1、MIL-A-23773A I3 7777906 0303758 I MIL-A-23773A (OS) 10 January i967 SUPERSEDING MIL-A-23773 (Wep) 25 June 1963 MILITARY SPECIFICATION ANCHOR, UNDERWATER MINE, MARK 56 MOD 4 AND MOD 5 This spec if ic,at ion has been approved by the Naval Ordnance Systems Commami, Department of the Navy 1. SCOPE 1.1 f
2、9r the procurement of the Anchor Mod 4 and Mod 5, 549694 and 549719. o3e class. This specification establishes the requirements Underwater Mine, Mark 56 They are of one type and 2. APPLICABLE DOCUMENTS 2.1 Tne following specifications, standards, draw- ings, and publications or such portions thereof
3、 as designated herein of the issue in effect on the date of invitation for bids form a part of this document. SPEC IF ICAT I ONS MILITARY MIL-C-21947 Conpound, Antifouling, For MIL-G- 771 1 Grease, Aircraft, General Purpose Underwater Cables, Navy Formula No, 184 STANDARDS MILITARY MIL-STD-105 Sampl
4、ing P.rocedures and Tables MIL-STD- 129 for Inspection by Attributes Marking for Shipment and Storage FSC 1350 / Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-23773A 13 7979706 0303757 3 M - MIL-A-23773A (OS) DRAWINGS BUREAU OF NAVAL WEAPONS
5、Shi pin Pallet for Mine LD 479467 Anc or ark 56 Type 1l) 549694 Anchor, Underwater Mine, Mark 56 Mod 4 U) 549718 Anchor, Underwater Mine Mark 56 Mod 5 Ri CLASSIFICATION OF DEFECTS CD 2421432 Anchor, Underwater Mine, CD 2421477 Axhor, Underwater Mine, Mark 56 Mod 4 Mark 56 Mod 5 And all specification
6、s, standards and drawings listed there on. (Copies of specifications, standards, drawings, and publica- tions required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 . - T
7、he Anchor, Underwater Mine!, Mark 56 Mod 4 owrein after referred to as the mine anchor is a weigit, including a cable pay out device disengageakle from a mine after launching and operable to anchor the mine at a predetermined depth below the surface of the water. 3.2 1 re-. 3.2.1 rowtion . - A prepr
8、oduction le of the mine anEr shall be =ctured using the met ods and procedures pro osed for the production lot. The preproduction sample s all be prepared for delivery in accordance with Section 5. This sample will be inspected as specified in Section 4 herein and is for the purpose of determining t
9、hat the production meets the requirements of this specification and the design. Provision of the sample shall be in accordance with 4.3,l. R “Y 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-23773A 13 W 7779706 0303760 T W 30202 Fabrication,
10、 - The mine anchor shall be manufactured in accordance with NOSC LD 549694 or 549718, all documents listed therein, and as specified herein, Inspection and acceptance shall be in accordance with Section 4, 3:2,3 Conflicting requirements o - Conflicting requirements arsing between this specification
11、and any other specification, publication, or drawing listed herein shall be referred to the procuring agency or appointed agent in writing for interpretation, clarification and resolut ion, 30204 - Data, - No data is required by applicable documents referenced in Section 2, unless specified in the c
12、ontract or order, 3e3 Performance requirements and product charac- teristics. - The mine anchor and its components and assemblies wet the following performance requirements and product char ac ter is t ics: 30301 Sib-assembly requirements o 3030101 Tube and flange assembly leakam - The tube shall ex
13、hibit no leakage and flange assembly (Dwg, 2428 when tested in accordance with,2,1, 3030102 Safety device assembly leakaE, - The safety device assembly (Dwg, -9) shm exhibit no leakage when tested in accordance with 4,5,2,2, Hold-off nut disen a ement - The hold-off nut shall be threaded on the drum
14、 s a t so that, when the drum shaft is positioned with its threaded end protruding the minimum amount through the anchor housing wg. 1362676), eight (8) to nine (9) turns o-f the drum will cause the hold-0f.f nut (Ihvg, 1388051) to disengage from the finger (Dwg, 1388040) o w 3,302 l a. . . .I t. .,
15、 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-23773A 13 99999Ub U303761 L MIL-A-2377A (OS) 3.3.3 r as movemenlt. - As the nut moves free of the =shaf*rotation of the cable drum, the finger assembly (Dwg. 1388038) shall move free of the pawl
16、weldment (Dwg. 2419554) . 3.3.4 . - The drum as wound with cable and assembleMhe anchor, sAall rotate upon its shaft so as to successfully complete the running-in test of paragraph 4.5.2.6. 3.3.5 euil Out Tm. - The force required to pull the cable out of the cowtail shall be no greater than 100 poun
17、ds to successfully complete the pull out test of paragraph 4 . 5 . 2 o 8 . - The entire length of cable shall be coated with antifouling compound in accordance with the provisions of 4.5.2.3. 3.306 . s- f.lxuhes; coatinns, construction, . - Materials; finishes, coatings construction, or the mine anc
