1、 METRIC MIL-DTL-24705/4 23 August 2010 DETAIL SPECIFICATION SHEET PENETRATORS, MULTIPLE CABLE, COMPACT RECTANGULAR METAL FRAME AND BLOCKS, ELECTRICAL AND FIBER OPTIC CABLE This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquir
2、ing the products described herein shall consist of this specification sheet and MIL-DTL-24705. COMPACT RECTANGULAR CABLE PENETRATOR. Intended use. Compact rectangular metal frame, cable insert blocks, and filler insert blocks are intended for use with fiber optic cables as specified in MIL-PRF-85045
3、 and interconnection boxes as specified in MIL-DTL-24728/9, MIL-DTL-24728/10, electrical enclosures, and electronic equipment enclosures having cutouts of 215.9 mm 2.5 mm (8.5 inches .1 inch) by 110 mm 2.5 mm (4.33 inches .1 inch). The compact rectangular metal frame, cable insert blocks, and filler
4、 insert blocks specified by this specification sheet shall not be used to seal bulkheads or deck penetrations. Compact rectangular cable penetrator assembly (figure 1). Components required for each compact rectangular cable penetrator specified by this specification sheet shall be as follows: a. One
5、 compact rectangular metal frame assembly furnished with associated hardware (see figure 2). (1) Metal frame (2) Compression devices (quantity 2) (3) Counter frame (4) Hexagon nuts (quantity 10) (5) O-ring (6) Threaded inserts (quantity 10) b. Compact cable insert blocks (see figures 3, 4, and 5) an
6、d filler insert blocks (see figure 6) to fill the interior of the compact rectangular metal frame assembly. Blocks are furnished separately. AMSC N/A FSC 5975 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24705/4 NOTES: 1. Drawing is not to
7、 scale. 2. Unless otherwise specified herein, tolerances for molded rubber parts shall be in accordance with the Rubber Manufacturers Association (RMA) Drawing Designation A3 Commercial tolerance specified in MIL-HDBK-149, in the table entitled “Standard dimensional tolerances - molded solid rubber
8、products rubber manufacturers association (RMA) (69)”. FIGURE 1. Compact rectangular cable penetrator - assembled view typical. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24705/4 Compact rectangular frame and associated hardware. Compa
9、ct rectangular frame and hardware shall be in accordance with figure 2. Item type Item material Item designation e f g h2 t1 w1 W H F A 01 59.0 (2.32) 38.0 (1.50) 1/160.0 (6.30) 4.00 (.16) 40.0 (1.58) 130.0 (5.12) 230.0 (9.06) NOTES: 1. Dimensions are in millimeters. 2. Inch equivalents are shown in
10、 parentheses and are for information only. 3. Drawing is not to scale. 4. Single decimal place tolerances are 2.5 mm (.098 inch). 5. Two decimal place tolerances are 0.38 mm (.015 inch). FOOTNOTES: 1/Frame can be mounted in enclosures that have a panel thickness range of 3.0 7.0 mm (.12 - .28 inch).
11、 FIGURE 2. Compact rectangular metal frame and associated hardware. O -RINGHh2w1w1WHEXAGON NUTS10PLSCOMPRESSIONDEVICES2 PLSCOUNTER FRAMEMETALFRAMEt1gTHREADED INSERTS10 PLSfe3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24705/4 Compact two
12、-piece square-faced one cable insert block. Compact two-piece square-faced one cable insert blocks shall be in accordance with figure 3. Item type Item material Item designation A B C D B N 40 40.0 (1.57) 30.0 (1.18) 20.0 (.79) 10.0 (.39) NOTES: 1. Dimensions are in millimeters. 2. Inch equivalents
13、are shown in parentheses and are for information only. 3. Drawing is not to scale. 4. Item designation is an integer equal to two times the C dimension. FIGURE 3. Compact two-piece squared-faced one cable insert block. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without li
14、cense from IHS-,-,-MIL-DTL-24705/4 Compact two-piece rectangular-faced two cable insert block. Compact two-piece rectangular-faced two cable insert blocks shall be in accordance with figure 4. Item type Item material Item designation A B C D E B N 20 40.0 (1.57) 30.0 (1.18) 10.0 (.39) 20.0 (.79) 3.2
15、 (.13) NOTES: 1. Dimensions are in millimeters. 2. Inch equivalents are shown in parentheses and are for information only. 3. Drawing is not to scale. 4. Item designation is an integer equal to two times the C dimension FIGURE 4. Compact two-piece rectangular-faced two-cable insert block. 5 Provided
16、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24705/4 Compact two-piece rectangular-faced three cable insert block. Compact two-piece rectangular-faced three cable insert blocks shall be in accordance with figure 5. Item type Item material Item des
