1、 DETAIL SPECIFICATION WRIST SEAL, FLYERS, ANTI-EXPOSURE, RUGGEDIZED This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers one type of flyers ruggedized anti-exposure wrist seal. The wrist seal is furnished i
2、n one size. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every e
3、ffort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications and standards. The fol
4、lowing specifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Ai
5、r Warfare Center Aircraft Division (Code 414100B120-3), Highway 547, Lakehurst, NJ 08733-5100 or emailed to Tom.Omaranavy.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at www.dodssp.daps.mil. AMSC N/A FSC 8
6、475MIL-DTL-32146 30 June 2004 NOT MEASUREMENT SENSITIVE Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32146 2 COMMERCIAL ITEM DESCRIPTION A-A-50195 - Thread, Aramid DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-32149 - Cloth, Waterproof, Fla
7、me Resistant, Moisture Vapor Permeable (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch or www.dodssp.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government drawings.
8、The following Government drawing forms a part of this document to the extent specified herein. Unless otherwise specified, the issue of this document is that cited in the solicitation or contract. NAVAL AIR SYSTEMS COMMAND (NAVAIR) 3769AS120 - Wrist Seal, Flyers Ruggedized Anti-Exposure (Copies of t
9、his drawing are available online at http:/ct.dscp.dla.mil/contracting/, or from Defense Supply Center Philadelphia, Code CBTC Bldg. 6, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of this document to the extent sp
10、ecified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN SOCIETY FOR QUALITY (ASQ) ASQ-Z1.4 - Procedures, Sampling, and Tables for Inspection by Attributes. (DoD adopted) (Copies of this document are available from www.asq.or
11、g or the American Society for Quality, 600 Plankinton Avenue, Milwaukee, WI 53203.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32146 3 AMERICAN SOCIETY FOR TESTING AND MATERIALS INTERNATIONAL (ASTM) ASTM-D412 - Rubber, Vulcanized and The
12、rmoplastic Elastomers - Tension, Standard Test Method for. (DoD adopted) ASTM-D573 - Rubber Deterioration in an Air Oven, Standard Test Method for. (DoD adopted) ASTM-D751 Coated Fabrics, Standard Test Method for. ASTM-D6193 - Stitches and Seams, Standard Practice for. (DoD adopted) (Copies of these
13、 documents are available from www.astm.org or ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in th
14、is document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2 (see 6.3). 3.2 Recycled, recovered, or environme
15、ntally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3 Materials and
16、 components. Unless otherwise specified in the contract or purchase order (see 6.2), the material and components specified in 3.3.1, 3.3.2, and 3.3.4 shall not have been manufactured more than 18 months prior to the date of delivery of the wrist seal(s). 3.3.1 Laminated cloth attachment panel. The b
17、ase cloth for the laminated cloth attachment panel shall be in accordance with MIL-DTL-32149. 3.3.2 Neoprene. The neoprene used in the wrist seal shall be a four-way hyperstretch black smooth-skin neoprene with a tricot backing. The neoprene shall conform to table I when tested as specified in 4.4.1
18、 (see 6.5) TABLE I. Neoprene characteristics CHARACTERISTIC REQUIREMENT Thickness, mm 3 Ultimate elongation, %, min 700 100% modulus, psi, min 40 300% modulus, psi, min 120 Ultimate tensile strength, psi, min 2300+ Heat elongation less than 1% change Provided by IHSNot for ResaleNo reproduction or n
19、etworking permitted without license from IHS-,-,-MIL-DTL-32146 4 3.3.3 Thread. The thread for stitching the laminated cloth attachment panel shall be aramid thread conforming to A-A-50195. The color shall match the material specified in 3.3.1 3.3.4 Adhesive. The adhesive for gluing the neoprene gask
20、et shall be a clear, high viscosity, concentrated, thermoset urethane rubber. When cured, the adhesive shall be elastic, stable over the range of -40 F to 400 F, insoluable in water, and insoluable in petroleums. The adhesive shall have a specific gravity of 1.0 and a flashpoint of not less than 68
