DETAIL SPECIFICATION SHEET

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1 INCH-POUND MIL-DTL-553/3F w/amendment 8 July 7 SUPERSEDING MIL-DTL-553/3F May 6 DETAIL SPECIFICATION SHEET CONNECTORS, PRINTED CIRCUIT SUBASSEMBLY AND ACCESSORIES: PLUG, STRAIGHT-THRU, 3 thru CONTACT POSITIONS, CRIMP REMOVABLE CONTACTS (. SQ. GRID) This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-DTL-553. FIGURE. Connectors, housing, plug,. (.54 mm) square grid. AMSC FSC 5935

2 MIL-DTL-553/3F w/amendment FIGURE. Connectors, housing, plug,. (.54 mm) square grid - Continued.

3 MIL-DTL-553/3F w/amendment Inches mm NOTES:. Dimensions are in inches.. Metric equivalents are given for information only. 3. Unless otherwise specified, tolerances are ±.5 (.3 mm) on three place decimals. 4. These connectors mate with connectors specified in MIL-DTL-553/7. 5. Numbers indicating end cavities and lines indicating every fifth cavity are stamped on housing. FIGURE. Connectors, housing, plug,. (.54 mm) square grid - Continued. 3

4 MIL-DTL-553/3F w/amendment Inches mm NOTES:. Dimensions are in inches.. Metric equivalents are given for information only. 3. Unless otherwise specified, tolerances are ±.5 (.3 mm) on three place decimals. FIGURE. Turnable jackscrews. 4

5 MIL-DTL-553/3F w/amendment Inches mm Inches mm NOTES:. Dimensions are in inches.. Metric equivalents are given for information only. 3. Unless otherwise specified, tolerances are ±.5 (.3 mm) on decimals. 4. Contact crimp for use with (AWG) wire range no. to no. 6, insulation range.36 (.9 mm) to.54 (.37 mm). 5 Contact supplied loose piece, unless otherwise specified, PIN M553/3-5. Contacts may be supplied on reel for PIN M553/3-6. FIGURE 3. Pin, contact, crimp-snap. 5

6 MIL-DTL-553/3F w/amendment Inches mm Inches mm NOTES:. Dimensions are in inches.. Metric equivalents are given for information only. 3. Unless otherwise specified, tolerances are ±.5 (.3 mm) on decimals. 4. This connector mates with the external key type connectors specified in MIL-DTL-553/7 and is equipped with mounting hardware, male or female (see table III). FIGURE 4. Mounting hardware. 6

7 MIL-DTL-553/3F w/amendment REQUIREMENTS: Design and construction: Dimensions and configuration: See figures through 4 and tables I, II and III. Material: Insulator body: Insulator material shall be in accordance with MIL-DTL-553 or type GLCP-3F in accordance with ASTM D538 or MIL-M-459. Gasket: Silicon rubber. Jackscrews and mounting hardware: Stainless steel in accordance with MIL-DTL-553, passivated in accordance with SAE-AMS7. Contact material: Contact material shall be in accordance with MIL-DTL-553 or beryllium copper alloy C74 in accordance with ASTM B768. Plating: Contact and their terminations, shall be gold in accordance with MIL-DTL-553 over nickel in accordance with MIL-DTL-553 Keying: See table II. Crimp tool: Amp hand tool PIN 9346-, or approved equivalent. For use with M553/3-5 contacts. Amp hand tool PIN , or approved equivalent. For use with M553/3-6 contacts. Contact identification: See figure. Mating and unmating: The maximum mating force in pounds shall not exceed a value equal to.5 times the number of contacts, and the withdrawal force, in pounds, shall be a minimum of.5 times the number of contacts and shall not exceed the measured insertion force, when the housing is loaded with contacts and mate with connector specified in MIL-DTL-553/7. Current rating: 3. amperes maximum per contact..5 amperes continuous per contact at 75º F. Keying: See MIL-DTL-553/3. Contact resistance: No individual contact pair shall have a resistance exceeding. ohm. Contact retention: 3 pounds minimum. 7

8 MIL-DTL-553/3F w/amendment Dielectric withstanding voltage: Sea level: 9 volts rms. High altitude: volts rms. Part or Identifying Number (PIN): M553/3-(dash number from table I, II, and III). TABLE I. Housing dash numbers (without hardware), contact positions and dimensions. Dash numbers Number of contacts Contact identification numbers / Dimensions are inches. / Metric equivalents in parentheses are given for information only. Dimensions A B C D E.355 (59.8).855 (7.5) (85.) (97.9) (.6) (.6) (36.) (48.7) (6.4) (.6) (6.4).65 (5.45).565 (65.5) 3.65 (77.85) (9.55) 4.65 (3.5) (5.95) 5.65 (8.65) (4.35) 6.65 (54.5) 4.65 (3.5) 6.65 (54.5) (35.56).9 (48.6).4 (6.96).9 (73.66) 3.4 (86.36) 3.9 (99.6) 4.4 (.76) 4.9 (4.46) 5.4 (37.6) 3.4 (86.36) 5.4 (37.6) 3.6 REF (9.44) 5.6 REF (4.4) 8

9 MIL-DTL-553/3F w/amendment TABLE II. Dash numbers for pin header housing assembly. / Assembly dash number Housing PIN Keying jackscrews Groove end Torque end 89 / Pin header housing assembly consists of housing with jackscrews installed. 9

10 Kit dash number MIL-DTL-553/3F w/amendment TABLE III. Dash number for connector kits and component parts. / Assembly pin header housing (see table II) Hardware, receptacle mounting (see figure 4) / Component parts may be ordered separately. / 6 contacts are supplied in reel form. 3/ Contacts shopped loose in a plastic bag, unless otherwise specified. Contacts (loose piece) / -5 3/ nut

11 MIL-DTL-553/3F w/amendment Amendment notations. The margins of this specification are marked with vertical lines to indicate where modifications from this amendment were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations. Referenced documents. In addition to MIL-DTL-553, this document references the following: MIL-DTL-553/7 MIL-DTL-553/3 MIL-M-459 ASTM B768 ASTM D538 SAE-AMS7 CONCLUDING MATERIAL Custodians: Air Force - 85 DLA - CC Review activities: Air Force - 9, 99 Preparing activity: DLA - CC (Project ) NOTE: The activities listed above were interested 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

DETAIL SPECIFICATION SHEET

INCH-POUND MIL-DTL-55302/64H 21 June 2016 SUPERSEDING MIL-DTL-55302/64H w/amendment 1 31 March 2011 DETAIL SPECIFICATION SHEET CONNECTORS, PRINTED CIRCUIT SUBASSEMBLY AND ACCESSORIES: RECEPTACLE, SOCKET