1、 MIL-DTL-25427/1 08 December 2009 DETAIL SPECIFICATION SHEET COUPLING ASSEMBLY, AIRCRAFT HYDRAULIC, SELF-SEALING, QUICK DISCONNECT, GROUND SUPPORT This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the product described
2、 herein shall consist of this specification sheet and MIL-DTL-25427. (a) Indicates complete separation of coupling halves, allowing lateral displacement without interference between coupling halves. FIGURE 1. Coupling assembly dimensions and configuration. AMSC N/A FSC 4730 INCH-POUNDProvided by IHS
3、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-25427/1 2Type Q. SAE-AS85421/2 style 2 Type X. SAE-AS85421 style 1 Fitting end standard beam seal fitting end standard beam seal Type Y. SAE-AS4395 style E Type Z. SAE-AS4396 style E Fitting end standard flare
4、d fitting end standard bulkhead flared FIGURE 2. Types Q, X, Y, Z fitting end standards, coupling half, aircraft mounting. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-25427/1 3Type U. SAE-AS4395 style E Type V. SAE-AS4375 style E fitting
5、end standard flared Fitting end standard flareless Type W. SAE-AS85421/1 style 1 Fitting end standard beam seal FIGURE 3. Type U, V, W fitting end standards, coupling half, hose attachment. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-2542
6、7/1 4TABLE I. Coupling assembly dimensions with type U hose attachment half and type QXYZ aircraft mounting halves. A (max) Coupling halves aircraft mounting Dash No. Tube OD Type Q Type X Type Y Type Z -4 0.250 3.354 2.886 3.135 3.52 -6 0.375 3.457 2.970 3.505 3.91 -8 0.500 3.626 3.085 3.718 4.19 -
7、10 0.625 4.706 4.090 4.465 4.98 -12 0.750 4.738 4.066 4.505 5.10 -16 1.000 5.727 5.011 4.825 6.00 -20 1.250 5.158 4.445 4.685 5.49 -24 1.500 5.283 4.485 5.015 5.46 TABLE I. Coupling assembly dimensions with type U hose attachment half and type QXYZ aircraft mounting halves Continued. A1(approx) Coup
8、ling halves aircraft mounting Dash No. Type Q Type X Type Y Type Z -4 4.343 3.875 4.15 4.510 -6 4.578 4.091 4.352 4.786 -8 4.746 4.205 4.554 5.070 -10 5.716 5.100 5.486 5.991 -12 5.748 5.076 5.528 6.113 -16 6.337 5.661 6.112 6.650 -20 6.058 5.345 5.846 6.389 -24 6.463 5.665 6.206 6.640 Provided by I
9、HSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-25427/1 5TABLE II. Coupling assembly dimensions with type V hose attachment half and type QXYZ aircraft mounting halves. A (max) Coupling halves aircraft mounting Dash No. Tube OD Type Q Type X Type Y Type Z
10、 -4 0.250 3.252 2.784 3.059 3.46 -6 0.375 3.365 2.879 3.140 3.91 -8 0.500 3.526 2.985 3.334 4.19 -10 0.625 4.568 3.952 4.338 4.93 -12 0.750 4.557 3.885 4.338 5.06 -16 1.000 5.499 4.783 5.234 5.33 -20 1.250 4.883 4.170 4.671 5.20 -24 1.500 4.883 4.085 4.626 5.41 TABLE II. Coupling assembly dimensions
11、 with type V hose attachment half and type QXYZ aircraft mounting halves Continued. A1 (approx) Coupling halves aircraft mounting Dash No. Type Q Type X Type Y Type Z -4 4.226 2.648 3.48 3.84 -6 4.471 3.999 4.26 4.83 -8 4.471 3.169 4.18 4.68 -10 5.563 3.994 5.13 5.64 -12 5.552 3.872 5.18 5.76 -16 6.
