1、BRITISH STANDARD AEROSPACE SERIESBS 4A 169:2002Amendment No. 1Specification for aluminium alloy bolts (Unified hexagons and Unified threads) for aircraftICS 49.030.20BS 4A 169:2002This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee,
2、 was published under the authority of the Standards Policy and Strategy Committee on 28 January 2002 BSI 2006The following BSI references relate to the work on this standard:Committee reference ACE/12Draft for comment 00/704897 DCISBN 0 580 33292 6Committees responsible for thisBritish StandardThe p
3、reparation of this British Standard was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening, upon which the following bodies were represented:Civil Aviation Authority (Airworthiness Division)Confederation of British ForgersInstitute of PetroleumMinistry of DefenceSociety of Br
4、itish Aerospace Companies Ltd.Amendments issued since publicationAmd. No. Date Comments16376 June 2006 Corrections to Table 2.BS 4A 169:2002 BSI 2006iContentsPage Committees responsible Inside front coverForeword ii1Scope 12 Normative references 13 General requirements 14 Materials and manufacture 1
5、5 Dimensions and tolerances 16 Screw threads 17 Anti-corrosion treatment 18 Hardness values 19 Identification and marking 110 Quality assurance procedure 1Bibliography 15Table 1 Dimensions of bolts 3Table 2 Bearing length L, clamping length M and overall length E 5Figure 1 Dimensions of bolts (see T
6、able 1) 2Figure 2 Bearing length L, clamping length M and overall length E(see Table 2) 4BS 4A 169:2002ii BSI 2006ForewordThis British Standard has been prepared by Technical Committee ACE/12. It is a revision of BS 3A 169:1962 which is superseded and withdrawn.This revision of BS 3A 169 refers to t
7、he relevant requirements in BS A 100. It incorporates amendment 1 of BS 3A 169 and updates and revises material specifications.NOTE Fasteners manufactured to previous editions of this specification may continue to be supplied until stocks are exhausted.A British Standard does not purport to include
8、all the necessary provisions of a contract. Users of British Standards are responsible for their correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, and inside front cover, pages i and
9、 ii, pages 1 to 15 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.BS 4A 169:2002 BSI 200611 ScopeThis British Standard specifies materials and manufacture, dimensions, protective treatment and quality assurance requirements for alumin
10、ium-alloy hexagon-head bolts with unified threads.NOTE The latest edition of an Aerospace Series standard is indicated by a prefix number. 2 Normative referencesThe following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard.
11、 For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. For undated references, the latest edition of the publication referred to applies.BS 3A 100, Specification for general requirements for bolts and free-running nuts of tensile strength not exceed
12、ing 1 249 MPa.BS L 168, Specification for bars and extruded sections of aluminium-copper-magnesium-silicon-manganese alloy (solution treated and artificially aged) (not exceeding 200 mm diameter or minor sectional dimension) (Cu 4.4, Mg 0.5, Si 0.7, Mn 0.8).3 General requirementsBolts shall conform
13、to BS A 100. 4 Materials and manufactureThe bolts shall be machined from bars that conform to BS L 168.5 Dimensions and tolerances5.1 All finished bolts shall conform to the dimensions and tolerances specified in Table 1 and Table 2.5.2 The clamping length of the bolt shall conform to the dimensions
14、 and tolerances specified in Table 2, and shall be such that when a standard nut, without countersink or ring gauge is, screwed on as far as possible by hand, its leading face is within a distance M from the underside of the bolt head. The run-out of the thread shall not exceed twice the thread pitc
