1、 Beneficial comments (recommendations , additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: 93) , Naval Air Engineering Center , Lakehurst, NJ self-addressed Standardization Document Improvement Proposal (DD Form 1426 appearing at the e
2、nd of this document or by letter. Engineering Specifications and Standards Department (Code 08733, by using the i .I r MILITARY SPECIFICATION ANCHORS, SEA, LIFE RAFT This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE MIL-A-3339B 15 March i96
3、8 1.1 Scope. This specification covers the requirements for two types and three sizes of life raft sea anchors. 1.2 Classification. The sea anchors shall be furnished in the following types and sizes, as specified (see 6.2): 2. 2.1 effect - 1/ Diameter in inches PPLICABLE DOCUMENTS Issues of documen
4、ts. on date of invitation for bids or request for proposal, form a The following documents of the issue in part of this specification to the extent specified herein: SPECIFICATIONS FEDERAL V-T-295 - Thread, Nylon. PPP-B- 636 PPP-T-42 PPP-T-4 5 - Boxes, Shipping, Fiberboard. - Tape , Packaging/Maskin
5、g , Paper. - Tape, Gummed, Paper, Reinforced and Plain, for Sealing and Securing. , Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-3339C 20 799970b 0183347 3 MIL-A-3339C 3*2,2,2 Bridle, The bridle for the type I and II sea anchors shall be fab
6、ricated I from nylon cord conforming to MIL-C-5040, type III. MILITARY , I 3.2.3 Thread. All the sewing operations shall be performed with the nylon thread conforming to V-T-295, type I or II, class 1 or 2, size E. MIL-T-5 038 MIL-C-5 04 O MIL-1-6903 - Ink, Marking (for Parachutes and Other Textile
7、Items). MIL-G- 1649 1 BfIL-c-21108 - Cloth, Nylon, Raft Bottom. MIL-C-43307 - Cord, Nylon, Solid Braid, General Purpose. MIL-W-83420 - Wixe Rope, Flexible, for Aircraft Control. - Tape, Textile and Webbing, Textile, Reinforcing, Nylon. - Cord, Nylon. - Grommet, Metallic. STANDARDS FEDERAL FED-STD-19
8、1 - Textile Test Methods. FED-STD-595 - Colors. PED-STD-751 - Stitches, Seams, and Stitching, MILITARY MIL-STD- 105 MIL-STD- 12 9 - Sampling Procedures and Tables for Inspection by - Marking for Shipment and Storage. Attributes, (Copies of specifications, standards, drawings and publications require
9、d by con- tractors in connection with specific acquisition functions should be obtained from the acquiring activity, or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 First article, When specified (see 6.2), the contractor shall furnish sample unit(s) for first article inspection and a
10、pproval (see 4.3.1 and 6.2). 3.2 Materials. The materials shall conform to the applicable specifications as listed or required herein. 3.2*1 body. The body of the type I and II sea anchors shall be fabricated from nylon cloth conforming to MIL-C-21108, type I, 3.2.2 Lines. 3.2.2.1 Mooring. 3.2,2,1.1
11、 Type I sea anchor. The mooring line for the type 1 sea anchor shall be nylon cord conforming to MIL-C-5040, type III. 3.2.2.1.2 Type II sea anchor, The mooring line for the type II sea anchor shall be nylon cord conforming to MIL-C-43307, 1/4 inch diameter. - . I. I. f Provided by IHSNot for Resale
12、No reproduction or networking permitted without license from IHS-,-,-MIL-A-3339C 3.2.4 Ring. The ring for the type f sea anchor shall be fabricated from flexible corrosion-resistant steel cable conforming to MIL-TJ-83420, 3/32 inch diameter. 3.2.5 Sleeve. The sleeve for securing the ends of the meta
13、l ring for the type I sea anchor shall be fabricated from corrosion-resistant steel and shall conform to figure 3. 3.2.6 Grommets. The grommets for the type I sea anchor shall be brass with a black chemical finish conforming to MIL-G-16491, type I, class 3, size number O. 3.2.7 Reinforcing tape. The
14、 reinforcing tape for the type II sea anchor shall be nylon conforming to MIL-T-5038, type III, 314 inch wide. 3.2.8 Throat facing. The throat facing for the type II sea anchor shall be fabricated from the body cloth 3.2.1. 3.3 Design. 3.3.1 Type I sea anchor. The type I sea anchor shall be a trunca
15、ted cone with an enclosed flexible steel cable at the top, a bridle and a mooring line. sea anchor shall conform in appearance to figure 1. The type I 3.3.2 Type II sea anchor. The type II sea anchor shall be semi-hemispherical in shape with a bridle and a mooring line. appearance to figure 4. The t
16、ype II sea anchor shall conform in 3.4 Construction. The details of the construction for the type 1 and II sea anchors shall conform to figures 1 through 7, as applicable. All the knots shall be tightly drawn. prevent fraying. no cut edges shall be visible. The cut edges of the lines and reinforcing
