MS51825 Sleeves, Clinches, Tube Fitting, Flareless Type, Hydraulic

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MS51825H

TABLE I. Material and finish designators.

Designator	Material	Finish
Blank	Steel	Cadmium plating in accordance with SAE-AMS-C-81562, type II, class 3 or SAE-AMS-QQ-P-416, type II, class 2.
N	Steel	NAVAIR trivalent chromium pretreatment (TCP) in accordance with MIL-DTL-81706, type II, class 1a.
J	Steel	Zinc plating with chromate conversion in accordance with ASTM B633; type II or III, Fe/Zn 5, or ASTM B695, type II, class 5.
H	Steel	Zinc phosphate in accordance with MIL-DTL-16232, type Z, class 1 and shall be hexavalent chromium free.
P	Steel	Zinc plating with colorless passivate in accordance with ASTM B633, type VI, Fe/Zn 5.
S	Corrosion resistant steel 1/	No additional finish. Passivation in accordance with SAE-AMS2700, type 6 or 7. 1/
V	Steel	Zinc nickel in accordance with SAE-AMS2417, type 1.

1/ Stainless steel of such hardness as to be capable of biting, fully annealed type 304 stainless steel

tubing.

Part or Identifying Number (PIN) example:

MS51825 - 1 SS B

MS number

Dash number (see figure 1)

Material and finish designator, see table I Style (A or B), see figure 1

Guidance on use of alternative parts with less hazardous or nonhazardous materials. This specification provides for a number of alternative plating materials via the PIN. Users should select the PIN with the least hazardous material that meets the form, fit and function requirements of their application.

For old designs that use clinch sleeves in accordance with MS51825, tables II and III show supersession data to clinch sleeves in accordance with SAE-J514. Users are cautioned to evaluate replacements for their particular application.