15、h. 5.3 The nominal length of the bolt shall be the minimum bearing length L, which is determined by the minimum clamping length, M, less two thread pitches (see Table 2).NOTE The bearing lengths L quoted in Table 2 are in 0.10 inch increments but where a 0.05 length increment is required this should
16、 be by agreement between manufacturer and user and should be identified as follows: 8G22G20 B, indicating a 6-32 UNC bolt of bearing length L 0.85 inches. M and E need to be adjusted accordingly. 6 Screw threadsThe bolts shall have unified screw threads, of the form and fit specified in the latest e
17、dition of BS A 100. 7 Anti-corrosion treatmentAll finished bolts shall be anodized and dyed green.NOTE Because of the use of the chromic acid process for anodizing, the bolts will not necessarily be uniformly coloured after staining. 8 Hardness valuesNOTE Hardness values are not currently applicable
18、, though they may become applicable in the near future. 9 Identification and markingThe bolts shall be marked in accordance with BS 3A 100:1991, clause 8.10 Quality assurance procedureThe bolts shall conform to the quality requirements specified in BS A 100, as appropriate to the method of manufactu
19、re.BS 4A 169:20022 BSI 2006a)b)Figure 1 Dimensionsofbolts(seeTable 1)BCDGL*(bearing length)M*(clamping length)E*(overall length)F(for ref.only)154530Rrad.Max. runout of thread = 2 x pitchAD30Rrad.0.015 inDia. of washer face = B min. - 0.01in0BS 4A 169:2002 BSI 20063Table 1 Dimensionsof bolts12345678
20、9101112131415NominalsizeDecimalequivalentofnominalsizeDiameterof plainportion ofshank2Gd7Gd7Gd7Gd7pitchG20G20G70G69G74G20G20G20G70G69G74G20G20G20G70G69G74G20G20G20G70G69G74G20Min.lengthofscrewedportionof shankWidth across flatsWidth acrosscornersThickness ofheadRadiusunderboltheatDepth ofchamferAFG3
21、eBCDRGmax.min.Ref. onlymax.min.max.max.min.max.min.max.min.inininininininininininininin0.112-40 UNC(4)0.11200.11150.10850.0500.3000.1880.1830.2170.0700.0600.0150.0050.0200.0150.138-32 UNC(6)0.13800.13750.13450.0630.2770.2500.2450.2890.0850.0750.0150.0050.0300.0200.164-32 UNC(8)0.16400.16350.16050.06
22、30.3270.3120.3070.3610.1000.0900.0200.0100.0300.0200.190-32 UNF(10)0.19000.18950.18650.0630.3770.3440.3390.3970.1150.1050.0200.0100.0300.0200.250-28 UNF(E)0.25000.24950.24650.0710.4590.4380.4310.5050.1500.1400.0300.0150.0400.0300.3125-24 UNF(G)0.31250.31200.30900.0830.4970.5000.4930.5770.1800.1700.0
23、300.0150.0400.0300.375-24 UNF(J)0.37500.37450.37150.0830.5970.5620.5540.6500.2200.2100.0300.0150.0400.0300.4375-20 UNF(L)0.43750.43700.43350.1000.6700.6880.6790.7940.2700.2600.0300.0150.0500.0400.500-20 UNF(N)0.50000.49950.49600.1000.7700.7500.7410.8660.3000.2900.0300.0150.0500.0400.5625-18 UNF(P)0.
24、56250.56200.55850.1110.8590.8750.8661.0100.3500.3400.0300.0150.0500.0400.625-18 UNF(Q)0.62500.62450.62050.1110.9490.9380.9291.0830.3900.3800.0300.0150.0600.050*Forbearing lengthL,clamplinglengthMand overall lengthEsee Table2.G3eG20G20This dimensionis anabsolute minimumassociated withmaximum lengthMa
25、ndminimum lengthE.It isnot intended foruse formanufacturingorinspectionpurposes.G20BS 4A 169:20024 BSI 2006a)b)Figure 2 Bearing length L, clamping length Mandoveralllength E(seeTable 2)LMMELEBS 4A 169:2002 BSI 20065Table 2 Bearing length L, clamping length Mand overalllength ENo.4-40 UNCNo.6-32 UNCN
26、o.8-32UNCNo.10-32 UNFPartNo.L*min.MEPartNo.L*min.MEPartNo.L*min.MEPartNo.L*min.MEininininininininininininG22A0.050.1300.45G22B0.050.1430.45G22C0.050.1430.50G22D0.050.1430.551A0.10.1800.501B0.10.1930.501C0.10.1930.551D0.10.1930.602A0.20.2800.602B0.20.2930.602C0.20.2930.652D0.20.2930.703A0.30.3800.703
27、B0.30.3930.703C0.30.3930.753D0.30.3930.804A0.40.4800.804B0.40.4930.804C0.40.4930.854D0.40.4930.905A0.50.5800.905B0.50.5930.905C0.50.5930.955D0.50.5931.006A0.60.6801.006B0.60.6931.006C0.60.6931.056D0.60.6931.107A0.70.7801.107B0.70.7931.107C0.70.7931.157D0.70.7931.208A0.80.8801.208B0.80.8931.208C0.80.
