ARMY FF-N-845 D-1981 NUT PLAIN WING INCH AND METRIC《英寸和度量螺母平针》.pdf

1、FF-N-81-15D 53 FF-N-845D Mau 8, 198L SUPERSEDING - Fed. Spec. FF-N-845C April 20, 1970 FEDERAL SPECIFICATION NUT, PLAIN, WING, INCH AND METRIC This specification was pproved by the Commissioner, Federal Supply Service, General Services Administration, for the use of all Federal ajencies. 1. SCOPE AN

2、D CLASSIFICATION 1.1 Scope. This specification covers the complete general and dimensional data for various types of 1.2 Classification. Wing nuts shall be of the following types, styles and sizes, as specified (see 6.2). wing nuts designed in the inch and metric systems. 1.2.1 Types and styles. Typ

3、e A - Cold forged. Style 1 - Undrilled regular wing. Style 2 - Drilled regular wing. Type B - Hot forged. Style 1 - Regular wing. Style 2 - High wing. Type C - Die casting. Style 1 - Regular wing. Style 2 - Low wing. Style 3 - High wing. Type D - Stamped. Style 1 - Regular wing. Style 2 - Low wing.

4、Style 3 - Regular wing with larger bearing surface. 1.2.2 Sizes. Wing nuts shall be classified by size in accordance with the basic major diameter of the thread. 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issues in effect O? date of.invitation for bids or request for proposal, form

5、a part of this specification to the extent specified herein. Federal Specifications: QQ-A-225/6 - Aluminum Alloy Bar, Rod and Wire; Rolled, Drawn or Cold Finished, 2024. 49-8-613 - Brass, Leaded and Nonleaded: Flat Products (Plate, Bar, Sheet and Strip). 99-8-626 - Brass, Leaded and Nonleaded; Rods,

6、 Shapes, Forgings and Flat Products with QQ-N-290 - Nickel Plating (Electrodeposited). QQ-P-416 - Plating, Cadmium (Electrodeposited). QQ-2-325 - Zinc Coating, Electrodeposited, Requirements for. PPP-H-1581 - Hardware (Fasteners and Related Items), Packaging of. Finished Edges (Bar and Strip). Feder

7、al Standards: FED-STD-H28/2 - Screw-Thread Standards for Federal Services, Section 2, Unified Thread Form and Thread Series for Bolts, Screws, Nuts, Tapped Holes and General Applications. FED-STD-H28/21 - Screw-Thread Standards for Federal Services, Section 21, Metric .Screw-Threads. FED-STD-66 - St

8、eel: Chemical Composition and Hardenability. _c FSC 5310 THIS DOCUMENT CONTAINS r T PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-FF-N-BYSD 53 W qq74 Ob37BA o m “ - - FF-N-845D (Activities outside the Federal Government may obtain copies of

9、Federal specifications, standards, and commercial item descriptions as outlined under General Information in the Index of Federal Specifi- cations, Standards and Commercial Item Descriptions. The Index, which includes cumulative bimonthly supplements as issued, is for sale on a subscription basis by

10、 the Superintendent of Documents, U. S. Goverment Printing Office, Washington, DC 20402. (Single copies of this specification, other Federal specifications, and commercial item descriptions required by activities outside the Federal Government for bidding purposes are available without. charge from

11、General Services Administration Business Service Centers in Boston; New York; Washington, DC; Philadelphia; Atlanta, Chicago; Kansas City, MO; Fort Worth; Houston; Denver; San Francisco; Los Angeles; and Seattle, .WA. item descriptions, and the Index of Federal Specifications, Standards and Commerci

12、al Item Descriptions from established distribution points in their agencies.) (Federal Government activities may obtain copies of Federal specifications, standards, and commercial -. Military Specifications: MIL-F-495, - Finish, Chemical, Black, for Copper Alloys. MIL-A-8625 - Anodic Coatings for Al

13、uminum and Aluminum Alloys. MIL-C-13924 - Coating, Oxide, Black, for Ferrous Metals. Military Standards: MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. MIL-STD-1312 - Fasteners, Test Methods. DS51402 - Nut, Plain, Wing, Metric. HS35425 MS35426 - Nut, Plain, Wing, UNC-PB.