21、F. The adhesive shall not have been manufactured more than 6 months prior to the date of delivery of the wrist seal (see 6.2 and 6.6). 3.4 Design. The wrist seal shall be a stretchable neoprene gasket with a tape sealed seamed laminated cloth attachment panel. 3.5 Patterns. The Government furnished
22、patterns (see 6.4) which show directional lines, and notches for assembly and seam allowances, shall not be altered in any way. The furnished Government patterns shall be used as a guide for cutting the working patterns. Minor modifications of the working patterns are permitted when using automated
23、equipment or to meet a manufacturers process, but the alterations shall not affect the serviceability, dimensions, or appearance of the wrist seal. 3.5.1 List of pattern parts. The pattern parts and cutting quantities for the seal shall be cut from the materials specified in table II. TABLE II. Patt
24、ern parts MATERIAL PATTERN NOMENCLATURE COMPUTER NOMENCLATURE CUT PARTS Laminated Cloth Wrist Attach Panel WRISTATHPNL 1 Neoprene Wrist Seal WRIST_SEAL 1 3.6 Construction. The wrist seal shall be constructed in accordance with drawing 3769AS120. 3.7 Marking. Cut parts shall be marked, ticketed, or b
25、undled to ensure a uniform size throughout the seal. Any method of marking shall be used except metal fastening devices, sewn on tickets, or adhesive type tickets that leave traces of adhesive on the material after removal of the ticket. 3.8 Stitches, seams, and stitching. ASTM-D6193, Stitch Type 30
26、1, with 6 to 8 stitches per inch shall be used in the construction of the laminated cloth attachment panel. Seams shall be as specified in construction drawings (see 3.6). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32146 5 3.9 Heat seali
27、ng. All sewn seams and stitching shall be covered on the inside of the wrist seal and sealed with the seam tape. The entire width of the seam tape shall be heat sealed over the seams and stitching. Crossover areas and ends left unsealed after heat sealing shall be taped. To maintain a tape overlap,
28、sealed sewn seams shall not contain more than two layers of seam tape per seam. The tape shall not lift from the seam at any point. End joints where the tape passes over taped seams on the wrist seal shall be avoided. The overlap of splicings and tape ends shall not be less than inch. 3.10 Finished
29、dimensions. The finished wrist seal dimensions shall be as specified in table III. A tolerance of 3/16 inch shall be used for all table III dimensions. The wrist seal shall be measured flat. Locations A, B, C, and D are shown on figure 1. TABLE III. Finished dimensions LOCATION LOCATION NAME DIMENSI
30、ONS (INCHES) A Width of attachment panel 8 1/8 B Length of attachment panel 3 1/4 C Length of neoprene 5 1/4 D Width of neoprene 2 1/2 3.11 Markings. 3.11.1 Identification. Each wrist seal shall contain identification markings conforming to drawing 3769AS120. 3.12 Workmanship. The finished wrist sea
31、l shall be uniform in quality and free from loose thread, foreign matter, and irregular defects that can adversely affect usage or durability. NOTE: 1. Depicts table III locations, and is for informational purposes only. 2. Not to scale. FIGURE 1. Wrist seal dimension Provided by IHSNot for ResaleNo
32、 reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32146 6 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2). b. Conformance inspection (see 4.3) 4.2 First article i
33、nspection. First article inspection shall consist of the examinations and tests specified in 4.4.1, 4.4.2, 4.4.3, and 4.4.4. 4.2.1 First article samples. Unless otherwise specified in the contract or purchase order (see 6.2), the number of samples for first article inspections shall be one wrist sea
34、l. The sample unit shall be one wrist seal and the lot size shall be expressed in units of wrist seals. 4.3 Conformance inspection. Conformance testing shall consist of the examinations specified in 4.4.1, 4.4.2, 4.4.3, and 4.4.4. 4.3.1 Conformance inspection samples. Sampling for inspection shall b
35、e performed in accordance with ASQ-Z1.4. The sample unit shall be one wrist seal and the lot size shall be expressed in units of wrist seals. 4.4 Examinations and tests. 4.4.1 Material and component examinations and tests. Materials and components shall be examined and tested in accordance with the
