1、MIL-DTL-27893F 9999906 2033393 73T I INCH-POUND I MIL-DTL-27 893F (GL) 07 April 1997 SUPERSEDING 10 April 1989 MIL-H-27893E DETAIL SPECIFICATION “ESSES, PARACHUTISTS INDIVIDUAL EQUIPMENT PACK (IIH“- TYPE) This specification is approved for use by the Natick Research, Development, and Engineering Cen
2、ter, Department of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE i. 1 Scope. This specification covers one type of general purpose harness, having an “HI design and made of nylon webbing. The harness is equippd wih quick-fit adapters, buckl
3、es and snaps to secure it around the load and to a parachute harness worn by the parachutist. 1.2 Classification. The harness shall be of the following type: Type I - Deleted (see 6.3) Type II - Harness, Single Point Release 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section a
4、re 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 effort has Beneficial comments (recommendations, additions, deletions) and any pertinent
5、 data which may be of use in improving this document should be addressed to: U.S. Army Natick Research, Development, and Engineering Center, Attn: SSCNC-UTE Natick, MA O1 760- 50 17 by using the self-addressed Standardization Document Improvement Proposai D Form 1426) appearing at the end of this do
6、cument or by letter. AMSC N/A FSC 1670 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-27893F (GL) been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documents cited
7、in sections 3 and 4 of this specification, Whether or not they are listed. 2.2 Government documents. 2.2.1 Drawings. The following Government drawings forms a part of this document to the extent specified herein. Unless otherwise specified, the issue is that cited in the solicitation. DRAWINGS U.S.
8、ARMY NATICK RESEARCH, DEVELOPMENT AND ENGINEERTNG CENTER 11-1-3008 - 11-1-3009 - 11-1-3010 - 11-1-3011 - 11-1-3012 - Harness, Parachutists Individual Equipment Pack; Harness Strap, Leg, Release Assembly Handle Release Assembly Strap, Harness, Attaching Single Point Release, Type II, Assembly (Copies
9、 of drawings are available fiom the U.S. Army Natick Research, Development and Engineering Center, AT“: AMSSC-S-IMI, Natick, MA 01760-5017). 2.3 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 preceden
10、ce. Nothing in this 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. 3.2 Conformance inspection. Th
11、e end item, materials and components shall be subjected to conformance inspection in accordance with 4.3. 3.3 Materials and components. Materials and components shall conform to the requirements on the applicable drawings, to subsidiary specifications and standards applicable thereto, and as specifi
12、ed herein. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-DTL-27873F 9979906 2033173 502 MIL-DTL-27893 F (GL) 3.3.1 Recycled. recovered. or environmentally preferable materiais. Recycled, recovered, or environmentally preferable materials sho
13、uld be used to the maximum extent possible provided the material meets or exceeds the operational requirements, and promotes economically advantageous life cycle costs. 3.4 Construction. The construction shall conform in all respects to the drawings listed in section 2 and all subsidiary drawings pe
14、rtaining thereto, and as specified herein. 3.4.1 Stitchinp. machine. All machine stitching shall be as specified on the applicable drawings and as specified herein. 3.4.1.1 Tees 301 and 308 stitching. Ends of all type 301 stitching shall be backstitched or overstitched not less than 1/2 inch in acco
15、rdance with the required stitch pattern. Ends of type 308 stitching shall be secured by crowding a minimum of three stitches (accomplished by not allowing the materials to move) at the beginning and end of the stitching. Thread tension shall be maintained so that there will be no loose stitching res
16、ulting in the puckering of the material sewn. The lock shall be embedded in the materials sewn. 3.4.1.1.1 Repairs of type 301 stitching. Repairs of type 301 stitching shall be as follows: a. When thread breaks or bobbin run-outs occur during the stitching, the stitching shall be repaired by restarti
17、ng the stitching a minimm of 1 inch (1/2 inch for box-x and W-W stitching) from the end of the stitching. I/ b. Thread breaks or two or more consecutive skipped or run-off stitches noted during inspection of the item (in-process or end item) shall be repaired by overstitching. The stitching shall st
18、art a minimum of 1 inch from the defective area, (112 inch for box-x and W-W stitching), continue over the defective area, and continue a minimum of 1 inch (1 /2 inch for box-x and W- W stitching) beyond the defective area onto the existing stitching. Loose or excessively tight stitching shall be re
19、paired by removing the defective stitching, without damaging the materials, and restitching in the required manner. L/ - 1/ When making the above repairs, the ends of the stitching are not required to be backstitched. 3.4.1.1.2 Repairs of type 308 stitching. Repairs of type 308 stitching shall be in
20、 accordance with 3.4.1.1.1 a and 3.4.1.1.1 b, except that the stitching shall overstitch the defective area a minimum of three stitches onto the existing stitches. 3.4.1.2 Automatic stitching. Automatic stitching machines may be used to perform any of the required stitch patterns provided the requir
21、ements for the stitch pattern, stitches per inch, and size and type of thread are met, and at least three or more tying, overlapping, or back stitches are used to secure the ends of stitching. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL
22、-27893F = 9999706 2033394 449 = MIL-DTL-27893F (GL) 3.4.2 wends. All thread ends shall be trimmed to a maximum length of 1/4 inch. 3.4.3 Setting of mommets. Holes shall be prepunched to receive the grommets. Holes prepunched to receive the grommets shall be smaller than the outside diameter of the g
