1、MIL-T-5b77B 40 777Ob 007788Y 4 = ,- MIL-T- 56 7 7 R SUPERSEDING MIL-T-567 7A 12 April 1950 10 February-3982 -MIL I TARY S PE CI FI CAT I ON THIMBLES, WIRE - CABLE , AIRCRAFT This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This
2、specification establishes the requirements for aircraft wire-cable thimbles to be furnished in the following grades, as specified: Grade A - Carbon Steel Grade B - Corrosion-Resisting Steel Grade C - Phosphor Bronze 2. APPLICABLE DOCUMENTS 2.1 Government documents. * 2.1.1 Specifications and standar
3、ds. Unless otherwise specified (see 6.21, the following specifications and standards of the issue listed in that issue of t)e Department of Defense Index of Specifications and Standards (DoDISS) specified in the solicitation, form a part of this specification to the extent specif ied herein. SPECIFI
4、CATIONS - Federal QQ-B-7 50 Bronze, Phosphor, Bar, Plate, Rod, Sheet, Strip, Flat Wire, and Structural and Special Shaped Sections PPP-B- 566 Box, Folding, Paperboard PPP-B-636 Box , Sh ipp ing, Fiberboard QQ-2-325 .Zinc coat ing , . E lec trodepos ited, Requ iremen ts for Mi 1 it ary MIL-P- 11 6 Pr
5、eservat ion - Packaging, Methods of MIL - S - 50 5 9 Steel; Corrosion-Resisting (18 - 81, Plate, Sheet and Strip * MIL-C-87115 Coating, Immersion Zinc Flake/Chromate * D is p er s ion Beneficial comments (recomnendat ions, addit ions, delet ions) and any pertinent data which may be of use in improvi
6、ng this document should be addressed to: HQ AFLC CASO/LODS, Federal Center, Battle Creek, MI 49016 by using the self-addressed Standardization Document Proposal (DD Form 1426)appearing at the end of this document or by letter. FSC 4030 Provided by IHSNot for ResaleNo reproduction or networking permi
7、tted without license from IHS-,-,-MIL-T-Sb77B YO a 99949b 0097885 b 9 MI L-T-56 7 7 B STANDARDS Federal FED-STD-151 Metals, Test Methods Mil it ary M IL-STD- 12 9 Marking for Shipment and Storage DRAWINGS Air Force-Navy Aeronautical Standard AN1 O0 Thimble - Wire-Cable * (Copies of specifications an
8、d standards required by manuafacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer. * 2.1.2 Other Government documents, drawings, and publications, The following other Government documents form a part of
9、 this specification to the extent specified herein. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM A 380-78 Cleaning and Descaling Stainless Steel Parts, Equ ipmen t and Sy sterns (Application for copies of ASTM publications should be addressed to the American Society for Testing and Materia
10、ls, 1916 Race Street, Philadelphia, Pennsylvania 19103,) 21.3 Order of precedence, In the event of a conflict between the text of this specification and the references cited herein, the text of this specif icat ion shall take precedence. 3. REQUIREMENTS 3.1 Material. Shall conform to applicable spec
11、ifications and requirements as specified herein. 3.2 Composition. Thimbles shall be manufactured from the following materia 1 : 3.2.1 Grade A, Shall be cold-rolled and annealed steel of the composition as cpeciEied. in the following table: Composition Carbon Mangane se Ph os ph o rus Sulphur Percent
12、 Percent Percent (max ) Percent (max 1 0,05-0,15 0,30-0,60 0.045 0.050 , Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-5677B qC1 9999906 0097886 8 W MIL-T-5677B 3.2.2 Grade B. Shall be of corrosion-resisting sheet steel conforming to Specific
13、ation MIL-S-5059, composition G. * 3.2.3 Grade C. Shall be of medium temper sheet phosphor bronze conforming to Spec if icat ion QQ-B-750. * 3.2.4 Reclaimed materials. The use of reclaimed materials shall be encouinged to the maximum extent poss ible. 3.3 Shape, d hens ions and tolerances. Shall con
14、form to Drawing AN100. 3.4 Finish. * 3.4.1 Grade A. Shall be in accordance with Specification MIL-C-87115 or z inc plated in accordance with Spec if icat ion QQ-Z-325. 3.4.2 Grade B. Shall be passivated in accordance with ASTM A-380-78. 3.4.2.1 All grade B thimbles shall be washed in water and dried
15、 after passivat ion. 3.5 Corrosion resistance. Passivated thimbles (grade B thimbles) shall show no sign of corrosion, or tarnish and rust that cannot be removed with a damp cloth, after continuous exposure to salt spray for 24 hours. 3.6 Workmanship. Shall be in accordance with high-class aircraft
16、manufacturing practice. .Thimbles shall be free from seams, laminations, blis ters and other surface defects. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all insp
17、ection requirements as specif ied herein. Except as otherwise specified in the_contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserve
18、s the fight to perform any of the inspections set forth in the specif ication where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements 4.2 Methods of Examination and Tests. All the tests required for the testing of thimbles are classified as Insp
19、ection tests, for which necessary sampling techniques and methods of testing are specified in this section. The contractor shall furnish all samples and shall be responsible for accomplishing the required tests. When inspection is conducted at the contractors plant, all. inspection and testing shall
20、 be under the supervision of the Government Inspector. Contractors not having laboratory testing facilit ies satisfactory to the Government shall engage the services of a commercial testing laboratory acceptable to the inspector. The contractor shall furnish test reports, in duplicate, showing quant