17、ignation A B C D E B N 15 40.0 (1.57) 30.0 (1.18) 7.5 (.30) 12.5 (.49) 4.0 (.16) NOTES: 1. Dimensions are in millimeters. 2. Inch equivalents are shown in parentheses and are for information only. 3. Drawing is not to scale. 4. Item designation is an integer equal to two times the C dimension. FIGUR
18、E 5. Compact two-piece rectangular-faced three cable insert block. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24705/4 Compact rectangular filler insert block. Compact rectangular filler insert blocks shall be in accordance with figure
19、6. Item type Item material Item designation A B C 05 40.0 (1.57) 30.0 (1.18) 5.0 (.20) 10 40.0 (1.57) 30.0 (1.18) 10.0(.39) 20 40.0 (1.57) 30.0 (1.18) 20.0 (.79) I N 40 40.0 (1.57) 30.0 (1.18) 40.0 (1.57) NOTES: 1. Dimensions are in millimeters. 2. Inch equivalents are shown in parentheses and are f
20、or information only. 3. Drawing is not to scale. 4. Item designation is an integer equal to two times the C dimension. FIGURE 6. Compact rectangular filler insert block. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24705/4 Part or identi
21、fying number (PIN) for compact rectangular cable penetrator assembly. Compact rectangular cable penetrator components are differentiated by an item designation in accordance with table I. An example of a PIN for a compact filler insert block 5 mm high of non-specified material is provided below (see
22、 MIL-DTL-24705 for complete details). M 24705 /4 - I N 05 Prefix for Military Specification Specification Number Spec Sheet No. Item Type (see table I) Item Material (see table I) Item Designation (see table I) TABLE I. PIN. Item type Item material Item designation Description Figure F A 01 Compact
23、rectangular metal frame 2 B N 40 Compact two-piece square-faced one cable insert block 3 B N 20 Compact two-piece rectangular-faced two cable insert block 4 B N 15 Compact two-piece rectangular-faced three cable insert block 5 I N 05 Compact filler insert block 6 I N 10 Compact filler insert block 6
24、 I N 20 Compact filler insert block 6 I N 40 Compact filler insert block 6 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24705/4 REQUIREMENTS. Requirements for compact rectangular cable penetrators are as described in table II. TABLE II.
25、Requirements. MIL-DTL-24705/4 requirement Material, alloys, aluminum Applicable, with the following modification: Aluminum alloy in accordance with ASTM B179 shall be used for the compact rectangular metal frame and counterframe. Material, corrosion-resisting steel (CRES) Applicable, with the follow
26、ing modification: CRES 303 shall be used for the hexagon nuts. CRES 304 in accordance with ASTM A276 shall be used for the threaded inserts. Construction, General The cable insert blocks shall have peelable layers to accommodate different size cables and shall be in accordance with figures 1 through
27、 6. Threads Applicable, with the following modification: Metric threads in accordance with FED-STD-H28/21and FED-STD-H28/22 shall be used. The nominal size and thread pitch shall be M6 x 1. Vibration Multiple cable penetrators shall show no evidence of broken, deformed, or displaced parts, chips, cr
28、acks, or physical damage when tested in accordance with 4.6.3 as modified herein. High Impact (HI) Shock Multiple cable penetrators shall show no evidence of broken, deformed, or displaced parts, chips, cracks, or physical damage when tested in accordance with 4.6.4 as modified herein. Watertight No
29、t applicable. Nonmagnetic Multiple cable penetrators shall be nonmagnetic. Electromagnetic compatibility (EMC) Not applicable. Salt spray The compact rectangular cable penetrator assembly shall show no sign of salt penetration or corrosive effects when tested as specified in 4.6.8 as modified herein
30、. Fire stop Not applicable. Durometer 65 to 87 durometer Compression 2 percent (maximum) percentage change when tested as specified in 4.6.11 as modified herein. Expansion 1.5 percent (maximum). Fluid immersion The change in durometer hardness shall be not greater than 5 percent when tested as speci
31、fied in 4.6.13 and modified herein. Infared (IR) signature Not applicable. Spraytight The compact rectangular cable penetrator assembly shall meet the spraytight requirement specified in MIL-STD-108 when tested as specified herein. Fungus Materials used in manufacturing subcomponents shall be listed
32、 as fungus inert in guideline 4 of MIL-HDBK-454, or shall be tested as specified herein. Following the test, the polymeric material shall show sparse or very restricted microbial growth and reproduction with minor or inhibited substrate utilization not exceeding MIL-STD-810 Rating I for fungus growt
33、h. There shall be little or no chemical, physical, or structural change detectable. 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24705/4 TABLE II. Requirements - Continued. MIL-DTL-24705/4 requirement Marking: frames and accessories The