18、hor shall meet the requirements Examination 3.3.7 of u) 549694 or U) 549718 and this specification. shall be in accordance with 4.5.1. 3.4 - rem . 3.4.1 P_ressure. - The container assembly (Dwg. 2428484) of the mine anchor shall be capable of withstanding the pressure test of 4.6.1. all parts, compo
19、nents and the assembly shall be thoroughly cleaned of metal chips and other foreign matter. sharp edges shall be removed. 3.6 W . - The equipment including all parts and accesiisall be constructed and finished in a manner to assure compliance with all requirements of this specification. Particular a
20、ttention shall be paid to neatness and thoroughness of plating, marking of parts and assemblies, and freedom of parts from burrs and sharp edges. 3.5 U-. - Prior to and after final assembly Burrs and I 4 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-
21、,-,- MIL-A-23773A 13 U 9999906 0303762 3 . MIL-A-23773A (OS) The standard of workmanship exhibited in any approved preproduction sample, subject to any qualification stated in the Governments notice of approval, shall determine the requirements of the contract relative to workmanship insofar as not
22、specifically covered by applicable specifications. 40 QUALITY ASSURANCE PROVIS IONS 4.1 for i ection. - Unless otherwise spec if iewh supplier is responsible for the performance of all inspection requirements as specified herein. specified, the su plier may utilize his own facilities or any commerci
23、al la oratory acceptable to the Government. The Government reserves 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 tion of Itions. - Inspection of the items
24、 covered by this specificaxshall be classified as follows: tract oryurchase order, the Except as otherwise a, b. Quality conformance inspection (See 4.5) c. Periodic production inspection (See 4.6) Preproduction inspection (See 4.5 and 4.6) 4.3 ec t ion. 4,3.1 roducti_on . . - A preproduction sample
25、 of ten (l)l%e anchors,%ac tured in accordance with 3.2.1, shall be subjected to the examinations and tests detailed in 4.5 and 4.6 at an activity designated by the procuring activity. Acceptance of the sample shall be based on no defects in this sample. Further production of the mine anchor by the
26、supplier, prior to approval of the sample, shall be at the suppliers risk. 4.3.2 tv conformance. 4.3.2.1 SmpUng. - Tests designated as sample tests in 4.5.2 shall be conducted on a random sample of 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI
27、L-A-23773A L3 m 7799706 03037b3 5 MIL-A-23773.AC OS) mine anchors selected from each production lot (see 6.2,l) in accordance .with the provisions of MIL-STD-105, Inspection Level II, AQL 0,65, Failure of a unit to pass any quality conformance samplin test shall result in rejection of that of defect
28、ives exceeds the acceptance number for the stated AQL, the lot have successfully passed the quality conformance sampling tests, unit and shall resu f t in rejection of the lot if the number No lot shall be shipped until the samples representing .* . 4,393 Periodic sampling tests, - After successful
29、completion of tTie quality conformance inspection of 4,5, the periodic sampling tests of 4,6 shall be conducted on a random sample of five (5) mine anchors selected by the Government from each lot of mine anchors offered for acceptance, When a unit fails to pass any periodic sampling test or specifi
30、ed subsequent quality conformance test, examination of the unit shall be made by the contractor to anal ze the cause of the failure and corrective action to be ta en, When cause of the failure is determined to be supplier non- c onf ormanc e t o the qual i t y c onf ormance te s t requirements of th
31、is specification and/or its associated drawings, the contractor may be required to screen the lot and repair or replace the discrepant part or material and resubmit the lot for complete retesting. 404 Special test equipment, - The following items of special test equipment are required to perform the
32、 quality conformance inspection specified in 4,5: a, Cable pay off test equipment, see Figure 1 (4,502 o 7) bo Decimal second timing device, (40502.7) eo Adapter for attaching of tube weldment to air line, (4050201) do Housing leakage test closure, (4,5,2,2,1) e, Piston leakage test closure, (4,5,2,
33、2,2) 405 iali ty conformance inspect ion, 40501 Examination, - Each mine anchor shall be visually and dimensionally examined in accordance with CD 2421432 or 2421477 to determine compliance with this 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
