Howmet Fastening Systems
Howmet Fastening Systems
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Email: HFSTechSupport@howmet.com
Website: www.hfs.howmet.com
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THREAD: AS8879 Class-3A
  1. MATERIAL:
    • Fitting - 6AL-4V titanum per AMS4928, AMS4965 or AMS4967, 130 KSI UTS Min.
    • Locking - A286 cres per AMS5731, AMS5732, AMS5734 or AMS5737, 34-40 HRC.
  2. FINISH:
    • Fitting - Anodic treatment per AMS2488, Type 2.
    • Locking - Passivate per AMS2700, Type 2.
Unit of Measure

Specifications

Tube OD (REF)

 N/A 0.250

A Thread AS8879 Class-3A

 N/A 0.4375-24 UNJS

B Thread AS8879 Class-3A

 N/A 0.3125-24 UNJF

C (± .005)

 N/A 0.514

D (+.005/-.002)

 N/A 0.239

E (MIN)

 N/A 0.331

F (REF)

 N/A 0.400

G (+.010/-.005)

 N/A 0.592

H (+.000/-.005)

 N/A 0.355

J (+.010/-.005)

 N/A 0.125

K (<±> .007)

 N/A 0.192

N (MAX)

 N/A 0.124

P (± .020)

 N/A 0.431

O-Ring Size (REF)

 N/A AS568-010

Adapter Weight (LBS/100 PCS Approx)

 N/A 1.730

Porting Tool No.

 N/A RPT04

Basic Broach Tool Impact Type

 N/A RFOPB5004

O-Ring Installation Tool Number

 N/A ORT312

Combination Wrench and Drive Tool

 N/A RF5004DW

Locking Removal Tool

 N/A RF04LPDE

Engineering information

N/A ENGINEERING INFORMATION:
a. THESE PARTS ARE PRIMARILY DESIGNED FOR USE HYDRAULIC SYSTEMS (MILITARY PROCUREMENT SPECIFICATION NUMBER MIL-F-85421 TYII) COMPATIBLE WITH TITANIUM.
b. THESE PARTS PROVIDE SEMI-PERMANENT MALE ADAPTER INSTALLATIONS IN VALVE AND CYLINDER BODIES, MANIFOLDS ETC...
c. SERRATED LOCKRING PREVENTS ROTATION WHEN MATING LINES ARE ATTACHED OR REMOVED.

Installation information

N/A INSTALLATION INFORMATION:
d. ADAPTERS TO BE INSTALLED AND REMOVED FOR APPROPRIATE TUBE SIZE.
e. "N" AND "P" STAND-OFF DIMENSIONS ARE FOR DESIGN PURPOSES ONLY. DO NOT USE AS INSTALLATION DATA.
f. THIS DIMENSION MEETS THE MINIMUM REQUIREMENTS OF MILITARY PROCUREMENT SPECIFICATION NUMBER MIL-F-85421, EXCEPT SIZE -02.
g. 0-RINGS MUST BE SPECIFIED SEPARATELY AND SHALL BE SELECTED BASED ON SYSTEM FLUID AND TEMPERATURE AND ARE NOT SUPPLIED BY HFS.

Notes

N/A NOTES: UNLESS OTHERWISE SPECIFIED
3. LOCKRING RETAINED ON ADAPTER BY CONTROLLED INTERFERENCE FIT.
4. SEALING SURFACE: NO VISIBLE DEFECTS. TO BE PROTECTED FOR SHIPMENT. TAKE CARE IN HANDLING.
5. THIS PART IS USED IN CONJUNCTION WITH AN O-RING, O-RING SIZE PER AS568.
6. IDENTIFICATION:

  • MARK AT LOCATION SHOWN PER AS478, METHOD 2 OR 15, MANUFACTURER'S NAME, TRADEMARK OR CAGE CODE.
  • BAG AND TAG PER AS478, METHOD 35D. MANUFACTURER'S NAME, TRADEMARK OR CAGE CODE AND PART NUMBER.

    7. ALL MACHINED SURFACES SHALL BE SMOOTH TO 125 MICROINCHES Ra, SERRATION 250 MICROINCHES Ra, SEALING SURFACES 63 MICROINCHES Ra PER ANSI/ASME B46.1
    8. BREAK EDGES .003 - .015.
    9. PROCUREMENT SPECIFICATION: SAE AS85421 EXCEPT AS SPECIFIED ON THIS CATALOG.