34、identification marking shall be: a. Vendor Part Number. b. Manufacturers Name or Logo. c. Military Part or Identifying Number, in lieu of being included on item may be included on packaging. Marking: cable and filler insert blocks The identification marking shall be: a. Vendor Part Number. b. Manufa
35、cturers Name or Logo. c. Military Part or Identifying Number, in lieu of marking on item it may be included on packaging. VERIFICATION. Verification methods required for compact rectangular cable penetrators are as described in table III. TABLE III. Verification. MIL-DTL-24705/4 verification Vibrati
36、on Testing may be performed with the compact rectangular cable penetrator assembly installed in a qualified MIL-DTL-24728/9 or MIL-DTL-24728/10 fiber optic interconnection box. Following the test, the multiple cable penetrator test specimen shall pass the shock test specified in 4.6.4 as modified he
37、rein; shall pass the spraytight test specified herein; and shall show no evidence of broken, deformed, or displaced parts, chips, cracks, or physical damage; and in that order. Shock Testing may be performed with the compact rectangular cable penetrator assembly installed in a qualified MIL-DTL-2472
38、8/9 or MIL-DTL-24728/10 fiber optic interconnection box. Following the test, the multiple cable penetrator shall pass the spraytight test specified herein. Salt spray test The multiple cable penetrator test specimen shall be tested in accordance with MIL-STD-810, Method 509. The total time (exposure
39、 time and drying time) shall be 96 hours in accordance with MIL-STD-810, Method 509. Testing may be performed with the compact rectangular cable penetrator assembly installed in a qualified MIL-DTL-24728/9 or MIL-DTL-24728/10 fiber optic interconnection box. Compression Each sample of insert materia
40、l submitted for qualification shall be 29 mm in diameter x 10 mm. Samples shall be tested in accordance with ASTM D395, Method B, option 1. Expansion The sample size shall be one BN40 insert block. Fluid immersion Sample size shall be three BN40 blocks. After each fluid immersion test, the samples s
41、hall be removed from the test fluid and the insert material tested and shall pass test specified in 3.5.8. 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24705/4 TABLE III. Verification - Continued. MIL-DTL-24705/4 verification Spraytight
42、 The compact rectangular cable penetrator assembly shall be tested in accordance with MIL-STD-108 for spraytight. Testing may be performed with the compact rectangular cable penetrator assembly installed in a qualified MIL-DTL-24728/9 or MIL-DTL-24728/10 fiber optic interconnection box. Fungus Mater
43、ials not listed as fungus inert in guideline 4 of MIL-HDBK-454 shall be tested in accordance with TIA-455-56. 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24705/4 Qualification inspection. Qualification inspection shall consist of the e
44、xamination and tests specified herein on compact rectangular cable penetrator test specimens configured as shown on figure 7. The components for the test specimen shall be as specified on figure 7. Each component listed shall be required for each test specimen. FIGURE 7. Qualification test specimen
45、configurations 3/. 12 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24705/4 Item Quantity part/description Frame 2-FA01 1-BN40 with specified test cables Compact two-piece cable insert blocks 2-BN20 with specified test cables 13-BN40 2/Comp
46、act two-piece cable insert blocks 1/2-BN15 2/Filler insert blocks 1-IN10 1-M85045/25-01E 2-M85045/17-02P Test cables 1-M85045/17-01P Lubricant As required C-T-91 NOTES: 1/The compact two-piece insert blocks can also be used as blanking insert blocks. 2/Compact two-piece insert block with all layers
47、and core intact. 3/“(SOLID)” refers to the compact two-piece cable insert block with all layers and core intact. FIGURE 7. Qualification test specimen configurations 3/- Continued. Qualification by similarity. Qualified manufacturers who produce cable insert blocks and filler blocks for MIL-DTL-2470
48、5/1 are qualified under this specification sheet if their product passes the size inspection, vibration, shock, and spraytight requirements specified herein provided the only difference between the previously qualified blocks and the blocks under test is the depth of the block identified as dimension B in figures 3, 4, 5, and 6. Conformance inspection. Expansion shall be added to MIL-DTL-24705 Group B inspection. REFERENCE DOCUMENTS. General. The documents listed in this section are specified in this specification sheet. Govern
