotation
Connecting arc R
Weight per 1000 pieces
Nominal diameter X pitch
(M14×1.5)
(M22X1.5）
M24×2
Locking ring structure
JB/T7604.1—94
Continued table 2
Number of free state diagrams N
*127/8
*121/2
*101/2
*141/2
19 3/4
*101/2
*181/2
27 3/4
*101/2
10:1/2
*161/2
27 1/4
Nominal length
Weight per 1000 pieces
Nominal diameter x pitch
(M27×2)
(M30×3)
(M33×3)
M36×3
(M39×3)
(M42×3)
Locking ring structure
JB/T 7604.194
Continued Table 2
Free state figure number N
*131/2
*161/2
10 3/4
Nominal length
Weight per 1000 pieces
Nominal diameter X pitch
(M45×3）
(M48×3）
M52×3
Locking ring structure
The specifications with brackets in the table should not be selected as much as possible. Note:
Specifications with "*" in the table are preferred. ②
JB/T7604.1-94
Continued Table 2
Number of free state diagram N
22 1/2
15 3/4
*241/2
Nominal length = P[N+2（0.25~0.5)]. Technical conditions of screw insert
Technical conditions of screw insert shall comply with the provisions of JB/T7604.3. Marking
Marking shall comply with the provisions of GB1237.
Nominal length
Weight per 1000 pieces
Nominal diameter × pitch dXp is 10, number of free state turns N=81/2, material is 1Cr18Ni9TiLocked wire thread insert marking example:
Thread insert JB/T7604.1M10—81/21Cr18Ni9TiNominal diameter × pitch dXp is 10X1, number of free state turns Nmx=131/2, material is GH4145, surface treatment is silver plating, locked wire thread insert marking example:
Thread insert JB/T7604.1M10X1-131/2-AgGH4145Additional instructions:
This standard is proposed by the Ministry of Machinery Industry.
This standard is under the jurisdiction of Nanjing Gas Turbine Research Institute. This standard was drafted by Nanjing Steam Turbine Electric Machine Factory. The main drafters of this standard are Deng Aiping and Yu Weihua.
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