1、I I I t ! I 1 i I I I I I I I i I I 1 I I I I I I 1 I I t I I I I 1 I I t 1 I I I I l I I a MILITARY STANDARD PROVISIONS FOR EVAGUATING QUALITY OF CLOTH COVERALLS MIGSTLb1668B SUPERSED ES MIkSTD-1668A 2 September 1981 9 February 1988 a IUISC N/A FSC 8415 DISTRIBUTION STATE13ENT A. Approved for publi
2、c release, distribution is unlimited. THIS DOCUMENT CONTAINS 20 PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-1668B DEPARTMEW OF DEFENSE WASHINGTON, DC 20301 Provisions for Evaluating Quality of Cloth Coveralls MIL-SID-1668B 1. This
3、military standard is approved for use by all Departments and Agencies of the Department of Defense. 2. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Officer in Charge, Navy Clothing and Textil
4、e Research B Facility, 21 Strathmore Road, Natick, MA 01760-2490 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. * ii Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
5、 IHS-,-,-I I I ! I I t I I ! I I I I I I l I I I I I I I I I I l l I ! I I i MIL-STD-1668B This standard provides a standardized procedure for evaluating quality of cloth coveralls procured for the Department of Defense. It is intended to list a single document, defects irrespective of fabrics, (i.e
6、., wool, cotton, polyester/cotton) or end use. The objectives of this standard are to: a. b. Standardize examination requirements. As of the date of approval of this document, the following specifications Provide standard descriptions for defects. will reference this standard: MI L-C-2 2 O 2 MIL-C-1
7、4610 MIL-C-21850 MIL-C-27845 MI L-C-2 91 11 MIL-C-41833 MIL-C-43339 MIL-C-43570 MIL-C-82297 MIL-C-83141 MIL-C-87000 MIL-C-87093 MIL-C-87230 - Coveralls, Mens, Cotton, Sateen - Coveralls, Explosive Handlers - Coveralls, Catapult, Crewmens - Coveralls, Mens, CM-3/P - Coveralls, Explosive Handlers, (Wo
8、mens) - Coveralls, Mechanics, Cold Weather - Coveralls, Industrial, Lint-Free - Coveralls, Safety, Industrial - Coveralls, Arc Preventive - Coveralls, Flyers Summer, Fire Resistant - Coveralls, Mens - Coveralls, (Flame Resistant) - Coveralls, Flyers, (,wu-64/P . iii Provided by IHSNot for ResaleNo r
9、eproduction or networking permitted without license from IHS-,-,-Paragraph 1. 1.1 1.2 2. 2.1 2.1.1 2.2 2.3 3. 3,1 3,2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4. 5. 5.1 5.2 5.3 6. 6.1 6.2 6.3 6.4 6.4.1 6.4.2 6.4.3 6.4.4 6.5 6.6 Number I II MIL-STD-1bb8B 8q = 7979733 0083102 T MIL-STD-1668B CONTENTS SCOPE Purpose
10、 Application REFERENCED DOCUMENTS Government documents Other publications Order of precedence Specifications, standards, and handbooks DEFINITIONS Fabric Defects Knots and Slubs Quality Assurance Terms Terms “outside“ and “inside“ Open Seam Raw Edge Defective Button Defective Metal Component Puckeri
11、ng GENERAL SAMPLE AND INSPECTION PROVISIONS End Item Examination Dimensional Examination Examination of Packaging Requirements INSPECTION inspection procedures initiation of Inspection Continuation of Inspection Switching Procedures Normal to Tightened Tightened to Normal Normal to Reduced Reduced t
12、o Normal Changes from previous issue Subject terms (key words) listing TABLES Sampling Provisions for Cloth Coveralls Classification of Defects Page 1 1 1 1 1 1 1 2 . 2 2 2 2 2 2 2 2 2 2 b 3 3. 3 3 4 6 6 Page 7 8 iV Provided by IHSNot for ResaleNo reproduction or networking permitted without license
13、 from IHS-,-,-1 MIL-STD-Lbb8B 89 I 9799933 0083103 1 MIL-STD-1668B 1. SCOPE 1.1 Pur se. The purpose of this standard is to provide standardized provisions -3- or evaluating the quality of cloth coveralls. lication. This standard will be made applicable to contracts by reference 1-2 - in e appropriat
14、e coverall specification. If there are any inconsistencies between the requirements of the applicable specification and this standard, the specification will govern. 2. REFERENCED EXUMEWTS * 2.1 Government documents. and Standards (DODISS) and s-s FEDERAL FED-STD-4 - MILITARY MIL-STD-105 - MIL-STD-1
15、09 - * 2.1.1 Specifications, standards, and handbooks. The following standards and handbook s form a part of this standard to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications
16、 supplement thereto, cited in the solicitation. Glossary of Fabric Imperfections Sampling Procedures and Tables for Inspection by Quality Assurance Terms and Definitions Attributes (Copies of specifications, standards, drawings and publications required by contractors in connection with specific pro
17、curement functions should be obtained from the procuring activity or as directed by the contracting officer . ) * 2.2 Other pub lications. The following document(s) form a part of this standard to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adop
