1、 A-A-52210 - 9999974 0372675 44T A-A-522 I O September 13. 1996 SUPERSEDING 26 June 1970 (See 6.5) MIL-S-15769C COMMERCIAL ITEM DESCRIPTION STRAIGHTEDGE, STEEL (MACHINISTS AND TOOLMAKERS) The General Services Administration has authorized the use of this commercial item description for all federal a
2、gencies. 1. SCOPE 1.1 Scope. This commercial item description (CID) covers a 36 inch long machinists and toolmakers straightedge, not graduated, semi-hard, with one edge beveled and one edge square, for general machine shops. 1.2 Intended use. The steel straightedge is intended for use in general sh
3、op practice and to lay out lines and check surfaces on ordinary shop jobs. 2. SALIENT CHARACTERISTICS 2.1 Design and construction. All surfaces of the straightedge shall be flat and parallel with the opposite surface. Except for one edge of the straightedge, the ends and working edges of each straig
4、htedge shall be squared (90 degrees 5 5 minutes) for the full thickness. One edge of the straightedge shall be uniformly beveled and squared for the full width of the land. The straightedge shall be made of corrosive resistant steel. These requirements, and the hardness, shall be as specified in tab
5、le I when tested as specified in 4.2 and 4.3. Beneficial comments (recommendations, addition, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, U.S. Army Natick Research, Development and Engineering Center, Natick, MA O 1760-50 I8 by
6、using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter AMSC NIA FSC 5210 Licensed by Information Handling ServicesA-A-522 1 O 2.2 Dimensions and tolerances. Straightedges shall be of the dimensions and within the tolerances specified
7、 in table I. TABLE I. Straiehtedpe steel Parallelism Straightness Straightness Length Width Thickness tolerance for tolerance on tolerance on Hardness Bevel Width i 1/32 (approx.) (approx.) working edges beveled squared Rockwell (approx.) land working edge working edge (C) (approx.) Inches Inches In
8、ch Inch Inch Inch Degrees Inch 36 2-3 1/4-5/16 0.001 0.0005 0.0006 22-32 20 3/64 2.3 Marking. The straightedges shall be marked for identification with the manufacturers name or readily identifiable trademark; 2.4 Finish. All the surfaces of the straightedge shall be polished. 2.5 Workmanshi 9. All
9、surfaces of the straightedge shall be smooth with no burrs, sharp edges, cracks, gouges, grind chatter, or bum marks. 2.6 Metric produ cts. Products manufactured to metric dimensions will be considered on an equal basis with those manufactured using inch-pound Units, provided they fall within the to
10、lerances specified using conversion tables contained in the latest revision of ASTM E 380, and all other requirements of this CID are met. If a product is manufactured to metric dimensions and those dimensions exceed the tolerances specified in the inch-pound units, a request should be made to the c
11、ontracting officer to determine if the product is acceptable. The contracting officer has the option of accepting or rejecting the product. 3 REGULATORY REQUIREMENTS 3.1 Contractor-recovered materials. The offeror/contractor is encouraged to use recovered materials to the maximum extent practicable,
12、 in accordance with paragraph 23.403 of the Federal Acquisition Regulation (FAR). 4. QUALITY ASSURANCE PROVISIONS , 4.1 Product conformance. The products provided shall meet the salient characteristics of this commercial item description, conform to the producers own drawings, specifications, standa
13、rds and quality assurance practices, and be the same product that has been sold in the commercial market. The Government reserves the right to require proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract. 2 - . - . . .
14、 . . - . - . ._ . .- Licensed by Information Handling ServicesA-A-522 1 O The following market acceptance criteria are necessary to document the quality of the product to be provided under this CID. a. The company producing the item must have been producing a product meeting the requirements of this
15、 CID for at least 2 years. b. The company must have sold 500 units meeting this CID, in the commercial or government marketplace over the past 2 years. 4.2 Hardness test. The straightedge shall be tested for hardness at the center and 1 inch from each end, in accordance with ASTM E 18, as specified
16、(see 2.1 and 2.2). 4.3 Sauareness. flatness and parallelism tests. Utilizing standard gauges, indicators, and toolmakers surface plates, the straightedges shall be tested for squareness and flatness of surfaces and for the parallelism of opposite surfaces, as specified in 2.1 and 2.2. Any nonconform
17、ance shall constitute failure of this test. 5 PACKAGING 5.1 Packaping Preservation, packing and marking requirements shall be as specified in the contract or purchase order (see 6.1) 6. NOTES 6.1 Ordering Data. Purchasers should select the preferred options permitted herein and include the following
18、 information in procurement documents (if applicable). a. Title, number and date of this document. b. Packaging requirements (see 5.1) 6.2 Sources for Non-Government Association Documents. ASTM STANDARDS: E 18 - Tests for Rockwell Hardness and Rockwell Super Metallic Materials rdness o E 380 - Use o
19、f the International System of Units (SI) (The Modernized Metric System) (Application for copies of ASTM standards should be addressed to the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959). 3 Licensed by Information Handling Servicest A-A-52210 99
20、99974 0172678 159 1 A-A-522 1 O 6.3 Sources of Supply. A manufacturer whose products are known to meet the requirements of this document is listed below; however, competition is not limited to this company. Product Engineering Corporation Post Office Box 45009 9430 Bellanca Avenue Los Angeles, CA 90
21、045 (213) 776-1885 6.4 National stock numbers mSN). The following is the NSN assigned, which corresponds to this CID: Itern NSN Straightedge 5210-00-264-6400 6.5 Deleted items. The following straightedges that appeared in MIL-S-15769C have been deleted in this CID since there are no user requirement
22、s for the items: Type 1 All items Type II Type v All items 48,72,96 and 120 inch lengths MILITARY INTERESTS: CIVIL AGENCY COORDINATING ACTIVITY: Custodians: Army -GL Air Force - 99 Review activities: Army- AT,AV Navy - MC, NP, SH Air Force - 84 GSA-FSS Preparing Activity: Army - GL (PROJECT 521 0-0293) 4 Licensed by Information Handling Services