21、itative results for all tests required by this specification, and signed by an authorized representative of the contractor or laboratory, as applicable. Acceptance or approval of material during course of manufacture shall in no case be construed as a guaranty of the acceptance of the finished produ
22、ct. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- _ MIL-T-5677B L(0 777930b 0077887 T MI L-i- 56 7 7 II 4.21 Examination of product. Representat ive thimbles shall he carefully examined to determine conformance with this specification with respect
23、 to workmanship, finish, dimensions and tolerances as shown on the drawing . 4.3 Sampling tests. 4.3.1 Selection of samples. Inspection samples shall consist of at least two thimbles from each lot. 4.3.1.1 Lot. A lot shall consist al1 thimbles of one grade and size - submitted for inspection at the
24、same time and place, * 4.3.1.2 Grade A. Samples for tests shall be selected in accordance with Specification MIL-C-87115. Samples for zinc plating tests shall be selected in accordance with Specification QQ-2-325. 4.3.1.3 Grade B. At least one thimbles from each lot of grade B samples shall be selec
25、ted for corrosion-resistance tests. . 4.3.2 Methods. 4.3.2.1 Gages. The manufacturer shall provide hardened steel pin gages - suitable for checking the internal dimensions of the thimbles. 4.3.2.2 Finish, * 4.3.2.2.1 Grade A thimbles. Grade A thimbles shall be tested in accordance with Specification
26、 MIL-C-87115 and the zinc plating shall be tested in accordance with Specif kat ion QQ-Z-325, 4.3.2.2.2 Grade B thimbles. Grade B thimbles shall be subjected, after passivation, to the salt-spray test for the specified time in ._._. accordance with Specification FED-STD-151. _ 4.4 Rejection and rete
27、sts. If any sample fails to meet the requirements of this specification, the Inspector shall select another sample-from the lot, If this sample fails to meet the requirements of this specification, the lot which it represents shall be rejected. Before resubmitting for acceptance, full particulars co
28、ncerning previous rejection and the action taken to correct the dafects found in the original shall be furnished to the Inspector. Thimbles rejected after retest shall not be again submitted without the specific approval of the Procuring Service. 4.5 Packaging inspection. Preservation, packing and m
29、arking shall be examined for conformance to Section 5, * 5, PACKAGING 5 .-l Preservation-Packaging. Preservation packaging shall be Level A or C as specified (see 6.2). 5.1.1 Level A, Unless otherwise specified, thimbles in unit quantities of 50 shall be packaged Method 1C of MIL-P-116 in a unit con
30、tainer conforming to PPP-B-566, Box closure shall be in accordance with the appendix to the box spec if icat ions. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-5637B 40 W 7799906 0097888 I MIL-T- 56 7 7 B - 5.1.2 Level C. Thimbles shall be c
31、lean and packaged in a manner that will afford adequate protection against corrosion deterioration and physical damage during shipment from su-pply sourc-e. to the first receiving activity. 5.2 Packing. Packing shall be level A, B or C as specified (see 6.2). 5,2.1 Level A. Unless otherwise stipulat
32、ed a quantity of thimbles - . packaged as specified in 5.1 shall be packed in a fiberboard container - cnforming to PPP-B-636, Class weather resistant, style optional. Insofar as :. practicable, containers shall contain identical quantities and be of minimum cube and tare consistent with the protect
33、ion required. Closure and strapping shall be in accordance with the appendix to PPP-B-636. 5.2.2 Level B. Level B shall be the same as Level A except the shipping container shall conform to class domestic. 5.2.3 Level C. The packagedthhbles shall be packed in shipping containers in a manner that wil
34、l afford adequate protection against damage during direct shipment from the supply source to the first receiving activity. These packs shall conform to applicable carrier rules and regulations. .5.3 Marking. In addition to any special marking required by the contract or order-.2), each unit package,
35、 intermediate and exterior. shipping , container shall be marked in accordance with MIL-STD-129. . 6. NOTES 6.1 Intended use. Thimbles are intended for use in making spliced and wrapped cable terminals for aircraft. 6.2 Ordering data. Requisitions, contracts,. and orders should state the AN part num
36、ber and quantity contained in each interior package. Jr 6.2.1 Level of packing. Applicable levels of packaging and packing required (see 5.1 and 5.2). . 6.2.2 Spec ia1 markings required (see 5.3). 6.3 Changes from previous issue. The margins of this specification are marked with an asterisk to iddic
37、ate where changes (additions; modifications, corrections, deletions) from the previous issue 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 o
38、f this document based on the entire content . irrespective of the marginal notations and. relationship to the last previous issue .- Custodians: Preparing activity: Navy - AS .Air Force - 99 Air Force - 99 .- . Review activities: DLA - IS Project No. 40 30-01 55 *U$. GOVERNMEhT PRINTING OFFICE: 1982-505-022/1264 Navy - SH, MC -. -. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
