ICS 21.060.20
Vierkant-Schweißmuttern
DEUTSCHE NORM January 2000
928
{
Continued on pages 2 to 5.
Translation by DIN-Sprachendienst.
In case of doubt, the German-language original should be consulted as the authoritative text.
Square weld nuts
Supersedes
February 1998 edition.
In keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker.
Foreword
This standard has been prepared by Technical Committee Schrauben und Muttern mit Außenantrieb of the Normenausschuss Mechanische Verbindungselemente (Fasteners Standards Committee).
In the May 1970 edition of this standard, nuts of property class 8 (‘weldable’) were specified. Since then,proof loads have been increased and new nut heights specified both in International and European Stand-ards (cf. DIN EN 20898-2).
It did not seem advisable to adapt the nut heights to those of nuts with full loadability, since weld nut mounting is largely automated. Changing the nut dimensions would thus have given rise to considerable difficulties (retooling), which would not have been offset by the advantage of a slightly higher resistance to stripping.
Instead, this standard specifies steel with a maximum carbon content of 0,25% and proof loads which are deemed sufficient for weld nuts to be used together with bolts of property classes lower than 8.8. Weld nuts with a higher loadability are specified in DIN 977.
The DIN 4000-2-9.4 tabular layout of article characteristics shall apply to nuts covered in this standard.Amendments
This standard differs from the February 1998 edition in that the designation of a square weld nut with UNF thread has been specified and some editorial amendments have been made.
Previous editions
DIN 928: 1970-05, 1983-08, 1998-02.
All dimensions are in millimetres.
1Scope
This standard specifies requirements for sizes M4 to M16 coarse and fine pitch thread square weld nuts of product grade A, for use with bolts of property classes below 8.8 as specified in DIN EN ISO 898-1.
2Normative references
This standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the titles of the publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies.DIN 13-1General purpose ISO metric screw threads – Nominal sizes for 1mm to 68mm diameter coarse pitch threads
DIN 13-5
General purpose ISO metric screw threads – Nominal sizes for 1mm and 1,25mm fine pitch threads with diameters from 7,5mm to 200mm
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DIN 928:2000-01DIN 13-6
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General purpose ISO metric screw threads – Nominal sizes for 1,5 mm fine pitch threads with diame
ters from 12 mm to 300 mm
DIN 13-15ISO metric screw threads – Fundamental deviations and tolerances for screw threads of
1 mm diameter and larger
DIN 267-2Fasteners – Technical delivery conditions – Product grades and tolerances DIN 929Hexagon weld nuts DIN 977Hexagon weld nuts with flange DIN 4000-2Tabular layouts of article characteristics for bolts, screws and fit bolts DIN EN 20898-2Mechanical properties of fasteners – Part 2: Nuts with coarse pitch thread and specified
proof load values (ISO 898-2:1992)
DIN EN ISO 898-1Mechanical properties of fasteners made of carbon steel and alloy steel – Part 1: Bolts,
screws and studs (ISO 898-1:1999)
DIN EN ISO 898-6Mechanical properties of fasteners – Part 6: Nuts with fine pitch thread and specified
proof load values (ISO 898-6:1994)
DIN EN ISO 3269Fasteners – Acceptance inspection (ISO/DIS 3269 : 1998)*)DIN EN ISO 4042Fasteners – Electroplated coatings (ISO 4042:1999)
DIN EN ISO 4759-1Tolerances for fasteners – Part 1: Bolts, screws, studs and fit bolts – Product grades A,
B and
C (ISO/DIS 4759-1:1997)*)
ISO 8992:1986Fasteners – General requirements for bolts, screws, studs and fit bolts ANSI B1.1-1989Unified inch screw threads (UN and UNR thread form)1)
3Dimensions
The design shown is for illustrative purposes only, but the dimensions of nuts shall be as specified.
Figure 1:Nut dimensions (notation)
*) Currently at draft stage.
Detail X
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DIN 928:2000-01
4
Technical delivery conditions
4.1General requirements General requirements for standardized bolts, screws, studs and nuts are specified in ISO 8992.
4.2
Material
Weld nuts shall be made of steel with a maximum carbon content of 0,25%. If a specific steel grade is required,this shall be agreed on ordering.
