GB/T 822-2016Cheese head screws with cross recess (English PDF)

Foreword

This Standard is one of the serial national standards of "Slotted Screws and Cross

Recessed Screws", which include.

--- GB/T 65 Slotted Cheese Head Screws;

--- GB/T 67 Slotted Pan Head Screws;

--- GB/T 68 Slotted Countersunk Head Screws;

--- GB/T 69 Slotted Raised Countersunk Head Screws;

--- GB/T 818 Cross Recessed Pan Head Screws;

--- GB/T 819.1 Cross Recessed Countersunk Head Screws – Part 1. Class 4.8;

--- GB/T 819.2 Cross Recessed Countersunk Head Screws – Part 2. Steel of

Property Class 8.8, Stainless Steel Screws and Non-ferrous Metal Screws;

--- GB/T 820 Cross Recessed Raised Countersunk Head Screws;

--- GB/T 822 Cross Recessed Cheese Head Screws;

--- GB/T 823 Cross Recessed Small Pan Head Screws;

--- GB/T 13806.1 Fasteners for Fine Mechanics – Cross Recessed Screws.

This Standard was drafted as per the rules specified in GB/T 1.1-2009.

This Standard replaced GB/T 822-2000 Cheese Head Screws with Cross Recess; the

major technical changes are as follows.

--- Delete "if other technical requirements are needed,... the selection in GB/T

1 Scope

This Standard specifies the type and dimension, technical conditions and markings of

cheese head screws with cross recess.

This Standard is applicable to Type-H and Type-Z cheese head screws with cross

recess for Thread Specification M2.5~M8, Property Class 4.8, 5.8, A2-70, CU2, CU3

and AL4, Product Grade A.

NOTE. the screw head dimension specified in this Standard equals to slotted cheese head

screws specified in GB/T 65.

2 Normative References

The following documents are essential to the application of this document. For the

dated documents, only the versions with the dates indicated are applicable to this

document; for the undated documents, only the latest version (including all the

amendments) are applicable to this document.

GB/T 90.1 Fasteners – Acceptance Inspection (GB/T 90.1-2002, ISO 3269.2000,

IDT)

GB/T 90.2 Fasteners – Marking and Packaging

GB/T 193 General Purpose Screw Threads – Diameters and Pitches (GB/T 193-

2003, ISO 261.1998, MOD)

GB/T 944.1 Cross Recesses for Screws (GB/T 944.1-1985, eqv ISO 4757.1983)

GB/T 1237 Designation System for Fasteners (GB/T 1237-2000, eqv ISO

8991.1986)

GB/T 3098.1 Mechanical Properties of Fasteners - Bolts, Screws and Studs (GB/T

3098.1-2010, ISO 898-1.2009, MOD)

GB/T 3098.6 Mechanical Properties of Fasteners – Stainless Steel Bolts, Screws

and Studs (GB/T 3098.6-2014, ISO 3506-1.2009, MOD)

GB/T 3098.10 Mechanical Properties of Fasteners –Bolts, Screws and Studs

Made of Non-Ferrous Metals (GB/T 3908.10-1993, eqv ISO 8839.1986)

GB/T 3103.1 Tolerances for Fasteners – Bolts, Screws and Nuts (GB/T 3103.1-

2002, idt ISO 4759-1.2000)

GB/T 5267.1 Fasteners – Electroplated Coatings (GB/T 5267.1-2002, ISO

4042.1999, IDT)

GB/T 5267.2 Fasteners – Non-Electrolytically Applied Zinc Flake Coatings (GB/T

5267.2-2002, ISO 10683.2000, IDT)

GB/T 5267.4 Passivation of Corrosion – Resistant Stainless – Steel Fasteners

(GB/T 5267.4-2009, ISO 16048.2003, IDT)

GB/T 5276 Fasteners - Bolts, Screws, Studs and Nuts - Symbols and Descriptions

of Dimensions (GB/T 5276-2015, ISO 225.2010, MOD)

GB/T 5779.1 Fastener – Surface Discontinues – Bolts, Screws and Studs for

General Requirements (GB/T 5779.1-2000, idt ISO 6157-1.1988)

GB/T 9145 General Purpose Metric Screw Threads - Limits of Sizes for the Screw

Threads of Medium Quality and Preferable Plan (GB/T 9145-2003, ISO 965-

2.1998, MOD)

GB/T 16938 Fasteners – General Requirements for Bolts, Screws, Studs and Nuts

(GB/T 16938-2008, ISO 8992.2005, IDT)

3 Dimension

The types and dimensions of screws can refer to Figure 1 and Table 1.

The dimension codes and markings shall conform to GB/T 5276.

The stem diameter of the part without thread equals to the medium diameter of thread

or allows equaling to the large diameter of thread.

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