1、SPECIFICATIONS MILITARY MIL-F-3192 MIL-C-15159 Compound, Preservative; Fire-Water-Mildew, - and Weather- MIL-P-16594 Projectiles, Bombs, Rockets and Guided Missile Warheads, MIL-C-17516 Copper-Silicon Alloy Bars, Plates, Rods, Sheets, Strips, Fiberboard, Flame-Resistant (For Projectile Grommets) Res
2、istant (For Canvas) Inert Parts, Manufacture of Flat Wire, Wire, Forgings, and Structurai and Special Shaped Sections. NAVY DEPARTMENT General Specifications for Inspection of Material,. Appendix II (Metals) STANDARDS MIL-STD-105 Sampling Procedures and Tables for Inspection by Attributes MIL-STD-12
3、9 Marking of Shipments DRAWINGS BUREAU OF ORDNANCE 330051 Fiber Grommets (For Projectile Rotating Bands) PUBLICATIONS NAVY ORDNANCE PAMPHLETS Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-OB400 General Instructions for the Design, M,mufacture, and
4、nspection of Naval Ordmnnce Materiai (Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity, or as directed by the contracting officer,) 31 General, - XIi addition to th
5、e requirements specified herein the requirements of Bpecification MIL-P-16594 shaii apply, 3,1,1 Pre-production lot, - Unless atherwise specified the submission of a pre- production lot and the satisfactory compliance of this lot with the requirements of this specification shall be required before g
6、eneral production on the contract is approved, These grommets shall be made by the same processes the contractorntends to we in the fuifiilment of the contract, 3,2 _Materiai,- !Che body and swells of the grommets shall be made of fiberboard in accordance with Specification MIL-F-3192 and when speci
7、fied on the applicable drawing shall be Fehforced on the outside with metal bands, The grain of the fiber, if any, shall be in the longest direction of the piece, 3,2,1 Metal parts, - All metal parts shall be of steel, made corrosion resistant by zinc plating or by a suitahie coating, or shall be of
8、 copper-alloy baccordance with Specification MIL-C-27616. ln either case the metal parts shall be regiired to pass the saIt spray tests of 4,3,1, The metal parts shall not crack, break, or show other .ndicaions of weakness when subjected to the conditions of use, 3,2,1,3 Eyelet8 shail be of adequate
9、 size to permit quick assembly of the laces axid shall be properly assembled to the body of the grommet such that each assembled eyelet shall withstand a minimum puil of 70 pounds for 5 and 6 inch and 120 pounds for 8 inch and larger grommets without indication of weakness in the eyelet or surround-
10、 ing fiber, 3,2,1,2 Fasteners for securing the swells to the body may be either rivets or staplea, The fasteners shall pass through all the pieces to be fastened arid sha11 be adequately backed and clinched on both sides to prevent pulling out, Fasteners shall not protrude more than O! O20 beyond th
11、e inner surface of the swells, Fasteners shall be placed to each side o the centerline of the rear swell as shown on the applicable drawing. 3,2,2 COS. - The material of the laces shall be mildew proof or properly treated to conform to the mildew resistance requirements of Specification MtL-C-15169.
12、 The ends of the laces shall be tipped to facilitate aesembly with the grommets. The bre,c;iag strength of the laces shall not be less than 70 pounds for 5 axid 6 inch grommets nor less than 12 pounds for 8 inch and larger grommets. ness otherwise specified laces shali not be nrssembled with the gro
13、mmets but shall accompany each package of grommets and the number fumfshed shall be 110 percent of the number of grommets, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without li
14、cense from IHS-,-,-4,3,1 Salt spray jest, Representative specimens of the metal parts shall be subJected to the twenty-percent salt spray (fog) test in accordance with General Speci- fications for Xtispxtion of Material, Appendix II, Metals, Part A, No ruBt spots shall be formed, except at emda if n
15、ot coated, after twensr-four hourcr exposure. loading applied on a loop of wire or cable passing through th0 eyelet, 4.3.2 Eyelet pull test, - Assembled eyelets shall be subjected to the specified 4,3,3, Itrace breaking atrength, - Laces shall be subjected to the speoified loading. 4.4 Fra-productio
16、n. lot test, - Grommets in the pre-production lot will be sub- ject& to complete iticJpection and to all tests considered necessary by the Inspector tu amwe complimce with the requirements of the drawing and this specification, She resulta of this examination will determine whether the contractor sh
17、all proceed under the contract, Unieas otherwise specified a miiiimurn of fifty grommets shall comprise a preproduction lot, 5, PREPARATION FOR DELIVERY 6.1 pactkagng 8 - Uiueea otherwiae Eipecified commercial packages meeting re- quiremenu of common carriers are acceptable, No more than one size of
18、 grommet sfitill be packed In a single coiltairier, 6.2 Markin 3 Each package shall be marked with the following: Grommeta, caliber, + awing and assembly number, the quantity contained therein, and the number of the oontract or order, Standard MIL-STD-129 applies to general marking require- ment8 a
19、6, NOTES 6,1 Orderhg data, - Procurement documents should specify the following: a) Title, number, and date of this specification, b) Drawing number and date of applicable drawing, 6,2 _Use, - Grommets covered by this specification are assembled over the ro- tating bands of projectiles to protect th
20、em from damage duririg handling,. shipment, and StOWw6, 8, S Precedence,- Ail correspondence, Instructions, or practices that are ia coaflict: with and are dated or in UBB prior to the latest revision of this speoification are hereby cancelled, c 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
