1、- 9-05- i3 c MIL-B-L5382C 53 7797906 0100859 O = 3 d ” . * . * 19 May 1967 SUPERCEDING MIL-B-15382B . MIL-N-15721 A 25 March 1957, and 8 De em er 1951 ?se 8.2) MILITARY SPECIFICATION BOLT, FIREBRICK ANCHOR 1. SCOPE 1 .i Scope, - This specification covers anchor bolts for anchoring firebricks in oil-
2、fired boilers of Naval vessels. 1,2 Classification. - Anchor bolts shall be of the following classes and types, as specified (see 6.1): Class A - 25 percent chromium -,20 percent nickel corrosion Class B - Nickel-chromium-iron-alioy steel. resistant steel* Type a - Straight end* Type b - Hook end. 2
3、. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specification ta the extent specified herein, SPECIFICATION. MILITARY MIL-H-3982 - Hardware (Fasteners and Related Items); Packaging and Packing for Sh
4、ipment and Storage of. FSC 5306 THIS DOCUMENT CONTAINS y PAGES. o Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-25382C 53 7777706 0200860 7 MIL-B-7 5382C (SHIPS STANDARDS FEDERAI, FED-STD-151 - Metals; Test Methods. MILITARY MIL-STD-I05 - Samp
5、ling Procedures and Tables for Inspection by At-tribtes. MIL-STD-129 - Marking for Shipment and Storage. (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the prociwing activity or as direc
6、ted by the contracting officer. ) 2.2 Other publications. - The following documents form a part of this specification to the extent specified herein. indicated, the issue in effect on date of invitation for bids or request for proposal shdl apply. Unless otherwise AMERICAN SOCIETY FOR TESTING AND MA
7、TERIALS ASTM A-276 - Hot-Rolled and Cold-Finished Corrosion-Resisting ASTM B-166 - Nickel-Chromium-Iron Alloy Rod and Bar, Steel Bars. (Copies may be obtained from the American Society For Testing and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103. ) (Technical society and technical a
8、ssociation specifications and standards are generally available for reference from libraries. also distributed among technical groups and using Federal agencies. ) They are 3. IUQUIRENENTS 3.1 Material. - Anchor bolts shall be made of material conforming to ASTM A-276, type 310 for class A bolts, an
9、d ASTM B-166 for class B bolts, 3.2 Tvr, e a, s traiwht end. - The anchor bolts shall be of the shape and dimensions shown on figure 7. specified (see 6.1 ). The length of the shank shall be as .3.3 TM e b, hook-end. - The anchor bolts shall be of the shape and The axis of the bent portion of the sh
10、ank dimensions shown on figure 2, shall be parallel to n diagonal of the head, as shown on figure 2. length of the shank shall be as specified (see 6.1 ), The 3.4 Dimension tolerances. - Dimensions of bolts shall be within the tolerance limits specified in table I. 2 Provided by IHSNot for ResaleNo
11、reproduction or networking permitted without license from IHS-,-,-MIL-B-I5382C( SHIPS) Dimension Tolerance Inches Inch 1-1/4 square 2 1/16 + 1/16 as specified as specified z 1/16 , i +0.06, -0.01 +, 0.01 ;$Y Table I- Dimension tolerances I tem Head width Head thickness Shank diameter n Bolt length L
12、ength of hook end, type b only 3.5 Heads. - Unless otherwise specified (see 6.1), anchor bolt heads shall be forged, resistance (flash) welded, or screwed at the option of the contrac tor. 3.5.1 Forged. - The forged bolts shall have a fillet under the head of not less than 1/8 nor more than 1/4 inch
13、 radius. flash-welted to the shank, and the weld shall withstand the testspecified in 4.5.2. 3.5.2 Resistance (flash) welded. - The bolts shall have heads securely .I 3.5.3 Screwed. - The bolts shall have heads screwed onto the shanks. The heads, through which 3/8-inch ?6NC2 or 16UNCzB holes have be
14、en tapped, shall be screwed tightly onto shanks, the upper ends of wNch have been. threaded for a distance of approximately 7/16 inch wxth 3/8-inch 16NC3 or 16UNc2A threads. The part of the shanks which protrudes through the head shall then be heated and peened over so that it is impossible to unscr
15、ew the head from the bolt (see figure 3). 4. QUAL1 TY ASSURIINCE PRDVI SIONS 4.1 Resuonsibility for inspection. - Unless otherwise specified in the contract or purchase order, the supplier is responsible for the per- formance of all inspection requirements as specified herein. Except as otherwise sp
16、ecified the supplier may utilize his own facilities or any comercial laboratory acceptable ta the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to pres
17、cribed requirenents. 4.2 m. - All bolts of the same type, class, and nominal length offered for inspection at one time shall constitute a lot for purposes of inspection and tests: . 3 o Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-15382C (SH
18、IPS) 4.3 samPlin for yisual and dimensional examination. - Sampling for visual and di,mensionaexdnation shall be conducted in accordance with MIL-STD-IO5 at inspection level S-1 and acceptable ,quality level = 1.5 percent defective. 4.3.2 Samnliw for chemical analysis. - 4.3.2.1 When varifiable evid
19、ence has been furnished by the manu- facturer that the bar and rod stock used conforms to class A or B (see 3.1), as specified, two bolts for chemical analysis shall be taken from each lot t0 verify their nickel and chromium content. 4.3.2.2 When finished bolts cannot be identified as being processe
20、d from bar and rod stock conforming to class A or B (see 3.1) as specified, a sample of bolts shall be selected at random in accordance with table II for chemical analysis. Table II - Sampling for chemical analysis and for tension load test of welded bolts. Number of bolts in . Number of bolts insri
21、ection lot in samde 280 or less 281 - 1200 1201 - 10,000 10,001 or over 3 5 8 13 4.3.2.3 Representative millings or chips shall be taken from the head .%.tad from the shank of each sample bolt (from the head or the shank of each bolt in the case of forged bolts) and kept separate. of welded bolts, s
22、amples f0.r chemical analysis may be taken from tension load test specimens after tension testing. The samples shall be free from oil, dirt, grit or other foreign mAtter and shall consist of not less than 2 ounces. In the case 4.3.3 vIOUS ISSUE OF THIS DOCUMENT. Preparing activity: Navy - SH (Projec
23、t 5306-Nol 5Sh) 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-I5382C( SHIPS) - 1 end. n 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-B-L5382C 53 777770b 02008b7 T MIL-B-l5?82C( SHIPS) Figure 3 - Screwed and peened heads for type a or b anchor bolts. 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