28、8931.258D0.80.8931.309A0.90.9801.309B0.90.9931.309C0.90.9931.359D0.90.9931.4010A1.01.0801.4010B1.01.0931.4010C1.01.0931.4510D1.01.0931.5011A1.11.1801.5011B1.11.1931.5011C1.11.1931.5511D1.11.1931.6012A1.21.2801.6012B1.21.2931.6012C1.21.2931.6512D1.21.2931.7013A1.31.3801.7013B1.31.3931.7013C1.31.3931.
29、7513D1.31.3931.8014A1.41.4801.8014B1.41.4931.8014C1.41.4931.8514D1.41.4931.9015A1.51.5801.9015B1.51.5931.9015C1.51.5931.9515D1.51.5932.0016A1.61.6802.0016B1.61.6932.0016C1.61.6932.0516D1.61.6932.1017A1.71.7802.1017B1.71.7932.1017C1.71.7932.1517D1.71.7932.2018A1.81.8802.2018B1.81.8932.2018C1.81.8932.
30、2518D1.81.8932.3019A1.91.9802.3019B1.91.9932.3019C1.91.9932.3519D1.91.9932.4020A2.02.0802.4020B2.02.0932.4020C2.02.0932.4520D2.02.0932.50*See5.3.+00.03+0.040+00.03+0.040+00.03+0.040+00.03+0.040BS 4A 169:20026 BSI 2006Table 2 Bearing length L, clamping length Mand overalllength (continued)No.4-40 UNC
31、No.6-32 UNCNo.8-32UNCNo.10-32 UNFPartNo.L*min.MEPartNo.L*min.MEPartNo.L*min.MEPartNo.L*min.MEinininininininininininin21A2.12.1802.5021B2.12.1932.5021C2.12.1932.5521D2.12.1932.6022A2.22.2802.6022B2.22.2932.6022C2.22.2932.6522D2.22.2932.7023A2.32.3802.7023B2.32.3932.7023C2.32.3932.7523D2.32.3932.8024A
32、2.42.4802.8024B2.42.4932.8024C2.42.4932.8524D2.42.4932.9025A2.52.5802.9025B2.52.5932.9025C2.52.5932.9525D2.52.5933.0026A2.62.6803.0026B2.62.6933.0026C2.62.6933.0526D2.62.6933.1027A2.72.7803.1027B2.72.7933.1027C2.72.7933.1527D2.72.7933.2028B2.82.8933.2028C2.82.8933.2528D2.82.8933.30*See5.3.+00.03+0.0
33、40+00.03+0.040+00.03+0.040+00.03+0.040BS 4A 169:2002 BSI 20067Table 2 Bearing length L, clamping length M and overall length E (continued)No. 6-32 UNC No. 8-32 UNC No. 10-32 UNCPart No. L*min.MEPart No. L*min.MEPart No. L*min.MEin in in in in in in in in29B 2.9 2.993 3.30 29C 2.9 2.993 3.35 29D 2.9
34、2.993 3.4030B 3.0 3.093 3.40 30C 3.0 3.093 3.45 30D 3.0 3.093 3.5031B 3.1 3.193 3.50 31C 3.1 3.193 3.55 31D 3.1 3.193 3.6032B 3.2 3.293 3.60 32C 3.2 3.293 3.65 32D 3.2 3.293 3.7033B 3.3 3.393 3.70 33C 3.3 3.393 3.75 33D 3.3 3.393 3.8034B 3.4 3.493 3.80 34C 3.4 3.493 3.85 34D 3.4 3.493 3.9035B 3.5 3.