18、ted shall be those listed in the issue of the DODISS specified in the solicitation. Unless otherwise specified, the issues of documents not listed in the WDISS shall be the issue of the nongovernment documents which is current on the date of the solicitation. The AATCC Photographic Comparative Ratin
19、g of Single and Double Needle Seams (Method 888, two photos) is available from: The American Association of Textile Chemists and Colorists P.O. Box 12215 Research Triangle Park, NC 27709 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_._. MIL-STD-
20、LbbB 4 97777LL 0083304 3 9 * 2.3 Order of precedence. In the event of a conflict between the text of this standard and the references cited herein, the text of this standard shall take precedence. laws and regulations unless a specific exemption has been obtained. Nothing in this standard however, s
21、hall. supersede applicable 3. DEFINITIONS 3.1 Fabric defects. The fabric defect definitions applicable to the standard are described in FED-STD-4. 3.2 Knots and slubs. Only knots and slubs that exceed the limits specified in the basic cloth specification shall be scored as defects. 3.3 Quality assur
22、ance terms. Definitions of quality assurance terms shall be in accordance with MIL-STD-105 and MIL-STD-109. 3.4 Term lloutsidell and “inside“, The terms “outside“ and “inside“ as used in this standard are defined as follows: Outside - Any part that is visible when coverall is completely fastened exc
23、ept under the collar, under sleeve tabs, under pocket flaps, and under protective flap. Inside - Any part that is not visible when coverall is completely fastened, including under the collar, under sleeve tabs, under pocket flaps, and under protective flap. The seam shall be classified open when one
24、 or more stitches joining a seam are broken or when two or more continuous skipped or runoff stitches occur. 3.5 Open seam. 3.6 Raw edge. 3.7 Defective button. Raw edge is defined as any edge not finished as specified, including any protruding edge on the outside of the coveralls. A button shall be
25、considered defective when it has a sharp, rough, cracked, or split edge that will affect the serviceability of the coveralls or cause injury to the wearer. 3.8 Defective metal component. A metal component shall be considered defective when it has a rough or sharp edge, burr, fracture, corrosion or m
26、alformation that will affect the serviceability of the coverall or cause injury to the wearer. 3.9 hickerin . in the course of the sampling examination, seams suspected the AATCC photographic comparative rating see 7-1) for seams, Puckering on a major portion of the suspected seam that equals or is
27、worse than rating 3 or single needle seams or doube needle seams shall be scored as a puckered seam. of being + puc ered shall be examined at a distance of 3 feet in comparison with 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIGS”D-1668B 4.G-
28、. 4.1 This stanard contains the provisions for end item examination, dimensional examination, and packaging examination requirements for coveralls. Ttie standard assigns to the listed defects, point values of 1, 2 or 3 depending on degree of severity. The higher point values are assigned to those de
29、fects having more detrimental affect on the appearance or serviceability of the item. 5, SAMLE AND INSPECTION PRoViSIONS 5.1 End item examination. The coveralls shall be examined and all defects shall be penalized as indicated in Table II of this standard. The sample size shall be as specified in Ta
30、ble I. The sample unit shall be one finished coverall. The lot shall be unacceptable if: a, The point value for 3 and The total number of points for 3 and 2 point defects in the samples from the preceding 10 lots is equal to or less than sixty percent of the total maximum acceptable point values for
31、 3 and 2 point defects from the preceding 10 lots; and a. b. c. The total number of points for 3, 2 and 1 point defects in the sample from the preceding 10 lots is equal to or less than seventy-five percent of the total maximum acceptable point values for 3, 2, and 1 point defects from the preceding
32、 10 lots; and d. e. Reduced inspection is considered desirable by the responsible Production is at a steady rate; and authority. 6.4.4 Reduced to normal. When reduced inspection is in effect, normal inspection shall be reinstituted if any of the following occur on original inspection: a. Alot is rej
33、ected; or b. A lot is considered acceptable but exceeds the applicable first value (see - i/ to Table I); or c. d. Production becomes irregular or delayed; or Other conditions warrant that normal inspection be instituted. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without
