1、AMSC N/A FSC 3940 A-A-59809 18 NOVEMBER 2008 COMMERCIAL ITEM DESCRIPTION BLOCKS, TACKLE, SNATCH The general Services Administration has authorized the use of this commercial item description by all federal agencies. 1. SCOPE. This commercial item description (CID) covers snatch blocks for use with m
2、anila and nylon ropes. 2. SALIENT CHARACTERISTICS. 2.1 General requirements. The blocks shall be as shown in figure 1 and as specified herein. A locking lug on one end of the crosshead shall serve to lock the shackle link in position. The opposite end of the crosshead shall be permanently attached t
3、o the swivel link in a manner requiring that the crosshead be rotated 90 degrees from the locked position before releasing the shackle link and opening the block. The connections and fittings shall swing out of position to allow quick entry of rope into the sheave groove without reeving. The crosshe
4、ad and links shall be forged steel. The blocks shall conform to Table 1. 2.1.1 Shell. Shell shall be formed from steel or malleable iron and shall be flanged to provide additional stiffness and reduce wear and chafing of the rope. Shell pieces shall be securely held in position and shall be designed
5、 to prevent distortion or spreading under extreme lateral rope pulls. 2.1.2 Straps. Straps shall be made of steel. Each strap shall be of rugged one-piece construction and shall extend the full length of the shell pieces. Straps shall be securely welded, riveted, or bolted to the shell pieces, and s
6、hall furnish bearing support for the center pin and connections to transmit extreme loads from the sheave to the fittings. INCH-POUNDComments, Suggestions, or questions on this document should be addressed to: Defense Supply Center Philadelphia, ATTN: DSCP-NASA, 700 Robbins Ave., Philadelphia, PA 19
7、111-5096 or email to dscpg omit for 4 times (see 4.3) Rig code from figure 2 (A, B, or C) Size code from Table 1 Basic CID numbers 6.2 Source of documents. 6.2.1 FAR. The FAR may be obtained from the Regulatory Secretariat, 1800 F Street NW, Washington, DC 20405 or online at http:/www.acqnet.gov. Pr
8、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59809 56.2.2 Government documents. Copies of Military and Federal documents are available online at http:/assist.daps.dla.mil or from the Standardization Documents Order Desk, 700 Robbins Avenue, Buil
9、ding 4D, Philadelphia, PA 19111-5094. 6.2.3 ASTM Standards. Copies of ASTM standards may be obtained from the ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or online at http:/www.astm.org. 6.3 Ordering data. The contract or order should specify the following: a. CID doc
10、ument number, revision, and CID PIN. b. Product conformance provisions. c. Packaging requirements. 6.4 Key words. Center pin Hook Rig Sheave Military interests: Preparing activity: DLA-IS Custodians: (Project 3940-2008- 003) Army CR4 Navy SH Air Force 99 Reviewing activities: Navy YD Air Force - 84
11、NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at http:/assist.daps.dla.mil . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