17、 tape shall be seared to No sharp edges shall be formed and except for the lines and bridle, 3.4.1 Seams and stitching. All the seams used in the fabrication of the sea anchor shall conform to figures 1 through 6, as applicable. All the regular sewing shall be accomplished with stitch type 301 and t
18、he zigzag stitching, for attaching the end of the mooring line to itself and the ends of the bridle to the body of the type II sea anchor, shall be accomplished with stitch type 304. All the stitch types shall conform to FED-STD-751 and shall contain 8 to 10 stitches per inch. the seam edges shall b
19、e properly forced out and shall not contain any folds. seam shall be twisted, puckered or pleated and no part of the sea anchor shall be caught in an unrelated operation or seam. All the thread ends shall be trimmed to a length of 114 to 31% inch. All No 3.4.1.1 Sewing. Each row of stitching shall b
20、e straight and parallel to the seam edge. tolerance of plus or minus 1/32 inch. ing that are not caught in other seams or stitching, shall be securely backstitched, by overlapping on itself, for at least 112 inch. Thread breaks, skips and run-offs shall be overstitched not less than one inch. The th
21、read tension shall be main- tained so that there shall not be any loose or tight stitching and the lock shall be embedded in the materials sewn together, The straightness of the stitching in any row shall be maintained within a The ends of all the stitch type 301 stitch- 3 Provided by IHSNot for Res
22、aleNo reproduction or networking permitted without license from IHS-,-,-illL-A-3339C 20 9979906 OL33Li9 7 H MIL-A-3339C 3.4.1,2 Bartacking. The size and location of the bartacks, on the type II sea anchor, shall be as specified in figures 4 and 6. Each bartack shall contain a minimum of 21 stitches,
23、 3.5 Color, Unless otherwise specified (see 6.2), the color of the cloth, lines, sewing; thread, reinforcing tape and throat facing shall be natural (white) color. Taen blue color is specified, the color of the body cloth, lines, bridle, sewing thread, reinforcing tape, and throat facing shall appro
24、ximately match FED-STD-595 blue lusterless color number 35042, when inspected as specified in 4.3.1. components shall have at least “good“ colorfastness to light and laundering, when inspected as specified in 4.5.2. The dyed 3,6 Performance characteristics. 3.6.1 Strength of the ring attachment. Whe
25、n inspected as specified in 4,5.31 the strength of the ring attachment shall be not less than 100 pounds. 3.7 Dimensions. The dimensions of the assembled sea anchors, width of the seams and hems, and the dimensions and location of the components shall conform to figures 1 through 6, as applicable, w
26、hen determined as specified in 4.5.5, 3.8 Marking, Unless otherwise specified, the natural color sea anchor shall be marked with blue ink conforming.to MIL-1-6903, blue, the color of the markings shall be white or yellow, accomplished with ink conforming to MIL-1-6903. I, size 1, sea anchor and one
27、inch for the type I, sizes 2 and 3, and the type II, size 1, sea anchors. The markings shall be legible and durable letters and numer- als, which shall be thoroughly dry prior to packaging. located on the innerside of the sea anchor and shall be as follows: When the color of the sea anchor is The he
28、ight of the markings shall be 1/4 inch for the type The markings shall be SEA ANCHOR MIL-A-333% Type I or II, as applicable Size-1, 2 or 3, as applicable Name of manufacture Contract no. Date of manufacture (month and year) 3,s Wsrkmanship. The sea anchors shall not contain any non-specified hole, t
29、ear, cut, mend, burn, needle chew, spot, or stain. The grommets shall be securely clinched without distortion, damage, splitting or cutting of the cloth. The sleeve shall be securely crimped without distortion, splitting, or damage to the steel cable, The metal components shall not contain any sharp
30、 edge, sliver, nick, crack, or burr. All loose thread, lint, and foreign matter shall be removed. The as- sembled sea anchors shall conform to the quality and grade of product established by this specification. criteria established herein. The occurrence of defects shall not exceed the acceptance 4,
31、 QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract, the contractor may use his own or any othe
32、r facilities suitable for the performance of the inspection 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- I MIL-A-3337C 20 9997706 0183350 3 MIL-A-3339C requirements specified herein, unless disapproved by the Government. The Government reserves
33、 the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Classification of inspection. The inspection requirements specified herein are classified as follows: a. Fir
34、st article inspection. First article inspection consists of ex- aminations and tests performed on samples which are representative of the production item after the award of a contract to determine that the production item meets the requirements of this specification (see 4.3). b. Quality conformance