36、specified examinations and tests in table IV. TABLE IV. Materials and components examinations and tests MATERIALS CHARACTERISTICS REQUIREMENT PARAGRAPH EXAMINATIONS AND TESTS Laminated cloth Material identification 3.3.1 All examinations and tests specifed in MIL-DTL-32149 Neoprene Thickness 3.3.2 A
37、STM-D751, section 9 Ultimate elongation 3.3.2 ASTM-D412, Method A, Die D, 20 in/min 100% modulus 3.3.2 ASTM-D412, Method A, Die D, 20 in/min 300% modulus 3.3.2 ASTM-D412, Method A, Die D, 20 in/min Ultimate tensile strength 3.3.2 ASTM-D412, Method A, Die D, 20 in/min Heat elongation 3.3.2 ASTM-D573,
38、 70 hrs, 158 F Thread Material identification 3.3.3 All examinations and tests specified in A-A-50195 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32146 7 4.4.2 Classification of end item defects. The end items shall be visually examined a
39、nd measured for the defects specified in table V. TABLE V. Classification of end item defects CLASSIFICATION EXAMINE DEFECT CRITICAL MAJOR MINOR Any hole, scissor or knife cut, tear, mend, burn, or weakening defect such as multiple floats, slubs, skips, needle chew or abraded area. 101 Any evidence
40、of fabric delamination. 102 Any spot or stain (compound, oil, dirt, including marks) clearly visible. 201 Color of any component not as specified. 202 Any thread not trimmed to 1/16 inch and not covered by heat sealed seam tape. 103 Any thread not trimmed to 1/16 inch or thread scraps not removed. 2
41、03 Any damaged tape edges greater than 1/16 inch from outside edge. 204 General Material and components more than 18 months old. 1 Any defective component or defect that will affect the form, fit, and function of the assembly. 104 Any component part or operation omitted, not as specified, or require
42、d operation improperly performed. 105 Components and assembly Any component part not cut in accordance with the patterns. 106 Any seam tape not located as specified. 107 Any stitching not covered by seam tape. 108 Heat sealing Any spliced tape not overlapped 3/4 inch. 109 Provided by IHSNot for Resa
43、leNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32146 8 TABLE V. Classification of end item defects Continued. CLASSIFICATION EXAMINE DEFECT CRITICAL MAJOR MINOR Seams and stitching Any seam or attachment of any component twisted, puckered, pleated or caught in any unr
44、elated operation, or stitching that is not properly forced out or contained in a fold more than 1/8 inch. 110 End of stitching not securely backstitched for at least 1/2 inch when not caught in other seams or stitching. 111 Thread breaks, skips and run-offs not securely overstitched for at least 1/2
45、 inch. 112 Any stitching irregular or unevenly gauged (greater than 50% of the seam length or 4 inches, whichever is less). 113 Not specified seam or stitch type. 114 Loose tension resulting in a loose seam or tight tension resulting in breaking of stitches when normal pull is applied. 205 Stitches
46、per inch - one or two stitches more or less than specified (to be scored only when condition exists on 25% of the seam or more). 115 Stitches per inch more than two stitches more or less than specified (to be scored only when condition exists on 25% of the seam or more). 116 Any open seam. 117 Any i
47、nterruption of adhesive bead along butt seam. 118 Any gap greater than 1/32 inch along butt seam. 119 Adhesive missing. 120 Adhesive seam Any overlap along butt seam. 121 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32146 9 TABLE V. Classi
48、fication of end item defects Continued. CLASSIFICATION EXAMINE DEFECT CRITICAL MAJOR MINOR Identification missing, incorrect, or illegible. 122 Identification marking Misplaced by more than 1 inch. 206 End item measurements Any dimension not within the specified tolerance. 123 4.4.3 End item dimensi
49、onal examination. The end item shall be measured for conformance to the dimensions specified in 3.10 and table III as follows: Dimension A - Measure top edge of wrist seal attachment panel from folded edge to folded edge. Dimension B - Measure across wrist seal attachment panel from top edge to neoprene attachment seam. Dimension C - Measure length of neoprene from attachment panel seam to edge of n