35、593 3.90 35C 3.5 3.593 3.95 35D 3.5 3.593 4.0036B 3.6 3.693 4.00 36C 3.6 3.693 4.05 36D 3.6 3.693 4.1037B 3.7 3.793 4.10 37C 3.7 3.793 4.15 37D 3.7 3.793 4.2038B 3.8 3.893 4.20 38C 3.8 3.893 4.25 38D 3.8 3.893 4.3039B 3.9 3.993 4.30 39C 3.9 3.993 4.35 39D 3.9 3.993 4.4040B 4.0 4.093 4.40 40C 4.0 4.0
36、93 4.45 40D 4.0 4.093 4.5041B 4.1 4.193 4.50 41C 4.1 4.193 4.55 41D 4.1 4.193 4.6042B 4.2 4.293 4.60 42C 4.2 4.293 4.65 42D 4.2 4.293 4.7043B 4.3 4.393 4.70 43C 4.3 4.393 4.75 43D 4.3 4.393 4.8044B 4.4 4.493 4.80 44C 4.4 4.493 4.85 44D 4.4 4.493 4.9045B 4.5 4.593 4.90 45C 4.5 4.593 4.95 45D 4.5 4.59
37、3 5.0046B 4.6 4.693 5.00 46C 4.6 4.693 5.05 46D 4.6 4.693 5.1047B 4.7 4.793 5.10 47C 4.7 4.793 5.15 47D 4.7 4.793 5.2048B 4.8 4.893 5.20 48C 4.8 4.893 5.25 48D 4.8 4.893 5.3049B 4.9 4.993 5.30 49C 4.9 4.993 5.35 49D 4.9 4.993 5.4050B 5.0 5.093 5.40 50C 5.0 5.093 5.45 50D 5.0 5.093 5.5051B 5.1 5.193
38、5.50 51C 5.1 5.193 5.55 51D 5.1 5.193 5.6052B 5.2 5.293 5.60 52C 5.2 5.293 5.65 52D 5.2 5.293 5.7053B 5.3 5.393 5.70 53C 5.3 5.393 5.75 53D 5.3 5.393 5.8054D 5.4 5.493 5.9055D 5.5 5.593 6.0056D 5.6 5.693 6.1057D 5.7 5.793 6.2058D 5.8 5.893 6.3059D 5.9 5.993 6.4060D 6.0 6.093 6.50* See 5.3.+00.03+0.0
39、40+00.03+0.040+00.03+0.040BS 4A 169:20028 BSI 2006Table 2 Bearing length L, clamping length M and overall length E (continued)G21 in UNF G85 in UNF G29 in UNFPart No. L*min.MEPart No. L*min.MEPart No. L*min.MEin in in in in in in in inG22E 0.05 0.151 0.65 G 0.05 0.163 0.701E 0.1 0.201 0.70 1G 0.1 0.
40、213 0.75 1J 0.1 0.213 0.852E 0.2 0.301 0.80 2G 0.2 0.313 0.85 2J 0.2 0.313 0.953E 0.3 0.401 0.90 3G 0.3 0.413 0.95 3J 0.3 0.413 1.054E 0.4 0.501 1.00 4G 0.4 0.513 1.05 4J 0.4 0.513 1.155E 0.5 0.601 1.10 5G 0.5 0.613 1.15 5J 0.5 0.613 1.256E 0.6 0.701 1.20 6G 0.6 0.713 1.25 6J 0.6 0.713 1.357E 0.7 0.
