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CA28102

CAPTIVE SCREW ASSEMBLY, FULLY RETRACTED,  NON-FLOATING, SPRING LOADED, NUT RETAINER TYPE, .138-32 THRU .250-28 THREAD SIZES

current revision available for download at  LISI Aerospace

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TABLE 1:

NOMINAL
SIZE
FIRST
DASH
NUMBER
T
THREAD
SIZE
ΦA
±.015
B
±.030
B1
±..30
C
±.015
ΦD
±.015
ΦE
REF
F
HEX
SIZE
G
SEE
FIGURE
2
H
HEX
USE
NUT RETAINER
TENSILE
STRENGTH
LBS. MINIMUM
300
SERIES
A286
-06 .138-32UNC-3A .260 .710 .650 .312 .250 .117 .125 .062 .250
.244
CA28085-06-() 248 248
-08 .164-32UNC-3A .300 .800 .740 .312 .315 .143 .156 .062 .312
.305
CA28085-3-() 1,120 1,207
-3 .190-32UNF-3A .300 .810 .750 .312 .315 .169 .156 .062 .312
.305
CA28085-3-() 1,207 1,207
-4 .250-28UNF-3A .400 1.055 1.020 .375 .440 .226 .187 .070 .438
.428
CA28085-4-() 2,046 2,046

TABLE 2:
FOR .138-.32, .164-32
AND .190-32 THREAD SIZES

SECOND
DASH
NUMBER
L
±.015
-6 .375
-7 .438
-8 .500
-9 .562
-10 .625
-11 .688
-12 .750
-13 .812
-14 .875
-15 .938
-16 1.000

TABLE 3:
FOR .250-28 THREAD SIZES

SECOND
DASH
NUMBER
L
±.015
-7 .438
-8 .500
-9 .562
-10 .625
-11 .688
-12 .750
-13 .812
-14 .875
-15 .938
-16 1.000
-17 1.062
-18 1.125
-19 1.188
-20 1.250

NOTES; UNLESS OTHERWISE SPECIFIED:
1. MARERIAL: STANDARD SCREW ASSEMBLY:
1.1 SCREW: 18-8 TYPE 300 SERIES CRES PER AMS-QQ-S-763, AMS5640, ASTM-A484 AND/OR ASTM-A-582.
1.2 HOUSING: 18-8 TYPE 300 SERIES CRES PER AMS56401, ASTM-A484 AND/OR ASTM-A582.
1.3 SPRING: 18-8 TYPE 302 SERIES CRES PER ASTM-A580 AND/OR ASTM-A313.
1.4 FLATWASHER: 18-8 TYPE 302 SERIES CRES CONDITION A PER ADS5516 AND-OR MIL-S-5059.
1.5 LOCKWASHER: 18-8 TYPE 300 SERIES CRES PER AMS-QQ-SS763 AND/OR AMS-S-7720.
1.6 OPTIONAL SCREW ONLY: A286 CRES PER AMS5731 AND/OR AMS5737 DESIGMA BT LETTER “C”.

2. HEAT TREAT:
2.1 300 SERIES – NONE
2.2 A286 CRES 140,000 PSI MINIMUM PER AMS2700.

3. FINISH:
3.1 STANDARD: PASSIVATED PER AMS2700.
3.2 BLACK OXIDE PER MIL-DLT-13924, DESIGNATED BY LETTER “B”.

4. CODE:
4.1 FIRST DASH NUMBER DESIGNATES THREAD SIZE
SECOND DASH NUMBER INDICATES “L” IN .0625 INCREMENTS CONVERTED TO 3 DECIMAL PLACES.(SEE TABLES 2 AND 3)
4.2 “C” IN LIEU OF FIRST DASH DESIGNATES A286 CRES, SCREW ONLY.
4.3 “B” FOLLOWING FIRST DASH NUMBER DESIGNATES BLACK OXIDE ONLY.
4.4 “S” “P” OR “HS” FOLLOWING LAST DASH NUMBER INDICATES RECESS.
4.4.1 “S” = SLOTTED PER ANSI B18.6.3 TYPE 1.
4.4.2 “P” = CROSS RECESS PER ANSI B18.6.3 TYPE 1.
4.4.3 “HS” = HEX SOCKET PER ANSI B18.6.3 (SEE TABLE 1, “F” MIDENSION FOR SIZES).
4.4.4 “HH” = HEX HEAD O RECESS.
4.4.5 “K” = FOLLOWING RECESS DESIGNATION INDICATES KNURLED HEAD, EXCEPT NO KNURL OPTION FOR HEX SOCKET OR HEX HEAD.

5. IF ORDERING CAPTIVE SCREW ASSEMBLIES WITH SHORTER “L” LENGTHS NOT LISTED IN TABLES 2 AND 3, THE THREAD LENGTHS WILL BE SHORTER THAN THOSE LISTED IN TABLE 1 (DIMENSION “C”). APPROXIMATE THREAD LENGTHS = L-G. SEE FIGURE 2 AND TABLE 1.

6. DESIGNAED TO BE USED WITH CA28085-()-(), NUT RETAINER.

7. FOR INSTALLATION SEE CAL-STD-0140

8. PART CALLOUT EXAMPLE:

<9> PARTS TO BE IDENTIFIED WITH LOCATION OPTIONAL.

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