1、, MIL-N-85bL5 53 99999Ob OLL2222 2 = D-Oq-61 MIL-N-85615 1 September 1986 MILITARY SPECIFICATION NUT, SEALING, SELF-LOCKING, 250F, 45OOF GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specificati
2、on establishes the requirements for the manufactura acceptance of self-locking nuts for sealing fluids in tempera- tures up to 25OOF and 45OOF. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specifications and standards form a part of this specifi
3、cation to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation. SPECIFICATIONS FEDERAL QQ-P-416 TT-E-751
4、Ethyl Acetate, Technical TT-I -735 Isopropyl Alcohol P1 ati ng, Cadmi um (Electrodeposited) TT-M-2 6 1 Methyl Ethyl Ketone, Technical TT-N-97 Naphtha Aromatic Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be a
5、ddressed to: Commanding Officer, Naval Air Engineering Center, Systems Engineering and Standardization Department, Code 93, Lakehurst, NJ 08733, by using. the self- addressed. Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FS
6、C 5310 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. 5.S DOCUMENT COLJTAINS 2 PAGES. - -7 Licensed by Information Handling ServicesMI L-N-85615 SPECIFICATIONS (Continued) FEDERAL (Continued) GGG-W-641 PPP-H-1581 MIL I TARY MIL-C-5541 MIL-T-5624 MIL-H-6088 MIL-B-68
7、12 MIL-1-6866 MIL-1-6868 MIL-H-6875 MIL-L-7808 MIL-A-8243 MIL-A-8625 MIL-S-8802 MIL-S-8879 MIL-L-8937 MIL-P-23377 MIL-C-43616 MIL-H-81200 Wrench, Socket (and Sockets, Handles, and Attachments for Socket Wrenches, Hand) Hardware (Fasteners and Re1 ated Items) Packaging and Packing for Shipment and St
8、orage of I Chemical Conversion Coatings on Aluminum and Aluminum Al 1 oys Turbine Fuel, Aviation, Grades JP-4 and JP-5 Heat Treatment of Aluminum Alloys Bolt, Aircraft Inspection, Penetrant Method of Inspect i on Process , Magnetic Particle for Heat Treatment of Steels (Aircraft Practice) , Process
9、O Lubricating Oil, Aircraft Turbine Engine, Synthetic Base Anti- Icing and Deici ng-Def rosting Fluid Anodic Coatings, for Aluminum and Aluminum Alloys Sealing Compound, Temperature-Resistant, Integral Fuel Tanks and Fuel Cell Cavities, High-Adhesion Screw Threads, Controlled Radius Root With Increa
10、sed Minor Diameter, General Specification for Lubricant, Solid Film, Heat Cured Primer Coating, Epoxy Polyamide, Chemical and Solvent Resi stant C1 eani ng Compound , Aircraft Surf ace Heat Treatment of Titanium and Titanium Alloys Licensed by Information Handling Servicesa -_ O a MIL-N-85615 53 m 7
11、794906 OLL2224 b = MI L-N-85615 SPEC1 FI CATIONS (Continued) MIL I TARY (Conti nued ) MI L-S-81733 MIL-R-83283 Sealing and Coating Compound, Corrosion Inhibitive Rubber, Silicone, High Strength, Cabin Pressure Seal Material, Diaphragm Type (See Supplement 1 for list of associated specifications.) ST
12、ANDARDS MI L I TAR Y MIL-STD-105 Sampling Procedures and Tables for Inspection by Attributes MIL-STD-129 MIL-STD-1312 . Fastener Test Methods Marking for Shipment and Storage (Copies of specifications and standards required by contractors in connection with specific acquisition functions should be o
13、btained from the contracting activity or as directed by the contracting activity.) The following documents form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted shall be those listed in the issue of the DODISS
14、specified in the solicitation. Unless otherwise spec- ified, the issues of documents not listed in the DODISS shall be the issue of the nongovernment documents which is current on the date of the solicitation. 2.2 Other publications. American National Standards Institute ANSI - B46.1 Surf ace Textur
15、e (Surface Roughness, Waviness and Lay) (Application for copies should be addressed to the American National Standards Institute, 1430 Broadway, Mew York, NY 10018.) National Aerospace Standards NAS 1801 NAS 3350 Nuts, Self-Locking, 450F, High Quality Screw, Hex Head, Phillips Recess, Full Thread, A
16、lloy Steel 160,000 psi Tensile (Application for copies should be addressed to the National Standards Associa- tion, Inc., 1725 De Sales Street, N.W., Washington, DC 20036.) Licensed by Information Handling ServicesMIL-N-85615 th a 2.3 Order of precedence. In the event of a conflict between the text
17、of detail specifications, specification sheets or MS standards), the text of this specification shall take precedence. shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS lis specification and the references cited herein (except for associat
18、ed Nothing in this specification, however, * 3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with the applicable specification sheet, In the event of any conflict between the requirements of this specification and the specification sheet, the