14、- Nut, Plain, Wing, UNF-26. (Copies of Military Specifications and Standards required by suppliers in connection with specific procurement functions should be obtained from procuring activity or as directed by the contracting officer.) fied herein. Unless a specific issue is identified, the issue in

15、 effect on date of invitation for bids or request for proposal shall apply. 2.2 Other publications. The followingdocuments form a part of this specification to the extent speci- AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) STANDARD: ANSI 818.17-1968 - Wing Nuts, Thumb Screws, and Wing Screws. (Appli

16、cation. for copies should be addressed to the American National Standards Institute, 1430 Broad- way, New York, NY 10018.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) STANDARDS: ASTM E8-79 - Tension testing of Metallic Materials, ASTM 886-76 - Zinc - Alloy Die Casting. ASTM A380-78 - Cleaning

17、and Descaling Stainless Steel Parts, Equipment and Systems. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) 3. REQUIREMENTS 3.1 Material. Recycled and reclaimed materials shall be.used to the maximum extent pra

18、cticable. Wing nuts shall be manufactured from the folldwing materials, as specified (see 6.2). I 3.1.1 Carbon steel. Carbon steel shall be in accordance with one of the carbon steel compositions of FED-STD-66. The carbon steel shall have a minimum ultimate tensile strength of 50,000 psi (345 MPa).

19、3.1.2 Corrosion-resisting steel. Corrosion-resisting steel shall be manufactured from the 300 series in accordance with FED-STD-66 or any other austenitic corrosion-resisting steel developed for cold heading or free machining. Provided by IHSNot for ResaleNo reproduction or networking permitted with

20、out license from IHS-,-,-I FF-N-845D 3.1.3 Aluminum alloy. Aluminum alloy shall be in accordance with QQ-A-225/6. 3.1.4 Brass. Brass shall be in accordance with QQ-B-613 or 94-8-626. 3.1.5 Zinc die casting alloy . Zinc die casting alloy shall be in accordance with ASTM 886, Alloy Composition UNS Z 3

21、3520 (see 6.5). 3.2 Protective finish. Unless otherwise specified (see 6.2), wing nuts shall be furnished uncoated. When specified (see 6.2), protective finishes shall be in accordance with the following paragraphs. thick). 3.2.1 Cadmium plating. Cadmium plating shall be in accordance with type II,

22、class 3 of QQ-P-416 (5.1 Fm 3;2.2 Zinc coating. Zinc coating sha 3.2.3 Anodic coating. Anodic coating 3.2.4 passivation. Passivation shall 11 be in accordance with type II, class 3 of QQ-A-325 (5.1 ;Llm thick). shall be in accordance with type II of MIL-A-8625. be in accordance with ASTI! A380. 3.2.

23、5 Nickel plating. Nickel plating shall be in accordance with. class 2 of QQ-N-290. 3.2.6 Black oxide. Black oxide coating for carbon steel shali be In accordance with class 1 of MIL-C-13924, for brass the finish shall be in accordanc with MIL-F-495 and for corrosion-resisting steel the coating shall

24、 be in accordance with class 4 of MIL-C-13924. 3.2.7 Zinc alloy finish. Zinc alloy wing nuts shall have a plain, bright finish. 3.3 Threads. U.S. Customary (inch) threads shall be in accordance with FED-STD-H28/2, class 2B, UNC or UNF, as specified (see 6.2), except type D wing nuts which shall be c

25、lass 28 modified. The minor diameter of the thread in type D wing nuts may be somewhat larger than the class 2B maximum, but shall not exceed the minimum pitch diameter. Metric threads shall be in accordance with FED-STD-H28/21, “M“ profile, tolerance class 6H. 3.4 Dimensions. Dimensions of the wing

26、 nuts shall be in accordance with MS35425, MS35426, DS51402 or ANSI B18.17, as specified (see 6.2). 3.5 Bearing surface. The bearing surface of all wing nuts shall be at right angles to the axis of the threaded hole within 3. The bearing surface shall be free from burrs, fins and protruding surface irregularities. 3.6 Concentricity. The threaded hole shall be concentric with the bo JIVILL.D AdmnrrstraIut, LL- other documents referenced herein. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-