DLA A-A-55801 A-2012 RUBBER SILICONE PACKING PREFORMED (O-RING).pdf

1、AMSC N/A FSC 5331 A-A-55801A 13 February 2012 SUPERSEDING A-A-55801 22 September 1995 COMMERCIAL ITEM DESCRIPTION RUBBER, SILICONE; PACKING, PREFORMED (O-RING) The General Services Administration has authorized the use of this Commercial Item Description for all Federal Agencies. 1. SCOPE. This comm

2、ercial item description (CID) covers a silicone rubber preformed packing (o-ring), of various classes and grades. 2. CLASSIFICATION. The silicone rubber shall be of the following classes and grades as specified. The designated grade number corresponds to the nominal Shore Durometer A hardness value.

3、 Class 1A Low temperature resistant Grade 40, 50, 60, 70, and 80 Class 1B Low temperature resistant and low compression set at high temperature Grade 40, 50, 60, 70, and 80 Class 2A High temperature resistant Grade 25, 40, 50, 60, 70, and 80 Class 2B High temperature resistant and low compression se

4、t Grade 25, 40, 50, 60, 70, and 80 Class 3A Low temperature, tear and flex resistant Grade 30, 50, and 60 Class 3B Tear and flex resistant Grade 30, 50, 60, 70, and 80 3. SALIENT CHARACTERISTICS. 3.1 Dimensional and physical requirements. Dimensional and physical requirements shall conform to SAE AS

5、568. O-rings not made to SAE AS568 shall be identified by a drawing number. INCH-POUND Comments, suggestions, or questions on this document should be addressed to Defense Supply Center Philadelphia (DSCP), ATTN: DSCP-NASA, 700 Robbins Avenue, Philadelphia, PA 19111-5096 or e-mail to dscpg&inspecomme

6、ntsdla.mil . Since contact information can change, you may want to verify the currency of this address information using ASSIST Online database at https:/assist.daps.dla.mil . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-55801A 2 3.2 Material.

7、 Material shall be silicone rubber formulated and processed to meet the physical and mechanical properties per the specified class and grade, when tested in accordance with ASTM test methods specified in Table I of CID A-A-59588. 3.3 Color. Unless otherwise specified, the color of the silicone rubbe

8、r shall be the natural color of the compound furnished. 3.4 Workmanship. The end product shall be clean, smooth finished, and free from dirt, flash or rough edges. 3.5 Metric products. Products manufactured to metric dimensions will be considered on an equal basis with those manufactured using inch-

9、pound units, provided they fall within specified tolerances using conversion tables contained in the latest revision of ASTM SI 10, and all other requirements of this commercial item description are met. If a product is manufactured to metric dimensions and those dimensions exceed the tolerances spe

10、cified in the inch-pound units, a request should be made to the contracting officer to determine if the product is acceptable. 4. REGULATORY REQUIREMENTS. The offeror/contractor is encouraged to use recovered materials to the maximum extent practicable, in accordance with paragraph 23.403 of the Fed

11、eral Acquisition Regulation (FAR). 5. PRODUCT CONFORMANCE. 5.1 Product conformance. The products provided shall meet the salient characteristics of this commercial item description, conform to the producers own drawings, specifications, standards, and quality assurance practices, and be the same pro

12、duct offered for sale in the commercial market. The government reserves the right to require proof of such conformance. 6. PACKAGING. Preservation, packing, and marking shall be in accordance with SAE AMS 2817 or as specified in the contract or order. 7. NOTES. 7.1 Part identification number (PIN):

13、the following part identification numbering procedure is for government purposes and does not constitute a requirement for the contractor. The PINs to be used for items acquired to this description are created as follows: AA55801 001 A 7 Grade 2 = 25 Class 3 = 30 A = 1A 4 = 40 B = 1B 5 = 50 C = 2A 6

14、 = 60 D = 2B 7 = 70 E = 3A 8 = 80 F = 3B N = NA Individual dash size as specified in SAE AS568. Boss seals are denoted by a 9, ie. 901. Basic CID number Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-55801A 3 7.2 Ordering data. The contract or o

15、rder should specify the following: a. Title, number, and date of this CID. b. Class and grade required. c. Size per SAE AS568 or drawing part number. d. Color required if other than natural color of compound furnished. e. Packaging requirements. 7.3 Source of documents. 7.3.1 ASTM standards. ASTM st

16、andards are available from the ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or online at http:/www.astm.org . 7.3.2 FAR. The Federal Acquisition Regulation is available from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402 or onlin

17、e at http:/www.arnet.gov/far . 7.3.3 Government documents. Federal and military documents are available online at https:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094. 7.4 Utilization caution. Use of thi

18、s material in items that may come in contact with human skin, food, or potable water is not recommended without prior approval of the appropriate medical service. 7.5 Key words. Class Flex resistant Grade Low compression 7.6 Changes from previous issue. Marginal notations are not used in this revisi

19、on to identify changes with respect to the previous issue due to the extent of the changes. Military interests: Civil Agency Coordinating Activity: GSA - FAS Custodians: Preparing activity: Army MR DLA - IS Navy AS Air Force - 11 (Project 5331-2012-001) Review activities: Army AR, CR, MI Navy OS, SH

20、, YD Air Force 84, 99 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 https:/assist.daps.dla.mil . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-