1、CEN PREN*3782 92 3404589 0031535 594 = A.E.C.M.A. Technopolis - 175, rue Jean-Jacques Rousseau A. E .C. M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM prEN 3782 Issue P 1 August 1992 EDIT PAR LASSOCIATION EUROPEENNE DES CONSTRLJCTEURS DE MATERIEL AEROSPATIAL Teclnopolic - 175, rue Jean-Jacques Rou
2、sseau - F-92138 Issy-les-Moulineaux Cdex - T1 1) 47 36 98 76 UDC Key words : ENGLISH VERSION Aerospace series Holes for 1 OOo countersunk head screws Design standard Srie arospatiale Trous pour vis tte fraise 100“ Norme de conception Luft- und Raumfahrt Lcher fr 1 OOo Senkschrauben Konstruktionsnorm
3、 This .Aerospace Series. pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Commission follow
4、ing comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and signature of the AECMA St
5、andard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for final vote. Nota - Extra copies can be supplied by 6.M.A.E - Technopolis 54 - 199. riie Jean-Jacque
6、s Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX Edition approved for publication Comments should be sent within six months after the date of publication decision 1992-08-31 C8 Chairman M. WILLIAMS CEN PRENa3782 92 3404589 003153L 420 m- prEN 3782 PaQe 3 1 Scope and field of application This standard sp
7、ecifies holes in common parts and sheet metal for 100 countersunk head screws with nominal diameters of 3 mm to 5 mm and head configuration to EN-standards for aerospace applications. 2 Use 2.1 Normal application Underflush condition i. e. where units are mounted on top of screws, use dimensions P,
8、(see table 1). 2.2 Aerodynamic application Proud to underflush condition i. e. where the screws are adjacent to gaseous flow, use dimensions P, (see table 2). Previous page is blank -_ CEN PREN*3782 2 W 3404583 0031537 3b7 = prEN 3782 Page 4 3 Required characteristics See figures 1 and 2 and tables
9、1 and 2. Dimensions and tolerances are in millimetres. 100“ IO, 5“ a deburred 0,l to 0,5 II P, underf lush condi t ion P, proud to under- f lush condi t on Figure 1 - Countersunk holes in common parts 0,l to 0,s lush condi t ion to under- condi tion Figure 2 - Countersunk holes in sheet metal prEN 3
10、782 Page 5 Table 1 - Hole sizes for normal application (underflush condition) Screw thread Hole Sinking Gauge Depth Pl Diameter I Designation , diameter diameter diameter (HI1) 0.10 to 0.38 I l) For information only. I Table 2 - Hole sizes for aerodynamic application (proud to underflush condition)
11、Depth p2 Screw thread Hole Sinking Gauge (H)li 0.10 proud to 0.13 Diameter Designation diameter diameter diameter code D (Tol.Hl3) (E) 1) G underflush A030 MJ3xOI5-4h6h 3,3 + 0,18 5,75 4,50 1 ,o 0,53 + 0,15 0,83 + 0,15 A040 MJ40,7-4h6h 4,4 + 0,18 7,75 5,78 1,4 A050 MJ50,8-4h6h 5,5 + 0,18 975 7,71 1,
12、8 0,86 + 0,15 For information only. 4 Designation Example : Description block Identity block EN3782N050 Number of this standard Diameter code (see table 1 or table 2) CEN PREN*3782 92 W 340liC89 0031539 13T W prEN 3782 Page 6 5 Indication on drawings Example : HOLE EN3782N050 f- Figure 3 Alternatively the hole may be fully dimensioned on the drawing.