34、 license from IHS-,-,-_I_I_. - MIL-STD-3bb8B 84 W 777773L 0083308 O MIL-STD-1668B Table I - Sampling provisions for cloth coveralls Maximum Acceptable Sample 3 or not in accordance with specification requirements 3 SEAM(S) AND STITCHING(S) a. Accuracy of seaming: *1. 2. 3. 4. 5. 6. 7. 8. Any part of
35、 coverall caught in any unrelated stitching Seam noticeably puckered or irregular (unless End of stitching when not caught in other seams Thread break repaired by stitching back of the Ends of a continuous line of stitching overlapped Restricted seam not neatly accomplished, affecting Seams staggere
36、d 3/8 inch or more at junction when operation 2 otherwise specified herein) 1 or stitching not backstitched as specified break less than 1/2 inch less than 1/2 inch 1 appearance 1 1 1 Shade of thread used on outside not as specified 1 measured from center to center of seams 1 b. Gauge of stitching:
37、1. Edge or top stitching sewn too close to edge resulting in serious damage to cloth 2. Irregular, affecting appearance noticeably 3. Gauge not within range specified or varies more than 1/8 inch when no range is specified (score only when condition exists on more than 1/2 the length of seam) 3 1 1
38、8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-1668B 84 m 7777911 0083111 O m MIbSTD-1668B Table II - Classification of defects (Contd) Point Value VI. SERMs(S) AND STITCHING(S) (Contrd) c. Seam allowance: -Width of seam allowance not as s
39、pecified by 1/8 inch (score only when condition exists on more than 1/2 the length of seam) d. Open seam (see 3.4 and 3.5): 1. n outside, except hems: (a) Less than 3/4 inch (b) 3/4 inch or more 2. n inside and hems: - More than 3/8 inch e. Runoff, skipped or broken stitches: 1. 2. Joining sew, use
40、open seam classification Edge or top stitching, more than 1/4 inch (when not resulting in an open seam) f. Raw edges (see 3.6): 1. n outside: (a) Less than 3/4 inch (b) 3/4 inch or more 2. n inside and hems: (a) 1 to 2 inches (b) 2 inches or more g. Seam and stitch type: 1. Not specified seam or sti
41、tch type 2. Looper thread of 401 or 406 stitch type on outside 3. Any line of stitching omitted 4. Any line of stitching not beginning or ending where specified or insecure 5. Any seam or pleat not lapped or folded in direction specified , 1 1 2 1 1 1 2 1 2 2 3 3 1 2 9 Provided by IHSNot for ResaleN
42、o reproduction or networking permitted without license from IHS-,-,-O O B 3 L L 2 MIL-SJD-1668B a Table II - Classification of Defects (Contd) Point Value VI. SEAM(S) AND STITCHING(S) (Contd) h. Stitch tension: 1. Loose tension resulting in loosely exposed loops Tight tension (stitches break when no
43、rmal strain Loose tension resulting in a loose seam: of lower or top thread (score only when condition exists on more than 1/2 the length of seam) is applied in the direction of the seam or stitching) 2 3 2. 3. (a) Less than 3/4 inch (b) 3/4 inch or more i. Stitches per inch (score only when conditi
44、on exists on more than 1/2 the length of seam): 1. 2. One stitch less than the minimum or any number Two or more stitches less than the minimum specified in excess of the maximum specified j. Bartack, backtack, or tack: 1. Missing, insecure, misplaced, not serving intended purpose, or not specified
45、size or type: (a) For attachment (b) For reinforcement 2. Loose stitch tension 3. 4. 5. Length not as specified by + 1/16 inch or more Other than direction specifxed (vertical or horizontal) Number of stitches less than specified by three or more 1 2 1 2 VII. BU“HOLE(S) a. Omitted, added or not fini
46、shed as specified c. Finished length not as specified 3 3 2 * b. Not positioned as specified d. Not securely caught in fabric causing stitches to e. Not specified type, uncut buttonhole, incomplete stitching pull away from fabric 2 or gimp omitted 2 specified by 1/4 inch or more * f. Spacing between
47、 buttonholes not positioned as 2 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-LbbB 4 M 9997933 0083333 4 M Table II - Classification of Defects (Contd) Point Value VI. B“OLE(S) (Contd) g. Ragged edge, purling not finishing toward side h
48、, One or more broken stitches or two or more skipped i. Stitches per buttonhole less than the minimum specified specified or end not securely tacked stitches by three or more stitches VIII. BUTMN(S) (See 3.7) a. Omitted, broken or defective b. Misplaced or not positioned as specified c. Stitching no
49、t locked at end of cycle- (tug at loose end of the thread, when accessible, to determine whether it will ravel) d. Any part of coverall pleated or puckered by button attachment e. Not specified type, size or color f. Loose or insecurely sewn IX. SW FASTENER(S) AND GROMMEZ(S) (See 3.8) a. Omitted b. Broken or defective c. Misplaced of not positi
