1、 MIL-DTL-13220E 25 September 2008 SUPERSEDING MIL-DTL-13220D 25 January 2006 DETAIL SPECIFICATION HOOKS, SLIDING CHOKER (FOR USE WITH WIRE ROPE) This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers cast ste
2、el or drop forged sliding choker hooks for use with wire rope plain end loop and thimbled slings. 1.2 Classification and Part or Identifying Number (PIN). 1.2.1 PIN. The PIN consist of the letter “M“, the basic specification number, a dash, a letter for the hook size, a dash, and a letter for the fi
3、nish. M 13220 - A - S - F1.2.2 Metal and finish. PIN codes as follows: C - Cast or forged steel hooks with zinc finish (see 3.5.1 and 3.5.2). S - CRES steel hooks with passivation finish (see 3.5.3). 1.2.3 Hook size. PIN codes as follow, (see 3.5.1 and table I): Size Code1/2 A 5/8 B 3/4 D 7/8 1 E Co
4、mments, suggestions, or questions on this document should be addressed to (Defense Supply Center, Columbus, DSCC-VAI, 3990 East Broad Street, Columbus, OH 43218-5000), or emailed to, FluidFlowdscc.dla.mil. Since contact information can change, you may want to verify the currency of this address info
5、rmation using the ASSIST Online at http:/assist.daps.dla.mil. Hook style (see 1.2.4)Metal and finish (see 1.2.2)Basic specification numberM Prefix Hook size (see 1.2.3)Reactivated after 25 January 2006 and may be used for new and existing designs and acquisitions. INCH - POUNDAMSC N/A FSC 4030 Provi
6、ded by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-13220E 2 1.2.4 Hook style. Code as follow: (see 3.4.1) A - Grab Clevis B - Slip Clevis C - Grab Eye D - Swivel Eye E - Slip Eye 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this secti
7、on are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended of for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users a
8、re cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of
9、 this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATION MIL-C-24707 - Castings, Ferrous, General Specification For (See supplement 1 for list of specification sheets)
10、 (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of this document to the exte
11、nt specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN IRON AND STEEL INSTITIUTE (AISI) AISI 4130 - Steel Products Manual (Copies of these documents are available online at http:/www.steel.org or from AISI Connecticut
12、Ave., NW Suite 705 Washington, D.C. 20036 ASTM INTERNATIONAL ASTM A128/A128M - Austenitic Manganese-Steel Castings ASTM A693 - Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip ASTM B117 - Standard Practice for Operating Salt Spray (Fog) Apparatus ASTM B633 - Electro
13、deposited Coatings of Zinc on Iron and Steel (Copies of these documents are available online at http:/www.astm.org or from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA, 19428-2959.) Provided by IHSNot for ResaleNo reproduction or networking permitted without licens
14、e from IHS-,-,-MIL-DTL-13220E 3 SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) SAE-AMS2700 - Passivation of Corrosion Resistant Steels SAE-AMS5659 - Steel, Corrosion-Resistant, Bars, Wire, Forgings, Rings, and Extrusions 15Cr - 4.5Ni - 0.30CB (Nb) - 3.5Cu Consumable Electrode Melted Solution Heat Treated, Pr
15、ecipitation Hardenable SAE-AMS5826 - Steel, Corrosion and Heat Resistant, Welding Wire 15Cr - 5.1Ni - 0.30Cb - 3.2Cu (UNS S15500)-UNS S15500 SAE-AMS5862 - Steel, Corrosion-Resistant, Sheet, Strip, and Plate 15Cr - 4.5Ni - 0.30Cb (Nb) - 3.5Cu Consumable Electrode Remelted, Solution Heat Treated Preci
16、pitation-Hardenable-Composition similar to UNS S15500 (Copies of these documents are available from http:/www.sae.org or Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA, 15096-0001.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a
17、conflict between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtain. 3. REQUIREMENTS
18、 3.1 Specification sheets. The individual item requirements shall be as specified herein and also in accordance with the applicable specification sheet. In the event of a conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.2 First article.
19、When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.3. 3.3 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the mat
20、erial meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.4 General requirements. Sliding choker hooks shall conform to the dimensional limitations and general shape shown on figure 1 or 2. All surfaces over which the wire rope wi
21、ll pass shall be smooth, curved and rounded to prevent damage to the rope. The eye of the stock shall accommodate the size of wire rope specified (see 6.2). Table I or II shows principal limiting dimensions. 3.4.1 Various styles are shown on slash sheet, see MIL-DTL-13220/1 through MIL-DTL-13220/5.