34、MIL-A-23773A 13 m 7777706 0303769 7 m MIL-A-23773A( OS) CABLE PAY OFF AND PAWLING TEST CABLE MINE MK ANCHOR E In o +I . 10“ DIA SHEAVE NOTES: 1. USE 1/4“ DIA STEEL WIRE ROPE FOR CABLES , II BI , “ Cl 2. CABLE “A“ TO BE A MIN OF 35 FT. LONG EYE TO EYE. 3. CABLE “Btl TO BE 17 f LONG, EYE TO EYE f LONG
35、, EYE TO EYE. 4. CABLE “C“ TO BE 25 E O fQ DRAW PIN - CABLE MAX. .FIGURE 1 7 c Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-23773A( OS) flange or stem, to which an air line can &e attached. Place a replaceable O“ ring (AN 6227-33) on the fla
36、nge of the testing closure, insert closure into housing, assemble specification and Us 549694 and 549718, accordance with the CD shall not relieve the contractor of his responsibility to meet all drawing requirements not listed on the CD. Examination in 4.5.2.1 fiaplin& - Close and seal the amph-s o
37、f the tube and fian e assembly (Dwg. 2428478) using plug (Dwg. 18275898 and a replaceable “O“ ring (hS 29513-212). With a replaceable O“ ring (MS 29513-220) in the groove of the flange (Dwg. 2428478), attach the flange to an adapter of an air line whereby a controlled internal pressurization of the
38、tube and flange assembly can be accomplished. tube and flange assembly shall be pressurized to 10 f 5 psig and submerged in water (including the adapter end) for 10 minutes. evidence of leakage shall be rejected. t& The Any tube and flange assembly showing any 8 f I Provided by IHSNot for ResaleNo r
39、eproduction or networking permitted without license from IHS-,-,- MIL-A-23773A 13 777770b 0303766 O MIL-A-23773A ( OS) internally pressurized to 15 I 5 psig for 10 minutes. piston showing evidence of leakage around or through the piston shall be rejected. 4.5.2.3 CO Apply compound at 1Om. ( a double
40、 boiler, with boiling water vented to the atmosphere in the bottom section, Do not use any type of oil or any water solution. Use only plain tap water, Do not remove the preservative compound from the cable before applying the antifouling compound. Move the cable slowly through the heated compound a
41、nd then through a tapered wiper die .171“ + .003“ - .OOO“ diameter. This should force the compound into the interstices of the cable and leave a . thin film remaining on the outside surfaces of the cable. The cable shall be examined to assure that the entire surface of the cable has been thoroughly
42、coated. Any section where the antifouling compound has not penetrated the interstices of the cable and a thin film does not remain on the surface of the cable shall be cause for rejecting the entire cable. WARNING: Any Overheating of the antifouling compound can have deleterious effects on it and ca
43、n also cause the release of toxic vapor. 4.5.2*4 nut d- test (Sampling). -With the hold-off nut free of the drum shaft, en age the nut and manually thread the nut on the shaft nine ( 6 ) full turns. In a reverse manner remove the nut. During this operation any mine anchor in which the nut binds or s
44、ticks upon the threaded portion of the drum shaft, shall be regarded as defective. 4.5.2.5 t test (SU. - With the hold-off nutashaft, rotate the drum. moves free of the pawl weldment. free of the pawl weldment shall be cause for regarding the anchor as defective. Determine that the finger of the -fi
45、nger assembly Any finger not moving 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-23773A 13 m 7779906 03037b7 2 m Runnin -in test (Sampling - With the _119 4,5,2,6 brake tooth engaging t e-ake end of the ru, secure the free end of the cable
46、 to the drum in any suitable manner in which the-drum may be rotated in either direction upon its shaft, With the cable so secured, rotate the drum a minimum of ten (10) complete revolutions in each direction, Any mine anchor in which any degree of binding or jamming of the drum occurs shall be rega
47、rded as defective, (See paragraph 4 . 5 2.9) Position the holdfoff nut so that two full turns of the- cable drum will disegage the nut from the finger assembly, Arrange and secure the test cables to the anchor cables by a method that will, upon testing, effect a smooth release, Criteria for cable le
48、ngths and other critical dimensions are shown in the schematic drawing of Figure 1, The release mechanism shall accept the load of the 80 pound weight until release is effected, Upon release, time the descent of the weight through its 30 foot drop. Should the weight drop in less than 4,O seconds or
49、more than 8,O seconds as slack develops in the cable, the mine anchor shall be regarded as defective and appropriate corrective measures shall be taken, (See paragraph 4,5,2,9) NOTE: Possible points of malfunction may be: (1) a jammed 405,207 Cable pay off and pawling test (Sampling), - or if the pawl fails to operate in locking the drum brake due