23、rommet barrel so that the barrel must be forced through the hole. The grommet shall be securely clinched without cutting the adjacent material. 3.4.4 Finishing of the jacketed wire rope ends. All wire rope ends shall be finished by either the melt method specified in 3.4.4.1 or by the dip method spe
24、cified in 3.4.4.2 such that the ends are completely enclosed with the melted coating flush with the melted nylon jacket. 3.4.4.1 Melt method. Heat the wire rope end nylon jacket with a suitable electrical heating element so as to melt the nylon over the end to form a smooth round surface. Remove any
25、 melted residue on the jacket surface with a fine abrasive material such that the surface is not damaged and is finished smooth. 3.4.4.2 Dip method. Coat the wire rope end with a nyln II or nylon 6/6 powder. Heat the coated end for 10 seconds at 405 burr, sharp edge or flash Color and finish not as
26、specified Not functioning properly, failing to effect a secure closure or open freely Not specified type or size Ends not nylon coated or wire material not completely enclosed Surface of nylon coated end not smooth or flush with melted jacketed surface Missing Not specified type or size Not swaged a
27、s specified One sleeve swage omitted Two sleeve swages omitted Swaged excessively tight, cutting wire rope material Swaged loosely, permitting sleeve to rotate freely Clinched excessively tight, cutting adjacent material Insecurely clinched to a degree that grommet may be detached from material side
28、 of material Washer installed on incorrect Barrel split 112 113 114 205 115 116 117 118 119 120 206 207 121 122 123 124 125 208 209 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-27893F m 999990b 2033397 358 m MIL-DTL-27893F (GL) TABLE I.
29、End item visual defects (contd) Classification Examine Defect Major Minor Loosely clinched, permitting grommet to rotate freely within the hole Washer omitted Thread Not specified type, class, or size Not specified color Open seams 1/2 inch or less More than 1/2 inch NOTE: A seam shall be classified
30、 as open when one or more stitches joining a seam are broken or when two or more consecutive skipped or run-off stitches occur. Seam and Wrong seam or stitch type stitch type 210 126 127 21 1 212 128 129 Stitches and stitching Stitching pattern not as specified Any row of stitching missing One stitc
31、h per inch under or over minimum and maximum specified Two or more stitches per inch under or over minimum and maximum specified Thread breaks, bobbin run-outs, or two or more consecutive skipped or run-off stitches not overstitched or restitched as specified Ends of stitching not backstitched or se
32、cured as specified Tension loose resulting in loose top or bottom thread, or tight tension causing puckering of material at stitch line 134 135 Needle chews or bunched stitching 130 131 213 132 133 214 7 ? Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-
33、,-,-MIL-DTL-27893 F (GL) TABLE I. End item visual defects (contd) Classification Examine Defect Maior Minor Components and or required operation omitted (unless otherwise classified herein) 136 Any component part omitted or not as specified assembly Any component misplaced or not assembled as Any da
34、rn, splice, or other unauthorized repair specified 137 215 Identification Omitted, illegible, incorrect, misplaced, or size Color not as specified 216 marking of characters not as specified 138 Cleanness Dirt, grease, oil or foreign matter clearly Thread ends not trimmed to 1/4 inch or less noticeab
35、le 217 218 Construction Any component missing, or not assembled or and assembly joined as specified 139 4.3.4 s. The end items shall be examined for conformance to the dimensions specified on the drawings. Only those dimensions that can be evaluated without damaging or disassembling the end items sh
36、all be examined. Any dimension not within the specified tolerance shall be classified as a defect. 5. PACKAGING 5.1 Packaginq. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When actual packaging of materiel is to be performed by DoD pe
37、rsonnel, these personnel need to contact the responsible packaging activity to ascertain requisite packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activity within the Military Department or Defense Agency, or within the Military Departments Sys
38、tem Command. Packaging data retrieval is available fiom the managing Military Departments or Defense Agencys automated packaging files, CD-ROM products, or by contacting the responsible packaging activity. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH
39、S-,-,-MIL-DTL-27893F m 999990b 2033199 T20 MIL-DTL-27893F (GL) 6. NOTES (This section contains information of a general or explanatory nature which may be helpful, but is not mandatory). 6.1 Intended use. The harness is intended for use by individual parachutists for securing individual combat equip
40、ment during airborne jump operations. The harness with the secured load is attached to the parachutists harness D-rings with the attaching strap snaps. 6.2 Acquisition reauirements. Acquisition documents must specify the following: a. Title, number and date of this specification b. When first articl
41、e is required (see 3.1) c. Sampling plan, lot size, sample size (see 4.3) d. Packaging requirements (see 5.1) this document because the item is no longer procured. 6.3 Classification deletion. The requirements for type I, “Hl Harness have been deleted in 6.4 Source for heat sealinp equipment. A sour
42、ce for the heat sealing equipment for forming the ends of the nylon jacketed wire rope (see 3.4.4.2 - induction coil dip method) is Boyd Coatings Research Co., Inc., 51 Parmenter Road, Hudson, MA 01749. 6.5 Subject term (key word) listing. Airborne jump operations Combat equipment carrier Quick rele
43、ase T-10 parachute harness 6.6 Changes fi-om previous issue. Marginal notations are not used in this revision to identifi I changes with respect to the previous issue due to the extent of the changes. Custodian: Preparing activity: Review activity: (Project 1670-A886) 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