22、3.5 Material. 3.5.1 Cast steel hooks. Material shall be cast steel, heat treated, clean and sound (see figure 1), and in accordance with MIL-C-24707 (except for low magnetic permeability requirements) or in accordance with ASTM A128/A128M. See table I for dimensions. 3.5.1.1 Classification. Choker h
23、ooks should be of the sizes and finishes, as specified in table l (see 6.2). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-13220E 4 TABLE I. Hook sliding choker sizes. FIGURE 1. Hook sliding choker. A B Hook size- (wire rope diameter) (metr
24、ic/decimal) Min. (metric /decimal) Max. (metric /decimal)Min. (metric /decimal) Max. (metric /decimal)C Max. (metric /decimal) D Min. (metric /decimal) E Min. (metric /decimal) 3/4 7/8 1-1/16 15/16 3-1/4 1 2-1/16 1/2 - (1.27cm/0.5 in) (1.91cm /.75in) (2.22cm /.875in) (2.69cm /1.06in) (2.38cm /.937in
25、) (8.25cm /3.25in) (2.54cm /1.0in) (5.23cm /2.06in) 15/16 1-1/8 3/4 1- 1/8 3-15/16 1-1/8 2-11/16 5/8 - (1.59cm/.625 in) (2.38cm /.937in) (2.84cm /1.12in) (1.91cm /.75in) (2.84cm /1.12in) (10cm /3.94in) (2.84cm /1.12in) (6.78cm /2.67in) 1- 1/16 1-3/8 1 1- 7/16 4-1/4 1-1/2 (3.81cm /1.5in) 3 3/4 - (1.9
26、1cm /.75in) (2.69cm /1.06in) (3.50cm /1.38in) (2.54cm /1.0in) (3.66cm /1.44in) (10.8cm (7.62cm /4.25in) /3.0in) 1-5/16 1-7/16 1-1/4 1- 7/8 5-1/2 1-7/8 4-1/8 7/8 - (2.22cm/.875in) (3.33cm /1.31in) (3.66cm /1.44in) (3.17cm /1.25in) (4.75cm /1.87in) (13.8cm /5.5in) (4.75cm /1.87in) (10.5cm and 1 - (2.5
27、4cm/1.0in) /4.13in) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-13220E 5 FIGURE 2. Hook sliding choker (drop forged). 3.5.2 Forged steel. Material shall be heat treated, forged alloy steel (see figure 2) in accordance with AISI 4130. See
28、table II for dimensions. TABLE II. Hook, (drop forged) sliding choker, sizes. 1/ Hook size- (wire rope diameter) (metric/decimal) Safe working load A B C D E F 1/2 (1.27cm/.5in) 3300 2-1/4 (5.72cm /2.25in) 1-1/16 (2.69cm/1.06in)3/4 (1.90cm/.75in) 2-61/64 (7.49cm /2.95in) 25/32 (1.98cm /.781in) 1/2 (
29、1.27cm/.5in) 5/8 (1.59cm/.625in) 5000 3-1/16 (7.77 cm /3.06in) 1-3/8 (3.48cm/1.37in)1 (2.54cm/1.0in) 3-9/16 (9.04cm /3.56in) 29/32 (2.30cm /.906in) 9/16 (1.43cm/.562in)3/4 (1.90cm/.75in) 8000 3-3/8 (8.53 cm /3.36in) 1-7/8 (4.75cm/1.87in)1-7/16 (3.66cm/1.44in)4-1/4 (10.79cm /4.25in) 1-5/32 (2.95cm /1
30、.16in) 5/8 (1.59cm/.625in)TABLE II. Hook, (drop forged) sliding choker, sizes Continued. 1/ Hook size- (wire rope diameter) (metric/decimal) Safe workingload G H K L P 31/32 1-1/16 11/16 4-5/8 2-15/16 1/2 (1.27cm/.5in) (2.46cm (2.69cm (1.74cm (11.75cm (7.47cm 3300 /.969in) /1.06in) /.687in) /4.625in
31、) /2.94in) 1-1/8 1-5/16 55/64 6-1/8 3-9/16 5/8 (1.59cm/.625in) (2.86cm (3.33cm (2.18cm (15.57cm (9.04cm 5000 /1.125in) /1.31in) /.859in) /6.13in) /3.56in) 1-7/16 1-5/8 1-1/16 7-1/4 4-9/32 3/4 (1.90cm/.75in) (3.66cm (4.13cm (2.69cm (18.41cm (10.87cm 8000 /1.44in) /1.63in) /1.06in) /7.25in) /4.28in) 1
32、/ Metric/decimal units. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-13220E 6 3.5.3 Corrosion resistant steel. Material shall be corrosion resistant steel SAE 15-5PH in accordance with SAE-AMS5659, or SAE-AMS5826, or SAE-AMS5862, or ASTM A
33、693. 3.6 Finish. 3.6.1 Steel finish. Steel finish shall be zinc coating in accordance with ASTM B633, type 6. 3.6.2 Corrosion resistant steel. Corrosion resistant steel shall be passivated in accordance with SAE-AMS2700, type 6 or 7. 3.7 Salt spray. When fittings are exposed to salt spray testing sp
34、ecified in 4.8, the plating shall show no corrosion products of zinc or basis metal corrosion products. The appearance of corrosion products visible to the unaided eye at normal reading distance shall be cause for rejection, except white corrosion products at the edges of the specimens shall not con
35、stitute a failure. 3.8 Strength. Strength requirements of the hooks shall be as shown in table Ill. TABLE Ill. Strength requirements. Safe working load Hook wire rope diameter Inches-(metric/decimal) Pounds (metric) 1/2-(1.27cm/.05in ) 3,300 (1497kg) 6/8-( 1.91cm/.75in) 5,000 (2268kg) 3/4-(1.91cm/.7
