MS51960D
Requirements:
1. Material. Corrosion resistant steel, 300 series as specified in SAE AMS-QQ-S-763. Type 304 or 316 or equal to or interchangeable with 16:18 or 18:8 chromium-nickel alloy steel.
2. Surface treatment. Passivated in accordance with procurement specification.
3. Protective coating. Black oxide coating in accordance with procurement specification. (When black oxide coating is required, the dash number shall be followed by a code letter "B").
4. Magnetic permeability. The screw shall meet the magnetic permeability requirements of the procurement specification.
5. Threads. Threads shall be in accordance with FED-STD-H28/2. Acceptability of screw threads shall be in accordance with FED-STD-H28/20, System 21.
6. Thread length. Full form threads shall extend to within 2 threads or less of head bearing surface for lengths thru 2.00 inches. Longer lengths shall have a minimum full form thread length of 1.50 inches.
7. Recess. The recess shall be in accordance with NASM9006.
8. Self-locking element. The self-locking element shall be in accordance with MIL-DTL-18240. (When a self- locking element is required, the dash number shall be followed by a code letter "L". If black oxide coating is also required, the dash number would first be proceeded with a "B" followed by a "L").
9. Part number. The part number shall consist of the basic MS number, followed by a dash number from
Table I. A code letter "B" for black oxide then a code letter "L" for self-locking will follow the dash number, if applicable. If black oxide is not required, and self-locking is required, an "L" will follow the dash number.
Example: MS51960 - 65 B L
Self-locking element Black oxide coating Dash number
Basic MS number
Notes:
MS51960-65BL - Screw, machine-flat countersunk head, 82°, cross-recessed-corrosion resistant steel, UNF-2A; .190-32UNF-2A nominal thread size; .50 length; black oxide coated with self-locking element.
1. All dimensions in inches.
2. Sizes above dotted line have undercut heads.
3. MS51960 supersedes MS35201, MS35250 and in part: MS35358, MS35363 and AN510.
4. In the event of a conflict between the text of this standard and the references cited herein, the text of this standard shall take precedence.
5. Changes from previous issue: Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes.
3
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business