35、 inspection, Quality conformance inspection consists of examinations and tests performed on individual products or lots to determine conformance of the products or lots with the requirements set forth in this specifi- cation (see 4.4). 4.3 First article inspection. 4.3.1 First article samples. Unles
36、s otherwise specified, as soon as practicable after award of the contract or order, the manufacturer shall submit three sea anchors of the type specified in the contract or order. The samples shall be repre- sentative of the workmanship, construction, components and materials to be used during produ
37、ction. anchors from contract to contract, submission of further first article inspection samples on the new contract, may be waived at the discretion of the acquiring activity (see 6.2e). Approval of the first article inspection samples or the waiving of the first article inspection does not exclude
38、.the requirements or per- forming the quality conformance inspection. The first article inspection samples shall be furnished to the Government as directed by the contracting officer (see 6.2f) The samples shall be plainly identified by securely attached durable tags marked with the following inform
39、ation: When a manufacturer is in continuous production of these sea Samples submitted by (name) (date) for first article inspection in accordance with the requirements of MIL-A-333% under Contract No. 4.3.2 First article examinations and tests. The first article inspection of the sea anchors shall c
40、onsist of all the tests and examinations of this specifi- cat ion. 4.3.3 First article approval. Upon completion of the first article inspection program, recommendations and comments pertinent for use in monitoring production will be forwarded by the Government activity responsible for the inspectio
41、n program (see 6.2f). One approved sea anchor will be returned to the manufacturer for use in monitoring production. The other sea anchors will be consumed or destroyed in the first article inspection and shall not be considered as part of the quantity to be delivered under contract. 4.4 Quality con
42、formance inspection. The sampling and Pnspection levels shall conform to MIL-STD-105. following: The quality conformance inspection shall consist of the 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-3339C 20 W 999990b 0183351 5 W MIL-A-3339
43、C Color matching of the cloth, lines, sewing thread and reinforcing Colorfastness of the cloth, lines, sewing thread, and reinforcing Strength of the ring attachment Visual examination of the sea anchors Dimensional check of the sea anchors Packaging tape, as applicable tape, as applicable, to light
44、 and laundering 4.4.1 Sampling. 4.4.1.1 Inspection lor. 4.4.1.1.1 Components (cloth, lines, sewing thread and reinforcing tape). An inspection lot size shall be expressed in units of one for the individual components (cloth, lines, sewing thread and reinforcing tape) designated in the terms used com
45、mercially and shall consist of all of an individual item received by the life raft see anchor manufacturer at one time. The sample unit shall be one unit of each of the individual components (cloth, lines, sewing thread and reinforcing tape) designated in the terms used commercially. 4.4.1.1.2 Rings
46、. An inspection lot size shall be expressed in units of one assembled ring for one size sea anchor made essentially under the same conditions and from the same components and shall consist of all the rings received by the sea anchor manufacturer at one time. anchor. The sample unit shall be one ring
47、 for one size sea 4.4.1.1.3 Sea anchors-. An inspection lot size shall be expressed in units of one sa anchor of one type and size made essentially under the same conditions and from the came materials and components. The sample unit shall be one sea anchor of one type and size. 4.4,l.l.i Packaging.
48、 An inspection lot size shall be expressed in units of one fully prepared shipping container, containing sea anchors of one type and size, fully prepared for delivery from essentially the same materials and components. The sample unit shall be one shipping container, containing sea anchors of one ty
49、pe and size, fully prepared for delivery with the exception that it need not be sealed. 4.4.1.2 Sampling for tests and examinations of the components and sea anchors. The sample size, acceptance criteria, tests and examinations required for the components and sea anchors shall be as specified in table I. 4.5 Inspection methods. 4.5.1 Color matching, The color of the cloth, lines, sewing thread and rein- forcing tape, as applicable, shall approximately match the approved shade un