19、 latter shall govern. products which are authorized by the qualifying activity for listing on the applicable qualified products list at the time set for opening of bids (see 4.3 and 6.3). 3.2 Qualification-. The nuts furnished under this specification shall be 3.21 Requalification. Requalification w
20、ill be required in the event any change is made .in the product design, material, heat treatment, finish or lubrication. 3.3 Material. The material shall be as specified on the applicable 3.3.1 Heat treatment. Heat treatment of aluminum alloy nuts shall be in a specification sheet. accordance with M
21、IL - H 6088 ; steel nuts in accordance with MIL-H-6875; and titanium nuts in accordance with MIL-H-81200. 3.4 Design and construction. 3.4.1 Design. The nuts shall be of the prevailing torque type. The locking device shall not operate by means of separate movement as a result of installation and sha
22、ll not depend upon pressure on the bearing surface for locking action, 3.4.2 Construction. 3.4.2.1 Wrenching element. The wrenching element shall be in accordance with the applicable specification sheet. 3.4.2.2 Threads. Thread dimensions shall be in accordance with MIL-S-8879. Threads used on the l
23、ocking device may be displaced in any manner that provides self-locking nuts conforming to this specification. Thread aging shall be performed after plating in accordance with the applicable thread specification (except that the unlubricated nut with locking device incorporated shall allow the go pl
24、ug gage members to enter not less than a one-half turn before engagement of the locking device). When lubricant prevents use of standard gages, the nut shall permit free rotational (finger torqued) bolt engagement of not less than three-fourths turn. Licensed by Information Handling ServicesI O t MI
25、L-N-85615 3.4.2.3 Seal. Nuts shall have a sealing element integral to the nut body design. 3.5 Protective treatment. Protective treatment shall be as specified on the applicable specification sheet. 3.6 Lubrication. Nuts may.be lubricated to prevent nut-bolt seizure, The lubricant shall not be provi
26、ded the lubricant has passed the applicable tests (see 4.5.2). Qualified Products List (QPL-85615) shall identify the lubricant and shall classify it as either dry film or soluble film. changed without requalification of the nut, except as noted in 3.6.1. 3.6.1 -. When specified on the applicable sp
27、ecification sheet, the 250F and 450F nuts shall be coated with graphite-free dry film lubricant. If lubricant is selected from QPL-8937, no testing of lubricant is required; if lubricant is not selected from QPL-8937, then lubricant shall be subjected to and pass the applicable tests (see 4.5.2 thro
28、ugh 4.5.2.5). The 3.6.2 Soluble film lubricant. When specified on the applicable spec- ification sheet, the nuts shall be coated with a lubricant that is removable (see 4.5.3). 3.7 Axial tensile strength. The nuts shall have an axial tensile strength of not less than the values specified on the appl
29、icable specification sheet (see 4.5.4.2). 3.8 Torque. 3.8.1 Wrench torque. Wrenchable nuts shall withstand the wrench torque values specified in Table I (see 4.5.4.3.1). nuts shall show no indication of permanent deformation that may prevent its proper application and removal with a box or socket wr
30、ench. The nuts shall show no evidence of cracking (see 4.5.4.7). Upon completion of the test, the 3.8.2 Torque effectivity (room temperature). The nuts shall not exceed room temperature maximum locking torque values and shall not be lower than the minimum breakaway torque values specified in fable I
31、I (see 4.5.4.3.2). 3.8.3 Torque effectivity (after elevated temperature). The nuts shall not exceed the maximum locking torque values and shall not be lower than the minimum breakaway torque values specified in Table II (see 4.5.4.3.3 and 4.5.4.303-1). 3.8.4 Permanent set. The nuts shall not exceed
32、the maximum locking torque and shall not be lower than the minimum breakaway torque values specified in Table II (see 4.5.4.3.4). 3.8.5 Torque out (A.R.E. nuts or plate nuts). Torque out values for A.R.E. (Attached Retention tlement) nuts or Dlate nuts with no axial load on the seat of the nut shall
33、 be not less than the values listed in Table II (see 4.5.4.3.5). This test is not applicable to wrenchable nuts. Licensed by Information Handling ServicesMI L-N-85615 Nominal Size 0.164-32 O. 190-32 O, 250-28 0.312-24 O. 375-24 0.437-20 0.500-20 TABLE b Wrench torque values. Wrench Torque Minimum (i