12、134 4.232 5.62 6.15 -20 5.768 3.930 5.32 5.87 -24 6.048 4.380 5.770 6.20 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-25427/1 6TABLE III. Coupling assembly dimensions with type W hose attachment half and type QXYZ coupling halves aircraft
13、mounting. A (max) Coupling halves aircraft mounting Dash No. Tube OD Type Q Type X Type Y Type Z -4 0.250 3.063 2.330 3.100 3.46 -6 0.375 3.182 2.71 3.47 3.91 -8 0.500 3.262 2.739 3.685 4.19 -10 0.625 4.305 3.354 4.430 4.93 -12 0.750 4.272 3.232 4.481 5.06 -16 1.000 5.261 3.467 4.798 5.33 -20 1.250
14、4.645 3.370 4.665 5.20 -24 1.500 4.727 3.650 4.980 5.41 TABLE III. Coupling assembly dimensions with type W hose attachment half and type QXYZ coupling halves aircraft mounting - Continued A1 (approx) Coupling halves aircraft mounting Dash No. Type Q Type X Type Y Type Z -4 4.053 2.648 3.48 3.84 -6
15、4.302 3.83 4.091 4.661 -8 4.382 3.169 4.18 4.68 -10 5.315 3.994 5.13 5.64 -12 5.281 3.872 5.18 5.76 -16 5.911 4.232 5.62 6.15 -20 5.545 3.930 5.32 5.87 -24 5.907 4.380 5.770 6.20 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-25427/1 7FIGURE
16、 4. -16 coupling assembly, coupled with type U hose half and type X aircraft mounting half by coupling nut. NOTES: 1. Dimensions are in inches, unless otherwise specified, tolerances + 0.010. 2. Ratchet teeth of the MIL-DTL-25427/2 bulkhead half lock spring assembly must engage with the serrated tee
17、th on the inner sleeve of the MIL-DTL-25427/6 coupling nut ensuring positive locking. 3. For design feature purposes, this specification sheet takes precedence over the procurement document. 4. Referenced documents shall be of the issue in effect on date of contract award. REQUIREMENTS: 1. Material.
18、 For material requirements, see procurement specification MIL-DTL-25427. 2. Finish. For finish requirements, see procurement specification MIL-DTL-25427. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-25427/1 83. Pressure class. For pressure
19、 class requirements, see procurement specification MIL-DTL-25427. 4. Part or identification number (PIN). The PIN consists of the letter M, the specification sheet number, a dash number from table I, material code, fitting type aircraft end, fitting type hose end and pressure class. M 25427/1 -X X X
20、 X XXXX Example: M25427/1-8SZW5000 represents 0.5 inch hydraulic stainless steel coupling assembly with flared fitting on aircraft end, beam seal fitting on hose end operating at 5000 PSI. 5. Coupling assembly. Coupling assembly shall be assembled with internal components of same material except fla
21、nge. 6. Seal. If standard seals are unavailable, non-standard seals may be used with the approval of the qualifying activity. Prefix (M=military) Specification sheet number Dash number (see tables I, II, and III herein) Material code (see table I of MIL-DTL-25427) Pressure class 5000 = 5000 PSI (see
22、 1.2 of MIL-DTL-25427) Fitting type aircraft end (see figure 2) (Q = AS85421/2 style 2 beam seal) (X = AS85421/1 style 1 beam seal) (Y = AS4395 style E flared standard) (Z = AS4396 style H flared bulkhead) Fitting type hose end (see figure 3) (U = AS4395 style E flared) (V = AS4375 style E flareless
23、) (W = AS85421/1 style 1 beam seal) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-25427/1 97. Operation. Connection and disconnection of the coupling assembly shall be accomplished by using one hand with no tools required. The coupling asse
24、mbly shall function as required in MIL-DTL-25427 with quick connection and disconnection of coupling halves. When connected, the coupling half assembly may have a partially coupled and unlocked position that shall remain stable and permit fluid flow. 8. Test requirements. In accordance with the appl
25、icable test requirements of MIL-DTL-25427. Suppliers seeking qualification of new couplings are responsible for interchangeability of their couplings with the existing qualified couplings. The qualifying activity will perform the manual operation tests of the couplings provided by manufacturers when
26、ever necessary to ensure interchangeability and leakage within the allowable limit. 9. Interchangeability. Coupling assemblies, coupling halves or coupling parts shall be interchangeable having the same tube size and pressure class. These coupling assemblies configuration and dimensions are known to
27、 be similar to Parker coupling 44000, Eaton coupling 155/145, and Hydraulic International coupling CPB-L-A. Suppliers seeking to be on QPL-25427 are responsible for interchangeability and shall perform the manual operation test to ensure the manufactured coupling is interchangeable with other suppli
28、ers coupling and vice versa. 10. Marking. Marking shall consist of the part identification number, manufacturers name, trademark or CAGE code and shall be impression stamped or laser etched. The marking shall be protected from corrosion. 11. Intended use: These quick disconnect couplings are intende
29、d for delivering hydraulic fluid from ground cart to aircraft operating at 3000 and 5000 pound pressure with type II system fluid operating temperature range -65 F to +275 F. For larger sizes -20 and -24 are intended for return lines with operating pressure not more than 1000 PSI. These couplings ar
30、e intended for use in military aircraft and other hydraulic ground servicing equipment where the mounting bulkhead half and protective cap are mounted in aircraft and the other hose attaching half and protective plug are part of the ground support equipment. Provided by IHSNot for ResaleNo reproduct
31、ion or networking permitted without license from IHS-,-,-MIL-DTL-25427/1 10CONCLUDING MATERIAL Custodians: Preparing activity: Army-AV Navy-AS Navy-AS Air Force-99 (Project 4730-2008-124) Review activities: Army-AT, MI Navy-SA Air Force-11, 71 DLA-CC NOTE: The activities listed above were interested
32、 in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