36、5in ) 8,000 (3629kg) 7/8- and 1-(2.22cm/.87in ) 15,000 (6804kg) 3.9 Identification. The choker hooks shall bear the manufacturers identification mark and hook size. The identification shall be stamped, or applied by any other method of permanent marking, on the hooks in a clearly visible location. 3
37、.10 Workmanship. Workmanship shall conform to accepted commercial standard practice for this type of equipment. Castings should be clean and high quality. There shall be no fins, spurs, scale, extraneous material, cracks, porosity, sand, inclusions, blowholes, rough edges, or rough surfaces. 3.11 Pr
38、oof test . Each sample hook selected shall be proof tested in accordance with 4.6 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.3). b. Conformance inspection (see 4.4). 4.2 Inspection cond
39、itions. Unless otherwise specified, all inspections shall be performed in accordance with the applicable test procedures. 4.3 First article inspection. First article inspection, if not done by the manufacturer, shall be performed at a laboratory acceptable to the procuring activity on sample units p
40、roduced with equipment and procedures used in production. 4.3.1 Samples for first article. Samples for first article shall be representative of the products proposed to be furnished to this specification. Sampling shall be in accordance with 4.5.1. Provided by IHSNot for ResaleNo reproduction or net
41、working permitted without license from IHS-,-,-MIL-DTL-13220E 7 4.3.2 First article inspection routine. All samples shall be subjected to first article testing in table lV. TABLE lV. First article inspection. Inspection Requirement Test method Visual and mechanical inspections 3.2 4.10Proof test 3.1
42、1 4.6 Strength test 3.8 4.7 Salt spray test 3.7 4.8 4.3.3 Sample failures. All samples must meet all of the contract requirements. Failure of a sample unit to pass any test shall be cause for rejection of the entire lot and to grant first article approval. 4.3.4 First article samples. Samples shall
43、be representative of the construction workmanship, components, and materials to be used during production. When a manufacturer is in continuous production of hooks from one contract to another, submission of additional first article samples for a new contract may be waived at the discretion of the a
44、cquiring activity (see 6.2). 4.3.4.1 Disposition of samples. First article samples shall be furnished to the Government as directed by the contracting officer (see 6.2). 4.3.4.2 First article information. Upon completion of first article inspection, the Government activity responsible for conducting
45、 the inspection program (see 6.2), shall report the results of the inspection, with appropriate recommendation, to the contracting officer. Approval of the first article samples or the waiving of first article inspection does not preclude the requirements for performing conformance inspection. 4.3.5
46、 First article inspection waiver. Required first article tests may be eliminated if documented approval has been obtained from the procuring activity. A first article test cannot be waived by DLA unless the contractor has delivered the same item within the last three years, has no unfavorable qualit
47、y history, and has not proposed changes to the processes or changed any subcontractors. DLA will not accept first article test results outside the stated requirements. All waivers or deviations shall be approved by the procuring activity. 4.4 Conformance inspection. 4.4.1 Group A inspection. For man
48、ufacturers that have successfully passed first article inspections and are continuously producing hooks to this specification, on going inspections shall consist of individual inspections (see table V) and sampling and periodic inspections (see table VIl). If first article is waived due to prior suc
49、cessful first article inspection the individual inspections and sampling and periodic inspections shall be the manufactures in house inspection procedures. TABLE V. Group A inspections. Inspections Requirement Inspection Number of samples Visual and mechanical 3.2 4.10 100% 4.4.2 Group B inspection. Sampling and periodic inspections shall consist of the