41、801 1.30 7G 0.7 0.813 1.35 7J 0.7 0.813 1.458E 0.8 0.901 1.40 8G 0.8 0.913 1.45 8J 0.8 0.913 1.559E 0.9 1.001 1.50 9G 0.9 1.013 1.55 9J 0.9 1.013 1.6510E 1.0 1.101 1.60 10G 1.0 1.113 1.65 10J 1.0 1.113 1.7511E 1.1 1.201 1.70 11G 1.1 1.213 1.75 11J 1.1 1.213 1.8512E 1.2 1.301 1.80 12G 1.2 1.313 1.85
42、12J 1.2 1.313 1.9513E 1.3 1.401 1.90 13G 1.3 1.413 1.95 13J 1.3 1.413 2.0514E 1.4 1.501 2.00 14G 1.4 1.513 2.05 14J 1.4 1.513 2.1515E 1.5 1.601 2.10 15G 1.5 1.613 2.15 15J 1.5 1.613 2.2516E 1.6 1.701 2.20 16G 1.6 1.713 2.25 16J 1.6 1.713 2.3517E 1.7 1.801 2.30 17G 1.7 1.813 2.35 17J 1.7 1.813 2.4518
43、E 1.8 1.901 2.40 18G 1.8 1.913 2.45 18J 1.8 1.913 2.5519E 1.9 2.001 2.50 19G 1.9 2.013 2.55 19J 1.9 2.013 2.6520E 2.0 2.101 2.60 20G 2.0 2.113 2.65 20J 2.0 2.113 2.7521E 2.1 2.201 2.70 21G 2.1 2.213 2.75 21J 2.1 2.213 2.8522E 2.2 2.301 2.80 22G 2.2 2.313 2.85 22J 2.2 2.313 2.9523E 2.3 2.401 2.90 23G
44、 2.3 2.413 2.95 23J 2.3 2.413 3.0524E 2.4 2.501 3.00 24G 2.4 2.513 3.05 24J 2.4 2.513 3.1525E 2.5 2.601 3.10 25G 2.5 2.613 3.15 25J 2.5 2.613 3.2526E 2.6 2.701 3.20 26G 2.6 2.713 3.25 26J 2.6 2.713 3.3527E 2.7 2.801 3.30 27G 2.7 2.813 3.35 27J 2.7 2.813 3.4528E 2.8 2.901 3.40 28G 2.8 2.913 3.45 28J
45、2.8 2.913 3.5529E 2.9 3.001 3.50 29G 2.9 3.013 3.55 29J 2.9 3.013 3.6530E 3.0 3.101 3.60 30G 3.0 3.113 3.65 30J 3.0 3.113 3.7531E 3.1 3.201 3.70 31G 3.1 3.213 3.75 31J 3.1 3.213 3.8532E 3.2 3.301 3.80 32G 3.2 3.313 3.85 32J 3.2 3.313 3.9533E 3.3 3.401 3.90 33G 3.3 3.413 3.95 33J 3.3 3.413 4.0534E 3.
46、4 3.501 4.00 34G 3.4 3.513 4.05 34J 3.4 3.513 4.1535E 3.5 3.601 4.10 35G 3.5 3.613 4.15 35J 3.5 3.613 4.25* See 5.3.+00.03+0.040+00.03+0.040+00.03+0.040BS 4A 169:2002 BSI 20069Table 2 Bearing length L, clamping length M and overall length E(continued)G21 in UNF G85 in UNF G29 in UNFPart No. L*min.ME
47、Part No. L*min.MEPart No. L*min.MEin in in in in in in in in36E 3.6 3.701 4.20 36G 3.6 3.713 4.25 36J 3.6 3.713 4.3537E 3.7 3.801 4.30 37G 3.7 3.813 4.35 37J 3.7 3.813 4.4538E 3.8 3.901 4.40 38G 3.8 3.913 4.45 38J 3.8 3.913 4.5539E 3.9 4.001 4.50 39G 3.9 4.013 4.55 39J 3.9 4.013 4.6540E 4.0 4.101 4.
48、60 40G 4.0 4.113 4.65 40J 4.0 4.113 4.7541E 4.1 4.201 4.70 41G 4.1 4.213 4.75 41J 4.1 4.213 4.8542E 4.2 4.301 4.80 42G 4.2 4.313 4.85 42J 4.2 4.313 4.9543E 4.3 4.401 4.90 43G 4.3 4.413 4.95 43J 4.3 4.413 5.0544E 4.4 4.501 5.00 44G 4.4 4.513 5.00 44J 4.4 4.513 5.1545E 4.5 4.601 5.10 45G 4.5 4.613 5.15 45J 4.5 4.613 5.2