4.3Design
Weld nuts shall be of product grade A conforming to DIN EN ISO 4759-1 or DIN 267-2, with diameters and pitches in accordance with DIN 13-1 (coarse thread) or DIN 13-5 and DIN 13-6 (fine thread), tolerance class 6G Table 1:Nut dimensions
Thread size
b
d 2d 3d 4
e h 1d 1d 1 × P 1)
Limit de-H13Max.Min.Min.±0,1viations
M4––0,854,26,490,6M5––1±0,1565,258,2120,8M6––1,27,56,39,1130,8M8M8 × 1–1,5108,412,8181M10M10 × 1,25
抚顺市
M10 × 11,812,510,515,6221,2––7/16-20 UNF-2B 2)1,812,511,715,6221,2––7/16-20 UNF-2B 2)
2±0,213,511,717,4251,4M12M12 × 1,25M12 × 1,5
213,512,617,4251,4(M14)(M14 × 1,5)–2,516,814,720,4281,4(M16)
(M16 × 1,5)
–
2,5
18,8
16,8
22,4
32
1,6
Thread size
h 2
m s Approx. mass, in kg,d 1d 1 × P 1)Min.
Max.h14h14per 1000 units
M4––0,41,33,570,81M5––0,61,54,291,7M6––0,71,85102,4M8M8 × 1–1,12,06,5146,5M10
M10 × 1,25
M10 × 1
1,252,281711,3––7/16-20 UNF-2B 2)1,252,291712,5––7/16-20 UNF-2B 2)
1,753,091916,5M12M12 × 1,25M12 × 1,5
1,753,09,51916,6(M14)(M14 × 1,5)–1,753,211,42226,7(M16)
(M16 × 1,5)
–
2,0
4,0
13
24
35,8
Bracketed sizes should not be used.1)Thread pitch.
2)Thread series to ANSI B1.1; only to be used for fastening of seat belts in motor vehicles.
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DIN 928:2000-01
4.4Mechanical properties
If the proof load test specified in DIN EN 20898-2 or DIN EN ISO 898-6 is carried out, the loads given in table 2shall be used. In case of dispute, welding projections shall be removed prior to testing.
Table 2:Proof loads
4.5Surface finish
As a rule, square weld nuts are to be supplied uncoated. Electroplated coatings shall comply with the speci-fications given in DIN EN ISO 4042.
Since uncoated weld nuts may be affected by corrosion during transit or storage, the manufacturer shall provide corrosion protection that does not impair nut weldability.
4.6Acceptance inspection
Acceptance inspection shall comply with the specifications given in DIN EN ISO 3269.
5Designation
Designation of a size M10 square weld nut made of steel (St):安徽
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Nut DIN 928 – M10 – St
If a square weld nut with UNF thread is to be supplied, the width across flats shall be included in the designation.EXAMPLE:
Designation of a size 7/16-20 UNF-2B square weld nut, made of steel (St), with a width across flats of 17 mm (SW17):
Nut DIN 928 – 7/16-20 UNF-2B – SW17 – St
6
Marking
Square weld nuts of sizes M5 and above shall be imprinted with the manufacturer’s symbol.
Coarse thread
Proof load,
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Fine thread Proof load,
(size)
in N
(size)
in N
M46800––M511000––M615500––M828300M8×130200M1044800M10×150200––M10×1,2547800––7/16-20 UNF-2B 53600M1265300M12×1,2572100––M12×1,568200M1489700M14×1,597500M16
123000
M16×1,5
132000
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005-03-15 12:15大连到烟台汽车
轮渡价格表
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DIN 928:2000-01
Figure 2:
Indication on drawings
7Indication on drawings
8
Connecting dimensions
Figure 3:Connecting dimensions (nut not welded on)
Table 3:Connecting dimensions
罗浮山有什么好玩的Thread size as in table 1
Plate thickness, a Hole diameter, d 51)
d 1d 1×P Min.
Max.(H11)M4––0,751,56M5––0,8827M6––0,882,58M8M8×1–1310,5M10M10×1,25
M10×1
1,25412,5––7/16-20UNF-2B 1,25413,5M12M12×1,25M12×1,5
1,5514,8M14M14×1,5–2616,8M16
M16×1,5
–
2
6
18,8
1)
To ensure interchangeability, the hole diameters correspond to those of hexagon weld nuts as specified in DIN 929. They are, however, not design requirements, and therefore, other hole diameters are permitted.
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