34、n. pounds) Al umi num 1 Titanium and Alloy Nuts 1 Steel Nuts - 1/ CRES Nuts - 2/ 25 45 115 I 30 220 480 630 30 60 150 330 530 825 1125 27 50 125 280 430 650 900 1/ Wrench torque values are in accordance with NAS 3350 z/ Wrench torque values are in accordance with NAS 3350 TABLE II. Torque values. -
35、l/ Nomi na1 Size ob 164-32 O. 190-32 0,250-28 Ob 31 2-24 0.375-24 O . 437-20 O. 500-20 Room Temperature (in.4 b) 15 ia 30 60 80 1 O0 150 Maximum Locking Torque Room Temperature After Bake ( in . -1 b) 30 36 60 120 160 200 300 Minimum Break away Torque (in.-1 b) 1.5 2.0 3.5 6.5 9.5 14.0 18,O Torque o
36、ut (in.-lb) 45 60 1 O0 160 240 350 400 - 1/ Values apply to nuts as lubricated by manufacturer. Push out (pounds) 80 1 O0 125 125 125 125 125 Licensed by Information Handling ServicesMIL-N-85bL5 53 7777906 OLL2228 3 W O k a MIL-N-85615 1 3.8.6 Push out (A.R.E. nuts or plate nuts). Push out values fo
37、r A.R.E. nuts or plate nuts shall be not less than the values listed in Table II (see 4.5.4.3.6) 3.9 Vibration. The nuts shall show no evidence of failure when sub- jected to the vibration test (see 4.5.4.4). 3.10 Stress durability (Alloy steel nuts). no evidence of failure when subjected to the str
38、ess durability test .(see 4.5.4.6). Alloy steel nuts shall show 3.11 Discontinuities. Discontinuities in the nuts shall be not greater than the depth limitations specified in Table III (see 4.5.4.7). be taken not to confuse cracks with discontinuities (see 6.4.1). not permitted in any location. TABL
39、E III. Maximum discontinuity depth limits. - 1/ Care shall Cracks are Nominal Thread Size 0.164-32 O. 190-32 O. 250-28 0.31 2-24 0.375-24 O 43 7 - 20 0.500-20 Limit Sheet inches) Bar /W i re 0.005 .O05 .O05 .O05 .O06 .O07 . O09 o. o1 o .o1 o .o10 .o1 o .o11 .o1 2 .O14 Rejectable Cri teri a Any crack
40、, regardless of location. Discontinuities in excess of specified limits. - 1/ Samples of nuts having indications may be sectioned and microexamined to determine whether the indications are due to tool or die marks, or dis- continuities, and to determine conformance of discontinuities to the depth li
41、mits specified. 3.12 Sealing effectivity. The nuts shall seal when subjected to the sealinq effectivity test (see 4.5.4.8 and 4.5.4.8.1). The nuts shall be suit- able for use with the fluids listed in 4.5.4.8. duct, finish and class of thread fit specified. and hanging burrs and slivers shall be rem
42、oved. 3.13 Workmanship. Workmanship shall be consistent with the type of pro- Sharp edges shall be.broken Licensed by Information Handling ServicesMIL-N-85615 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contract
43、or is responsible for the Derformance of all inspection requirements as specified herein. Except as otherwise spec- ified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless dis
44、approved by the Government. The Government reserves the right to perform any of the inspections set forth in the spec- ification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. All items must meet al
45、l require- ments of Sections 3 and 5. The inspection set forth in this specification shall become a part of the contractrs overall inspection system or quality program. shall not relieve the contractor of the responsibility of assuring that all products or supplies submitted to the Government for ac
46、ceptance comply with all requirements of the contract. Sampling in quality conformance does not authorize submission of known defective material, either indicated or actual, nor does it commit. the Government to acceptance of defective material. ified herein are classified as follows: The absence of
47、 any inspection requirements in the specification 4.2 C1 assif ication of inspections. The inspection requirements spec- a, Qualification inspection (see 4.3). b. Quality conformance inspection (see 4.4). 4.3 Qualification inspection. Qualification inspection shall consist of the inspections listed
48、in Table IV. 4.3.1 Retention of qualification. To maintain status on a Qualified Products List (QPL) , certification shall be submitted by the manufacturer at two year intervals to indicate continued compliance with the requirements of this specification. the Naval Air En ineering Center (NAEC), Sys
49、tems Engineering and Standardiza- tion Department 9 SESD), Code 931J, Lakehurst, NJ 08733-5100, who is acting under the direction of the Naval Air Systems Command, Certification shall be signed by a responsible official of management. The certification shall attest that the listed product(s) is still available from the listed plant, can be produced under the same conditions as originally qualified (i.e., same process, materials, construction, design, manufacturers part number or designation), and meets the requirements of the current issue of the spec- ification, cause fo
